OracleRowUpdatedEventArgs 類別

定義

public ref class OracleRowUpdatedEventArgs sealed : System::Data::Common::RowUpdatedEventArgs

public sealed class OracleRowUpdatedEventArgs : System.Data.Common.RowUpdatedEventArgs

type OracleRowUpdatedEventArgs = class
    inherit RowUpdatedEventArgs

Public NotInheritable Class OracleRowUpdatedEventArgs
Inherits RowUpdatedEventArgs

繼承

Object

EventArgs

RowUpdatedEventArgs

OracleRowUpdatedEventArgs

範例

以下範例說明如何使用 和 RowUpdatingRowUpdated 事件。

該事件回 RowUpdating 傳以下輸出：

Event Arguments: (command=OracleCommand commandType=2status=0)

該事件回 RowUpdated 傳以下輸出：

Event Arguments: (command= OracleCommend commandType=2 recordsAffected=1 row=System.Data.DataRow[37] status=0)

// handler for RowUpdating event
 private static void OnRowUpdating(object sender, OracleRowUpdatingEventArgs e) {
    PrintEventArgs(e);
 }

 //Handler for RowUpdated event.
 private static void OnRowUpdated(object sender, OracleRowUpdatedEventArgs e) {
    PrintEventArgs(e);
 }

 public static int Main(String[] args) {
    const string CONNECTION_STRING = "Data Source=Oracle8i;Integrated Security=yes";
    const string SELECT_ALL = "SELECT * FROM Scott.Emp";

    //Create DataAdapter.
    OracleDataAdapter rAdapter = new OracleDataAdapter(SELECT_ALL, CONNECTION_STRING);
    OracleCommandBuilder cb = new OracleCommandBuilder(rAdapter);

    //Create and fill DataSet (Select only first 5 rows.).
    DataSet rDataSet = new DataSet();
    rAdapter.Fill(rDataSet, 0, 5, "Table");

    //Modify DataSet.
    DataTable rTable = rDataSet.Tables["Table"];
    rTable.Rows[0][1] = "DYZY";

    //Add handlers.
    rAdapter.RowUpdating += new OracleRowUpdatingEventHandler( OnRowUpdating );
    rAdapter.RowUpdated += new OracleRowUpdatedEventHandler( OnRowUpdated );

    //Update--this operation fires two events (RowUpdating and RowUpdated) for each changed row.
    rAdapter.Update(rDataSet, "Table");

    //Remove handlers.
    rAdapter.RowUpdating -= new OracleRowUpdatingEventHandler( OnRowUpdating );
    rAdapter.RowUpdated -= new OracleRowUpdatedEventHandler( OnRowUpdated );
    return 0;
 }

 private static void PrintEventArgs(OracleRowUpdatingEventArgs args) {
    Console.WriteLine("OnRowUpdating");
    Console.WriteLine("  event args: ("+
           " command=" + args.Command +
           " commandType=" + args.StatementType +
           " status=" + args.Status + ")");
 }

 private static void PrintEventArgs(OracleRowUpdatedEventArgs args) {
    Console.WriteLine("OnRowUpdated");
    Console.WriteLine( "  event args: ("+
           " command=" + args.Command +
           " commandType=" + args.StatementType +
           " recordsAffected=" + args.RecordsAffected +
           " status=" + args.Status + ")" );
 }

    'Handler for RowUpdating event.
    Private Shared Sub OnRowUpdating(sender As Object, e As OracleRowUpdatingEventArgs)
        PrintEventArgs(e)
    End Sub

    'Handler for RowUpdated event.
    Private Shared Sub OnRowUpdated(sender As Object, e As OracleRowUpdatedEventArgs)
        PrintEventArgs(e)
    End Sub
    
    'Entry point which delegates to C-style main Private Function.
    Public Overloads Shared Sub Main()
        System.Environment.ExitCode = Main(System.Environment.GetCommandLineArgs())
    End Sub
    
    Overloads Public Shared Function Main(args() As String) As Integer
        Const CONNECTION_STRING As String = "Data Source=Oracle8i;Integrated Security=yes"
        Const SELECT_ALL As String = "SELECT * FROM Scott.Emp"
        
        'Create DataAdapter.
        Dim rAdapter As New OracleDataAdapter(SELECT_ALL, CONNECTION_STRING)
        Dim cb As New OracleCommandBuilder(rAdapter)
        
        'Create and fill DataSet (Select only first 5 rows.).
        Dim rDataSet As New DataSet()
        rAdapter.Fill(rDataSet, 0, 5, "Table")
        
        'Modify DataSet.
        Dim rTable As DataTable = rDataSet.Tables("Table")
        rTable.Rows(0)(1) = "DYZY"
        
        'Add handlers.
        AddHandler rAdapter.RowUpdating, AddressOf OnRowUpdating
        AddHandler rAdapter.RowUpdated, AddressOf OnRowUpdated
        
        'Update--this operation fires two events (RowUpdating and RowUpdated) for each changed row.
        rAdapter.Update(rDataSet, "Table")
        
        'Remove handlers.
        RemoveHandler rAdapter.RowUpdating, AddressOf OnRowUpdating
        RemoveHandler rAdapter.RowUpdated, AddressOf OnRowUpdated
        Return 0
    End Function 'Main
    
    
    Overloads Private Shared Sub PrintEventArgs(args As OracleRowUpdatingEventArgs)
        Console.WriteLine("OnRowUpdating")
        Console.WriteLine("  event args: (" & " command=" & args.Command.CommandText & _
                        " commandType=" & args.StatementType & " status=" & args.Status & ")")
    End Sub
    
    
    Overloads Private Shared Sub PrintEventArgs(args As OracleRowUpdatedEventArgs)
        Console.WriteLine("OnRowUpdated")
        Console.WriteLine("  event args: (" & " command=" & args.Command.CommandText & _
                        " commandType=" & args.StatementType & " recordsAffected=" & _
                        args.RecordsAffected & " status=" & args.Status & ")")
    End Sub
End Class

備註

RowUpdated當一Update行完成時，事件會被提升。

使用 Update時，每更新一列資料會發生兩個事件。 執行順序如下：

1. 中的值 DataRow 會被移到參數值。

2. 便會引發 OnRowUpdating 事件。

3. 指令執行。

4. 如果命令設定為 FirstReturnedRecord，則會將第一個傳回的結果放在 DataRow中。

5. 如果有輸出參數，它們會放在 DataRow中。

6. 便會引發 OnRowUpdated 事件。

7. 呼叫 AcceptChanges。