ListView.ItemInserted ListView.ItemInserted ListView.ItemInserted ListView.ItemInserted Event

定義

挿入操作が要求されたときに、ListView コントロールが項目をデータ ソースに挿入した後で発生します。Occurs when an insert operation is requested, after the ListView control has inserted the item in the data source.

public:
 event EventHandler<System::Web::UI::WebControls::ListViewInsertedEventArgs ^> ^ ItemInserted;
public event EventHandler<System.Web.UI.WebControls.ListViewInsertedEventArgs> ItemInserted;
member this.ItemInserted : EventHandler<System.Web.UI.WebControls.ListViewInsertedEventArgs> 
Public Custom Event ItemInserted As EventHandler(Of ListViewInsertedEventArgs) 

次の例では、イベント ハンドラーを追加する方法を示しています、ItemInsertedイベント。The following example shows how to add an event handler for the ItemInserted event.

重要

この例には、ユーザー入力を受け付けるテキスト ボックスがあります。これにより、セキュリティが脆弱になる可能性があります。This example has a text box that accepts user input, which is a potential security threat. 既定では、ASP.NET Web ページによって、ユーザー入力にスクリプトまたは HTML 要素が含まれていないかどうかが検証されます。By default, ASP.NET Web pages validate that user input does not include script or HTML elements. 詳細については、「スクリプトによる攻略の概要」を参照してください。For more information, see Script Exploits Overview.

<%@ 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">

  //<Snippet3>
  void ContactsListView_ItemInserted(Object sender, ListViewInsertedEventArgs e)
  {
    if (e.Exception != null)
    {
      if (e.AffectedRows == 0)
      {
        e.KeepInInsertMode = true;
        Message.Text = "An exception occurred inserting the new Contact. " +
          "Please verify your values and try again.";
      }
      else
        Message.Text = "An exception occurred inserting the new Contact. " +
          "Please verify the values in the newly inserted item.";

      e.ExceptionHandled = true;
    }
  }
  //</Snippet3>

  protected void Page_Load(object sender, EventArgs e)
  {
    Message.Text = "";
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>ListView.ItemInserted Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListViewItemInserted Example</h3>
            
      <asp:Label ID="Message"
        ForeColor="Red"          
        runat="server"/>
      <br/>
      
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource" 
        DataKeyNames="ContactID"
        OnItemInserted="ContactsListView_ItemInserted"  
        InsertItemPosition="LastItem"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" border="1" 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>&nbsp;
              <asp:Label ID="EmailLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
            </td>
          </tr>
        </ItemTemplate>
        <InsertItemTemplate>
          <tr style="background-color:#D3D3D3">
            <td valign="top">
              <asp:Label runat="server" ID="FirstNameLabel" 
                AssociatedControlID="FirstNameTextBox" Text="First Name"/>
              <asp:TextBox ID="FirstNameTextBox" runat="server" 
                Text='<%#Bind("FirstName") %>' /><br />
              <asp:Label runat="server" ID="LastNameLabel" 
                AssociatedControlID="LastNameTextBox" Text="Last Name" />
              <asp:TextBox ID="LastNameTextBox" runat="server" 
                Text='<%#Bind("LastName") %>' /><br />
              <asp:Label runat="server" ID="EmailLabel" 
                AssociatedControlID="EmailTextBox" Text="Email" />
              <asp:TextBox ID="EmailTextBox" runat="server" 
                Text='<%#Bind("EmailAddress") %>' />
            </td>
            <td>
              <asp:LinkButton ID="InsertButton" runat="server" 
                CommandName="Insert" Text="Insert" />
            </td>
          </tr>
        </InsertItemTemplate>
      </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"
        InsertCommand="INSERT INTO Person.Contact
          ([FirstName], [LastName], [EmailAddress], [PasswordHash], [PasswordSalt]) 
          Values(@FirstName, @LastName, @EmailAddress, '', '');
          SELECT @ContactID = SCOPE_IDENTITY()">
        <InsertParameters>
          <asp:Parameter Name="FirstName" />
          <asp:Parameter Name="LastName" />
          <asp:Parameter Name="EmailAddress" />
          <asp:Parameter Name="ContactID" Type="Int32" Direction="Output" />
        </InsertParameters>
      </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">

  '<Snippet3>
  Sub ContactsListView_ItemInserted(ByVal sender As Object, ByVal e As ListViewInsertedEventArgs)

