Hello Rupa,
Note that by design RadInput controls set their value
after they are blurred. Based on that I suspect that the problem is caused by the fact that the post back occurs fast enough so that the control does not mannage to set its value on time. The easiest resolution is to ensure that the input is blurred before the post back is triggered. For example you can explicitly focus another control and then trigger the postback.
I hope this helps.
All the best,
Martin
the Telerik team
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