GetChangesBlob (obsolete)
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.
Obsolete method
GetChangesBlob is obsolete and should not be used, because the
DataWindow Web Control for ActiveX technology is obsolete.
Applies to
|
DataWindow type |
Method applies to |
|---|---|
|
Web ActiveX |
DataWindow control |
Syntax
Web ActiveX
|
1 |
string dwcontrol.GetChangesBlob ( ) |
|
Argument |
Description |
|---|---|
|
dwcontrol |
A reference to the DataWindow control for which you |
Return value
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
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:
|
1 2 3 4 5 6 7 8 9 10 |
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 |
See also