asp.net - EnableViewState causing loss of value -


using vb.net 4.5 , telerik 2017.2.711.45 (q2) trying radgrid filter expressions , public string variable persist across postbacks.

with enableviewstate=false, radgrid filter expressions do not persist through postback, public string variable (stringvar) does persist.

when set enableviewstate=true filter expressions in radgrid do persist, causes stringvar not persist.

from understanding of viewstate, makes no sense setting enableviewstate=true cause stringvar not persist across postbacks. love know why occurring , resolve this.

edit: highlighted line error thrown because reporttitle no longer has value.

partial class displayxslgrid     public reporttitle string     public reportsdb reportdatabase     protected sub page_load(byval sender object, byval e system.eventargs) handles me.load         page.enableviewstate = true         reports = new reportdatabase.global_functions(system.web.httpcontext.current)      end sub      protected sub radgrid1_needdatasource(sender object, e telerik.web.ui.gridneeddatasourceeventargs) handles radgrid1.needdatasource         call bindradgrid1()      end sub      protected sub radgrid1_itemcommand(byval source object, byval e telerik.web.ui.gridcommandeventargs) handles radgrid1.itemcommand         dim strreporttitle string          select case e.commandname             case radgrid.exporttoexcelcommandname, radgrid.exporttowordcommandname, radgrid.exporttocsvcommandname

strreporttitle = reporttitle.trim

        end select      end sub      public sub bindradgrid1()         dim strreporttitle string         dim dt datatable = nothing          reporttitle = dt.rows(0).item("reporttitle")         strreporttitle = dt.rows(0).item("reporttitle").tostring         'radgrid1 data source gets set here along other stuff      end sub end class

using view state normal, , telerik controls need preserve values across post-backs. public string property on page class should not persist, , should set/calculated every time. if absolutely need persist, save value in hidden server control, or have in querystring of url.


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