GridView.RowDeleted GridView.RowDeleted GridView.RowDeleted GridView.RowDeleted Event

定義

行の Delete ボタンがクリックされた場合に、GridView コントロールが行を削除した後に発生します。Occurs when a row's Delete button is clicked, but after the GridView control deletes the row.

public:
 event System::Web::UI::WebControls::GridViewDeletedEventHandler ^ RowDeleted;
public event System.Web.UI.WebControls.GridViewDeletedEventHandler RowDeleted;
member this.RowDeleted : System.Web.UI.WebControls.GridViewDeletedEventHandler 
Public Custom Event RowDeleted As GridViewDeletedEventHandler 

次の例では、 RowDeletedイベントを使用して、削除操作の結果を確認する方法を示します。The following example demonstrates how to use the RowDeleted event to check the result of the delete operation. 操作が成功したかどうかをユーザーに示すメッセージが表示されます。A message is displayed to indicate to the user whether the operation succeeded.


<%@ 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_RowDeleted(Object sender, GridViewDeletedEventArgs e)
  {
    
    // Display whether the delete operation succeeded.
    if(e.Exception == null)
    {
      Message.Text = "Row deleted successfully.";
    }
    else
    {
      Message.Text = "An error occurred while attempting to delete the row.";
      e.ExceptionHandled = true;   
    }
    
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowDeleted Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowDeleted Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogeneratedeletebutton="true"
        datakeynames="CustomerID"
        onrowdeleted="CustomersGridView_RowDeleted"  
        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_RowDeleted(sender As Object, e As GridViewDeletedEventArgs)
    
    ' Display whether the delete operation succeeded.
    If e.Exception Is Nothing Then
    
      Message.Text = "Row deleted successfully."
    
    Else
          
      Message.Text = "An error occurred while attempting to delete the row."
      e.ExceptionHandled = True
      
    End If
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowDeleted Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowDeleted Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogeneratedeletebutton="true"
        datakeynames="CustomerID"
        onrowdeleted="CustomersGridView_RowDeleted"  
        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>

注釈

イベントは、行の Delete ボタンがクリックされたときに、コントロールGridViewによって行が削除された後に発生します。 RowDeletedThe RowDeleted event is raised when a row's Delete button is clicked, but after the GridView control deletes the row. これにより、このイベントが発生するたびに、削除操作の結果を確認するなどのカスタムルーチンを実行するイベント処理メソッドを提供できます。This enables you to provide an event-handling method that performs a custom routine, such as checking the results of the delete operation, whenever this event occurs.

GridViewDeletedEventArgsオブジェクトは、イベント処理メソッドに渡されます。これにより、影響を受ける行の数と発生した可能性のある例外を確認できます。A GridViewDeletedEventArgs object is passed to the event-handling method, which enables you to determine the number of rows affected and any exceptions that might have occurred. また、 ExceptionHandled GridViewDeletedEventArgsオブジェクトのプロパティを設定することによって、イベント処理メソッドで例外が処理されたかどうかを示すこともできます。You can also indicate whether the exception was handled in the event-handling method by setting the ExceptionHandled property of the GridViewDeletedEventArgs object.

イベントを処理する方法の詳細については、次を参照してください。処理とイベントの発生します。For more information about how to handle events, see Handling and Raising Events.

適用対象

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