GridViewDeleteEventArgs.RowIndex Eigenschap
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Hiermee haalt u de index op van de rij die wordt verwijderd.
public:
property int RowIndex { int get(); };public int RowIndex { get; }member this.RowIndex : intPublic ReadOnly Property RowIndex As IntegerWaarde van eigenschap
De op nul gebaseerde index van de rij die wordt verwijderd.
Voorbeelden
In het volgende voorbeeld ziet u hoe u de RowIndex eigenschap gebruikt om de index van de rij te bepalen die u wilt verwijderen.
<%@ Page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void CustomersGridView_RowDeleting(Object sender, GridViewDeleteEventArgs e)
{
// Get the country/region of the record being deleted.
GridViewRow row = CustomersGridView.Rows[e.RowIndex];
String region = row.Cells[6].Text;
// Cancel the delete operation if the country/region is "USA".
if(region == "USA")
{
e.Cancel = true;
Message.Text = "You cannot delete a record from " + region + ".";
}
}
void CustomersGridView_RowDeleted(Object sender, GridViewDeletedEventArgs e)
{
if (e.Exception == null)
{
// The delete operation succeeded. Clear the message label.
Message.Text = "";
}
else
{
// The delete operation failed. Display an error message.
Message.Text = "An error occurred during the delete operation. " +
e.AffectedRows.ToString() + " rows deleted.";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridViewDeleteEventArgs RowIndex Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewDeleteEventArgs RowIndex Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
allowpaging="true"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogeneratedeletebutton="true"
datakeynames="CustomerID"
onrowdeleted="CustomersGridView_RowDeleted"
onrowdeleting="CustomersGridView_RowDeleting"
runat="server">
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="CustomersSqlDataSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
deletecommand="Delete from Customers where CustomerID = @CustomerID"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server">
</asp:sqldatasource>
</form>
</body>
</html>
<%@ 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">
Sub CustomersGridView_RowDeleting(ByVal sender As Object, ByVal e As GridViewDeleteEventArgs)
' Get the country/region of the record being deleted.
Dim row As GridViewRow = CustomersGridView.Rows(e.RowIndex)
Dim region As String = row.Cells(6).Text
' Cancel the delete operation if the country/region is "USA".
If region = "USA" Then
e.Cancel = True
Message.Text = "You cannot delete a record from " & region & "."
End If
End Sub
Sub CustomersGridView_RowDeleted(ByVal sender As Object, ByVal e As GridViewDeletedEventArgs)
If e.Exception Is Nothing Then
' The delete operation succeeded. Clear the message label.
Message.Text = ""
Else
' The delete operation failed. Display an error message.
Message.Text = "An error occurred during the delete operation. " & _
e.AffectedRows.ToString() & " rows deleted."
e.ExceptionHandled = true
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>GridViewDeleteEventArgs RowIndex Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>GridViewDeleteEventArgs RowIndex Example</h3>
<asp:label id="Message"
forecolor="Red"
runat="server"/>
<br/>
<asp:gridview id="CustomersGridView"
allowpaging="true"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="true"
autogeneratedeletebutton="true"
datakeynames="CustomerID"
onrowdeleted="CustomersGridView_RowDeleted"
onrowdeleting="CustomersGridView_RowDeleting"
runat="server">
</asp:gridview>
<!-- This example uses Microsoft SQL Server and connects -->
<!-- to the Northwind sample database. Use an ASP.NET -->
<!-- expression to retrieve the connection string value -->
<!-- from the Web.config file. -->
<asp:sqldatasource id="CustomersSqlDataSource"
selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
deletecommand="Delete from Customers where CustomerID = @CustomerID"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server">
</asp:sqldatasource>
</form>
</body>
</html>
Opmerkingen
De rijindex wordt vaak gebruikt om de opgegeven rij op te halen uit de Rows verzameling van het GridView besturingselement. Vervolgens hebt u toegang tot de eigenschappen van de rij.
