Custom Code-Generator Using ASP.NET Core

The main thought behind the sample was to generate common types of code easily.

A single-page application is built with ASP.NET Core & AngularJS, here’s the execution environment & API service in .NET Core to generate the code. For the front end, I have used AngularJS.

Content Focused

Connect to the database server
Get all database lists
Get all Table Columns by selecting a particular table
Choose column then
Generate code, that’s it.

Let’s dive into the code, first let’s get started with back-end work. We have connected our database server using a connection string.

Let's Work with Back-End and connect to the Database.

Create an API Controller to get all our operations done. In our controller class, let’s put a connection string to get connected with our databases.

private string conString = "server=DESKTOP-80DEJMQ; uid=sa; pwd=sa@12345;";

Get All Databases

Let’s create a method to get all the database lists from the database server. Below is the SQL query to get all databases.

SELECT name from sys. databases WHERE name NOT IN ('master', 'tempdb', 'model', 'msdb') ORDER BY create_date

Here’s the Get method to list all our databases on the server.

// api/Codegen/GetDatabaseList  
[HttpGet, Route("GetDatabaseList"), Produces("application/json")]  
public List<vmDatabase> GetDatabaseList()  
{  
    List<vmDatabase> data = new List<vmDatabase>();  
    using (SqlConnection con = new SqlConnection(conString))  
    {  
        int count = 0;  
        con.Open();  
        using (SqlCommand cmd = new SqlCommand("SELECT name from sys.databases WHERE name NOT IN ('master', 'tempdb', 'model', 'msdb') ORDER BY create_date", con))  
        {  
            using (IDataReader dr = cmd.ExecuteReader())  
            {  
                while (dr.Read())  
                {  
                    count++;  
                    data.Add(new vmDatabase()  
                    {  
                        DatabaseId = count,  
                        DatabaseName = dr[0].ToString()  
                    });  
                }  
            }  
        }  
    }  
    return data.ToList();  
}

Get all Table Column

Here, we are getting all tables from the selected database.

// api/Codegen/GetDatabaseTableList  
[HttpPost, Route("GetDatabaseTableList"), Produces("application/json")]  
public List<vmTable> GetDatabaseTableList([FromBody] vmParam model)  
{  
    List<vmTable> data = new List<vmTable>();  
    string conString_ = conString + " Database=" + model.DatabaseName + ";";  
    using (SqlConnection con = new SqlConnection(conString_))  
    {  
        int count = 0;  
        con.Open();  
        DataTable schema = con.GetSchema("Tables");  
        foreach (DataRow row in schema.Rows)  
        {  
            count++;  
            data.Add(new vmTable()  
            {  
                TableId = count,  
                TableName = row[2].ToString()  
            });  
        }  
    }  
    return data.ToList();  
}

Choose Column

Below SQL query below is used to get all table columns.

SELECT 
    COLUMN_NAME, 
    DATA_TYPE, 
    ISNULL(CHARACTER_MAXIMUM_LENGTH, 0), 
    IS_NULLABLE, 
    TABLE_SCHEMA 
FROM 
    INFORMATION_SCHEMA.COLUMNS 
WHERE 
    TABLE_NAME = '" + model.TableName + "' 
ORDER BY 
    ORDINAL_POSITION

Here is the method to list all selected table columns in the server.

// api/Codegen/GetDatabaseTableColumnList  
[HttpPost, Route("GetDatabaseTableColumnList"), Produces("application/json")]  
public List<vmColumn> GetDatabaseTableColumnList([FromBody] vmParam model)  
{  
    List<vmColumn> data = new List<vmColumn>();  
    string conString_ = conString + " Database=" + model.DatabaseName + ";";  
    using (SqlConnection con = new SqlConnection(conString_))  
    {  
        int count = 0;  
        con.Open();  
        using (SqlCommand cmd = new SqlCommand(
            "SELECT COLUMN_NAME, DATA_TYPE, ISNULL(CHARACTER_MAXIMUM_LENGTH, 0), IS_NULLABLE, TABLE_SCHEMA " +
            "FROM INFORMATION_SCHEMA.COLUMNS " +
            "WHERE TABLE_NAME = '" + model.TableName + "' " +
            "ORDER BY ORDINAL_POSITION", con))  
        {  
            using (IDataReader dr = cmd.ExecuteReader())  
            {  
                while (dr.Read())  
                {  
                    count++;  
                    data.Add(new vmColumn()  
                    {  
                        ColumnId = count,  
                        ColumnName = dr[0].ToString(),  
                        DataType = dr[1].ToString(),  
                        MaxLength = dr[2].ToString(),  
                        IsNullable = dr[3].ToString(),  
                        Tablename = model.TableName.ToString(),  
                        TableSchema = dr[4].ToString()  
                    });  
                }  
            }  
        }  
    }  
    return data.ToList();  
}

Now, let’s get an overview of the server code that is producing the generated code based on our database column.

