GridViewPageEventArgs 類別

定義

public ref class GridViewPageEventArgs : System::ComponentModel::CancelEventArgs

public class GridViewPageEventArgs : System.ComponentModel.CancelEventArgs

type GridViewPageEventArgs = class
    inherit CancelEventArgs

Public Class GridViewPageEventArgs
Inherits CancelEventArgs

繼承

Object

EventArgs

CancelEventArgs

GridViewPageEventArgs

範例

以下範例示範如何利用 GridViewPageEventArgs 傳遞給事件處理方法的物件，來判斷使用者所選頁面的索引並取消分頁操作。

<%@ 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 CustomersGridView_PageIndexChanging(Object sender, GridViewPageEventArgs e)
  {
    
    // Cancel the paging operation if the user attempts to navigate
    // to another page while the GridView control is in edit mode. 
    if (CustomersGridView.EditIndex != -1)
    {
      // Use the Cancel property to cancel the paging operation.
      e.Cancel = true;
      
      // Display an error message.
      int newPageNumber = e.NewPageIndex + 1;
      Message.Text = "Please update the record before moving to page " +
        newPageNumber.ToString() + ".";
    }
    else
    {
      // Clear the error message.
      Message.Text = "";
    }
    
  }

  void CustomersGridView_RowCancelingEdit(Object sender, GridViewCancelEditEventArgs e)
  {
    // Clear the error message.
    Message.Text = "";
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView PageIndexChanging Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView PageIndexChanging Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"
        runat="server"/>
                
      <br/>  

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        autogeneratecolumns="true"
        emptydatatext="No data available." 
        allowpaging="true"
        autogenerateeditbutton="true"
        datakeynames="CustomerID"  
        onpageindexchanging="CustomersGridView_PageIndexChanging"
        onrowcancelingedit="CustomersGridView_RowCancelingEdit" 
        runat="server">
                
        <pagersettings mode="Numeric"
          position="Bottom"           
          pagebuttoncount="10"/>
                      
        <pagerstyle backcolor="LightBlue"/>
                
      </asp:gridview>
            
      <!-- 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="CustomersSource"
        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 CustomersGridView_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
    
    ' Cancel the paging operation if the user attempts to navigate
    ' to another page while the GridView control is in edit mode. 
    If CustomersGridView.EditIndex <> -1 Then
    
      ' Use the Cancel property to cancel the paging operation.
      e.Cancel = True
      
      ' Display an error message.
      Dim newPageNumber As Integer = e.NewPageIndex + 1
      Message.Text = "Please update the record before moving to page " & _
        newPageNumber.ToString() & "."
    
    Else
    
      ' Clear the error message.
      Message.Text = ""
    
    End If
    
  End Sub

  Sub CustomersGridView_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs)
  
    ' Clear the error message.
    Message.Text = ""
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView PageIndexChanging Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView PageIndexChanging Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"
        runat="server"/>
                
      <br/>  

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        autogeneratecolumns="true"
        emptydatatext="No data available." 
        allowpaging="true"
        autogenerateeditbutton="true"
        datakeynames="CustomerID"  
        onpageindexchanging="CustomersGridView_PageIndexChanging"
        onrowcancelingedit="CustomersGridView_RowCancelingEdit" 
        runat="server">
                
        <pagersettings mode="Numeric"
          position="Bottom"           
          pagebuttoncount="10"/>
                      
        <pagerstyle backcolor="LightBlue"/>
                
      </asp:gridview>
            
      <!-- 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="CustomersSource"
        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>

備註

GridView當控制項內的分頁器按鈕（PageIndexChanging屬性設為「Page」）被點擊，但在控制項處理分頁操作之前CommandName，控制項會觸發GridView事件。 這讓你能提供一種事件處理方法，執行自訂例程，例如在事件發生時取消分頁操作。

物件 GridViewPageEventArgs 會傳入事件處理方法，讓你判斷使用者所選頁面的索引，並指示應取消分頁操作。 要取消分頁操作，請將物件的CancelEventArgs.Cancel屬性設GridViewPageEventArgs為 true。

欲了解更多如何處理事件的資訊，請參閱 「處理與提升事件」。

如需 實例 GridViewPageEventArgs的初始屬性值清單，請參閱 建構函式 GridViewPageEventArgs 。

另請參閱

• GridView
• GridViewPageEventHandler
• PageIndexChanging