Popis chyby:

Value cannot be null. Parameter name: key

StackTrace:

at System.Collections.Generic.Dictionary`2.FindEntry(TKey key) at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value) at System.Data.DataView.ResetRowViewCache() at System.Data.DataView.UpdateIndex(Boolean force, Boolean fireEvent) at System.Data.DataView.UpdateIndex(Boolean force) at System.Data.DataView.SetIndex2(String newSort, DataViewRowState newRowStates, IFilter newRowFilter, Boolean fireEvent) at System.Data.DataView.SetIndex(String newSort, DataViewRowState newRowStates, IFilter newRowFilter) at System.Data.DataView.set_Sort(String value) at WebCtrlLib.CategoryGrid.RefreshPager() at WebCtrlLib.CategoryGrid.OnPreRender(EventArgs e) at WebCtrlLib.CategoryGridSTART2015.OnPreRender(EventArgs e) at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.WebControls.WebParts.WebPart.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.WebControls.WebParts.WebPart.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)