[EnableCors("AllowCors"), Produces("application/json"), Route("api/Codegen")]  
public class CodegenController : Controller  
{  
    private readonly IHostingEnvironment _hostingEnvironment;  
    private string conString = "server=DESKTOP-80DEJMQ; uid=sa; pwd=sa@12345;";  

    public CodegenController(IHostingEnvironment hostingEnvironment)  
    {  
        _hostingEnvironment = hostingEnvironment;  
    }  

    #region +++++ Database +++++  
    // api/Codegen/GetDatabaseList  
    [HttpGet, Route("GetDatabaseList"), Produces("application/json")]  
    public List<vmDatabase> GetDatabaseList()  
    {  
        List<vmDatabase> data = new List<vmDatabase>();  
        using (SqlConnection con = new SqlConnection(conString))  
        {  
            int count = 0;  
            con.Open();  
            using (SqlCommand cmd = new SqlCommand(
                "SELECT name from sys.databases WHERE name NOT IN ('master', 'tempdb', 'model', 'msdb') ORDER BY create_date", con))  
            {  
                using (IDataReader dr = cmd.ExecuteReader())  
                {  
                    while (dr.Read())  
                    {  
                        count++;  
                        data.Add(new vmDatabase()  
                        {  
                            DatabaseId = count,  
                            DatabaseName = dr[0].ToString()  
                        });  
                    }  
                }  
            }  
        }  
        return data.ToList();  
    }  

    // api/Codegen/GetDatabaseTableList  
    [HttpPost, Route("GetDatabaseTableList"), Produces("application/json")]  
    public List<vmTable> GetDatabaseTableList([FromBody] vmParam model)  
    {  
        List<vmTable> data = new List<vmTable>();  
        string conString_ = conString + " Database=" + model.DatabaseName + ";";  
        using (SqlConnection con = new SqlConnection(conString_))  
        {  
            int count = 0;  
            con.Open();  
            DataTable schema = con.GetSchema("Tables");  
            foreach (DataRow row in schema.Rows)  
            {  
                count++;  
                data.Add(new vmTable()  
                {  
                    TableId = count,  
                    TableName = row[2].ToString()  
                });  
            }  
        }  
        return data.ToList();  
    }  

    // api/Codegen/GetDatabaseTableColumnList  
    [HttpPost, Route("GetDatabaseTableColumnList"), Produces("application/json")]  
    public List<vmColumn> GetDatabaseTableColumnList([FromBody] vmParam model)  
    {  
        List<vmColumn> data = new List<vmColumn>();  
        string conString_ = conString + " Database=" + model.DatabaseName + ";";  
        using (SqlConnection con = new SqlConnection(conString_))  
        {  
            int count = 0;  
            con.Open();  
            using (SqlCommand cmd = new SqlCommand(
                "SELECT COLUMN_NAME, DATA_TYPE, ISNULL(CHARACTER_MAXIMUM_LENGTH, 0), IS_NULLABLE, TABLE_SCHEMA " +
                "FROM INFORMATION_SCHEMA.COLUMNS " +
                "WHERE TABLE_NAME = '" + model.TableName + "' " +
                "ORDER BY ORDINAL_POSITION", con))  
            {  
                using (IDataReader dr = cmd.ExecuteReader())  
                {  
                    while (dr.Read())  
                    {  
                        count++;  
                        data.Add(new vmColumn()  
                        {  
                            ColumnId = count,  
                            ColumnName = dr[0].ToString(),  
                            DataType = dr[1].ToString(),  
                            MaxLength = dr[2].ToString(),  
                            IsNullable = dr[3].ToString(),  
                            Tablename = model.TableName.ToString(),  
                            TableSchema = dr[4].ToString()  
                        });  
                    }  
                }  
            }  
        }  
        return data.ToList();  
    }  
    #endregion  

