Using Multiple ResultSets in a single DbDataReader : DbDataReader « ADO.net Database « ASP.NET Tutorial





<%@ Page Language="C#" 
         AutoEventWireup="true" 
         CodeFile="Default.aspx.cs" 
         Inherits="MultipleResultSets" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
   <title>Using Multiple ResultSets in a single DbDataReader</title>
</head>
<body>
   <form id="form1" runat="server">
      <div id="container">
      <asp:GridView ID="grdBooks" runat="server" />
      <h2>Authors</h2>
      <asp:GridView ID="grdAuthors" runat="server" />
      
         <asp:Label ID="labMsg" runat="server" />
         
      </div>
   </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;
using System.Configuration;

public partial class MultipleResultSets : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
      string connString = ConfigurationManager.ConnectionStrings["Northwind"].ConnectionString;

      SqlConnection conn = null;
      SqlDataReader reader = null;

      try
      {
         conn = new SqlConnection(connString);
         conn.Open();

         string sql = "SELECT * FROM Products; SELECT * FROM Customers;";
         SqlCommand cmd = new SqlCommand(sql, conn);

         reader = cmd.ExecuteReader();

         grdAuthors.DataSource = reader;
         grdAuthors.DataBind();

         reader.NextResult();

         grdBooks.DataSource = reader;
         grdBooks.DataBind();


      }
      catch (Exception ex)
      {
          labMsg.Text = "Error occurred accessing the database";
          labMsg.Text += "<br/>" + ex.Message;
      }
      finally
      {
         if (reader != null) reader.Close();
         if (conn != null) conn.Close();
      }

    }
}










18.33.DbDataReader
18.33.1.Using Multiple ResultSets in a single DbDataReader