GridView.RowUpdated GridView.RowUpdated GridView.RowUpdated GridView.RowUpdated Event

定義

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

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

次の例では、 RowUpdatedイベントを使用して、更新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 RowUpdated event to check the result of the update 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_RowUpdated(Object sender, GridViewUpdatedEventArgs e)
  {
    
    // Indicate whether the update operation succeeded.
    if(e.Exception == null)
    {
      Message.Text = "Row updated successfully.";
    }
    else
    {
      e.ExceptionHandled = true;
      Message.Text = "An error occurred while attempting to update the row.";
    }
    
  }

  void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
  {
        
    // The update operation was canceled. Clear the message label.
    Message.Text = "";
    
  }

  void CustomersGridView_RowEditing(Object sender, GridViewEditEventArgs e)
  {
    // The GridView control is entering edit mode. Clear the message label.
    Message.Text = "";
  }
    

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowUpdated Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowUpdated Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"
        onrowupdated="CustomersGridView_RowUpdated"
        onrowcancelingedit="CustomersGridView_RowCancelingEdit"
        onrowediting="CustomersGridView_RowEditing"   
        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]"
        updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country 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_RowUpdated(ByVal sender As Object, ByVal e As GridViewUpdatedEventArgs)
    
    ' Indicate whether the update operation succeeded.
    If e.Exception Is Nothing Then
    
      Message.Text = "Row updated successfully."
    
    Else
    
      e.ExceptionHandled = True
      Message.Text = "An error occurred while attempting to update the row."
    
    End If
    
  End Sub

  Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
        
    ' The update operation was canceled. Clear the message label.
    Message.Text = ""
    
  End Sub

  Sub CustomersGridView_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
  
    ' The GridView control is entering edit mode. Clear the message label.
    Message.Text = ""
    
  End Sub
    

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowUpdated Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView RowUpdated Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"
        onrowupdated="CustomersGridView_RowUpdated"
        onrowcancelingedit="CustomersGridView_RowCancelingEdit"
        onrowediting="CustomersGridView_RowEditing"   
        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]"
        updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country WHERE (CustomerID = @CustomerID)"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

注釈

イベントRowUpdatedは、行の [更新] ボタンがクリックされたときにGridView 、コントロールによって行が更新されたときに発生します。The RowUpdated event is raised when a row's Update button is clicked, but after the GridView control updates the row. これにより、このイベントが発生するたびに、更新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 update operation, whenever this event occurs.

GridViewUpdatedEventArgs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 GridViewUpdatedEventArgs 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 GridViewUpdatedEventArgs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 GridViewUpdatedEventArgs 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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