    #region ++++ CodeGeneration ++++  
    // api/Codegen/GenerateCode  
    [HttpPost, Route("GenerateCode"), Produces("application/json")]  
    public IActionResult GenerateCode([FromBody] object[] data)  
    {  
        List<string> spCollection = new List<string>();  
        try  
        {  
            string webRootPath = _hostingEnvironment.WebRootPath; // From wwwroot  
            string contentRootPath = _hostingEnvironment.ContentRootPath; // From Others  

            var tblColumns = JsonConvert.DeserializeObject<List<vmColumn>>(data[0].ToString());  

            string fileContentSet = string.Empty;  
            string fileContentGet = string.Empty;  
            string fileContentPut = string.Empty;  
            string fileContentDelete = string.Empty;  
            string fileContentVm = string.Empty;  
            string fileContentView = string.Empty;  
            string fileContentNg = string.Empty;  
            string fileContentAPIGet = string.Empty;  
            string fileContentAPIGetById = string.Empty;  

            // SP  
            fileContentSet = SpGenerator.GenerateSetSP(tblColumns, webRootPath);  
            fileContentGet = SpGenerator.GenerateGetSP(tblColumns, webRootPath);  
            fileContentPut = SpGenerator.GeneratePutSP(tblColumns, webRootPath);  
            fileContentDelete = SpGenerator.GenerateDeleteSP(tblColumns, webRootPath);  
            spCollection.Add(fileContentSet);  
            spCollection.Add(fileContentGet);  
            spCollection.Add(fileContentPut);  
            spCollection.Add(fileContentDelete);  

            // VM  
            fileContentVm = VmGenerator.GenerateVm(tblColumns, webRootPath);  
            spCollection.Add(fileContentVm);  

            // VU  
            fileContentView = ViewGenerator.GenerateForm(tblColumns, webRootPath);  
            spCollection.Add(fileContentView);  

            // NG  
            fileContentNg = NgGenerator.GenerateNgController(tblColumns, webRootPath);  
            spCollection.Add(fileContentNg);  

            // API  
            fileContentAPIGet = APIGenerator.GenerateAPIGet(tblColumns, webRootPath);  
            spCollection.Add(fileContentAPIGet);  
        }  
        catch (Exception ex)  
        {  
            ex.ToString();  
        }  

        return Json(new  
        {  
            spCollection  
        });  
    }  
    #endregion  
}

In our generation mechanism, the .txt template is used for representing the real structure. In the below folder, we have all the formatted templates to present the real structure in generated code.

Generated code

Let’s expand the generator. Here’s the list that we have generated by this app

API Controller
ViewModel
AngularJS Controller
Stored Procedure
HTML Form

API-Generator

The below code method will generate the API Controller using a formatted text file.

public static dynamic GenerateAPIGet(List<vmColumn> tblColumns, string contentRootPath)  
{  
    TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderSub = new StringBuilder();  
    builderPrm.Clear();  
    builderSub.Clear();  
    string fileContent = string.Empty;  
    string queryPrm = string.Empty;  
    string submitPrm = string.Empty;  

    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    string path = @"" + contentRootPath + "\\template\\WebAPI\\APIController.txt";  

    // Api Controller  
    string routePrefix = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString()));  
    string apiController = textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "Controller";  
    string collectionName = "List<" + tableName.ToString() + ">";  
    string listObj = tableName.ToString() + "s";  
    string getDbMethod = "_ctx." + tableName.ToString() + ".ToListAsync()";  
    string entity = tableName.ToString();  
    string urlApiGet = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/GetAll";  
    string urlApiGetByID = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/GetByID/5";  
    string urlApiPost = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/Save";  
    string urlApiPut = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/UpdateByID/5";  
    string urlApiDeleteByID = "api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/DeleteByID/5";  

    // Entity Fields  
    foreach (var item in tblColumns)  
    {  
        // Parameter  
        builderPrm.AppendLine();  
        builderPrm.Append("                entityUpdate." + item.ColumnName + " = model." + item.ColumnName + ";");  
    }  
    submitPrm = builderPrm.AppendLine().ToString();  

    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#RoutePrefix", routePrefix.ToString())  
            .Replace("#APiController", apiController.ToString())  
            .Replace("#Collection", collectionName.ToString())  
            .Replace("#ListObj", listObj.ToString())  
            .Replace("#DbMethod", getDbMethod.ToString())  
            .Replace("#Entity", entity.ToString())  
            .Replace("#UrlApiGet", urlApiGet.ToString())  
            .Replace("#UrlGetByID", urlApiGetByID.ToString())  
            .Replace("#UrlPostByID", urlApiPost.ToString())  
            .Replace("#UrlApiPut", urlApiPut.ToString())  
            .Replace("#ColUpdate", submitPrm.ToString())  
            .Replace("#UrlDeleteByID", urlApiDeleteByID.ToString());  
    }  

    return fileContent.ToString();  
}

API Controller Format

In this portion, we have read the text as it is till the end line then replaced those #tag properties using C# dynamically. This is the main trick that is used in code generation.

