DetailsView.ModeChanging 事件

  • 參考

定義

命名空間:
System.Web.UI.WebControls
組件:
System.Web.dll

發生於 DetailsView 控制項嘗試在編輯、插入和唯讀模式之間變更，但是在 CurrentMode 屬性更新之前。

public:
 event System::Web::UI::WebControls::DetailsViewModeEventHandler ^ ModeChanging;
public event System.Web.UI.WebControls.DetailsViewModeEventHandler ModeChanging;
member this.ModeChanging : System.Web.UI.WebControls.DetailsViewModeEventHandler 
Public Custom Event ModeChanging As DetailsViewModeEventHandler

事件類型

DetailsViewModeEventHandler

範例

下列程式碼範例示範如何在控制項處於編輯模式時 DetailsView ，使用 ModeChanging 事件來停用分頁功能。


<%@ 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 CustomerDetailView_ModeChanging(Object sender, DetailsViewModeEventArgs e)
  {
    // Disable the paging feature in edit mode.
    if (e.NewMode == DetailsViewMode.Edit)
    {
        CustomerDetailView.AllowPaging = false;
    }
    else
    {
        CustomerDetailView.AllowPaging = true;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanging Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanging Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true" 
          allowpaging="true"
          onmodechanging="CustomerDetailView_ModeChanging" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- 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" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </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 CustomerDetailView_ModeChanging(ByVal sender As Object, ByVal e As DetailsViewModeEventArgs)
        ' Disable the paging feature in edit mode.
        If e.NewMode = DetailsViewMode.Edit Then
            CustomerDetailView.AllowPaging = False
        Else
            CustomerDetailView.AllowPaging = True
        End If
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanging Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanging Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true" 
          allowpaging="true"
          onmodechanging="CustomerDetailView_ModeChanging" 
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- 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" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

備註

ModeChanging當 DetailsView 控制項嘗試在編輯、插入和唯讀模式之間變更，但在屬性更新之前 CurrentMode ，就會引發 事件。 這可讓您提供事件處理常式來執行自訂常式，例如每當發生此事件時取消模式變更。

DetailsViewModeEventArgs物件會傳遞至事件處理常式，這可讓您判斷新模式、判斷模式變更是否為使用者取消編輯作業的結果，或取消模式變更。 若要判斷新的模式，請使用 NewMode 屬性。 若要判斷模式變更是否為使用者取消編輯作業的結果，請使用 CancelingEdit 屬性。 您可以將 屬性設定 Cancel 為 true 來取消模式變更。

如需如何處理事件的詳細資訊，請參閱 處理和引發事件。

適用於

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