DetailsViewDeleteEventArgs 類別

參考

定義

命名空間:: System.Web.UI.WebControls

組件:: System.Web.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

提供 ItemDeleting 事件的資料。

public ref class DetailsViewDeleteEventArgs : System::ComponentModel::CancelEventArgs

public class DetailsViewDeleteEventArgs : System.ComponentModel.CancelEventArgs

type DetailsViewDeleteEventArgs = class
    inherit CancelEventArgs

Public Class DetailsViewDeleteEventArgs
Inherits CancelEventArgs

繼承: Object

EventArgs

CancelEventArgs
DetailsViewDeleteEventArgs

範例

下列程式碼範例示範如何使用 DetailsViewDeleteEventArgs 傳遞至事件處理常式的物件，讓 ItemDeleting 事件取消刪除作業。


<%@ 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_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 xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewDeleteEventArgs Example</title>
</head>
<body>
    <form id="form1" 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="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_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 xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewDeleteEventArgs Example</title>
</head>
<body>
    <form id="form1" 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>

備註

DetailsView當控制項的 [刪除] 按鈕 (控制項 CommandName 的屬性設定為「Delete」) ，但在控制項刪除記錄之前 DetailsView ，控制項就會引發 ItemDeleting 事件。這可讓您提供執行自訂常式的事件處理常式，例如在刪除記錄之前驗證記錄，每當發生此事件時。

DetailsViewDeletedEventArgs物件會傳遞至事件處理常式，可讓您判斷要刪除之記錄的索引，並指出應該取消刪除作業。若要判斷記錄的索引，請使用 RowIndex 屬性。若要取消刪除作業，請將 Cancel 屬性設定為 true 。您也可以分別使用 Keys 和 Values 屬性來存取索引鍵欄位和非索引鍵欄位。如果您想要在刪除記錄之前先確認記錄，這些值會很有用。

注意

可以修改屬性中的 Keys 索引鍵域值。如果您變更這些值，將會刪除對應至新索引鍵域值的記錄。

如需如何處理事件的詳細資訊，請參閱處理和引發事件。

如需類別實例 DetailsViewDeleteEventArgs 的初始屬性值清單，請參閱建 DetailsViewDeleteEventArgs 構函式。

建構函式

DetailsViewDeleteEventArgs(Int32)

初始化 DetailsViewDeleteEventArgs 類別的新執行個體。

屬性

Cancel	取得或設定值，這個值表示是否應該取消事件。 (繼承來源 CancelEventArgs)
Keys	取得索引鍵欄位名稱/值組的排序字典，其中包含已刪除項目之索引鍵欄位的名稱和值。
RowIndex	取得要刪除之資料列的索引。
Values	取得要刪除項目中非索引鍵欄位名稱/值組的字典。

方法

Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)

適用於

共用方式為

DetailsViewDeleteEventArgs 類別

定義

範例

備註

建構函式

屬性

方法

適用於

另請參閱

其他資源