OracleRowUpdatedEventArgs 类

定义

RowUpdated 事件提供数据。 此类不能被继承。

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
继承
OracleRowUpdatedEventArgs

示例

以下示例演示如何同时使用 RowUpdatingRowUpdated 事件。

事件 RowUpdating 返回以下输出:

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

事件 RowUpdated 返回以下输出:

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

注解

完成 RowUpdated 对行的 时 Update ,将引发 事件。

使用 Update时,更新的每个数据行都会发生两个事件。 执行顺序如下:

  1. 中的 DataRow 值将移动到参数值。

  2. 引发 OnRowUpdating 事件。

  3. 命令执行。

  4. 如果命令设置为 FirstReturnedRecord,则返回的第一个结果将放在 中 DataRow

  5. 如果有输出参数,则它们放置在 中 DataRow

  6. 引发 OnRowUpdated 事件。

  7. 调用 AcceptChanges

构造函数

OracleRowUpdatedEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

初始化 OracleRowUpdatedEventArgs 类的新实例。

属性

Command

获取或设置当调用 OracleCommand 时执行的 Update(DataSet)

Errors

获取当 Command 执行时 .NET 数据提供程序生成的任何错误。

(继承自 RowUpdatedEventArgs)
RecordsAffected

通过执行 SQL 语句获取更改、插入或删除的行数。

(继承自 RowUpdatedEventArgs)
Row

获取通过 Update(DataSet) 发送的 DataRow

(继承自 RowUpdatedEventArgs)
RowCount

获取在一批更新记录中处理的行数。

(继承自 RowUpdatedEventArgs)
StatementType

获取所执行的 SQL 语句的类型。

(继承自 RowUpdatedEventArgs)
Status

获取 Command 属性的 UpdateStatus

(继承自 RowUpdatedEventArgs)
TableMapping

获取通过 Update(DataSet) 发送的 DataTableMapping

(继承自 RowUpdatedEventArgs)

方法

CopyToRows(DataRow[], Int32)

将已修改的行的引用复制到提供的数组中。

(继承自 RowUpdatedEventArgs)
CopyToRows(DataRow[])

将已修改的行的引用复制到提供的数组中。

(继承自 RowUpdatedEventArgs)
Equals(Object)

确定指定对象是否等于当前对象。

(继承自 Object)
GetHashCode()

作为默认哈希函数。

(继承自 Object)
GetType()

获取当前实例的 Type

(继承自 Object)
MemberwiseClone()

创建当前 Object 的浅表副本。

(继承自 Object)
ToString()

返回表示当前对象的字符串。

(继承自 Object)

适用于