the data is not updated it is going to save function

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C#3.5

Hi all,

i debug my code,i need update the data.that time the data is not updated.it is going to save function..pls help.
This is my code;

private void btnAdd_Click(object sender, EventArgs e)
       {

           if (txtUserID.Text.Trim() == string.Empty)
           {
               MessageBox.Show("Please Enter The UserID.!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
               return;
           }

           if (txtUserName.Text.Trim() == string.Empty)
           {
               MessageBox.Show("Please Enter The UserName.!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
               return;
           }




           SqlDataAdapter da = new SqlDataAdapter("Select * From Users ", ConfigurationSettings.AppSettings["TrafficDB"]);
           DataSet ds = new DataSet("MastData");
           da.FillSchema(ds, SchemaType.Source, "Users");
           da.Fill(ds, "Users");
           DataTable dt;
           dt = ds.Tables["Users"];

           DataRow drCurrent;
           try
           {
               if (Convert.ToInt32(txtUserID.Tag.ToString()) == 0)
                   txtUserID.Tag = 0;
           }
           catch (System.NullReferenceException ex)
           {

               txtUserID.Tag = 0;
           }


           drCurrent = dt.Rows.Find(Convert.ToInt32(txtUserID.Tag.ToString()));
           if (drCurrent != null)
           {


               drCurrent.BeginEdit();
               drCurrent["UserId"] = txtUserID.Text.Trim();
               drCurrent["UserName"] = txtUserName.Text.Trim();
               drCurrent["FullControl"] = Convert.ToByte(chkboxFullcontrol.CheckState);

               drCurrent["IntAdd"] = Convert.ToByte(chkboxSave.CheckState);

               drCurrent["IntDelete"] = Convert.ToByte(chkboxDelete.CheckState);

               drCurrent["Modify"] = Convert.ToByte(chkboxUpdate.CheckState);

               drCurrent["Download"] = Convert.ToByte(chkboxDownload.CheckState);

               drCurrent["IntPrint"] = Convert.ToByte(chkboxPrint.CheckState);
               drCurrent["DateCreated"] = DateTime.Today;
               drCurrent["Status"] = 1;
               drCurrent.EndEdit();
               SqlCommandBuilder objCommandBuilder = new SqlCommandBuilder(da);
               da.Update(ds, "Users");
               MessageBox.Show("Record updated successfully", "Confirmation", MessageBoxButtons.OK, MessageBoxIcon.Information);

               fnFillTreeView();
               fnClearEntryFields();
           }
           else
           {
               drCurrent = dt.NewRow();
               drCurrent["UserId"] = txtUserID.Text.Trim();
               drCurrent["UserName"] = txtUserName.Text.Trim();

               drCurrent["IntAdd"] = Convert.ToByte(chkboxSave.CheckState);
               drCurrent["FullControl"] = Convert.ToByte(chkboxFullcontrol.CheckState);

               drCurrent["IntDelete"] = Convert.ToByte(chkboxDelete.CheckState);

               drCurrent["Modify"] = Convert.ToByte(chkboxUpdate.CheckState);

               drCurrent["Download"] = Convert.ToByte(chkboxDownload.CheckState);

               drCurrent["IntPrint"] = Convert.ToByte(chkboxPrint.CheckState);
               drCurrent["DateCreated"] = DateTime.Today;
               drCurrent["Status"] = 1;

               dt.Rows.Add(drCurrent);
               SqlCommandBuilder objCommandBuilder = new SqlCommandBuilder(da);
               da.Update(ds, "Users");
               MessageBox.Show("Record saved successfully", "Confirmation", MessageBoxButtons.OK, MessageBoxIcon.Information);
               fnFillTreeView();
               fnClearEntryFields();
           }

the data is directly go to save function.how to solve this problem..

[edit]Code block added - OriginalGriff[/edit]