I'm tring to remove the "(blank)" value from my columns values .
the field "aircraft" has blank values and I want to ignore the blank column.
I've tried several things from code behind (working with vb.net) and nothing happens.
If I try filtering this field from the webpage, I get an error of :
"cannot convert object of type 'system.string' to type 'telerik.web.ui.pivotgrid.core.nullvalue'