DbApplyChangeFailedEventArgs.Action Property
Gets or sets a ApplyAction enumeration value that specifies the action to handle the conflict.
Namespace: Microsoft.Synchronization.Data
Assembly: Microsoft.Synchronization.Data (in Microsoft.Synchronization.Data.dll)
Syntax
'Declaration
Public Property Action As ApplyAction
Get
Set
'Usage
Dim instance As DbApplyChangeFailedEventArgs
Dim value As ApplyAction
value = instance.Action
instance.Action = value
public ApplyAction Action { get; set; }
public:
property ApplyAction Action {
ApplyAction get ();
void set (ApplyAction value);
}
member Action : ApplyAction with get, set
function get Action () : ApplyAction
function set Action (value : ApplyAction)
Property Value
Type: Microsoft.Synchronization.Data.ApplyAction
A ApplyAction enumeration value that specifies the action to handle the conflict.
Remarks
If a row cannot be applied during synchronization, the ApplyChangeFailed event is raised. The DbApplyChangeFailedEventArgs object provides information about the error or conflict that caused the failure. In a handler for the event, you can respond to the event in several ways, including specifying whether the synchronization provider should try to apply the row again. For more information, see How to: Handle Data Conflicts and Errors for Database Synchronization (SQL Server).
Examples
The following code examples show how update-update conflicts can be processed in an ApplyChangeFailed event handler. In the example, the conflicting rows are displayed to the console with an option to specify which row should win the conflict. To view this code in the context of a complete example, see How to: Handle Data Conflicts and Errors for Database Synchronization (SQL Server).
localProvider.ApplyChangeFailed += new EventHandler<DbApplyChangeFailedEventArgs>(dbProvider_ApplyChangeFailed);
remoteProvider.ApplyChangeFailed += new EventHandler<DbApplyChangeFailedEventArgs>(dbProvider_ApplyChangeFailed);
if (e.Conflict.Type == DbConflictType.LocalUpdateRemoteUpdate)
{
//Get the conflicting changes from the Conflict object
//and display them. The Conflict object holds a copy
//of the changes; updates to this object will not be
//applied. To make changes, use the Context object.
DataTable conflictingRemoteChange = e.Conflict.RemoteChange;
DataTable conflictingLocalChange = e.Conflict.LocalChange;
int remoteColumnCount = conflictingRemoteChange.Columns.Count;
int localColumnCount = conflictingLocalChange.Columns.Count;
Console.WriteLine(String.Empty);
Console.WriteLine(String.Empty);
Console.WriteLine("Row from database " + DbConflictDetected);
Console.Write(" | ");
//Display the local row. As mentioned above, this is the row
//from the database at which the conflict was detected.
for (int i = 0; i < localColumnCount; i++)
{
Console.Write(conflictingLocalChange.Rows[0][i] + " | ");
}
Console.WriteLine(String.Empty);
Console.WriteLine(String.Empty);
Console.WriteLine(String.Empty);
Console.WriteLine("Row from database " + DbOther);
Console.Write(" | ");
//Display the remote row.
for (int i = 0; i < remoteColumnCount; i++)
{
Console.Write(conflictingRemoteChange.Rows[0][i] + " | ");
}
//Ask for a conflict resolution option.
Console.WriteLine(String.Empty);
Console.WriteLine(String.Empty);
Console.WriteLine("Enter a resolution option for this conflict:");
Console.WriteLine("A = change from " + DbConflictDetected + " wins.");
Console.WriteLine("B = change from " + DbOther + " wins.");
string conflictResolution = Console.ReadLine();
conflictResolution.ToUpper();
if (conflictResolution == "A")
{
e.Action = ApplyAction.Continue;
}
else if (conflictResolution == "B")
{
e.Action = ApplyAction.RetryWithForceWrite;
}
else
{
Console.WriteLine(String.Empty);
Console.WriteLine("Not a valid resolution option.");
}
}
AddHandler localProvider.ApplyChangeFailed, AddressOf dbProvider_ApplyChangeFailed
AddHandler remoteProvider.ApplyChangeFailed, AddressOf dbProvider_ApplyChangeFailed
If e.Conflict.Type = DbConflictType.LocalUpdateRemoteUpdate Then
'Get the conflicting changes from the Conflict object
'and display them. The Conflict object holds a copy
'of the changes; updates to this object will not be
'applied. To make changes, use the Context object.
Dim conflictingRemoteChange As DataTable = e.Conflict.RemoteChange
Dim conflictingLocalChange As DataTable = e.Conflict.LocalChange
Dim remoteColumnCount As Integer = conflictingRemoteChange.Columns.Count
Dim localColumnCount As Integer = conflictingLocalChange.Columns.Count
Console.WriteLine(String.Empty)
Console.WriteLine(String.Empty)
Console.WriteLine("Row from database " & DbConflictDetected)
Console.Write(" | ")
'Display the local row. As mentioned above, this is the row
'from the database at which the conflict was detected.
Dim i As Integer
For i = 0 To localColumnCount - 1
Console.Write(conflictingLocalChange.Rows(0)(i).ToString & " | ")
Next i
Console.WriteLine(String.Empty)
Console.WriteLine(String.Empty)
Console.WriteLine(String.Empty)
Console.WriteLine("Row from database " & DbOther)
Console.Write(" | ")
'Display the remote row.
For i = 0 To remoteColumnCount - 1
Console.Write(conflictingRemoteChange.Rows(0)(i).ToString & " | ")
Next i
'Ask for a conflict resolution option.
Console.WriteLine(String.Empty)
Console.WriteLine(String.Empty)
Console.WriteLine("Enter a resolution option for this conflict:")
Console.WriteLine("A = change from " & DbConflictDetected & " wins.")
Console.WriteLine("B = change from " & DbOther & " wins.")
Dim conflictResolution As String = Console.ReadLine()
conflictResolution.ToUpper()
If conflictResolution = "A" Then
e.Action = ApplyAction.Continue
ElseIf conflictResolution = "B" Then
e.Action = ApplyAction.RetryWithForceWrite
Else
Console.WriteLine(String.Empty)
Console.WriteLine("Not a valid resolution option.")
End If