Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

MemberChangeConflict Class

Represents a situation in which an attempted update fails because member values have been updated since the client last read them.

System.Object
  System.Data.Linq.MemberChangeConflict

Namespace:  System.Data.Linq
Assembly:  System.Data.Linq (in System.Data.Linq.dll)

'Declaration
Public NotInheritable Class MemberChangeConflict

The MemberChangeConflict type exposes the following members.

  NameDescription
Public propertyCurrentValueGets the current value of the member in conflict.
Public propertyDatabaseValueGets the database value of the member in conflict.
Public propertyIsModifiedGets a value that indicates whether the member data has been changed since the last database read or refresh.
Public propertyIsResolvedGets a value that indicates whether the conflict has been resolved.
Public propertyMemberGets metadata information about the member in conflict.
Public propertyOriginalValueGets the original value of the member in conflict.
Top

  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodResolve(Object)Specifies the value to set as the current value for the member in conflict.
Public methodResolve(RefreshMode)Uses a RefreshMode parameter to automatically specify the value to set as the current value for the member in conflict.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Top

' Add 'Imports System.Reflection' for this section. 
Dim db As New Northwnd("...")
'... 
Try
    db.SubmitChanges(ConflictMode.ContinueOnConflict)

Catch ex As ChangeConflictException
    Console.WriteLine("Optimistic concurrency error.")
    Console.WriteLine(ex.Message)
    For Each occ As ObjectChangeConflict In db.ChangeConflicts
        Dim metatable As MetaTable = db.Mapping.GetTable(occ.Object.GetType)
        Dim entityInConflict As Object = occ.Object

        Console.WriteLine("Table name: " & metatable.TableName)
        Console.Write("Customer ID: ")
        Console.WriteLine(entityInConflict.CustomerID)

        For Each mcc As MemberChangeConflict In occ.MemberConflicts
            Dim currVal = mcc.CurrentValue
            Dim origVal = mcc.OriginalValue
            Dim databaseVal = mcc.DatabaseValue
            Dim mi As MemberInfo = mcc.Member

            Console.WriteLine("Member: " & mi.Name)
            Console.WriteLine("current value: " & currVal)
            Console.WriteLine("original value: " & origVal)
            Console.WriteLine("database value: " & databaseVal)
            Console.ReadLine()
        Next 
    Next 
End Try

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Show:
© 2015 Microsoft