[Route("#RoutePrefix"), Produces("application/json")]  
public class #APiController : Controller  
{  
    private dbContext _ctx = null;  
    
    public #APiController(dbContext context)  
    {  
        _ctx = context;  
    }  
    
    // GET: #UrlApiGet  
    [HttpGet, Route("GetAll")]  
    public async Task<object> GetAll()  
    {  
        #Collection #ListObj = null;  
        try  
        {  
            using (_ctx)  
            {  
                #ListObj = await #DbMethod;  
            }  
        }  
        catch (Exception ex)  
        {  
            ex.ToString();  
        }  
        return #ListObj;  
    }  
    
    // GET #UrlGetByID  
    [HttpGet, Route("GetByID/{id}")]  
    public async Task<#Entity> GetByID(int id)  
    {  
        #Entity obj = null;  
        try  
        {  
            using (_ctx)  
            {  
                obj = await _ctx.#Entity.FirstOrDefaultAsync(x => x.Id == id);  
            }  
        }  
        catch (Exception ex)  
        {  
            ex.ToString();  
        }  
        return obj;  
    }  
    
    // POST #UrlPostByID  
    [HttpPost, Route("Save")]  
    public async Task<object> Save([FromBody]#Entity model)  
    {  
        object result = null;  
        string message = "";  
        if (model == null)  
        {  
            return BadRequest();  
        }  
        using (_ctx)  
        {  
            using (var _ctxTransaction = _ctx.Database.BeginTransaction())  
            {  
                try  
                {  
                    _ctx.#Entity.Add(model);  
                    await _ctx.SaveChangesAsync();  
                    _ctxTransaction.Commit();  
                    message = "Ok";  
                }  
                catch (Exception e)  
                {  
                    _ctxTransaction.Rollback();  
                    e.ToString();  
                    message = "Error";  
                }  

                result = new  
                {  
                    message  
                };  
            }  
        }  
        return result;  
    }  
    
    // PUT #UrlApiPut  
    [HttpPut, Route("UpdateByID/{id}")]  
    public async Task<object> UpdateByID(int id, [FromBody]#Entity model)  
    {  
        object result = null;  
        string message = string.Empty;  
        if (model == null)  
        {  
            return BadRequest();  
        }  
        using (_ctx)  
        {  
            using (var _ctxTransaction = _ctx.Database.BeginTransaction())  
            {  
                try  
                {  
                    var entityUpdate = _ctx.#Entity.FirstOrDefault(x => x.Id == id);  
                    if (entityUpdate != null)  
                    {  
                        #ColUpdate  

                        await _ctx.SaveChangesAsync();  
                    }  
                    _ctxTransaction.Commit();  
                    message = "Ok";  
                }  
                catch (Exception e)  
                {  
                    _ctxTransaction.Rollback();  
                    e.ToString();  
                    message = "Error";  
                }  

                result = new  
                {  
                    message  
                };  
            }  
        }  
        return result;  
    }  
    
    // DELETE #UrlDeleteByID  
    [HttpDelete, Route("DeleteByID/{id}")]  
    public async Task<object> DeleteByID(int id)  
    {  
        object result = null;  
        string message = "";  
        using (_ctx)  
        {  
            using (var _ctxTransaction = _ctx.Database.BeginTransaction())  
            {  
                try  
                {  
                    var idToRemove = _ctx.#Entity.SingleOrDefault(x => x.Id == id);  
                    if (idToRemove != null)  
                    {  
                        _ctx.#Entity.Remove(idToRemove);  
                        await _ctx.SaveChangesAsync();  
                    }  
                    _ctxTransaction.Commit();  
                    message = "Ok";  
                }  
                catch (Exception e)  
                {  
                    _ctxTransaction.Rollback();  
                    e.ToString();  
                    message = "Error";  
                }  

                result = new  
                {  
                    message  
                };  
            }  
        }  
        return result;  
    }  
}

ViewModel-Generator

For a specific data model, we need to generate some view models. The below method will generate those data models.

public static dynamic GenerateVm(List<vmColumn> tblColumns, string contentRootPath)  
{  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderBody = new StringBuilder();  
    builderPrm.Clear();  
    builderBody.Clear();  
    string fileContent = string.Empty;  
    string queryPrm = string.Empty;  
    
