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DataObjectMethodAttribute Constructor (DataObjectMethodType, Boolean)

Initializes a new instance of the DataObjectMethodAttribute class, identifies the type of data operation the method performs, and identifies whether the method is the default data method that the data object exposes.

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

public DataObjectMethodAttribute(
	DataObjectMethodType methodType,
	bool isDefault


Type: System.ComponentModel.DataObjectMethodType
One of the DataObjectMethodType values that describes the data operation the method performs.
Type: System.Boolean
true to indicate the method that the attribute is applied to is the default method of the data object for the specified methodType; otherwise, false.

The following code example demonstrates how you can apply the DataObjectMethodAttribute attribute to a publicly exposed method and identify the type of data operation it performs as well as whether it is the type's default data method. In this example the NorthwindData type exposes two data methods: one to retrieve a set of data named GetAllEmployees, and another to delete data named DeleteEmployeeByID. The DataObjectMethodAttribute attribute is applied to both methods, the GetAllEmployees method is marked as the default method for the Select data operation, and the DeleteEmployeeByID method is marked as the default method for the Delete data operation.

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());

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.