Export (0) Print
Expand All

ObjectChangeConflict Class

Represents an update attempt with one or more optimistic concurrency conflicts.

System.Object
  System.Data.Linq.ObjectChangeConflict

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

public sealed class ObjectChangeConflict

The ObjectChangeConflict type exposes the following members.

  NameDescription
Public propertyIsDeletedGets a value that indicates whether the object in conflict has been deleted from the database.
Public propertyIsResolvedGets a value that indicates whether the conflicts for this object have already been resolved.
Public propertyMemberConflictsGets a collection of all member conflicts that caused the update to fail.
Public propertyObjectGets the object in conflict.
Top

  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodResolve()Resolves member conflicts by keeping current values and resetting the baseline original values to match the more recent database values.
Public methodResolve(RefreshMode)Resolves member conflicts by using the specified RefreshMode.
Public methodResolve(RefreshMode, Boolean)Resolve member conflicts keeping current values and resetting the baseline original values.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Top

This scenario is one in which an attempted update fails because database values have been updated since the client last read them.

The following example shows how to retrieve information about objects in conflict.


Northwnd db = new Northwnd("...");

try
{
    db.SubmitChanges(ConflictMode.ContinueOnConflict);
}

catch (ChangeConflictException e)
{
    Console.WriteLine("Optimistic concurrency error.");
    Console.WriteLine(e.Message);
    foreach (ObjectChangeConflict occ in db.ChangeConflicts)
    {
        MetaTable metatable = db.Mapping.GetTable(occ.Object.GetType());
        Customer entityInConflict = (Customer)occ.Object;
        Console.WriteLine("Table name: {0}", metatable.TableName);
        Console.Write("Customer ID: ");
        Console.WriteLine(entityInConflict.CustomerID);
        Console.ReadLine();
    }
}


.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, 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.

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

Community Additions

ADD
Show:
© 2014 Microsoft