GetChangesBlob

Description

Returns changes made to a DataWindow or DataStore. You must call GetChanges first to set up the change information. This method is used primarily in distributed applications.

Applies to

DataWindow type	Method applies to
Web ActiveX	DataWindow control

Syntax

Web ActiveX

string dwcontrol.GetChangesBlob ( )

Argument	Description
dwcontrol	A reference to the DataWindow control for which you just called GetChanges

Returns

Returns a string whose value is the DataWindow change blob set up by GetChanges.

If dwcontrol is null, the method returns null.

Usage

GetChanges and GetChangesBlob are used in conjunction with SetChanges to synchronize two or more DataWindows or DataStores. For details, see GetChanges.

Examples

Example 1

These statements use GetChanges to capture changes to a DataWindow control on a client. If GetChanges succeeds, the client calls a remote object function that applies the changes to a DataStore on the server and updates the database:

blob lblb_changes

long ll_rv

ll_rv = dw_employee.GetChanges(lblb_changes)

IF ll_rv = -1 THEN

		MessageBox("Error", "GetChanges call failed!")

ELSE

		iuo_employee.UpdateData(lblb_changes)

END IF