I have 1 infragistic webgrid with three bands but i can load and add only one band into this grid .while adding second band its giving an exception " AllowAddNew=null" though i have declared all three bands in aspx page and they are accessible through Javascript.
Plz suggest.
Did you set AllowAddNew on your Bands to "Yes"? If that's not it, you should probably post your code so people can see what you are trying to do.
http://help.infragistics.com/NetAdvantage/ASPNET/2010.1/CLR3.5/