DetailsViewInsertedEventHandler Delegado
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Representa el método que controla el evento ItemInserted de un control DetailsView.
public delegate void DetailsViewInsertedEventHandler(System::Object ^ sender, DetailsViewInsertedEventArgs ^ e);public delegate void DetailsViewInsertedEventHandler(object sender, DetailsViewInsertedEventArgs e);type DetailsViewInsertedEventHandler = delegate of obj * DetailsViewInsertedEventArgs -> unitPublic Delegate Sub DetailsViewInsertedEventHandler(sender As Object, e As DetailsViewInsertedEventArgs)Parámetros
- sender
- Object
Origen del evento.
Objeto DetailsViewInsertedEventArgs que contiene los datos del evento.
Ejemplos
En el ejemplo de código siguiente se muestra cómo agregar mediante programación un DetailsViewInsertedEventHandler delegado al ItemInserted evento de un DetailsView control.
<%@ 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 Page_Load(Object sender, EventArgs e)
{
// Create a new DetailsView object.
DetailsView customerDetailsView = new DetailsView();
// Set the DetailsView object's properties.
customerDetailsView.ID = "CustomerDetailsView";
customerDetailsView.DataSourceID = "DetailsViewSource";
customerDetailsView.AutoGenerateRows = true;
customerDetailsView.AutoGenerateInsertButton = true;
customerDetailsView.AllowPaging = true;
customerDetailsView.DataKeyNames = new String[1] { "CustomerID" };
// Programmatically register the event-handling method
// for the ItemInserted event of a DetailsView control.
customerDetailsView.ItemInserted
+= new DetailsViewInsertedEventHandler(
this.CustomerDetailsView_ItemInserted);
// Add the DetailsView object to the Controls collection
// of the PlaceHolder control.
DetailsViewPlaceHolder.Controls.Add(customerDetailsView);
}
void CustomerDetailsView_ItemInserted(Object sender,
DetailsViewInsertedEventArgs e)
{
// Use the Exception property to determine whether an exception
// occurred during the insert operation.
if (e.Exception == null)
{
// Use the Values property to get the value entered by
// the user for the CompanyName field.
String name = e.Values["CompanyName"].ToString();
// Display a confirmation message.
MessageLabel.Text = name + " added successfully. ";
}
else
{
// Insert the code to handle the exception.
MessageLabel.Text = e.Exception.Message;
// Use the ExceptionHandled property to indicate that the
// exception is already handled.
e.ExceptionHandled = true;
// When an exception occurs, keep the DetailsView
// control in insert mode.
e.KeepInInsertMode = true;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertedEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewInsertedEventHandler Example</h3>
<!-- Use a PlaceHolder control as the container for the -->
<!-- dynamically generated DetailsView control. -->
<asp:PlaceHolder id="DetailsViewPlaceHolder"
runat="server"/>
<br/><br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- 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="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName],
[Address], [City], [PostalCode], [Country])
VALUES (@CustomerID, @CompanyName, @Address, @City,
@PostalCode, @Country)"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Create a new DetailsView object.
Dim customerDetailsView As New DetailsView()
' Set the DetailsView object's properties.
customerDetailsView.ID = "CustomerDetailsView"
customerDetailsView.DataSourceID = "DetailsViewSource"
customerDetailsView.AutoGenerateRows = True
customerDetailsView.AutoGenerateInsertButton = True
customerDetailsView.AllowPaging = true
Dim keyArray() As String = {"CustomerID"}
customerDetailsView.DataKeyNames = keyArray
' Programmatically register the event-handling method
' for the ItemInserted event of a DetailsView control.
AddHandler customerDetailsView.ItemInserted, _
AddressOf CustomerDetailsView_ItemInserted
' Add the DetailsView object to the Controls collection
' of the PlaceHolder control.
DetailsViewPlaceHolder.Controls.Add(customerDetailsView)
End Sub
Sub CustomerDetailsView_ItemInserted(ByVal sender As Object, _
ByVal e As DetailsViewInsertedEventArgs)
' Use the Exception property to determine whether an exception
' occurred during the insert operation.
If e.Exception Is Nothing Then
' Use the Values property to get the value entered by
' the user for the CompanyName field.
Dim name As String = e.Values("CompanyName").ToString()
' Display a confirmation message.
MessageLabel.Text = name & " added successfully. "
Else
' Insert the code to handle the exception.
