Cannot insert the value NULL into column 'employeeid', table 'training.dbo.employee';

[sandeepreddy21]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
 
 
 
public partial class add : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
 
    }
    protected void btnadd_Click(object sender, EventArgs e)
    {
        int result = 0;
        SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["sqlcon"]);
        SqlCommand cmd = new SqlCommand("insertemployee", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add("@employeename", SqlDbType.NVarChar, 50).Value = ename.Text.Trim();
        cmd.Parameters.Add("@employeecourse", SqlDbType.NVarChar, 50).Value = ecourse.Text.Trim();
        con.Open();
        result = cmd.ExecuteNonQuery();
            con.Close();
            if (result > 0)
                Response.Write("employees are added");
            else
                Response.Write("insertion in problems");
 
 
    }
}
 
 
MY STOREPROCEDURES IS THIS
USE [training]
GO
/****** Object:  StoredProcedure [dbo].[insertemployee]    Script Date: 11/28/2012 16:40:07 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
 
ALTER PROCEDURE [dbo].[insertemployee](@employeename nvarchar(50),@employeecourse nvarchar(50))
AS
BEGIN
INSERT INTO [employee]([employeename],[employeecourse])
 
VALUES
(@employeename,@employeecourse)
 
 
END

[Rabbit]

That is a very straight forward error. The employeeid field in the table training.dbo.employee can not be null.