Checking for Update errors using the RowUpdated event (VB)
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub GridView1_RowUpdated(ByVal sender As Object, _
ByVal e As System.Web.UI.WebControls.GridViewUpdatedEventArgs)
If (Not IsDBNull(e.Exception)) Then
Me.lblErrorMessage.Text = e.Exception.Message
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1"
Runat="server"
DataSourceID="SqlDataSource1"
DataKeyNames="CustomerID"
AutoGenerateColumns="False"
AllowSorting="True"
AllowPaging="True"
AutoGenerateEditButton="true"
OnRowUpdated="GridView1_RowUpdated">
<PagerStyle HorizontalAlign="Center"></PagerStyle>
<PagerSettings Position="TopAndBottom"
FirstPageText="Go to the first page"
LastPageText="Go to the last page" Mode="NextPreviousFirstLast">
</PagerSettings>
<Columns>
<asp:BoundField ReadOnly="True" HeaderText="CustomerID" DataField="CustomerID"
SortExpression="CustomerID" Visible="False"></asp:BoundField>
<asp:HyperLinkField HeaderText="CompanyName"
DataNavigateUrlFields="CustomerID,Country" SortExpression="CompanyName"
DataNavigateUrlFormatString=
"http://www.yourServer.com/Customer.aspx?id={0}&country={1}"
DataTextField="CompanyName">
</asp:HyperLinkField>
<asp:BoundField HeaderText="ContactName" DataField="ContactName"
SortExpression="ContactName"></asp:BoundField>
<asp:BoundField HeaderText="ContactTitle" DataField="ContactTitle"
SortExpression="ContactTitle"></asp:BoundField>
<asp:BoundField HeaderText="Address" DataField="Address"
SortExpression="Address"></asp:BoundField>
<asp:BoundField HeaderText="City" DataField="City"
SortExpression="City"></asp:BoundField>
<asp:BoundField HeaderText="Region" NullDisplayText="N/A"
DataField="Region" SortExpression="Region"></asp:BoundField>
<asp:BoundField HeaderText="PostalCode" DataField="PostalCode"
SortExpression="PostalCode"></asp:BoundField>
<asp:BoundField HeaderText="Country" DataField="Country"
SortExpression="Country"></asp:BoundField>
<asp:BoundField HeaderText="Phone" DataField="Phone"
SortExpression="Phone"></asp:BoundField>
<asp:BoundField HeaderText="Fax" DataField="Fax"
SortExpression="Fax"></asp:BoundField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" Runat="server"
SelectCommand="SELECT * FROM [Customers]"
ConnectionString="<%$ ConnectionStrings:AppConnectionString1 %>"
DataSourceMode="DataSet"
UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName,
[ContactName] = @ContactName, [ContactTitle] = @ContactTitle,
[Address] = @Address, [City] = @City, [Region] = @Region,
[PostalCode] = @PostalCode, [Country] = @Country, [Phone] = @Phone,
[Fax] = @Fax WHERE [CustomerID] = @original_CustomerID">
<UpdateParameters>
<asp:Parameter Type="String" Name="CompanyName"></asp:Parameter>
<asp:Parameter Type="String" Name="ContactName"></asp:Parameter>
<asp:Parameter Type="String" Name="ContactTitle"></asp:Parameter>
<asp:Parameter Type="String" Name="Address"></asp:Parameter>
<asp:Parameter Type="String" Name="City"></asp:Parameter>
<asp:Parameter Type="String" Name="Region"></asp:Parameter>
<asp:Parameter Type="String" Name="PostalCode"></asp:Parameter>
<asp:Parameter Type="String" Name="Country"></asp:Parameter>
<asp:Parameter Type="String" Name="Phone"></asp:Parameter>
<asp:Parameter Type="String" Name="Fax"></asp:Parameter>
<asp:Parameter Type="String" Name="CustomerID"></asp:Parameter>
</UpdateParameters>
</asp:SqlDataSource>
<asp:Label ID="lblErrorMessage" runat="server" Text="Label"></asp:Label>
</div>
</form>
</body>
</html>
File: Web.config
<configuration>
<appSettings/>
<connectionStrings>
<add name="AppConnectionString1"
connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<compilation debug="true" strict="false" explicit="true">
<codeSubDirectories>
<add directoryName="VB"></add>
<add directoryName="CS"></add>
</codeSubDirectories>
</compilation>
<pages>
<namespaces>
<clear/>
<add namespace="System"/>
<add namespace="System.Collections"/>
<add namespace="System.Collections.Specialized"/>
<add namespace="System.Configuration"/>
<add namespace="System.Text"/>
<add namespace="System.Text.RegularExpressions"/>
<add namespace="System.Web"/>
<add namespace="System.Web.Caching"/>
<add namespace="System.Web.SessionState"/>
<add namespace="System.Web.Security"/>
<add namespace="System.Web.Profile"/>
<add namespace="System.Web.UI"/>
<add namespace="System.Web.UI.WebControls"/>
<add namespace="System.Web.UI.WebControls.WebParts"/>
<add namespace="System.Web.UI.HtmlControls"/>
</namespaces>
</pages>
<authentication mode="Windows"></authentication>
<identity impersonate="true"/>
</system.web>
</configuration>