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DataObjectMethodAttribute Constructor (DataObjectMethodType)

Initializes a new instance of the DataObjectMethodAttribute class and identifies the type of data operation the method performs.

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

public DataObjectMethodAttribute(
	DataObjectMethodType methodType
)

Parameters

methodType
Type: System.ComponentModel.DataObjectMethodType

One of the DataObjectMethodType values that describes the data operation the method performs.

The IsDefault property is set to false when you create a DataObjectMethodAttribute object using this DataObjectMethodAttribute(DataObjectMethodType) constructor.

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.

[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());
  }
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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