Databound Text Box Value does not change programatically

[svu]

I've a winform with a few textbox. all of them are bound to dataset. the last textbox is sum of all the other textboxes. When i calculate the totals and set the last textbox.text property, the new value is not reflected.
What should be the problem ???

regards,
svu

 

[younguser]

I think that you need type conversion. Only number type can do the math job.