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Evento DetailsView.ItemDeleted

 

Publicado: noviembre de 2016

Se produce cuando un botón Eliminar dentro de un DetailsView se hace clic en el control, pero después de la operación de eliminación.

Espacio de nombres:   System.Web.UI.WebControls
Ensamblado:  System.Web (en System.Web.dll)

public event DetailsViewDeletedEventHandler ItemDeleted

El ItemDeleted evento se produce cuando en un botón Eliminar el DetailsView se hace clic en el control, pero después de la operación de eliminación. Esto permite proporcionar un controlador de eventos que realiza una rutina personalizada, como comprobar los resultados de la operación de eliminación, siempre que se produce este evento.

Un DetailsViewDeletedEventArgs objeto se pasa al controlador de eventos, que permite determinar el número de filas afectadas y las excepciones que se hayan producido. También puede indicar si la excepción se controló en el evento controlador estableciendo la ExceptionHandled propiedad.

Para obtener más información sobre el control de eventos, vea NIB: consumir eventos.

En el ejemplo de código siguiente se muestra cómo utilizar el ItemDeleted eventos para actualizar un GridView control después de un DetailsView control realiza una operación de eliminación. Esto evita que el GridView control sincronizado con el 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 CustomerDetail_ItemInserted(object sender, 
    DetailsViewInsertedEventArgs e)
  {
    // Refresh the GridView control after a new record is inserted 
    // in the DetailsView control.
    CustomersView.DataBind();
  }

  void CustomerDetail_ItemInserting(object sender, 
    DetailsViewInsertEventArgs e)
  {
    // Iterate though the values entered by the user and HTML encode 
    // the values. This helps prevent malicious values from being 
    // stored in the data source.
    for (int i = 0; i < e.Values.Count; i++)
    {
      if (e.Values[i] != null)
      {
        e.Values[i] = Server.HtmlEncode(e.Values[i].ToString());
      }
    }
  }

  void CustomerDetail_ItemUpdated(object sender, 
    DetailsViewUpdatedEventArgs e)
  {
    // Refresh the GridView control after a new record is updated 
    // in the DetailsView control.
    CustomersView.DataBind();
  }

  void CustomerDetail_ItemUpdating(object sender, 
    DetailsViewUpdateEventArgs e)
  {
    // Iterate though the values entered by the user and HTML encode 
    // the values. This helps prevent malicious values from being 
    // stored in the data source.
    for (int i = 0; i < e.NewValues.Count; i++)
    {
      if (e.NewValues[i] != null)
      {
        e.NewValues[i] = Server.HtmlEncode(e.NewValues[i].ToString());
      }
    }
  }

