DetailsViewDeleteEventArgs.RowIndex プロパティとは? わかりやすく解説

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DetailsViewDeleteEventArgs.RowIndex プロパティ

メモ : このプロパティは、.NET Framework version 2.0新しく追加されたものです。

削除される行のインデックス取得します

名前空間: System.Web.UI.WebControls
アセンブリ: System.Web (system.web.dll 内)
構文構文

Dim instance As DetailsViewDeleteEventArgs
Dim value As Integer

value = instance.RowIndex
public int RowIndex { get;
 }
public:
property int RowIndex {
    int get ();
}
/** @property */
public int get_RowIndex ()

プロパティ
削除されるインデックス

解説解説
使用例使用例

RowIndex プロパティ使用して削除される行のインデックス確認する方法コード例次に示します

<%@ Page language="VB" %>

<script runat="server">

  Sub CustomerDetailsView_ItemDeleting(ByVal
 sender As Object, _
    ByVal e As DetailsViewDeleteEventArgs)

    ' Get customer ID and name from the Keys and Values
    ' properties.
    Dim keyValue As String
 = e.Keys("CustomerID").ToString()
    Dim customerName As String
 = e.Values("CompanyName").ToString()

    ' Cancel the delete operation if the user attempts to 
    ' delete protected record. In this example, records
    ' with a customer ID that starts with with "A" cannot
    ' be deleted.
    If keyValue.StartsWith("A")
 Then

      e.Cancel = True
      MessageLabel.Text = "You cannot delete " &
 _
        customerName & ". This customer is protected."
    
    Else
    
      MessageLabel.Text = "Row " & e.RowIndex.ToString()
 & _
        " deleted."
    
    End If
    
  End Sub

</script>

<html>
  <body>
    <form runat="server">
        
      <h3>DetailsViewDeleteEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          onitemdeleting="CustomerDetailsView_ItemDeleting"
 
          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]"
          deletecommand="Delete [Customers] 
            Where [CustomerID]=@CustomerID"
          connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
 
          runat="server"/>
            
      </form>
  </body>
</html>

<%@ Page language="C#" %>

<script runat="server">

  void CustomerDetailsView_ItemDeleting(Object sender, 
    DetailsViewDeleteEventArgs e)
  {

    // Get customer ID and name from the Keys and Values
    // properties.
    String keyValue = e.Keys["CustomerID"].ToString();
    String customerName = e.Values["CompanyName"].ToString();

    // Cancel the delete operation if the user attempts to 
    // delete protected record. In this example, records
    // with a customer ID that starts with with "A" cannot
    // be deleted.
    if (keyValue.StartsWith("A"))
    {
      e.Cancel = true;
      MessageLabel.Text = "You cannot delete " +
        customerName + ". This customer is protected.";
    }
    else
    {
      MessageLabel.Text = "Row " + e.RowIndex.ToString() + 
        " deleted.";
    }

  }

</script>

<html>
  <body>
    <form runat="server">
        
      <h3>DetailsViewDeleteEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          onitemdeleting="CustomerDetailsView_ItemDeleting" 
          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]"
          deletecommand="Delete [Customers] 
            Where [CustomerID]=@CustomerID"
          connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </form>
  </body>
</html>

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参照参照
関連項目
DetailsViewDeleteEventArgs クラス
DetailsViewDeleteEventArgs メンバ
System.Web.UI.WebControls 名前空間
DetailsView クラス
DetailsViewDeleteEventHandler
DetailsView.Rows プロパティ



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