DetailsViewCommandEventArgs Clase
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.
Proporciona datos para el evento ItemCommand.
public ref class DetailsViewCommandEventArgs : System::Web::UI::WebControls::CommandEventArgspublic class DetailsViewCommandEventArgs : System.Web.UI.WebControls.CommandEventArgstype DetailsViewCommandEventArgs = class
inherit CommandEventArgsPublic Class DetailsViewCommandEventArgs
Inherits CommandEventArgs- Herencia
Ejemplos
En el ejemplo de código siguiente se muestra cómo usar el DetailsViewCommandEventArgs objeto pasado al controlador de eventos para el ItemCommand evento para determinar el nombre de comando del botón en el que ha hecho clic el usuario. En este ejemplo se usa el modelo de codificación de un solo archivo.
<%@ 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 ItemDetailsView_ItemCommand(Object sender,
DetailsViewCommandEventArgs e)
{
// Use the CommandName property to determine which button
// was clicked.
if (e.CommandName == "Add")
{
// Add the customer to the customer list.
// Get the row that contains the company name. In this
// example, the company name is in the second row (index 1)
// of the DetailsView control.
DetailsViewRow row = ItemDetailsView.Rows[1];
// Get the company's name from the appropriate cell.
// In this example, the company name is in the second cell
// (index 1) of the row.
String name = row.Cells[1].Text;
// Create a ListItem object with the company name.
ListItem item = new ListItem(name);
// Add the ListItem object to the ListBox control, if the
// item does not already exist.
if (!CustomerListBox.Items.Contains(item))
{
CustomerListBox.Items.Add(item);
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewCommandEventArgs Example</h3>
<asp:detailsview id="ItemDetailsView"
datasourceid="DetailsViewSource"
allowpaging="true"
autogeneraterows="false"
onitemcommand="ItemDetailsView_ItemCommand"
runat="server">
<fields>
<asp:boundfield datafield="CustomerID"
headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName"
headertext="Company Name"/>
<asp:boundfield datafield="Address"
headertext="Address"/>
<asp:boundfield datafield="City"
headertext="City"/>
<asp:boundfield datafield="PostalCode"
headertext="ZIP Code"/>
<asp:boundfield datafield="Country"
headertext="Country"/>
<asp:buttonfield buttontype="Link"
causesvalidation="false"
text="Add to List"
commandname="Add"/>
</fields>
</asp:detailsview>
<br/><br/>
Selected Customers:<br/>
<asp:listbox id="CustomerListBox"
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]"
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 ItemDetailsView_ItemCommand(ByVal sender As Object, _
ByVal e As DetailsViewCommandEventArgs) _
Handles ItemDetailsView.ItemCommand
' Use the CommandName property to determine which button
' was clicked.
If e.CommandName = "Add" Then
' Add the customer to the customer list.
' Get the row that contains the company name. In this
' example, the company name is in the second row (index 1)
' of the DetailsView control.
Dim row As DetailsViewRow = ItemDetailsView.Rows(1)
' Get the company's name from the appropriate cell.
' In this example, the company name is in the second cell
' (index 1) of the row.
Dim name As String = row.Cells(1).Text
' Create a ListItem object with the company name.
Dim item As New ListItem(name)
' Add the ListItem object to the ListBox control, if the
' item does not already exist.
If Not CustomerListBox.Items.Contains(item) Then
CustomerListBox.Items.Add(item)
End If
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DetailsViewCommandEventArgs Example</h3>
<asp:detailsview id="ItemDetailsView"
datasourceid="DetailsViewSource"
allowpaging="true"
autogeneraterows="false"
runat="server">
<fields>
<asp:boundfield datafield="CustomerID"
headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName"
headertext="Company Name"/>
<asp:boundfield datafield="Address"
headertext="Address"/>
<asp:boundfield datafield="City"
headertext="City"/>
<asp:boundfield datafield="PostalCode"
headertext="ZIP Code"/>
<asp:boundfield datafield="Country"
headertext="Country"/>
<asp:buttonfield buttontype="Link"
causesvalidation="false"
text="Add to List"
commandname="Add"/>
</fields>
</asp:detailsview>
<br/><br/>
Selected Customers:<br/>
<asp:listbox id="CustomerListBox"
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]"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
En el ejemplo de código siguiente se muestra una versión del modelo de codificación subyacente del ejemplo anterior. Para que este ejemplo funcione, debe copiar el código siguiente en el archivo de código subyacente asociado.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>DetailsViewCommandEventArgs Example</h3>
<asp:detailsview id="ItemDetailsView"
datasourceid="DetailsViewSource"
allowpaging="true"
autogeneraterows="false"
onitemcommand="ItemDetailsView_ItemCommand"
runat="server">
<fields>
<asp:boundfield datafield="CustomerID"
headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName"
headertext="Company Name"/>
<asp:boundfield datafield="Address"
headertext="Address"/>
<asp:boundfield datafield="City"
headertext="City"/>
<asp:boundfield datafield="PostalCode"
headertext="ZIP Code"/>
<asp:boundfield datafield="Country"
headertext="Country"/>
<asp:buttonfield buttontype="Link"
causesvalidation="false"
text="Add to List"
commandname="Add"/>
</fields>
</asp:detailsview>
<br/><br/>
Selected Customers:<br/>
<asp:listbox id="CustomerListBox"
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]"
connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="DefaultVB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
<form id="Form1" runat="server">
<h3>DetailsViewCommandEventArgs Example</h3>
<asp:detailsview id="ItemDetailsView"
datasourceid="DetailsViewSource"
allowpaging="true"
autogeneraterows="false"
onitemcommand="ItemDetailsView_ItemCommand"
runat="server">
<fields>
<asp:boundfield datafield="CustomerID"
headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName"
headertext="Company Name"/>
<asp:boundfield datafield="Address"
headertext="Address"/>
<asp:boundfield datafield="City"
headertext="City"/>
<asp:boundfield datafield="PostalCode"
headertext="ZIP Code"/>
<asp:boundfield datafield="Country"
headertext="Country"/>
<asp:buttonfield buttontype="Link"
causesvalidation="false"
text="Add to List"
commandname="Add"/>
</fields>
</asp:detailsview>
<br/><br/>
Selected Customers:<br/>
<asp:listbox id="CustomerListBox"
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]"
connectionstring=
"<%$ ConnectionStrings:NorthWindConnectionString%>"
runat="server"/>
</form>
</body>
</html>
En el ejemplo de código siguiente se muestra el archivo de código subyacente del ejemplo anterior.
