ASP.NET Tutorial/LINQ/LINQ Entities — различия между версиями

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Текущая версия на 11:58, 26 мая 2010

Creating LINQ to SQL Entities

File: ~\App_Code\Product.cs
using System;
using System.Data.Linq.Mapping;
[Table]
public class Product
{
    [Column(IsPrimaryKey=true, IsDbGenerated=true)]
    public int Id { get; set; }
    [Column]
    public string Title { get; set; }
    [Column]
    public string Director { get; set; }
    [Column]
    public DateTime DateReleased { get; set; }
    [Column]
    public decimal Totals { get; set; }
}

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Configuration" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Data.Linq" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void btnSearch_Click(object sender, EventArgs e)
    {
        string conString = WebConfigurationManager.ConnectionStrings["Products"] .ConnectionString;
        DataContext db = new DataContext(conString);
        var tProduct = db.GetTable<Product>();
        grdProducts.DataSource = tProduct.Where( m => m.Director.Contains(txtDirector.Text) );
        grdProducts.DataBind();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:Label
        id="lblDirector"
        Text="Director:"
        AssociatedControlID="txtDirector"
        Runat="server" />
    <asp:TextBox
        id="txtDirector"
        Runat="server" />
    <asp:Button
        id="btnSearch"
        Text="Search"
        OnClick="btnSearch_Click"
        Runat="Server" />

    <asp:GridView
        id="grdProducts"
        Runat="server" />
    </div>
    </form>
</body>
</html>

File: Web.config
<configuration>
  <connectionStrings>
    <add name="Products" 
         connectionString="Data Source=.\SQLEXPRESS;
         AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />
  </connectionStrings>
</configuration>
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/LINQ/LINQ_Entities&oldid=3106»