DataObjectAttribute Constructors

public:
 DataObjectAttribute();

public DataObjectAttribute();

Public Sub New ()

Voorbeelden

In het volgende codevoorbeeld ziet u hoe u de DataObjectAttribute() constructor gebruikt.

[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

Opmerkingen

De IsDataObject eigenschap wordt ingesteld true op wanneer u de DataObjectAttribute() constructor gebruikt.

public:
 DataObjectAttribute(bool isDataObject);

public DataObjectAttribute(bool isDataObject);

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

Public Sub New (isDataObject As Boolean)

Parameters

Opmerkingen

Gebruik de DataObjectAttribute(Boolean) constructor om aan te geven aan een ontwerptijdklasse, zoals de ObjectDataSourceDesigner klasse die een object moet worden uitgesloten van de lijst met geschikte objecten voor binding met een ObjectDataSource object.

De IsDataObject eigenschap is ingesteld op de waarde van de isDataObject parameter.