DataObjectAttribute Construtores

public:
 DataObjectAttribute();

public DataObjectAttribute();

Public Sub New ()

Exemplos

O seguinte exemplo de código demonstra o uso do DataObjectAttribute() construtor.

[DataObjectAttribute]
public class NorthwindData
{  
  public NorthwindData() {}

  [DataObjectMethodAttribute(DataObjectMethodType.Select, true)]
  public static IEnumerable GetAllEmployees()
  {
    AccessDataSource ads = new AccessDataSource();
    ads.DataSourceMode = SqlDataSourceMode.DataReader;
    ads.DataFile = "~//App_Data//Northwind.mdb";
    ads.SelectCommand = "SELECT EmployeeID,FirstName,LastName FROM Employees";
    return ads.Select(DataSourceSelectArguments.Empty);
  }

  // Delete the Employee by ID.
  [DataObjectMethodAttribute(DataObjectMethodType.Delete, true)]
  public void DeleteEmployeeByID(int employeeID)
  {
    throw new Exception("The value passed to the delete method is "
                         + employeeID.ToString());
  }
}

<DataObjectAttribute()> _
Public Class NorthwindData

  <DataObjectMethodAttribute(DataObjectMethodType.Select, True)> _
  Public Shared Function GetAllEmployees() As IEnumerable
    Dim ads As New AccessDataSource()
    ads.DataSourceMode = SqlDataSourceMode.DataReader
    ads.DataFile = "~/App_Data/Northwind.mdb"
    ads.SelectCommand = "SELECT EmployeeID,FirstName,LastName FROM Employees"
    Return ads.Select(DataSourceSelectArguments.Empty)
  End Function 'GetAllEmployees

  ' Delete the Employee by ID.
  <DataObjectMethodAttribute(DataObjectMethodType.Delete, True)> _
  Public Sub DeleteEmployeeByID(ByVal employeeID As Integer)
    Throw New Exception("The value passed to the delete method is " + employeeID.ToString())
  End Sub

End Class

Observações

A IsDataObject propriedade é definida para true quando usas o DataObjectAttribute() construtor.

public:
 DataObjectAttribute(bool isDataObject);

public DataObjectAttribute(bool isDataObject);

new System.ComponentModel.DataObjectAttribute : bool -> System.ComponentModel.DataObjectAttribute

Public Sub New (isDataObject As Boolean)

Parâmetros

Observações

Use o DataObjectAttribute(Boolean) construtor para indicar a uma classe em tempo de design, como a classe, ObjectDataSourceDesigner que um objeto deve ser excluído da lista de objetos adequados para ligação a um ObjectDataSource objeto.

A IsDataObject propriedade é definida para o valor do isDataObject parâmetro.