    If e.Exception IsNot Nothing Then

      If e.AffectedRows = 0 Then
        e.KeepInInsertMode = True
        Message.Text = "An exception occurred inserting the new Contact. " & _
          "Please verify your values and try again."
      Else
        Message.Text = "An exception occurred inserting the new Contact. " & _
          "Please verify the values in the newly inserted item."
      End If

      e.ExceptionHandled = True
    End If
  End Sub
  '</Snippet3>

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
    Message.Text = ""
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>ListView.ItemInserted Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListViewItemInserted Example</h3>
            
      <asp:Label ID="Message"
        ForeColor="Red"          
        runat="server"/>
      <br/>
      
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource" 
        DataKeyNames="ContactID"
        OnItemInserted="ContactsListView_ItemInserted"  
        InsertItemPosition="LastItem"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" border="1" 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>&nbsp;
              <asp:Label ID="EmailLabel" runat="server" Text='<%#Eval("EmailAddress") %>' />
            </td>
          </tr>
        </ItemTemplate>
        <InsertItemTemplate>
          <tr style="background-color:#D3D3D3">
            <td valign="top">
              <asp:Label runat="server" ID="FirstNameLabel" 
                AssociatedControlID="FirstNameTextBox" Text="First Name"/>
              <asp:TextBox ID="FirstNameTextBox" runat="server" 
                Text='<%#Bind("FirstName") %>' /><br />
              <asp:Label runat="server" ID="LastNameLabel" 
                AssociatedControlID="LastNameTextBox" Text="Last Name" />
              <asp:TextBox ID="LastNameTextBox" runat="server" 
                Text='<%#Bind("LastName") %>' /><br />
              <asp:Label runat="server" ID="EmailLabel" 
                AssociatedControlID="EmailTextBox" Text="Email" />
              <asp:TextBox ID="EmailTextBox" runat="server" 
                Text='<%#Bind("EmailAddress") %>' />
            </td>
            <td>
              <asp:LinkButton ID="InsertButton" runat="server" 
                CommandName="Insert" Text="Insert" />
            </td>
          </tr>
        </InsertItemTemplate>
      </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"
        InsertCommand="INSERT INTO Person.Contact
          ([FirstName], [LastName], [EmailAddress], [PasswordHash], [PasswordSalt]) 
          Values(@FirstName, @LastName, @EmailAddress, '', '');
          SELECT @ContactID = SCOPE_IDENTITY()">
        <InsertParameters>
          <asp:Parameter Name="FirstName" />
          <asp:Parameter Name="LastName" />
          <asp:Parameter Name="EmailAddress" />
          <asp:Parameter Name="ContactID" Type="Int32" Direction="Output" />
        </InsertParameters>
      </asp:SqlDataSource>
      
    </form>
  </body>
</html>

注釈

ListView生成を制御、ItemInsertedでの Insert ボタンのときにイベントをInsertItemTemplateテンプレートをクリックしてまたはInsertNewItem後メソッドが呼び出された、ListViewコントロールがデータ ソース内の項目を挿入します。The ListView control raises the ItemInserted event when an Insert button in the InsertItemTemplate template is clicked or the InsertNewItem method is called, after the ListView control inserts the item in the data source. (の Insert ボタンがいるボタン コントロールCommandNameプロパティが"Insert"に設定します)。これにより、挿入操作の結果を確認するなど、このイベントが発生するたびに、カスタムのルーチンを実行することができます。(An Insert button is a button control whose CommandName property is set to "Insert".) This enables you to perform a custom routine whenever this event occurs, such as checking the results of an insert operation.

AListViewInsertedEventArgsオブジェクトが影響を受けたレコードの数を決定することができます、イベント ハンドラーに渡されます。A ListViewInsertedEventArgs object is passed to the event handler, which enables you to determine the number of records affected. また、どのような例外が発生した可能性を判断することもできます。It also lets you determine what exceptions might have occurred. 挿入操作の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 that were affected by the insert operation, use the AffectedRows property. 任意の例外が発生したかどうかを調べるには、Exceptionプロパティ。To determine whether any exceptions occurred, use the Exception property. かどうか、例外によって処理されたイベント ハンドラーの設定を指定することも、ExceptionHandledプロパティ。You can also indicate whether the exception was handled in the event handler by setting the ExceptionHandled property. 挿入されたレコードの値にアクセスする場合を使用して、Valuesプロパティ。If you want to access the values of the inserted record, use the Values property.

場合、AffectedRowsプロパティを報告する項目が挿入されていない、挿入値を再バインドすることができます、InsertItemTemplateテンプレートを設定して、KeepInInsertModeプロパティをtrueします。If the AffectedRows property reports that no items were inserted, you can rebind the insert values to the InsertItemTemplate template by setting the KeepInInsertMode property to true.

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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