DetailsViewInsertedEventArgs.ExceptionHandled DetailsViewInsertedEventArgs.ExceptionHandled DetailsViewInsertedEventArgs.ExceptionHandled DetailsViewInsertedEventArgs.ExceptionHandled Property

定義

挿入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 insert operation was handled in the event handler.

public:
 property bool ExceptionHandled { bool get(); void set(bool value); };
public bool ExceptionHandled { get; set; }
member this.ExceptionHandled : bool with get, set
Public Property ExceptionHandled As Boolean

プロパティ値

イベント ハンドラーで例外が処理された場合は true。それ以外の場合は falsetrue if the exception was handled in the event handler; otherwise, false. 既定値は、false です。The default is false.

次のコード例は、 ExceptionHandledプロパティを使用して、例外がイベントハンドラーで処理されたことを示す方法を示しています。The following code example demonstrates how to use the ExceptionHandled property to indicate that the exception was handled in the event handler.


<%@ 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 CustomerDetailsView_ItemInserted(Object sender, 
    DetailsViewInsertedEventArgs e)
  {
    // Use the Exception property to determine whether an exception
    // occurred during the insert operation.
    if (e.Exception == null && e.AffectedRows == 1)
    {
      // Use the Values property to get the value entered by 
      // the user for the CompanyName field.
      String name = e.Values["CompanyName"].ToString();

      // Display a confirmation message.
      MessageLabel.Text = name + " added successfully. ";

    }
    else
    {
      // Insert the code to handle the exception.
      MessageLabel.Text = e.Exception.Message;
      
      // Use the ExceptionHandled property to indicate that the 
      // exception is already handled.
      e.ExceptionHandled = true;
      
      // When an exception occurs, keep the DetailsView
      // control in insert mode.
      e.KeepInInsertMode = true;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewInsertedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewInsertedEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogenerateinsertbutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          oniteminserted="CustomerDetailsView_ItemInserted" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <asp:label id="MessageLabel"
          forecolor="Red"
          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="DetailsViewSource"
          selectcommand="Select [CustomerID], [CompanyName], [Address], 
            [City], [PostalCode], [Country] From [Customers]"
          insertcommand="INSERT INTO [Customers]([CustomerID], 
            [CompanyName], [Address], [City], [PostalCode], 
            [Country]) VALUES (@CustomerID, @CompanyName, @Address, 
            @City, @PostalCode, @Country)"
          connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </form>
  </body>
</html>


<%@ Page language="VB" autoeventwireup="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub CustomerDetailsView_ItemInserted(ByVal sender As Object, _
    ByVal e As DetailsViewInsertedEventArgs) _
    Handles CustomerDetailsView.ItemInserted

    ' Use the Exception property to determine whether an exception
    ' occurred during the insert operation.
    If e.Exception Is Nothing And e.AffectedRows = 1 Then
    
      ' Use the Values property to get the value entered by 
      ' the user for the CompanyName field.
      Dim name As String = e.Values("CompanyName").ToString()

      ' Display a confirmation message.
      MessageLabel.Text = name & " added successfully. "
    
    Else
    
      ' Insert the code to handle the exception.
      MessageLabel.Text = e.Exception.Message
      
      ' Use the ExceptionHandled property to indicate that the 
      ' exception is already handled.
      e.ExceptionHandled = True
      
      ' When an exception occurs, keep the DetailsView
      ' control in insert mode.
      e.KeepInInsertMode = True
    
    End If
        
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewInsertedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewInsertedEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogenerateinsertbutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <asp:label id="MessageLabel"
          forecolor="Red"
          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="DetailsViewSource"
          selectcommand="Select [CustomerID], [CompanyName], [Address], 
            [City], [PostalCode], [Country] From [Customers]"
          insertcommand="INSERT INTO [Customers]([CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country]) 
            VALUES (@CustomerID, @CompanyName, @Address, @City, 
            @PostalCode, @Country)"
          connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </form>
  </body>
</html>

注釈

挿入操作中に例外が発生した場合は、 ExceptionHandledプロパティを使用して、例外がイベントハンドラーで処理されたかどうかを示します。When an exception is raised during the insert operation, use the ExceptionHandled property to indicate whether the exception was handled in the event handler. このプロパティがにtrue設定されている場合、例外は処理済みと見なされ、コールスタックの上位に渡されません。When this property is set to true, the exception is considered handled and is not passed further up the call stack. このプロパティがにfalse設定されている場合、例外は、処理のために呼び出し履歴の次のメソッドに渡されます。If this property is set to false, the exception is passed to the next method on the call stack for handling. 発生した例外を特定するにはException 、プロパティを使用します。To determine which exception was raised, use the Exception property.

適用対象

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