  void CustomerDetail_ItemDeleted(object sender, 
    DetailsViewDeletedEventArgs e)
  {
    // Refresh the GridView control after a new record is updated 
    // in the DetailsView control.
    CustomersView.DataBind();
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>
      DetailsView Example</title>
</head>
<body>
  <form id="Form1" runat="server">
    <h3>
      DetailsView Example</h3>
    <table cellspacing="10">
      <tr>
        <td>
          <!-- Use a GridView control in combination with      -->
          <!-- a DetailsView control to display master-detail  -->
          <!-- information. When the user selects a store from -->
          <!-- GridView control, the customers//s detailed     -->
          <!-- information is displayed in the DetailsView     -->
          <!-- control.                                        -->
          <asp:GridView ID="CustomersView" DataSourceID="Customers" 
            AutoGenerateColumns="False"
            DataKeyNames="CustomerID" runat="server">
            <HeaderStyle BackColor="Blue" ForeColor="White" />
            <Columns>
              <asp:CommandField ShowSelectButton="True" />
              <asp:BoundField DataField="ContactName" 
                HeaderText="ContactName" />
              <asp:BoundField DataField="CompanyName" 
                HeaderText="CompanyName" />
            </Columns>
          </asp:GridView>
        </td>
        <td valign="top">
          <asp:DetailsView ID="CustomerDetail" 
            DataSourceID="Details" AutoGenerateRows="false"
            AutoGenerateInsertButton="true" 
            AutoGenerateEditButton="true" 
            AutoGenerateDeleteButton="true"
            EmptyDataText="No records." 
            DataKeyNames="CustomerID" GridLines="Both" 
            OnItemInserted="CustomerDetail_ItemInserted"
            OnItemInserting="CustomerDetail_ItemInserting" 
            OnItemUpdated="CustomerDetail_ItemUpdated"
            OnItemUpdating="CustomerDetail_ItemUpdating" 
            OnItemDeleted="CustomerDetail_ItemDeleted"
            runat="server">
            <HeaderStyle BackColor="Navy" ForeColor="White" />
            <RowStyle BackColor="White" />
            <AlternatingRowStyle BackColor="LightGray" />
            <EditRowStyle BackColor="LightCyan" />
            <Fields>
              <asp:BoundField DataField="CustomerID" HeaderText="CustomerID" ReadOnly="True" />
              <asp:BoundField DataField="ContactName" HeaderText="ContactName" />
              <asp:BoundField DataField="ContactTitle" HeaderText="ContactTitle" />
              <asp:BoundField DataField="CompanyName" HeaderText="CompanyName" />
              <asp:BoundField DataField="Address" HeaderText="Address" />
              <asp:BoundField DataField="City" HeaderText="City" />
              <asp:BoundField DataField="Region" HeaderText="Region" />
              <asp:BoundField DataField="PostalCode" HeaderText="PostalCode" />
              <asp:BoundField DataField="Country" HeaderText="Country" />
              <asp:BoundField DataField="Phone" HeaderText="Phone" />
              <asp:BoundField DataField="Fax" HeaderText="Fax" />
            </Fields>
          </asp:DetailsView>
        </td>
      </tr>
    </table>
    <!-- This example uses Microsoft SQL Server and connects -->
    <!-- to the Northwind sample database.                   -->
    <!-- It is strongly recommended that each data-bound     -->
    <!-- control uses a separate data source control.        -->
    <asp:SqlDataSource ID="Customers" runat="server" 
      ConnectionString=
        "<%$ ConnectionStrings:NorthwindConnectionString %>"
      SelectCommand="SELECT [CompanyName], [ContactName], [CustomerID] 
        FROM [Customers]">
    </asp:SqlDataSource>
    <!-- Add a filter to the data source control for the     -->
    <!-- DetailsView control to display the details of the   -->
    <!-- store selected in the GridView control.             -->
    <asp:SqlDataSource ID="Details" 
      ConnectionString=
        "<%$ ConnectionStrings:NorthwindConnectionString %>"
      runat="server" 
      SelectCommand="SELECT * FROM [Customers] 
        WHERE ([CustomerID] = @CustomerID)"
      DeleteCommand="DELETE FROM [Customers] 
        WHERE [CustomerID] = @CustomerID"
      InsertCommand="INSERT INTO [Customers] ([CustomerID], 
        [CompanyName], [ContactName], [ContactTitle], [Address], 
        [City], [Region], [PostalCode], [Country], [Phone], [Fax]) 
        VALUES (@CustomerID, @CompanyName, @ContactName, @ContactTitle, 
        @Address, @City, @Region, @PostalCode, @Country, @Phone, @Fax)"
      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] = @CustomerID">
      <SelectParameters>
        <asp:ControlParameter ControlID="CustomersView" 
          Name="CustomerID" PropertyName="SelectedValue"
          Type="String" />
      </SelectParameters>
      <DeleteParameters>
        <asp:Parameter Name="CustomerID" Type="String" />
      </DeleteParameters>
      <UpdateParameters>
        <asp:Parameter Name="CompanyName" Type="String" />
        <asp:Parameter Name="ContactName" Type="String" />
        <asp:Parameter Name="ContactTitle" Type="String" />
        <asp:Parameter Name="Address" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Region" Type="String" />
        <asp:Parameter Name="PostalCode" Type="String" />
        <asp:Parameter Name="Country" Type="String" />
        <asp:Parameter Name="Phone" Type="String" />
        <asp:Parameter Name="Fax" Type="String" />
        <asp:Parameter Name="CustomerID" Type="String" />
      </UpdateParameters>
      <InsertParameters>
        <asp:Parameter Name="CustomerID" Type="String" />
        <asp:Parameter Name="CompanyName" Type="String" />
        <asp:Parameter Name="ContactName" Type="String" />
        <asp:Parameter Name="ContactTitle" Type="String" />
        <asp:Parameter Name="Address" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Region" Type="String" />
        <asp:Parameter Name="PostalCode" Type="String" />
        <asp:Parameter Name="Country" Type="String" />
        <asp:Parameter Name="Phone" Type="String" />
        <asp:Parameter Name="Fax" Type="String" />
      </InsertParameters>
    </asp:SqlDataSource>
  </form>
</body>
</html>

.NET Framework
Disponible desde 2.0
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