OracleRowUpdatingEventArgs クラス

定義

RowUpdating イベントのデータを提供します。Provides data for the RowUpdating event.

public ref class OracleRowUpdatingEventArgs sealed : System::Data::Common::RowUpdatingEventArgs
public sealed class OracleRowUpdatingEventArgs : System.Data.Common.RowUpdatingEventArgs
type OracleRowUpdatingEventArgs = class
    inherit RowUpdatingEventArgs
Public NotInheritable Class OracleRowUpdatingEventArgs
Inherits RowUpdatingEventArgs
継承
OracleRowUpdatingEventArgs

次の例は、イベントとイベントの両方を使用する方法を示して RowUpdating RowUpdated います。The following example shows how to use both the RowUpdating and RowUpdated events.

このイベントは、次の RowUpdating 出力を返します。The RowUpdating event returns this output:

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

このイベントは、次の RowUpdated 出力を返します。The RowUpdated event returns this output:

Event Arguments: (command=OracleCommand commandType=2 recordsAffected=1 row=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);

    //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)
    
    '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

注釈

RowUpdatingイベントは、が行に対して発生する前に発生し Update ます。The RowUpdating event is raised before an Update to a row.

を使用する場合 Update 、データ行が更新されるたびに発生するイベントが2つあります。When using Update, there are two events that occur for each data row updated. 実行順序は次のとおりです。The order of execution is as follows:

  1. の値は、 DataRow パラメーター値に移動されます。The values in the DataRow are moved to the parameter values.

  2. OnRowUpdating イベントが発生します。The OnRowUpdating event is raised.

  3. コマンドが実行されます。The command executes.

  4. コマンドがに設定されている場合、 FirstReturnedRecord 最初に返された結果がに配置され DataRow ます。If the command is set to FirstReturnedRecord, the first returned result is placed in the DataRow.

  5. 出力パラメーターがある場合は、に配置され DataRow ます。If there are output parameters, they are placed in the DataRow.

  6. OnRowUpdated イベントが発生します。The OnRowUpdated event is raised.

  7. AcceptChanges が呼ばれたとき。AcceptChanges is called.

コンストラクター

OracleRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

OracleRowUpdatingEventArgs クラスの新しいインスタンスを初期化します。Initializes a new instance of the OracleRowUpdatingEventArgs class.

プロパティ

BaseCommand

このクラスのインスタンスの IDbCommand オブジェクトを取得または設定します。Gets or sets the IDbCommand object for an instance of this class.

(継承元 RowUpdatingEventArgs)
Command

OracleCommand の実行時に実行する Update(DataSet) を取得または設定します。Gets or sets the OracleCommand to execute when performing the Update(DataSet).

Errors

Command の実行時に .NET データ プロバイダーによって生成されたエラーを取得します。Gets any errors generated by the .NET data provider when the Command executes.

(継承元 RowUpdatingEventArgs)
Row

挿入、更新、または削除操作の一部としてサーバーに送信される DataRow を取得します。Gets the DataRow that will be sent to the server as part of an insert, update, or delete operation.

(継承元 RowUpdatingEventArgs)
StatementType

実行する SQL ステートメントの種類を取得します。Gets the type of SQL statement to execute.

(継承元 RowUpdatingEventArgs)
Status

UpdateStatus プロパティの Command を取得または設定します。Gets or sets the UpdateStatus of the Command property.

(継承元 RowUpdatingEventArgs)
TableMapping

DataTableMapping を通じて送信する Update(DataSet) を取得します。Gets the DataTableMapping to send through the Update(DataSet).

(継承元 RowUpdatingEventArgs)

メソッド

Equals(Object)

指定されたオブジェクトが現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(継承元 Object)
GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(継承元 Object)
GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(継承元 Object)
MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(継承元 Object)
ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(継承元 Object)

適用対象