Question

I am trying to do following Insert Command .But it is not working neither showing any exception. Can anybody tell me where I am doing wrong thing?

using System;
using System.Data;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Security.Principal;

public partial class StoredProcedures
{
   [Microsoft.SqlServer.Server.SqlProcedure]
   public static void USP_tempSP()
   {   
       DataTable objDataTable = new DataTable();
       using (SqlConnection objConn = new SqlConnection("context connection=true"))
       {
           objConn.Open();
           SqlCommand objCmd = new SqlCommand();
           objCmd.CommandType = CommandType.Text;

           objCmd.Connection = objConn;
           objCmd.CommandText = "select * from temp"; 
           /*table Structure
            *CREATE TABLE [dbo].[temp]([empname] [varchar](20)  NULL,[createdon] [datetime] NULL,[emp_id] [varchar](4) NULL
           ) 
           */
           SqlDataAdapter objDataAdapter = new SqlDataAdapter(objCmd.CommandText, objConn);
           objDataAdapter.Fill(objDataTable);

           SqlCommand objCmd1 = new SqlCommand();
           objCmd1.CommandType = CommandType.Text;
           objCmd1.UpdatedRowSource = UpdateRowSource.None;
           objCmd.CommandText = "Insert into tempCopy " +
                               " values(@empname,@createdon)";
           /*table Structure
            *CREATE TABLE [dbo].[tempCopy]([empname] [varchar](20)  NULL,[createdon] [datetime] NULL
            ) 
           */
           objCmd.Parameters.Add("@empname", SqlDbType.VarChar, 20, objDataTable.Columns["empname"].ColumnName);
           objCmd.Parameters.Add("@createdon", SqlDbType.DateTime, 8, objDataTable.Columns["createdon"].ColumnName);

           SqlDataAdapter adpt = new SqlDataAdapter();
           adpt.InsertCommand = objCmd;
           adpt.UpdateBatchSize = objDataTable.Rows.Count;
           try
           {
               int recordsInserted = adpt.Update(objDataTable);
           }
           catch(Exception ex)
           {
               //
           }

           objConn.Close();
        }
    }
}

Answer 1

I really think this is because you are using the update method on an table which is tracking it’s own changes. The problem is that nothing has changed. Set AcceptChangesDuringFill = false so that the rows are marked as added to the table.

       objConn.Open();
       /* This doesn't really do anything.
       SqlCommand objCmd = new SqlCommand();
       objCmd.CommandType = CommandType.Text;

       objCmd.Connection = objConn;
       objCmd.CommandText = "select * from temp"; */
       /*table Structure
        *CREATE TABLE [dbo].[temp]([empname] [varchar](20)  NULL,[createdon] [datetime] NULL,[emp_id] [varchar](4) NULL
       ) 
       */
       SqlDataAdapter objDataAdapter = new SqlDataAdapter("select * from temp", objConn);
       //Make sure we don't mark the new rows as unchanged
       objDataAdapter.AcceptChangesDuringFill = false;
       objDataAdapter.Fill(objDataTable);

       SqlCommand objCmd1 = new SqlCommand();
       objCmd1.CommandType = CommandType.Text;
       objCmd1.UpdatedRowSource = UpdateRowSource.None;
       //This is supposed to be objCmd1 !!
       objCmd1.CommandText = "Insert into tempCopy " +
                           " values(@empname,@createdon)";
       /*table Structure
        *CREATE TABLE [dbo].[tempCopy]([empname] [varchar](20)  NULL,[createdon] [datetime] NULL
        ) 
       */
       //This is supposed to be objCmd1 !!
       objCmd1.Parameters.Add("@empname", SqlDbType.VarChar, 20, objDataTable.Columns["empname"].ColumnName);
       objCmd1.Parameters.Add("@createdon", SqlDbType.DateTime, 8, objDataTable.Columns["createdon"].ColumnName);

       SqlDataAdapter adpt = new SqlDataAdapter();
       //This is supposed to be objCmd1 !!
       adpt.InsertCommand = objCmd1;
       adpt.UpdateBatchSize = objDataTable.Rows.Count;
       try
       {
           int recordsInserted = adpt.Update(objDataTable);
       }
       catch(Exception ex)
       {
           //
       }

       objConn.Close();

I think this should work, you need to be more careful with your variable naming. objCmd is fairly meaningless. If the command has been cmdSelectData and cmdInsertData it would have been much clearer. Also pretty much everything is an object so obj just clutters up the code.