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DetailsViewDeletedEventArgs 類別

定義

提供 ItemDeleted 事件的資料。

public ref class DetailsViewDeletedEventArgs : EventArgs
public class DetailsViewDeletedEventArgs : EventArgs
type DetailsViewDeletedEventArgs = class
    inherit EventArgs
Public Class DetailsViewDeletedEventArgs
Inherits EventArgs
繼承
DetailsViewDeletedEventArgs

範例

下列程式碼範例示範如何使用 DetailsViewDeletedEventArgs 傳遞至 事件處理常式的物件, ItemDeleted 判斷刪除作業期間是否發生例外狀況。


<%@ 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 StoresDetailView_ItemDeleted(Object sender, 
    DetailsViewDeletedEventArgs e)
  {
    // Use the Exception property to determine whether an exception
    // occurred during the delete operation.
    if (e.Exception == null)
    {
      // Use the AffectedRows property to determine the numbers of
      // rows affected by the delete operation.
      if (e.AffectedRows == 1)
      {
        MessageLabel.Text = e.AffectedRows.ToString() 
          + " record deleted successfully.";
      }
      else
      {
        MessageLabel.Text = e.AffectedRows.ToString() 
          + " records deleted successfully.";
      }
    }
    else
    {
      // Insert the code to handle the exception.
      MessageLabel.Text = e.Exception.Message;
      
      // Use the ExceptionHandled property to indicate that the 
      // exception is already handled.
      e.ExceptionHandled = true;
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewDeletedEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          onitemdeleted="StoresDetailView_ItemDeleted" 
          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" AutoEventWireup="False" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub StoresDetailView_ItemDeleted(ByVal sender As Object, _
    ByVal e As DetailsViewDeletedEventArgs) _
    Handles CustomerDetailsView.ItemDeleted
  
    ' Use the Exception property to determine whether an exception
    ' occurred during the delete operation.
    If e.Exception Is Nothing Then
    
      ' Use the AffectedRows property to determine the numbers of
      ' rows affected by the delete operation.
      If e.AffectedRows = 1 Then
      
        MessageLabel.Text = e.AffectedRows.ToString() _
          & " record deleted successfully."
      
      Else
              
        MessageLabel.Text = e.AffectedRows.ToString() _
          & " records deleted successfully."
      
      End If
    
    Else
    
      ' Insert the code to handle the exception.
      MessageLabel.Text = e.Exception.Message
      
      ' Use the ExceptionHandled property to indicate that the 
      ' exception is already handled.
      e.ExceptionHandled = True
    
    End If
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>DetailsViewDeletedEventArgs Example</h3>
                
        <asp:detailsview id="CustomerDetailsView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"
          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 (CommandName 控制項的 屬性設定為 「Delete」) ,但在控制項刪除記錄之後 DetailsView ,控制項就會引發 ItemDeleted 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檢查刪除作業的結果。

DetailsViewDeletedEventArgs物件會傳遞至事件處理常式,可讓您判斷受影響的記錄數目,以及可能發生的任何例外狀況。 若要判斷受刪除作業影響的記錄數目,請使用 AffectedRows 屬性。 Exception使用 屬性來判斷是否發生任何例外狀況。 您也可以藉由設定 ExceptionHandled 屬性,指出是否在事件處理常式中處理例外狀況。 如果您想要存取已刪除記錄之索引鍵欄位和非索引鍵欄位的名稱/值組,請分別使用 KeysValues 屬性。

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 DetailsViewDeletedEventArgs 類別之執行個體的初始屬性值清單,請參閱 DetailsViewDeletedEventArgs 建構函式。

建構函式

DetailsViewDeletedEventArgs(Int32, Exception)

初始化 DetailsViewDeletedEventArgs 類別的新執行個體。

屬性

AffectedRows

取得刪除作業所影響的資料列數目。

Exception

取得刪除作業中引發的例外狀況 (如果有的話)。

ExceptionHandled

取得或設定值,指出是否在事件處理常式中處理刪除作業中引發的例外狀況。

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。

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

另請參閱