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    string path = @"" + contentRootPath + "\\template\\ViewModel\\vmModel.txt";  
    string className = "vm" + tableName.ToString();  
    
    foreach (var item in tblColumns)  
    {  
        // parameter  
        builderPrm.AppendLine();  
        builderPrm.Append("  public " + TypeMap.GetClrType(item.DataType) + " " + item.ColumnName + " { get; set; }");  
    }  
    
    queryPrm = builderPrm.AppendLine().ToString();  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#ClassName", className.ToString())  
            .Replace("#Properties", queryPrm.ToString());  
    }  
    
    return fileContent.ToString();  
}

Stored Procedure-Generator

Insert-SP

This is a minimum label sp-generated query template for an insert operation. In the application, we need to modify those with our own additional logic.

public static dynamic GenerateSetSP(List<vmColumn> tblColumns, string contentRootPath)  
{  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderBody = new StringBuilder();  
    builderPrm.Clear();  
    builderBody.Clear();  
    
    string path = @"" + contentRootPath + "\\template\\StoredProcedure\\InsertSP.txt";  
    string fileContent = string.Empty;  
    string fileld = string.Empty;  
    string fileldPrm = string.Empty;  
    string queryPrm = string.Empty;  
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    
    string spName = ("[" + tableSchema + "].[Set_" + tableName + "]").ToString();  
    
    foreach (var item in tblColumns)  
    {  
        fileld = fileld + item.ColumnName + ",";  
        fileldPrm = fileldPrm + "@" + item.ColumnName + ",";  
    
        // parameter  
        builderPrm.AppendLine();  
        if ((item.DataType.ToString() == "nvarchar") || (item.DataType.ToString() == "varchar"))  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + "(" + item.MaxLength + "),");  
        else  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + ",");  
    }  
    
    queryPrm = builderPrm.Remove((builderPrm.Length - 1), 1).AppendLine().ToString();  
    
    // Body  
    builderBody.Append("INSERT INTO [" + tableSchema + "].[" + tableName + "](");  
    builderBody.Append(fileld.TrimEnd(',') + ") ");  
    builderBody.Append("VALUES (" + fileldPrm.TrimEnd(',') + ")");  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#Name", spName.ToString())  
            .Replace("#Param", queryPrm.ToString())  
            .Replace("#Body", builderBody.ToString());  
    }  
    
    return fileContent.ToString();  
}

Get-SP

This is a minimum label sp-generated query template for get operations, in the application we need to modify those with our own additional logic.

public static dynamic GenerateGetSP(List<vmColumn> tblColumns, string contentRootPath)  
{  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderBody = new StringBuilder();  
    builderPrm.Clear();  
    builderBody.Clear();  
    
    string path = @"" + contentRootPath + "\\template\\StoredProcedure\\ReadSP.txt";  
    string fileContent = string.Empty;  
    string fileld = string.Empty;  
    string fileldPrm = string.Empty;  
    string queryPrm = string.Empty;  
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    
    string spName = ("[" + tableSchema + "].[Get_" + tableName + "]").ToString();  
    
    foreach (var item in tblColumns)  
    {  
        fileld = fileld + item.ColumnName + ",";  
        fileldPrm = fileldPrm + "@" + item.ColumnName + ",";  
    }  
    
    // Body  
    builderBody.Append("SELECT " + fileldPrm.TrimEnd(',') + " FROM [" + tableSchema + "].[" + tableName + "]");  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#Name", spName.ToString())  
            .Replace("#Body", builderBody.ToString())  
            .Replace("#OrdPrm", fileldPrm.TrimEnd(',').ToString());  
    }  
    
    return fileContent.ToString();  
}

Update-SP

This is a minimum label sp-generated query template for update operations, in the application we need to modify those with our own additional logic.

public static dynamic GeneratePutSP(List<vmColumn> tblColumns, string contentRootPath)  
{  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderBody = new StringBuilder();  
    builderPrm.Clear();  
    builderBody.Clear();  
    
    string path = @"" + contentRootPath + "\\template\\StoredProcedure\\UpdateSP.txt";  
    string fileContent = string.Empty;  
    string fileld = string.Empty;  
    string fileldPrm = string.Empty;  
    string queryPrm = string.Empty;  
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    
    string spName = ("[" + tableSchema + "].[Get_" + tableName + "]").ToString();  
    
    foreach (var item in tblColumns)  
    {  
        fileld = fileld + item.ColumnName + ",";  
        fileldPrm = fileldPrm + item.ColumnName + " = @" + item.ColumnName + ",";  
        
        // Parameter  
        builderPrm.AppendLine();  
        if ((item.DataType.ToString() == "nvarchar") || (item.DataType.ToString() == "varchar"))  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + "(" + item.MaxLength + "),");  
        else  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + ",");  
    }  
    
    queryPrm = builderPrm.Remove((builderPrm.Length - 1), 1).AppendLine().ToString();  
    
