GridViewDeleteEventArgs.RowIndex Propriedade
Definição
Importante
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Obtém o índice da linha que está sendo excluída.
public:
property int RowIndex { int get(); };public int RowIndex { get; }member this.RowIndex : intPublic ReadOnly Property RowIndex As IntegerValor da propriedade
O índice baseado em zero da linha que está sendo excluída.
Exemplos
O exemplo a seguir mostra como usar a RowIndex propriedade para determinar o índice da linha a ser excluída.
<%@ 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>
Comentários
O índice de linha é frequentemente usado para recuperar a linha especificada da Rows coleção do GridView controle. Em seguida, você pode acessar as propriedades da linha.