FormView.DeleteItem Método

  • Referencia

Definición

Espacio de nombres:
System.Web.UI.WebControls
Ensamblado:
System.Web.dll

Elimina el registro actual del control FormView del origen de datos.

public:
 virtual void DeleteItem();
public virtual void DeleteItem ();
abstract member DeleteItem : unit -> unit
override this.DeleteItem : unit -> unit
Public Overridable Sub DeleteItem ()

Ejemplos

En el ejemplo siguiente se muestra cómo usar el DeleteItem método para eliminar mediante programación el registro actual en un FormView control del origen de datos.


<%@ 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 DeleteButton_Click(Object sender, EventArgs e)
  {

    // Use the DeleteItem method to programmatically delete
    // the current record in the FormView control. 
    EmployeeFormView.DeleteItem();

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DeleteItem Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DeleteItem Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID" 
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
          
      </asp:formview>
      
      <hr/>
      
      <asp:Button id="DeleteButton"
        text="Delete Record"
        onclick="DeleteButton_Click" 
        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="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        deletecommand="Delete [Employees] Where [EmployeeID]=@EmployeeID"
        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 DeleteButton_Click(ByVal sender As Object, ByVal e As EventArgs)

    ' Use the DeleteItem method to programmatically delete
    ' the current record in the FormView control. 
    EmployeeFormView.DeleteItem()

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DeleteItem Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DeleteItem Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID" 
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
          
      </asp:formview>
      
      <hr/>
      
      <asp:Button id="DeleteButton"
        text="Delete Record"
        onclick="DeleteButton_Click" 
        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="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        deletecommand="Delete [Employees] Where [EmployeeID]=@EmployeeID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
            
    </form>
  </body>
</html>

Comentarios

Use el DeleteItem método para eliminar mediante programación el registro actual en el FormView control del origen de datos. Este método se usa normalmente cuando es necesario eliminar el registro actual desde fuera del FormView control, como desde un control diferente en la página. Al llamar a este método también se generan los ItemDeleted eventos y ItemDeleting .

Se aplica a

Consulte también