    // Body  
    builderBody.Append("UPDATE [" + tableSchema + "].[" + tableName + "] SET " + fileldPrm.TrimEnd(',') + " WHERE [CONDITIONS]");  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#Name", spName.ToString())  
            .Replace("#Param", queryPrm.ToString())  
            .Replace("#Body", builderBody.ToString())  
            .Replace("#OrdPrm", fileldPrm.ToString());  
    }  
    
    return fileContent.ToString();  
}

Delete-SP

This is a minimum label sp-generated query template for delete operations, in the application we need to modify those with our own additional logic.

public static dynamic GenerateDeleteSP(List<vmColumn> tblColumns, string contentRootPath)  
{  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderBody = new StringBuilder();  
    builderPrm.Clear();  
    builderBody.Clear();  
    
    string path = @"" + contentRootPath + "\\template\\StoredProcedure\\DeleteSP.txt";  
    string fileContent = string.Empty;  
    string fileld = string.Empty;  
    string fileldPrm = string.Empty;  
    string queryPrm = string.Empty;  
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    
    string spName = ("[" + tableSchema + "].[Delete_" + tableName + "]").ToString();  
    
    foreach (var item in tblColumns)  
    {  
        fileld = fileld + item.ColumnName + ",";  
        fileldPrm = fileldPrm + "@" + item.ColumnName + ",";  
        
        // Parameter  
        builderPrm.AppendLine();  
        if ((item.DataType.ToString() == "nvarchar") || (item.DataType.ToString() == "varchar"))  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + "(" + item.MaxLength + "),");  
        else  
            builderPrm.Append("  @" + item.ColumnName + " " + item.DataType + ",");  
    }  
    
    queryPrm = builderPrm.Remove((builderPrm.Length - 1), 1).AppendLine().ToString();  
    
    // Body  
    builderBody.Append("DELETE FROM [" + tableSchema + "].[" + tableName + "] WHERE [CONDITIONS]");  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#Name", spName.ToString())  
            .Replace("#Param", queryPrm.ToString())  
            .Replace("#Body", builderBody.ToString())  
            .Replace("#OrdPrm", fileldPrm.ToString());  
    }  
    
    return fileContent.ToString();  
}

Let’s Work with the Front-End, AngularJS Controller-Generator.

In our front end, we also used the same mechanism that is used to generate the API Controller. The below method generates AngularJS Controller code.

public static dynamic GenerateNgController(List<vmColumn> tblColumns, string contentRootPath)  
{  
    TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderSub = new StringBuilder();  
    builderPrm.Clear();  
    builderSub.Clear();  
    
    string fileContent = string.Empty;  
    string queryPrm = string.Empty;  
    string submitPrm = string.Empty;  
    
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    string path = @"" + contentRootPath + "\\template\\AngularJS\\Controller.txt";  
    
    // Controller Name  
    string ctrlName = textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "Controller";  
    string serviceInjected = "'$scope', '$http'";  
    string srvParam = "$scope, $http";  
    string urlApiGet = "'/api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/GetAll'";  
    string url_GetByID = "'/api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/GetByID/' + parseInt(model.id)";  
    string url_Post = "'/api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/Save'";  
    string url_Put = "'/api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/UpdateByID/' + parseInt(model.id)";  
    string url_Delete = "'/api/" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(tableName.ToString())) + "/DeleteByID/' + parseInt(model.id)";  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#ControllerName", ctrlName.ToString())  
            .Replace("#ServiceInjected", serviceInjected.ToString())  
            .Replace("#SrvParam", srvParam.ToString())  
            .Replace("#UrlGet", urlApiGet.ToString())  
            .Replace("#Url_GetByID", url_GetByID.ToString())  
            .Replace("#Url_Post", url_Post.ToString())  
            .Replace("#Url_Put", url_Put.ToString())  
            .Replace("#Url_Delete", url_Delete.ToString());  
    }  
    
    return fileContent.ToString();  
}

HTML-Generator (Form)

Using the below method we have generated an HTML form that's embedded with an Angular tag.

public static dynamic GenerateForm(List<vmColumn> tblColumns, string contentRootPath)  
{  
    TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;  
    StringBuilder builderPrm = new StringBuilder();  
    StringBuilder builderSub = new StringBuilder();  
    builderPrm.Clear();  
    builderSub.Clear();  
    
    string fileContent = string.Empty;  
    string queryPrm = string.Empty;  
    string submitPrm = string.Empty;  
    
    string tableName = tblColumns[0].Tablename;  
    string tableSchema = tblColumns[0].TableSchema;  
    string path = @"" + contentRootPath + "\\template\\HtmlForm\\Form.txt";  
    
