DataObjectMethodType Enumeration

 
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Identifies the type of data operation performed by a method, as specified by the DataObjectMethodAttribute applied to the method.

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

Public Enumeration DataObjectMethodType

Member nameDescription
Delete

Indicates that a method is used for a data operation that deletes data.

Fill

Indicates that a method is used for a data operation that fills a DataSet object.

Insert

Indicates that a method is used for a data operation that inserts data.

Select

Indicates that a method is used for a data operation that retrieves data.

Update

Indicates that a method is used for a data operation that updates data.

The following code example demonstrates how you can apply the DataObjectMethodAttribute 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 NorthwindEmployee type exposes two different data methods: one to retrieve a set of data named GetAllEmployees, and one to delete data named DeleteEmployeeByID. The DataObjectMethodAttribute is applied to both methods.

<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 'DeleteEmployeeByID

End Class 'NorthwindData

.NET Framework
Available since 2.0
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