How To Create An HTTP Trigger Azure Function App Using Visual Studio 2017

{  
   "userName": "[email protected]",  
   "password": "password",  
   "Employees": "{\r\n \"MethodName\": \"CheckMethod\",\r\n \"entities\": [],\r\n \"text\": \"testword\",\r\n \"isActive\": false\r\n}",  
   "IsCheck": "true"  
}

Now, I’ll create a class file with the name of CommonReturnType to read the input data.

Now, open the common return type class file.

and keep the JSON data content on the clipboard (copy input JSON data).

Go to Edit > Paste Special > Select Paste JSON as Classes.

Then, an auto-generated class will be retrieved as per the JSON data.

Next

Develop the code as per our requirements.

using System.Linq;  
using System.Net;  
using System.Net.Http;  
using System.Threading.Tasks;  
using Microsoft.Azure.WebJobs;  
using Microsoft.Azure.WebJobs.Extensions.Http;  
using Microsoft.Azure.WebJobs.Host;  
using Newtonsoft.Json;  

namespace FunctionApp1 
{  
    public static class Function1 
    {  
        [FunctionName("MyFirstFunction")]  
        public static async Task<HttpResponseMessage> Run(
            [HttpTrigger(AuthorizationLevel.Admin, "get", "post", Route = null)] HttpRequestMessage req, 
            TraceWriter log) 
        {  
            log.Info("C# HTTP trigger function processed a request.");  
            string jsonContent = await req.Content.ReadAsStringAsync();  
            
            if (jsonContent != "") 
            {  
                // De-serializing JSON data
                CommonReturnType fdata = JsonConvert.DeserializeObject<CommonReturnType>(jsonContent);  
                string inputMessageJSON = fdata.Employees;  
                Employees msg = JsonConvert.DeserializeObject<Employees>(inputMessageJSON);  
                
                // Process data
                if (msg.MethodName == "CheckMethod" && fdata.IsCheck == "true") 
                {  
                    string swin = msg.text;  
                    switch (swin.ToLower()) 
                    {  
                        case "something":  
                            msg.text = "How are you today";  
                            fdata.IsCheck = "true";  
                            break;  
                        
                        case "something1":  
                            msg.text = "Good Bye";  
                            fdata.IsCheck = "false";  
                            break;  
                        
                        default:  
                            msg.text = "Hi. How may I help you today..!";  
                            fdata.IsCheck = "true";  
                            break;  
                    }  
                    
                    fdata.Employees = JsonConvert.SerializeObject(msg, Formatting.Indented);  
                    return req.CreateResponse(HttpStatusCode.OK, fdata);  
                }  
            }  
            
            return req.CreateResponse(HttpStatusCode.BadRequest, "Please pass a name on the query string or in the request body");  
        }  
    }  
}  

Execute the code.

Test the below URL in the Postman App: http://localhost:7071/api/MyFirstFunction.

If you want to publish this Azure Function in the cloud, publish this code in the Azure cloud by using credentials and publishing files.

Azure URL Example

To execute this function app in Azure, you have to mention the secret key in the URL.

Example URL

http://mysite.azurewebsites.net/api/MyFirstFunction?code=MySecretCodehere

Happy coding.