    // Form Name  
    string frmName = "name='frm" + tableName.ToString() + "' novalidate";  
    
    // Form Fields  
    foreach (var item in tblColumns)  
    {  
        // Parameter  
        builderPrm.AppendLine();  
        builderPrm.Append(" <div class='form-group'>");  
        builderPrm.AppendLine();  
        
        if (item.ColumnName.Contains("email") || item.ColumnName.Contains("Email"))  
        {  
            builderPrm.Append("  <label for='" + item.ColumnName + "' class='control-label'>" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(item.ColumnName)) + "</label>");  
            builderPrm.AppendLine();  
            builderPrm.Append("  <input type='email' class='form-control' ng-model='vmfrm." + item.ColumnName + "' name='" + item.ColumnName + "' required />");  
        }  
        else if (item.ColumnName.Contains("password") || item.ColumnName.Contains("Password"))  
        {  
            builderPrm.Append("  <label for='" + item.ColumnName + "' class='control-label'>" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(item.ColumnName)) + "</label>");  
            builderPrm.AppendLine();  
            builderPrm.Append("  <input type='password' class='form-control' ng-model='vmfrm." + item.ColumnName + "' name='" + item.ColumnName + "' required />");  
        }  
        else  
        {  
            builderPrm.Append("  <label for='" + item.ColumnName + "' class='control-label'>" + textInfo.ToTitleCase(Conversion.RemoveSpecialCharacters(item.ColumnName)) + "</label>");  
            builderPrm.AppendLine();  
            builderPrm.Append("  <input type='text' class='form-control' ng-model='vmfrm." + item.ColumnName + "' name='" + item.ColumnName + "' required />");  
        }  
        
        builderPrm.AppendLine();  
        builderPrm.Append(" </div>");  
    }  
    
    queryPrm = builderPrm.AppendLine().ToString();  
    
    // Form Submit  
    builderSub.Append(" <div class='form-group'>");  
    builderSub.AppendLine();  
    builderSub.Append("  <input type='submit' name='reset' value='Reset' ng-click='Reset()' />");  
    builderSub.AppendLine();  
    builderSub.Append("  <input type='submit' name='update' value='Update' ng-click='Update()' />");  
    builderSub.AppendLine();  
    builderSub.Append("  <input type='submit' name='submit' value='Save' ng-click='Save()' />");  
    builderSub.AppendLine();  
    builderSub.Append(" </div>");  
    
    submitPrm = builderSub.AppendLine().ToString();  
    
    using (StreamReader sr = new StreamReader(path, Encoding.UTF8))  
    {  
        fileContent = sr.ReadToEnd()  
            .Replace("#frmName", frmName.ToString())  
            .Replace("#frmGroup", queryPrm.ToString())  
            .Replace("#frmSubmit", submitPrm.ToString());  
    }  
    
    return fileContent.ToString();  
}

Generated Code

We have used multiple tabs to represent all the generated code. Below is our HTML section.

<div class="tab-struct custom-tab-2 mt-0">
    <ul role="tablist" class="nav nav-tabs" id="myTabs_15">
        <li class="active" role="presentation">
            <a data-toggle="tab" id="views_tab_1" role="tab" href="#views" aria-expanded="false">HTML Views</a>
        </li>
        <li role="presentation" class="">
            <a data-toggle="tab" id="angular_tab_1" role="tab" href="#angular" aria-expanded="false">AngularJS</a>
        </li>
        <li role="presentation" class="">
            <a data-toggle="tab" id="csharp_tab_1" role="tab" href="#csharp" aria-expanded="false">WebAPI</a>
        </li>
        <li role="presentation" class="">
            <a data-toggle="tab" id="model_tab_1" role="tab" href="#model" aria-expanded="false">Model</a>
        </li>
        <li class="" role="presentation">
            <a aria-expanded="true" data-toggle="tab" role="tab" id="sql_tab_1" href="#sql">SQL</a>
        </li>
    </ul>
    <div class="tab-content" id="myTabContent_15">
        <div id="views" class="tab-pane fade active in" role="tabpanel" style="max-height:450px; overflow-y: auto;">
            <pre class="pa-10" lang="html">
                <xmp id="genCodeVu"></xmp>
            </pre>
        </div>
        <div id="angular" class="tab-pane fade" role="tabpanel" style="max-height:450px; overflow-y: auto;">
            <pre class="pa-10" lang="sql">
                <xmp id="genCodeAngular"></xmp>
            </pre>
        </div>
        <div id="csharp" class="tab-pane fade" role="tabpanel" style="max-height:450px; overflow-y: auto;">
            <pre class="pa-10" lang="sql">
                <xmp id="genCodeAPI"></xmp>
            </pre>
        </div>
        <div id="model" class="tab-pane fade" role="tabpanel" style="max-height:450px; overflow-y: auto;">
            <pre class="pa-10" lang="cs">
                <xmp id="genCodeVm"></xmp>
            </pre>
        </div>
        <div id="sql" class="tab-pane fade" role="tabpanel" style="max-height:450px; overflow-y: auto;">
            <pre class="pa-10" lang="sql">
                <xmp id="genCodeSql"></xmp>
            </pre>
        </div>
    </div>
</div>

