จะใช้ Eval("ProductId") ใน ItemCommand เพื่อที่จะ insert ค่าลง database ยังไงครับ

	void myDataList_UpdateCommand(Object sender, DataListCommandEventArgs e)
	{
		//*** CategoryID ***//
		Label lblCateID = (Label)(e.Item.FindControl("lblCateID"));
		//*** Category ***//
		TextBox txtCategory = (TextBox)(e.Item.FindControl("txtCategory"));
		

		strSQL = "UPDATE category SET CategoryName = '" + txtCategory.Text + "' " +
		" WHERE CategoryID = " + lblCateID.Text + " ";
		objCmd = new OleDbCommand(strSQL, objConn);
		objCmd.ExecuteNonQuery();
		
        //*** If Select File Upload ***//
        HtmlInputFile filPicture = (HtmlInputFile)(e.Item.FindControl("filPicture"));
        String strFileName;
        if(filPicture.PostedFile.FileName != "")
		{
            strFileName = System.IO.Path.GetFileName(filPicture.Value);
            filPicture.PostedFile.SaveAs(Server.MapPath("images/" + strFileName));
            strSQL = "UPDATE category SET Picture = 'images/" + strFileName + "' " +
            " WHERE CategoryID = " + lblCateID.Text + " ";
            objCmd = new OleDbCommand(strSQL, objConn);
            objCmd.ExecuteNonQuery();
        }

		myDataList.EditItemIndex = -1;
		BindData();
	}

protected void dlProduct_ItemCommand(object source, DataListCommandEventArgs e)
        {
            TextBox Qty = new TextBox();
            Qty = (TextBox)e.Item.FindControl("txtqty");


            Label ProductIdLabel = new Label();
            ProductIdLabel = (Label)e.Item.FindControl("ProductIdLabel");
            

            Label ProductName = new Label();
            ProductName = (Label)e.Item.FindControl("ProductName");

            Label TotalPrice = new Label();
            TotalPrice = (Label)e.Item.FindControl("ProductPriceLabel");

            
       


            if (Qty != null)  // มี Textbox ชื่อนี้หรือไม่?
            {
                // ทำงานต่อไปตามต้องการ
                // ค่าของ TextBox ใช้ตามปกติ txt.Text

                string strconn = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
                SqlConnection conn = new SqlConnection(strconn);
                conn.Open();

                string commandtext = @"INSERT INTO Table1(Username,ProductId,ProductName,OrderDate,Qty,TotalPrice) VALUES (@Username,@ProductId,@ProductName,@OrderDate,@Qty,@TotalPrice)";
                SqlCommand com = new SqlCommand(commandtext, conn);
                com.Parameters.Add("@Username", SqlDbType.NVarChar).Value = Session["strUsername"];
                com.Parameters.Add("@ProductId", SqlDbType.Int).Value = ProductIdLabel;
                com.Parameters.Add("@ProductName", SqlDbType.NVarChar).Value = ProductName;
                com.Parameters.Add("@OrderDate", SqlDbType.DateTime).Value = DateTime.Now;
                com.Parameters.Add("@Qty", SqlDbType.Int).Value = Qty.Text.Trim();
                com.Parameters.Add("@TotalPrice", SqlDbType.Int).Value = TotalPrice;

                if (conn.State == ConnectionState.Open)
                { conn.Close(); }

                conn.Open();
                com.ExecuteNonQuery();
                conn.Close();
                Response.Redirect("index.aspx");


            }

        }