OracleRowUpdatingEventArgs Clase

Definición

Proporciona datos para el evento RowUpdating.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
Herencia
OracleRowUpdatingEventArgs

Ejemplos

En el ejemplo siguiente se muestra cómo utilizar los RowUpdating eventos RowUpdated y.The following example shows how to use both the RowUpdating and RowUpdated events.

El RowUpdating evento devuelve este resultado:The RowUpdating event returns this output:

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

El RowUpdated evento devuelve este resultado: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

Comentarios

El RowUpdating evento se genera antes de Update un a una fila.The RowUpdating event is raised before an Update to a row.

Cuando se Updateusa, hay dos eventos que se producen para cada fila de datos actualizada.When using Update, there are two events that occur for each data row updated. El orden de ejecución es el siguiente:The order of execution is as follows:

  1. Los valores de DataRow se mueven a los valores de parámetro.The values in the DataRow are moved to the parameter values.

  2. Se genera el evento OnRowUpdating.The OnRowUpdating event is raised.

  3. Se ejecuta el comando.The command executes.

  4. Si el comando se establece en FirstReturnedRecord, el primer resultado devuelto se coloca DataRowen.If the command is set to FirstReturnedRecord, the first returned result is placed in the DataRow.

  5. Si hay parámetros de salida, se colocan en DataRowel.If there are output parameters, they are placed in the DataRow.

  6. Se genera el evento OnRowUpdated.The OnRowUpdated event is raised.

  7. Se llama a AcceptChanges.AcceptChanges is called.

Constructores

OracleRowUpdatingEventArgs(DataRow, IDbCommand, StatementType, DataTableMapping)

Inicializa una nueva instancia de la clase OracleRowUpdatingEventArgs.Initializes a new instance of the OracleRowUpdatingEventArgs class.

Propiedades

BaseCommand

Obtiene o establece el objeto IDbCommand para una instancia de esta clase.Gets or sets the IDbCommand object for an instance of this class.

(Heredado de RowUpdatingEventArgs)
Command

Obtiene o establece la interfaz OracleCommand que se va a ejecutar al llevar a cabo Update(DataSet).Gets or sets the OracleCommand to execute when performing the Update(DataSet).

Errors

Obtiene todos los errores generados por el proveedor de datos de .NET Framework al ejecutar la propiedad Command.Gets any errors generated by the .NET Framework data provider when the Command executes.

(Heredado de RowUpdatingEventArgs)
Row

Obtiene el objeto DataRow que se enviará al servidor como parte de una operación de inserción, actualización, o eliminación.Gets the DataRow that will be sent to the server as part of an insert, update, or delete operation.

(Heredado de RowUpdatingEventArgs)
StatementType

Obtiene el tipo de instrucción SQL que se va a ejecutar.Gets the type of SQL statement to execute.

(Heredado de RowUpdatingEventArgs)
Status

Obtiene o establece UpdateStatus de la propiedad Command.Gets or sets the UpdateStatus of the Command property.

(Heredado de RowUpdatingEventArgs)
TableMapping

Obtiene DataTableMapping que se va a enviar mediante Update(DataSet).Gets the DataTableMapping to send through the Update(DataSet).

(Heredado de RowUpdatingEventArgs)

Métodos

Equals(Object)

Determina si el objeto especificado es igual que el objeto actual.Determines whether the specified object is equal to the current object.

(Heredado de Object)
GetHashCode()

Sirve como función hash predeterminada.Serves as the default hash function.

(Heredado de Object)
GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Heredado de Object)
MemberwiseClone()

Crea una copia superficial del objeto Object actual.Creates a shallow copy of the current Object.

(Heredado de Object)
ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Heredado de Object)

Se aplica a