Mega Code Archive
Use Linq-to-DataSets to query against (typed) DataTables and DataSets using the LINQ syntax
<![CDATA[
<%@ Page Language="C#"
AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="Default" %>
<!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 runat="server">
<title>Linq-to-DataSets</title>
</head>
<body>
<form id="form1" runat="server">
<div id="pageContent">
<asp:Button ID="Button1" runat="server" Text="First 10 Days of Jan98" onclick="Button1_Click" />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using System.Linq;
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.Xml.Linq;
public partial class Default : System.Web.UI.Page
{
protected void Button1_Click(object sender, EventArgs e)
{
string connString = "SERVER=(local);DATABASE=northwind;Trusted_Connection=yes;";
string cmd = "SELECT * FROM customers;SELECT * FROM orders";
SqlDataAdapter adapter = new SqlDataAdapter(cmd, connString);
DataSet ds = new DataSet();
adapter.Fill(ds);
var customers = ds.Tables[0].AsEnumerable();
var orders = ds.Tables[1].AsEnumerable();
var data = from o in orders
join c in customers
on o.Field<string>("CustomerID") equals c.Field<string>("CustomerID")
where o.Field<DateTime>("OrderDate").Year == 1998 &&
o.Field<DateTime>("OrderDate").Month == 1 &&
o.Field<DateTime>("OrderDate").Day < 10
select new {OrderID=o.Field<int>("OrderID"),
Company=c.Field<string>("CompanyName")};
GridView1.DataSource = data;
GridView1.DataBind();
}
}
]]>