Mega Code Archive
Prevent overlapping edits
<![CDATA[
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="MyPage" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Record Editor</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="lstProduct"
runat="server"
AutoPostBack="True"
Width="300px"
DataSourceID="sourceProducts"
DataTextField="ProductName"
DataValueField="ProductID">
</asp:DropDownList>
<br />
<table>
<tr>
<td>
<asp:DetailsView ID="DetailsView1"
runat="server"
DataSourceID="sourceProductDetails"
Height="50px"
Width="200px"
AutoGenerateEditButton="True">
</asp:DetailsView>
</td>
<td style="width: 190px">
</td>
</tr>
</table>
<asp:SqlDataSource ID="sourceProducts"
runat="server"
ProviderName="System.Data.SqlClient"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT ProductName, ProductID FROM Products"/>
<asp:SqlDataSource ID="sourceProductDetails"
runat="server"
ProviderName="System.Data.SqlClient"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT ProductID, ProductName, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued FROM Products WHERE ProductID=@ProductID"
UpdateCommand="UPDATE Products SET ProductName=@ProductName, UnitPrice=@UnitPrice, UnitsInStock=@UnitsInStock, UnitsOnOrder=@UnitsOnOrder, ReorderLevel=@ReorderLevel, Discontinued=@Discontinued WHERE ProductID=@ProductID AND ProductName=@original_ProductName AND UnitPrice=@original_UnitPrice AND UnitsInStock=@original_UnitsInStock AND UnitsOnOrder=@original_UnitsOnOrder AND ReorderLevel=@original_ReorderLevel AND Discontinued=@original_Discontinued"
OldValuesParameterFormatString="original_{0}" ConflictDetection="CompareAllValues" OnUpdated="sourceProductDetails_Updated">
<SelectParameters>
<asp:ControlParameter ControlID="lstProduct" Name="ProductID" PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:Label ID="lblInfo" runat="server" EnableViewState="False"></asp:Label>
</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;
public partial class MyPage : System.Web.UI.Page
{
protected void sourceProductDetails_Updated(object sender, SqlDataSourceStatusEventArgs e)
{
if (e.AffectedRows == 0)
{
lblInfo.Text = "No update was performed. A concurrency error is likely, or the command is incorrectly written.";
}
else
{
lblInfo.Text = "Record successfully updated.";
}
}
}
File: Web.config
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="Northwind" connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI"/>
</connectionStrings>
</configuration>
]]>