SqlRowUpdatedEventArgs Classe

Definição

Fornece dados para o evento de RowUpdated .Provides data for the RowUpdated event.

public ref class SqlRowUpdatedEventArgs sealed : System::Data::Common::RowUpdatedEventArgs
public sealed class SqlRowUpdatedEventArgs : System.Data.Common.RowUpdatedEventArgs
type SqlRowUpdatedEventArgs = class
    inherit RowUpdatedEventArgs
Public NotInheritable Class SqlRowUpdatedEventArgs
Inherits RowUpdatedEventArgs
Herança
SqlRowUpdatedEventArgs

Exemplos

O exemplo a seguir mostra como usar os RowUpdating eventos e RowUpdated .The following example shows how to use both the RowUpdating and RowUpdated events.

O RowUpdating evento retorna esta saída:The RowUpdating event returns this output:

Argumentos de evento: (Command = System. Data. SqlClient. SqlCommand commandType = 2 status = 0)Event Arguments: (command=System.Data.SqlClient.SqlCommand commandType=2 status=0)

O RowUpdated evento retorna esta saída:The RowUpdated event returns this output:

Argumentos de evento: (Command = System. Data. SqlClient. SqlCommand commandType = 2 recordsAffected = 1 linha = System. Data. DataRow [37] status = 0)Event Arguments: (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 connectionString =
              "Integrated Security=SSPI;database=Northwind;server=MSSQL1";
    const string queryString = "SELECT * FROM Products";

    // create DataAdapter
    SqlDataAdapter adapter = new SqlDataAdapter(queryString, connectionString);
    SqlCommandBuilder builder = new SqlCommandBuilder(adapter);

    // Create and fill DataSet (select only first 5 rows)
    DataSet dataSet = new DataSet();
    adapter.Fill(dataSet, 0, 5, "Table");

    // Modify DataSet
    DataTable table = dataSet.Tables["Table"];
    table.Rows[0][1] = "new product";

    // add handlers
    adapter.RowUpdating += new SqlRowUpdatingEventHandler( OnRowUpdating );
    adapter.RowUpdated += new SqlRowUpdatedEventHandler( OnRowUpdated );

    // update, this operation fires two events
    // (RowUpdating/RowUpdated) per changed row
    adapter.Update(dataSet, "Table");

    // remove handlers
    adapter.RowUpdating -= new SqlRowUpdatingEventHandler( OnRowUpdating );
    adapter.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 connectionString As String = _
            "Integrated Security=SSPI;database=Northwind;server=MSSQL1"
        Const queryString As String = "SELECT * FROM Products"
        
        ' create DataAdapter
        Dim adapter As New SqlDataAdapter(queryString, connectionString)
        Dim builder As New SqlCommandBuilder(adapter)
        
        ' Create and fill DataSet (select only first 5 rows)
        Dim dataSet As New DataSet()
        adapter.Fill(dataSet, 0, 5, "Table")
        
        ' Modify DataSet
        Dim table As DataTable = dataSet.Tables("Table")
        table.Rows(0)(1) = "new product"
        
        ' add handlers
        AddHandler adapter.RowUpdating, AddressOf OnRowUpdating
        AddHandler adapter.RowUpdated, AddressOf OnRowUpdated
        
        ' update, this operation fires two events 
        '(RowUpdating/RowUpdated) per changed row 
        adapter.Update(dataSet, "Table")
        
        ' remove handlers
        RemoveHandler adapter.RowUpdating, AddressOf OnRowUpdating
        RemoveHandler adapter.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 
End Class 

Comentários

O RowUpdated evento é gerado quando um Update para uma linha é concluído.The RowUpdated event is raised when an Update to a row is completed.

Ao usar o Update , há dois eventos que ocorrem para cada linha de dados atualizada.When using Update, there are two events that occur for each data row updated. A ordem de execução é a seguinte:The order of execution is as follows:

  1. Os valores no DataRow são movidos para os valores de parâmetro.The values in the DataRow are moved to the parameter values.

  2. O OnRowUpdating evento é gerado.The OnRowUpdating event is raised.

  3. O comando é executado.The command executes.

  4. Se o comando for definido como FirstReturnedRecord e o primeiro resultado retornado será colocado no DataRow .If the command is set to FirstReturnedRecord, and the first returned result is placed in the DataRow.

  5. Se houver parâmetros de saída, eles serão colocados no DataRow .If there are output parameters, they are placed in the DataRow.

  6. O OnRowUpdated evento é gerado.The OnRowUpdated event is raised.

  7. AcceptChanges é chamado.AcceptChanges is called.

Construtores

SqlRowUpdatedEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

Inicializa uma nova instância da classe SqlRowUpdatedEventArgs.Initializes a new instance of the SqlRowUpdatedEventArgs class.

Propriedades

Command

Obtém ou define o SqlCommand executado quando Update(DataSet) é chamado.Gets or sets the SqlCommand executed when Update(DataSet) is called.

Errors

Obtém erros gerados pelo provedor de dados .NET quando o Command foi executado.Gets any errors generated by the .NET data provider when the Command was executed.

(Herdado de RowUpdatedEventArgs)
RecordsAffected

Obtém o número de linhas alteradas, inseridas ou excluídas pela execução da instrução SQL.Gets the number of rows changed, inserted, or deleted by execution of the SQL statement.

(Herdado de RowUpdatedEventArgs)
Row

Obtém o DataRow enviado por meio de um Update(DataSet).Gets the DataRow sent through an Update(DataSet).

(Herdado de RowUpdatedEventArgs)
RowCount

Obtém o número de linhas processadas em um lote de registros atualizados.Gets the number of rows processed in a batch of updated records.

(Herdado de RowUpdatedEventArgs)
StatementType

Obtém o tipo de instrução SQL executada.Gets the type of SQL statement executed.

(Herdado de RowUpdatedEventArgs)
Status

Obtém o UpdateStatus da propriedade Command.Gets the UpdateStatus of the Command property.

(Herdado de RowUpdatedEventArgs)
TableMapping

Obtém o DataTableMapping enviado por meio de um Update(DataSet).Gets the DataTableMapping sent through an Update(DataSet).

(Herdado de RowUpdatedEventArgs)

Métodos

CopyToRows(DataRow[])

Cópia as referências às linhas modificadas para a matriz fornecida.Copies references to the modified rows into the provided array.

(Herdado de RowUpdatedEventArgs)
CopyToRows(DataRow[], Int32)

Cópia as referências às linhas modificadas para a matriz fornecida.Copies references to the modified rows into the provided array.

(Herdado de RowUpdatedEventArgs)
Equals(Object)

Determina se o objeto especificado é igual ao objeto atual.Determines whether the specified object is equal to the current object.

(Herdado de Object)
GetHashCode()

Serve como a função de hash padrão.Serves as the default hash function.

(Herdado de Object)
GetType()

Obtém o Type da instância atual.Gets the Type of the current instance.

(Herdado de Object)
MemberwiseClone()

Cria uma cópia superficial do Object atual.Creates a shallow copy of the current Object.

(Herdado de Object)
ToString()

Retorna uma cadeia de caracteres que representa o objeto atual.Returns a string that represents the current object.

(Herdado de Object)

Aplica-se a

Confira também