GridViewDeletedEventArgs GridViewDeletedEventArgs GridViewDeletedEventArgs GridViewDeletedEventArgs Class

定義

RowDeleted イベントのデータを提供します。Provides data for the RowDeleted event.

public ref class GridViewDeletedEventArgs : EventArgs
public class GridViewDeletedEventArgs : EventArgs
type GridViewDeletedEventArgs = class
    inherit EventArgs
Public Class GridViewDeletedEventArgs
Inherits EventArgs
継承
GridViewDeletedEventArgsGridViewDeletedEventArgsGridViewDeletedEventArgsGridViewDeletedEventArgs

次の例では、使用する方法、GridViewDeletedEventArgsオブジェクトのイベント処理メソッドに渡される、RowDeleted削除操作中に例外が発生したかどうかを決定するイベントです。The following example demonstrates how to use the GridViewDeletedEventArgs object passed to the event-handling method for the RowDeleted event to determine whether an exception occurred during a delete operation.


<%@ 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)
  {

    // Use the Exception property to determine whether an exception
    // occurred during the delete operation.
    if (e.Exception == null)
    {
      // Use the AffectedRows property to determine whether the
      // record was deleted. Sometimes an error might occur that 
      // does not raise an exception, but prevents the delete
      // operation from completing.
      if (e.AffectedRows == 1)
      {
        Message.Text = "Record deleted successfully.";
      }
      else
      {
        Message.Text = "An error occurred during the delete operation.";
      }
    }
    else
    {
      // Insert the code to handle the exception.
      Message.Text = "An error occurred during the delete operation.";

      // Use the ExceptionHandled property to indicate that the 
      // exception is already handled.
      e.ExceptionHandled = true;
    }
    
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridViewDeletedEventArgs 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"
        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(ByVal sender As Object, ByVal e As GridViewDeletedEventArgs)

    ' Use the Exception property to determine whether an exception
    ' occurred during the delete operation.
    If e.Exception Is Nothing Then

      ' Use the AffectedRows property to determine whether the
      ' record was deleted. Sometimes an error might occur that 
      ' does not raise an exception, but prevents the delete
      ' operation from completing.
      If e.AffectedRows = 1 Then
      
        Message.Text = "Record deleted successfully."
      
      Else
      
        Message.Text = "An error occurred during the delete operation."
      
      End If
    
    Else
          
      ' Insert the code to handle the exception.
      Message.Text = "An error occurred during the delete operation."

      ' Use the ExceptionHandled property to indicate that the 
      ' exception is already handled.
      e.ExceptionHandled = True
    
    End If
    
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridViewDeletedEventArgs 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"
        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

GridView生成を制御、RowDeletedイベントと削除 ボタン (ボタンをそのCommandNameプロパティが"Delete"に設定) コントロール内でをクリックした後は、GridView制御レコードを削除します。The GridView control raises the RowDeleted event when a Delete button (a button with its CommandName property set to "Delete") within the control is clicked, but after the GridView control deletes the record. 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してなどのカスタムの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 allows you to provide an event-handling method that performs a custom routine, such as checking the results of a delete operation, whenever this event occurs.

AGridViewDeletedEventArgsと発生した例外の影響を受けたレコードの数を決定することができるイベント処理メソッドにオブジェクトが渡されます。A GridViewDeletedEventArgs object is passed to the event-handling method, which allows you to determine the number of records affected and any exceptions that might have occurred. 削除操作によって影響を受けたレコードの数を調べるには、AffectedRowsプロパティ。To determine the number of records affected by the delete operation, use the AffectedRows property. 使用して、Exceptionプロパティを任意の例外が発生したかどうかを判断します。Use the Exception property to determine whether any exceptions occurred. 設定して、イベント処理メソッドで例外が処理されたかどうかを指定することも、ExceptionHandledプロパティ。You can also indicate whether the exception was handled in the event-handling method by setting the ExceptionHandled property.

注意

削除操作中に例外が発生した場合、ExceptionHandledプロパティに設定されてfalseGridViewコントロールは、例外を再スローします。If an exception occurs during the delete operation and the ExceptionHandled property is set to false, the GridView control re-throws the exception.

キー フィールドと削除されたレコードの非キー フィールドの名前/値ペアにアクセスする場合は、使用、KeysValuesプロパティでは、それぞれします。If you want to access the name/value pairs of the key fields and non-key fields of the deleted record, use the Keys and Values properties, respectively.

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.

コンストラクター

GridViewDeletedEventArgs(Int32, Exception) GridViewDeletedEventArgs(Int32, Exception) GridViewDeletedEventArgs(Int32, Exception) GridViewDeletedEventArgs(Int32, Exception)

GridViewDeletedEventArgs クラスの新しいインスタンスを初期化します。Initializes a new instance of the GridViewDeletedEventArgs class.

プロパティ

AffectedRows AffectedRows AffectedRows AffectedRows

削除操作の影響を受けた行の数を取得します。Gets the number of rows affected by the delete operation.

Exception Exception Exception Exception

削除操作中に例外が発生した場合は、その例外を取得します。Gets the exception (if any) that was raised during the delete operation.

ExceptionHandled ExceptionHandled ExceptionHandled ExceptionHandled

削除操作中に発生した例外がイベント ハンドラーで処理されたかどうかを示す値を取得または設定します。Gets or sets a value indicating whether an exception that was raised during the delete operation was handled in the event handler.

Keys Keys Keys Keys

削除されたレコードのキー フィールドの名前と値のペアの並べ替え後のディクショナリを取得します。Gets an ordered dictionary of key field name/value pairs for the deleted record.

Values Values Values Values

削除されたレコードのキー以外のフィールドの名前と値のペアのディクショナリを取得します。Gets a dictionary of the non-key field name/value pairs for the deleted record.

メソッド

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(Inherited from Object)

適用対象

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