How to insert data into database from C# visual studio

without using windows form.

 

Please help me.

 

 source code:

 

using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SqlTest_CSharp
{
class Program
{
static void Main(string[] args)
{
// Create the connection to the resource!
// This is the connection, that is established and
// will be available throughout this block.
using (SqlConnection conn = new SqlConnection())
{
// Create the connectionString
// Trusted_Connection is used to denote the connection uses Windows Authentication
conn.ConnectionString = "Server=[DESKTOP-T83UEBM];Database=[anurag];Trusted_Connection=true";
conn.Open();
// Create the command
SqlCommand command = new SqlCommand("SELECT * FROM customers WHERE firstname =kevin", conn);
// Add the parameters.
command.Parameters.Add(new SqlParameter("kevin", 1));

/* Get the rows and display on the screen!
* This section of the code has the basic code
* that will display the content from the Database Table
* on the screen using an SqlDataReader. */

using (SqlDataReader reader = command.ExecuteReader())
{
Console.WriteLine("accountid\t firstname\t \tlastname\t \t nickname\t");
while (reader.Read())
{
Console.WriteLine(String.Format("{0} \t | {1} \t | {2} \t | {3}",
reader[0], reader[1], reader[2], reader[3]));
}
}
Console.WriteLine("Data displayed! Now press enter to move to the next section!");
Console.ReadLine();
Console.Clear();

/* Above code was used to display the data from the Database table!
* This following section explains the key features to use
* to add the data to the table. This is an example of another
* SQL Command (INSERT INTO), this will teach the usage of parameters and connection.*/

Console.WriteLine("INSERT INTO command");

// Create the command, to insert the data into the Table!
// this is a simple INSERT INTO command!

SqlCommand insertCommand = new SqlCommand("INSERT INTO TableName (accountid, firstname, lastname, nickname) VALUES (@0, @1, @2, @3)", conn);

// In the command, there are some parameters denoted by @, you can
// change their value on a condition, in my code they're hardcoded.

insertCommand.Parameters.Add(new SqlParameter("0", 82231));
insertCommand.Parameters.Add(new SqlParameter("1", "Anurag"));
insertCommand.Parameters.Add(new SqlParameter("2", "G"));
insertCommand.Parameters.Add(new SqlParameter("3", "anu"));

// Execute the command, and print the values of the columns affected through
// the command executed.

Console.WriteLine("Commands executed! Total rows affected are " + insertCommand.ExecuteNonQuery());
Console.WriteLine("Done! Press enter to move to the next step");
Console.ReadLine();
Console.Clear();

/* In this section there is an example of the Exception case
* Thrown by the SQL Server, that is provided by SqlException
* Using that class object, we can get the error thrown by SQL Server.
* In my code, I am simply displaying the error! */
Console.WriteLine("Now the error trial!");

// try block
try
{
// Create the command to execute! With the wrong name of the table (Depends on your Database tables)
SqlCommand errorCommand = new SqlCommand("SELECT * FROM customers", conn);
// Execute the command, here the error will pop up!
// But since we're catching the code block's errors, it will be displayed inside the console.
errorCommand.ExecuteNonQuery();
}
// catch block
catch (SqlException er)
{
// Since there is no such column as someErrorColumn (Depends on your Database tables)
// SQL Server will throw an error.
Console.WriteLine("There was an error reported by SQL Server, " + er.Message);
}
}
// Final step, close the resources flush dispose them. ReadLine to prevent the console from closing.
Console.ReadLine();
}
}
}