Previously,I use hiddenfields to save the additional values for database manipulation.
so,by this i got too many control on webpage.and it show me error which i described.
to get rid of this error i do these steps.
<appSettings>
<add key="aspnet:MaxHttpCollectionKeys" value="5001" />
</appSettings>
and
I have updated the HiddenFields to Literals & everything is working as it should.