ListViewDeletedEventArgs クラス

定義

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

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

次の例は、オブジェクトを使用ListViewDeletedEventArgsして、削除操作中に例外が発生したかどうかを判断する方法を示しています。The following example shows how to use the ListViewDeletedEventArgs object to determine whether an exception occurred during a delete operation. オブジェクトは、 ItemDeletedイベントのイベント処理メソッドに渡されます。 ListViewDeletedEventArgsThe ListViewDeletedEventArgs object is passed to the event-handling method for the ItemDeleted event.

<%@ 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 Page_Load()
    {
        Message.Text = String.Empty;
    }
    
    void ContactsListView_ItemDeleted(Object sender, ListViewDeletedEventArgs e)
    {
        // Determine whether an exception occurred during the delete operation.
        if (e.Exception == null)
        {
            // Ensure that a record was deleted.
            if (e.AffectedRows > 0)
            {
                Message.Text = e.AffectedRows + " item(s) deleted successfully.";
            }
            else
            {
                Message.Text = "No item was deleted.";
            }
        }
        else
        {
            // Insert the code to handle the exception here.

            // Indicate that the exception has been handled.
            e.ExceptionHandled = true;
            Message.Text = "An error occurred during the delete operation.";
        }
    }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ListViewDeletedEventArgs Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListViewDeletedEventArgs Example</h3>
            
      <asp:Label ID="Message"
        ForeColor="Red"          
        runat="server"/>
      <br/>
            
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource" 
        DataKeyNames="ContactID"
        OnItemDeleted="ContactsListView_ItemDeleted"  
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" runat="server" id="tblContacts" width="640px">
            <tr runat="server" id="itemPlaceholder" />
          </table>
          <asp:DataPager runat="server" ID="PeopleDataPager" PageSize="12">
            <Fields>
              <asp:NextPreviousPagerField 
                ShowFirstPageButton="true" ShowLastPageButton="true"
                FirstPageText="|&lt;&lt; " LastPageText=" &gt;&gt;|"
                NextPageText=" &gt; " PreviousPageText=" &lt; " />
            </Fields>
          </asp:DataPager>
        </LayoutTemplate>
        <ItemTemplate>
          <tr runat="server">
            <td valign="top">
              <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
              <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
            </td>
            <td>
              <asp:Label ID="EmailLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
            </td>
            <td>
              <asp:LinkButton ID="DeleteButton" runat="server" 
                CommandName="Delete" 
                Text="Delete" 
                OnClientClick="return confirm('Are you sure?');" />
            </td>
          </tr>
        </ItemTemplate>
      </asp:ListView>

      <!-- This example uses Microsoft SQL Server and connects    -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET  -->
      <!-- expression to retrieve the connection string value     -->
      <!-- from the Web.config file.                              -->            
      <asp:SqlDataSource ID="ContactsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT [ContactID], [FirstName], [LastName], [EmailAddress] 
          FROM Person.Contact"
        DeleteCommand="DELETE FROM Person.Contact WHERE [ContactID] = @ContactID">
        <DeleteParameters>
            <asp:Parameter Name="ContactID" Type="Int32" />
        </DeleteParameters>
      </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 Page_Load()
        Message.Text = String.Empty
    End Sub
    
    Sub ContactsListView_ItemDeleted(sender As Object, e As ListViewDeletedEventArgs)

        ' Determine whether an exception occurred during the delete operation.
        If e.Exception Is Nothing Then
            ' Ensure that a record was deleted.
            If e.AffectedRows > 0 Then
                Message.Text = e.AffectedRows.ToString() & _
                    " item(s) deleted successfully."
            Else
                Message.Text = "No item was deleted."
            End If
        Else
            ' Insert the code to handle the exception here.

            ' Indicate that the exception has been handled.
            e.ExceptionHandled = true
            Message.Text = "An error occurred during the delete operation."
        End If
    End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>ListViewDeletedEventArgs Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListViewDeletedEventArgs Example</h3>
            
      <asp:Label ID="Message"
        ForeColor="Red"          
        runat="server"/>
      <br/>
            
