DetailsViewPageEventArgs.NewPageIndex DetailsViewPageEventArgs.NewPageIndex DetailsViewPageEventArgs.NewPageIndex DetailsViewPageEventArgs.NewPageIndex Property

Определение

Получает или задает индекс новой страницы, отображающейся в элементе управления DetailsView.Gets or sets the index of the new page to display in the DetailsView control.

public:
 property int NewPageIndex { int get(); void set(int value); };
public int NewPageIndex { get; set; }
member this.NewPageIndex : int with get, set
Public Property NewPageIndex As Integer

Значение свойства

Индекс новой страницы, отображающейся в элементе управления DetailsView.The index of the new page to display in the DetailsView control.

Примеры

В следующем примере кода показано, как использовать NewPageIndex свойство для определения индекса страницы, выбранной пользователем.The following code example demonstrates how to use the NewPageIndex property to determine the index of the page selected by the user.


<%@ 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_PageIndexChanging(Object sender, DetailsViewPageEventArgs e)
  {
    // Cancel the paging operation if the DetailsView control 
    // in edit mode.
    if (CustomerDetailsView.CurrentMode == DetailsViewMode.Edit)
    {
      e.Cancel = true;
      
      // Display an error message.
      int newPage = e.NewPageIndex + 1;
      MessageLabel.Text = "Please update the current record before to moving to page " + 
        newPage.ToString() + ".";
    }
  }

  void CustomerDetailsView_ModeChanging(Object sender, DetailsViewModeEventArgs e)
  {
    // Clear the message label when the user cancels edit mode.
    if (e.CancelingEdit)
    {
      MessageLabel.Text = "";
    }
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DetailsViewPageEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewPageEventArgs Example</h3>
                       
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          datakeynames="CustomerID"  
          allowpaging="true"
          onpageindexchanging="CustomerDetailsView_PageIndexChanging" 
          onmodechanging="CustomerDetailsView_ModeChanging"
          runat="server">
            
          <pagersettings position="Bottom"/> 
                    
        </asp:detailsview>
        
        <br/>
        
        <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]"
          updatecommand="Update [Customers] Set 
          [CompanyName]=@CompanyName, [Address]=@Address, 
          [City]=@City, [PostalCode]=@PostalCode, 
          [Country]=@Country 
          Where [CustomerID]=@CustomerID"
          connectionstring=
          "<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </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 CustomerDetailsView_PageIndexChanging(ByVal sender As Object, ByVal e As DetailsViewPageEventArgs)
  
    ' Cancel the paging operation if the DetailsView control 
    ' in edit mode.
    If CustomerDetailsView.CurrentMode = DetailsViewMode.Edit Then
    
      e.Cancel = True
      
      ' Display an error message.
      Dim newPage As Integer = e.NewPageIndex + 1
      MessageLabel.Text = "Please update the current record before to moving to page " & _
        newPage.ToString() & "."
    
    End If
      
  End Sub

  Sub CustomerDetailsView_ModeChanging(ByVal sender As Object, ByVal e As DetailsViewModeEventArgs)
  
    ' Clear the message label when the user cancels edit mode.
    If e.CancelingEdit Then
    
      MessageLabel.Text = ""
    
    End If
      
  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DetailsViewPageEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewPageEventArgs Example</h3>
                       
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true"
          autogenerateeditbutton="true"
          datakeynames="CustomerID"   
          allowpaging="true"
          onpageindexchanging="CustomerDetailsView_PageIndexChanging" 
          onmodechanging="CustomerDetailsView_ModeChanging"
          runat="server">
            
          <pagersettings position="Bottom"/> 
                    
        </asp:detailsview>
        
        <br/>
        
        <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]"
          updatecommand="Update [Customers] Set 
          [CompanyName]=@CompanyName, [Address]=@Address, 
          [City]=@City, [PostalCode]=@PostalCode, 
          [Country]=@Country 
          Where [CustomerID]=@CustomerID"
          connectionstring=
          "<%$ ConnectionStrings:NorthWindConnectionString%>" 
          runat="server"/>
            
      </form>
  </body>
</html>

Комментарии

Поскольку событие происходит DetailsView до того, как элемент управления выполняет операцию разбиения PageIndex по страницам, свойство элемента управления содержит индекс ранее отображаемой страницы и не может быть использован для определения индекса страницы, выбранной PageIndexChanging пользователем.Because the PageIndexChanging event occurs before the DetailsView control performs the paging operation, the PageIndex property of the control contains the index of the previously displayed page and cannot be used to determine the index of the page selected by the user. NewPageIndex Используйте свойство для определения индекса страницы.Use the NewPageIndex property to determine the page index. Это свойство также можно использовать для программного переопределения индекса страницы, выбранного пользователем, присвоив ему другое значение.You can also use this property to programmatically override the page index selected by the user by setting it to another value.

Применяется к

Дополнительно