SqlRowUpdatingEventArgs SqlRowUpdatingEventArgs SqlRowUpdatingEventArgs SqlRowUpdatingEventArgs Class

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

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

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

イベント引数: (command = System. Data. SqlClient commandType = 2 status = 0)event args: (command=System.Data.SqlClient.SQLCommand commandType=2 status=0)

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

イベント引数: (command = recordsAffected の場合は、2 = 1 row = system.string [37] status = 0) を実行します。event args: (command=System.Data.SqlClient.SQLCommand commandType=2 recordsAffected=1 row=System.Data.DataRow[37] status=0)

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

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

public static int Main() 
{
    const string CONNECTION_STRING = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer";
    const string SELECT_ALL = "select * from Products";

    //Create DataAdapter.
    SqlDataAdapter rAdapter    = new SqlDataAdapter(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] = "new product";

    //Add handlers.
    rAdapter.RowUpdating += new SqlRowUpdatingEventHandler( OnRowUpdating );
    rAdapter.RowUpdated += new SqlRowUpdatedEventHandler( OnRowUpdated );

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

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

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

private static void PrintEventArgs(SqlRowUpdatedEventArgs 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 SqlRowUpdatingEventArgs)
    PrintEventArgs(e)
End Sub 

'Handler for RowUpdated event.
Private Shared Sub OnRowUpdated(sender As Object, e As SqlRowUpdatedEventArgs)
    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 = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer"
    Const SELECT_ALL As String = "select * from Products"
    
    'Create DataAdapter.
    Dim rAdapter As New SqlDataAdapter(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) = "new product"
    
    '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 

Overloads Private Shared Sub PrintEventArgs(args As SqlRowUpdatingEventArgs)
    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 SqlRowUpdatedEventArgs)
    Console.WriteLine("OnRowUpdated")
    Console.WriteLine("  event args: (" & _
                    " command=" & _
                    args.Command.CommandText & _
                    " commandType=" & _
                    args.StatementType & _
                    " recordsAffected=" & _
                    args.RecordsAffected & _
                    " status=" & _
                    args.Status & _
                    ")")
End Sub 

注釈

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

を使用Updateする場合、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 you are 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. DataRow値は、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FirstReturnedRecord設定されていて、最初に返された結果DataRowがに配置されている場合は。If the command is set to FirstReturnedRecord, and the first returned result is placed in the DataRow.

  5. 出力パラメーターがある場合は、 DataRowに配置されます。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 が呼び出されます。AcceptChanges is called.

コンストラクター

SqlRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping) SqlRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping) SqlRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping) SqlRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

SqlRowUpdatingEventArgs 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 SqlRowUpdatingEventArgs class.

プロパティ

BaseCommand BaseCommand BaseCommand 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.

(Inherited from RowUpdatingEventArgs)
Command Command Command Command

SqlCommand 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 SqlCommand to execute when performing the Update(DataSet).

Errors Errors Errors Errors

Command の実行時に .NET Framework データ プロバイダーが生成したエラーを取得します。Gets any errors generated by the .NET Framework data provider when the Command executes.

(Inherited from RowUpdatingEventArgs)
Row Row Row 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.

(Inherited from RowUpdatingEventArgs)
StatementType StatementType StatementType 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.

(Inherited from RowUpdatingEventArgs)
Status Status Status 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.

(Inherited from RowUpdatingEventArgs)
TableMapping TableMapping TableMapping 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).

(Inherited from RowUpdatingEventArgs)

メソッド

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、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.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

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

(Inherited from Object)
GetType() GetType() GetType() 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.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() 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.

(Inherited from Object)
ToString() ToString() ToString() 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.

(Inherited from Object)

適用対象

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