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource" 
        DataKeyNames="ContactID"
        OnItemDeleted="ContactsListView_ItemDeleted"  
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" runat="server" id="tblContacts" width="640px">
            <tr runat="server" id="itemPlaceholder" />
          </table>
          <asp:DataPager runat="server" ID="PeopleDataPager" PageSize="12">
            <Fields>
              <asp:NextPreviousPagerField 
                ShowFirstPageButton="true" ShowLastPageButton="true"
                FirstPageText="|&lt;&lt; " LastPageText=" &gt;&gt;|"
                NextPageText=" &gt; " PreviousPageText=" &lt; " />
            </Fields>
          </asp:DataPager>
        </LayoutTemplate>
        <ItemTemplate>
          <tr runat="server">
            <td valign="top">
              <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
              <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
            </td>
            <td>
              <asp:Label ID="EmailLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
            </td>
            <td>
              <asp:LinkButton ID="DeleteButton" runat="server" 
                CommandName="Delete" 
                Text="Delete" 
                OnClientClick="return confirm('Are you sure?');" />
            </td>
          </tr>
        </ItemTemplate>
      </asp:ListView>

      <!-- This example uses Microsoft SQL Server and connects    -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET  -->
      <!-- expression to retrieve the connection string value     -->
      <!-- from the Web.config file.                              -->            
      <asp:SqlDataSource ID="ContactsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT [ContactID], [FirstName], [LastName], [EmailAddress] 
          FROM Person.Contact"
        DeleteCommand="DELETE FROM Person.Contact WHERE [ContactID] = @ContactID">
        <DeleteParameters>
            <asp:Parameter Name="ContactID" Type="Int32" />
        </DeleteParameters>
      </asp:SqlDataSource>
      
    </form>
  </body>
</html>

注釈

コントロールは、コントロールItemDeletedの [削除] ボタンをクリックしたとき、またDeleteItemはメソッドが呼び出されたときListViewに、コントロールが項目を削除した後に、イベントを発生させます。 ListViewThe ListView control raises the ItemDeleted event when a Delete button in the control is clicked or the DeleteItem method is called, but after the ListView control deletes the item. (削除ボタンは、 CommandNameプロパティが "Delete" に設定されているボタンです)。これにより、このイベントが発生するたびに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るようになります。たとえば、削除操作の結果を確認することができます。(A Delete button is a button whose CommandName property is set to "Delete".) This enables you to provide an event-handling method that performs a custom routine whenever this event occurs, such as checking the results of a delete operation.

ListViewDeletedEventArgsオブジェクトは、イベント処理メソッドに渡されます。A ListViewDeletedEventArgs object is passed to the event-handling method. このオブジェクトを使用すると、影響を受ける項目の数と発生した可能性がある例外を特定できます。This object enables you to determine the number of items affected and any exceptions that might have occurred. 削除操作によって影響を受けた項目の数を確認するにAffectedRowsは、プロパティを使用します。To determine the number of items that were affected by the delete operation, use the AffectedRows property. 例外が発生したかどうかをException確認するには、プロパティを使用します。To determine whether any exceptions occurred, use the Exception property. イベント処理メソッドで例外を処理したかどうかは、 ExceptionHandledプロパティを設定することによって指定できます。You can indicate whether you have handled the exception in the event-handling method by setting the ExceptionHandled property.

注意

削除操作中に例外が発生しExceptionHandled 、プロパティがにfalse設定されてListViewいる場合、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 ListView control re-throws the exception.

削除された項目のキーフィールドにアクセスするにKeysは、プロパティを使用します。To access the key fields of the deleted item, use the Keys property. 削除された項目のキー以外のフィールドにアクセスするValuesには、プロパティを使用します。To access non-key fields of the deleted item, use the Values property. ListViewDeletedEventArgs クラスのインスタンスの初期プロパティ値一覧については、ListViewDeletedEventArgs コンストラクターに関するトピックを参照してください。For a list of initial property values for an instance of the ListViewDeletedEventArgs class, see the ListViewDeletedEventArgs constructor.

コンストラクター

ListViewDeletedEventArgs(Int32, Exception)

ListViewDeletedEventArgs 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 ListViewDeletedEventArgs class.

プロパティ

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 that were affected by the delete operation.

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

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 that indicates whether an exception that was raised during the delete operation was handled in the event handler.

Keys

削除された項目のキーを取得します。Gets the key or keys for the deleted item.

Values

削除された項目のキー以外のフィールド値を取得します。Gets the non-key field values for the deleted item.

メソッド

Equals(Object)

指定され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定します。Determines whether the specified object is equal to the current object.

(継承元 Object)
GetHashCode()

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

(継承元 Object)
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.

(継承元 Object)
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.

(継承元 Object)
ToString()

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

(継承元 Object)

適用対象

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