Now I may have simply been puzzling over this too long, or I may be going crazy but I am having trouble reading a value set in an UltraCombo.
Here is my setup:
I have a form containing a textbox and a Tab control with 2 tabs.
Tab A just has Databound textboxes
Tab B contains an UltraCombo as well as other Textboxes, all databound. These textboxes only populate when the UltraCombo's value is changed, whether by the user, or by Databinding along with the fields on Tab A.
When the user enteres text in the search box on the main form, the Database retrieves a Dataset and populates all the Textboxes on Tab A, as well as the UltraCombo on Tab B.
The UltraCombo's ValueChanged event then fires, and so long as there is a value selected in the Combo, a second search is triggered which populates the rest of the fields on Tab B.
Now here is my problem.
When all searches have been run, the Combo does display a value, yet the the various lines of code I have listed below all show read as null when looked at during Debug and what i need to happen afterwards does not run:
ddlShipTo.Value.ToString() != ""
or
ddlShipTo.Value != null
ddlShipTo.SelectedRow.Index > -1
What am I doing wrong here?
Hi Jason,
Does the same thing happen if you switch to the tab with the combo on it first?
I have noticed some very strange behavior with DataBinding in DotNet. The CurrencyManager does not update controls that are invisible or whose handles have not been created. Do if you have a control on an inactive tab that has never been displayed and you set teh Value on that control, the first time you display it, the BindingManager will re-load the value from the data source and throw away your changes.
I found what was causing the problem here...me. There was as unhandled Null value being brought back in DataSet. It was causing the DataBinding to fall over.
Cheers