We have used pre-formatted & HTML Example Element tags in HTML to present the generated code.

<pre class="pa-10" lang="html">
    <xmp id="genCodeVu"></xmp>
</pre>

Here's the code generation frontend function that interacts with APIs, and then gets the generated content which is represented by writing the DOM in an HTML page.

$scope.generate = function () {
    $('.nav-tabs a[href="#views"]').tab('show');

    var rowGen = [];
    var elementIDSql = 'genCodeSql';
    var elementIDVm = 'genCodeVm';
    var elementIDVu = 'genCodeVu';
    var elementIDNg = 'genCodeAngular';
    var elementIDApi = 'genCodeAPI';

    if ($scope.collist.length > 0) {
        var models = "[" + JSON.stringify($scope.collist) + "]";

        $http({
            method: 'POST',
            url: '/api/Codegen/GenerateCode',
            data: models,
            dataType: "json",
            contentType: 'application/json; charset=utf-8'
        }).then(function (response) {

            $('#genCodeSql').text('');
            $('#genCodeVm').text('');
            $('#genCodeVu').text('');
            $('#genCodeAngular').text('');
            $('#genCodeAPI').text('');
            rowGen = response.data.spCollection;

            if (rowGen.length > 0) {
                for (var i = 0; i < rowGen.length; i++) {
                    // SP
                    if (i === 0) {
                        document.getElementById(elementIDSql).innerHTML += "--+++++++++ SET SP +++++++\r\n" + rowGen[i] + "\r\n";
                    } else if (i === 1) {
                        document.getElementById(elementIDSql).innerHTML += "--+++++++++ GET SP +++++++++\r\n" + rowGen[i] + "\r\n";
                    } else if (i === 2) {
                        document.getElementById(elementIDSql).innerHTML += "--+++++++++ PUT SP +++++++++\r\n" + rowGen[i] + "\r\n";
                    } else if (i === 3) {
                        document.getElementById(elementIDSql).innerHTML += "--+++++++++ DELETE SP +++++++\r\n" + rowGen[i] + "\r\n";
                    // VM
                    } else if (i === 4) {
                        document.getElementById(elementIDVm).innerHTML += "// +++++++++ MODEL PROPERTIES +++++++++\r\n" + rowGen[i] + "\r\n";
                    // VIEW
                    } else if (i === 5) {
                        document.getElementById(elementIDVu).innerHTML += "<!-- +++++++++ HTML FORM +++++++++ -->\r\n" + rowGen[i] + "\r\n";
                    // ANGULAR
                    } else if (i === 6) {
                        document.getElementById(elementIDNg).innerHTML += "// +++++++++ AngularJS Controller +++++++++\r\n" + rowGen[i] + "\r\n";
                    // API
                    } else if (i === 7) {
                        document.getElementById(elementIDApi).innerHTML += "// +++++++++ API Controller +++++++++\r\n" + rowGen[i] + "\r\n";
                    } else {
                        document.getElementById(elementIDSql).innerHTML += " Error !!";
                    }
                }
            }
        }, function (error) {
            console.log(error);
        });
    } else {
        rowGen = [];
        $('#genCodeSql').text('');
        $('#genCodeVm').text('');
        console.log("Please Choose a Column!!");
    }
};

Output

As you can see the final output is in the below screen.

Output

Source Code

I’ve uploaded the full source code to download/clone @github. Hope this will help.

4 Comments

Join the conversation! Your thoughts help the community grow.

Alpesh Maniya4y ago
Very good information. Do we have any integration for dropdown.
roll m5y ago
Very useful and clean code, fantastic
sai theja8y ago
Source code link ?
- Shashangka Shekhar8y ago
  Https://github.com/ShashangkaShekhar/Code-Generator