MessageLabel.Text = e.Exception.Message
' Use the ExceptionHandled property to indicate that the
' exception is already handled.
e.ExceptionHandled = True
' When an exception occurs, keep the DetailsView
' control in insert mode.
e.KeepInInsertMode = True
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertedEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewInsertedEventHandler Example</h3>
<!-- Use a PlaceHolder control as the container for the -->
<!-- dynamically generated DetailsView control. -->
<asp:PlaceHolder id="DetailsViewPlaceHolder"
runat="server"/>
<br/><br/>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- 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="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName],
[Address], [City], [PostalCode], [Country])
VALUES (@CustomerID, @CompanyName, @Address, @City,
@PostalCode, @Country)"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
En el ejemplo de código siguiente se muestra cómo agregar declarativamente un DetailsViewInsertedEventHandler delegado al ItemInserted evento de un DetailsView control.
<%@ 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 CustomerDetailsView_ItemInserted(Object sender, DetailsViewInsertedEventArgs e)
{
// Use the Exception property to determine whether an exception
// occurred during the insert operation.
if (e.Exception == null)
{
// Use the Values property to get the value entered by
// the user for the CompanyName field.
String name = e.Values["CompanyName"].ToString();
// Display a confirmation message.
MessageLabel.Text = name + " added successfully. ";
}
else
{
// Insert the code to handle the exception.
MessageLabel.Text = e.Exception.Message;
// Use the ExceptionHandled property to indicate that the
// exception is already handled.
e.ExceptionHandled = true;
// When an exception occurs, keep the DetailsView
// control in insert mode.
e.KeepInInsertMode = true;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertedEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewInsertedEventHandler Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogenerateinsertbutton="true"
autogeneraterows="true"
allowpaging="true"
oniteminserted="CustomerDetailsView_ItemInserted"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- 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="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName],
[Address], [City], [PostalCode], [Country])
VALUES (@CustomerID, @CompanyName, @Address, @City,
@PostalCode, @Country)"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ Page language="VB" autoeventwireup="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub CustomerDetailsView_ItemInserted(ByVal sender As Object, _
ByVal e As DetailsViewInsertedEventArgs) _
Handles CustomerDetailsView.ItemInserted
' Use the Exception property to determine whether an exception
' occurred during the insert operation.
If e.Exception Is Nothing Then
' Use the Values property to get the value entered by
' the user for the CompanyName field.
Dim name As String = e.Values("CompanyName").ToString()
' Display a confirmation message.
MessageLabel.Text = name & " added successfully. "
Else
' Insert the code to handle the exception.
MessageLabel.Text = e.Exception.Message
' Use the ExceptionHandled property to indicate that the
' exception is already handled.
e.ExceptionHandled = True
' When an exception occurs, keep the DetailsView
' control in insert mode.
e.KeepInInsertMode = True
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewInsertedEventHandler Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewInsertedEventHandler Example</h3>
<asp:detailsview id="CustomerDetailsView"
datasourceid="DetailsViewSource"
datakeynames="CustomerID"
autogenerateinsertbutton="true"
autogeneraterows="true"
allowpaging="true"
oniteminserted="CustomerDetailsView_ItemInserted"
runat="server">
<fieldheaderstyle backcolor="Navy"
forecolor="White"/>
</asp:detailsview>
<asp:label id="MessageLabel"
forecolor="Red"
runat="server"/>
<!-- 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="DetailsViewSource"
selectcommand="Select [CustomerID], [CompanyName], [Address],
[City], [PostalCode], [Country] From [Customers]"
insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName],
[Address], [City], [PostalCode], [Country])
VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
Comentarios
El DetailsView control genera el ItemInserted evento cuando se hace clic en un botón Insertar (un botón con su CommandName propiedad establecida en "Insertar") dentro del control, pero después de que el DetailsView control inserte el registro. Esto le permite proporcionar un controlador de eventos que realice una rutina personalizada, como comprobar los resultados de una operación de inserción, siempre que se produzca este evento.
Cuando se crea un delegado DetailsViewInsertedEventHandler, se identifica el método que controlará el evento. Para asociar el evento al controlador, se debe agregar una instancia del delegado al evento. Siempre que se produce el evento, se llama a su controlador, a menos que se quite el delegado. Para obtener más información sobre los delegados del controlador de eventos, consulte Control y generación de eventos.
Métodos de extensión
| GetMethodInfo(Delegate) |
Obtiene un objeto que representa el método representado por el delegado especificado. |
Se aplica a
Consulte también
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