GridViewDeletedEventArgs 類別

定義

提供 RowDeleted 事件的資料。Provides data for the RowDeleted event.

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

範例

下列範例示範如何使用 GridViewDeletedEventArgs 傳遞給事件處理方法的物件來處理 RowDeleted 事件,以判斷刪除作業期間是否發生例外狀況。The following example demonstrates how to use the GridViewDeletedEventArgs object passed to the event-handling method for the RowDeleted event to determine whether an exception occurred during a delete operation.


<%@ 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_RowDeleted(Object sender, GridViewDeletedEventArgs 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 whether the
      // record was deleted. Sometimes an error might occur that 
      // does not raise an exception, but prevents the delete
      // operation from completing.
      if (e.AffectedRows == 1)
      {
        Message.Text = "Record deleted successfully.";
      }
      else
      {
        Message.Text = "An error occurred during the delete operation.";
      }
    }
    else
    {
      // Insert the code to handle the exception.
      Message.Text = "An error occurred during the delete operation.";

      // 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>GridViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridViewDeletedEventArgs Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogeneratedeletebutton="true"
        datakeynames="CustomerID"
        onrowdeleted="CustomersGridView_RowDeleted"  
        runat="server">
      </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="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        deletecommand="Delete from Customers where CustomerID = @CustomerID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </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 CustomersGridView_RowDeleted(ByVal sender As Object, ByVal e As GridViewDeletedEventArgs)

    ' 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 whether the
      ' record was deleted. Sometimes an error might occur that 
      ' does not raise an exception, but prevents the delete
      ' operation from completing.
      If e.AffectedRows = 1 Then
      
        Message.Text = "Record deleted successfully."
      
      Else
      
        Message.Text = "An error occurred during the delete operation."
      
      End If
    
    Else
          
      ' Insert the code to handle the exception.
      Message.Text = "An error occurred during the delete operation."

      ' 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>GridViewDeletedEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridViewDeletedEventArgs Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"          
        runat="server"/>
                
      <br/>
            
      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogeneratedeletebutton="true"
        datakeynames="CustomerID"
        onrowdeleted="CustomersGridView_RowDeleted"  
        runat="server">
      </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="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        deletecommand="Delete from Customers where CustomerID = @CustomerID"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
      
    </form>
  </body>
</html>

備註

GridView RowDeleted 當按一下 [刪除] (按鈕時,控制項會引發事件 CommandName ,而控制項中的屬性設為 [刪除] ) ,但在 GridView 控制項刪除記錄之後。The GridView control raises the RowDeleted event when a Delete button (a button with its CommandName property set to "Delete") within the control is clicked, but after the GridView control deletes the record. 這可讓您提供事件處理方法,以執行自訂常式(例如,在每次發生此事件時檢查刪除作業的結果)。This allows you to provide an event-handling method that performs a custom routine, such as checking the results of a delete operation, whenever this event occurs.

GridViewDeletedEventArgs物件會傳遞至事件處理方法,可讓您判斷受影響的記錄數目,以及任何可能發生的例外狀況。A GridViewDeletedEventArgs object is passed to the event-handling method, which allows you to determine the number of records affected and any exceptions that might have occurred. 若要判斷刪除作業所影響的記錄數目,請使用 AffectedRows 屬性。To determine the number of records affected by the delete operation, use the AffectedRows property. Exception 可以使用屬性來判斷是否發生任何例外狀況。Use the Exception property to determine whether any exceptions occurred. 您也可以藉由設定屬性,指出是否已在事件處理方法中處理例外狀況 ExceptionHandledYou can also indicate whether the exception was handled in the event-handling method by setting the ExceptionHandled property.

注意

如果刪除作業期間發生例外狀況,而且 ExceptionHandled 屬性設定為 falseGridView 控制項會重新擲回例外狀況。If an exception occurs during the delete operation and the ExceptionHandled property is set to false, the GridView control re-throws the exception.

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。If you want to access the name/value pairs of the key fields and non-key fields of the deleted record, use the Keys and Values properties, respectively.

如需如何處理事件的詳細資訊,請參閱 處理和引發事件For more information about how to handle events, see Handling and Raising Events.

建構函式

GridViewDeletedEventArgs(Int32, Exception)

初始化 GridViewDeletedEventArgs 類別的新執行個體。Initializes a new instance of the GridViewDeletedEventArgs class.

屬性

AffectedRows

取得刪除作業所影響的資料列數目。Gets the number of rows affected by the delete operation.

Exception

取得刪除作業中引發的例外狀況 (如果有的話)。Gets the exception (if any) that was raised during the delete operation.

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。Gets or sets a value indicating whether an exception that was raised during the delete operation was handled in the event handler.

Keys

取得已刪除資料錄中索引鍵欄位名稱/值組的排序字典。Gets an ordered dictionary of key field name/value pairs for the deleted record.

Values

取得已刪除資料錄中非索引鍵欄位名稱/值組的字典。Gets a dictionary of the non-key field name/value pairs for the deleted record.

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
GetHashCode()

做為預設雜湊函式。Serves as the default hash function.

(繼承來源 Object)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(繼承來源 Object)

適用於

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