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 _Default : System.Web.UI.Page
{
public void ItemDetailsView_ItemCommand(Object sender, DetailsViewCommandEventArgs e)
{
// Use the CommandName property to determine which button
// was clicked.
if (e.CommandName == "Add")
{
// Add the customer to the customer list.
// Get the row that contains the company name. In this
// example, the company name is in the second row (index 1)
// of the DetailsView control.
DetailsViewRow row = ItemDetailsView.Rows[1];
// Get the company's name from the appropriate cell.
// In this example, the company name is in the second cell
// (index 1) of the row.
String name = row.Cells[1].Text;
// Create a ListItem object with the company name.
ListItem item = new ListItem(name);
// Add the ListItem object to the ListBox control, if the
// item does not already exist.
if (!CustomerListBox.Items.Contains(item))
{
CustomerListBox.Items.Add(item);
}
}
}
}
Partial Class DefaultVB
Inherits System.Web.UI.Page
Public Sub ItemDetailsView_ItemCommand(ByVal sender As Object, ByVal e As DetailsViewCommandEventArgs)
' Use the CommandName property to determine which button
' was clicked.
If e.CommandName = "Add" Then
' Add the customer to the customer list.
' Get the row that contains the company name. In this
' example, the company name is in the second row (index 1)
' of the DetailsView control.
Dim row As DetailsViewRow = ItemDetailsView.Rows(1)
' Get the company's name from the appropriate cell.
' In this example, the company name is in the second cell
' (index 1) of the row.
Dim name As String = row.Cells(1).Text
' Create a ListItem object with the company name.
Dim item As ListItem = New ListItem(name)
' Add the ListItem object to the ListBox control, if the
' item does not already exist.
If Not CustomerListBox.Items.Contains(item) Then
CustomerListBox.Items.Add(item)
End If
End If
End Sub
End Class
Comentarios
El DetailsView control genera el ItemCommand evento cuando se hace clic en un botón dentro de un ButtonFieldcampo de fila , CommandFieldo TemplateField . Esto le permite proporcionar un controlador de eventos que realice una rutina personalizada cada vez que se produzca este evento.
Nota
El DetailsView control también genera otros eventos especializados cuando se hace clic en determinados botones (botones con la CommandName propiedad establecida en "Eliminar", "Insertar", "Página" o "Actualizar"). Al usar uno de estos botones, debe considerar la posibilidad de usar uno de los eventos especializados proporcionados por el control (como ItemDeleted o ItemDeleting).
Se pasa un DetailsViewCommandEventArgs objeto al controlador de eventos. Si el botón que generó el evento tiene un nombre de comando o un valor de argumento de comando, puede usar el DetailsViewCommandEventArgs objeto para determinar estos valores. Para determinar el nombre del comando y el argumento de comando del botón en el que se hace clic, use las CommandName propiedades y CommandArgument , respectivamente. También puede acceder al DetailsView control que generó el evento mediante la CommandSource propiedad .
Para obtener una lista con los valores de propiedad iniciales de una instancia de la clase DetailsViewCommandEventArgs, vea el constructor DetailsViewCommandEventArgs.
Constructores
| DetailsViewCommandEventArgs(Object, CommandEventArgs) |
Inicializa una nueva instancia de la clase DetailsViewCommandEventArgs. |
Propiedades
| CommandArgument |
Obtiene el argumento del comando. (Heredado de CommandEventArgs) |
| CommandName |
Obtiene el nombre del comando. (Heredado de CommandEventArgs) |
| CommandSource |
Obtiene el origen del comando. |
| Handled |
Obtiene o establece un valor que indica si el control ha controlado el evento. |
Métodos
| Equals(Object) |
Determina si el objeto especificado es igual que el objeto actual. (Heredado de Object) |
| GetHashCode() |
Sirve como la función hash predeterminada. (Heredado de Object) |
| GetType() |
Obtiene el Type de la instancia actual. (Heredado de Object) |
| MemberwiseClone() |
Crea una copia superficial del Object actual. (Heredado de Object) |
| ToString() |
Devuelve una cadena que representa el objeto actual. (Heredado de Object) |
Se aplica a
Consulte también
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