protected void gvSearchResult_Sorting(object sender, GridViewSortEventArgs e)
{
Expression <Func <Claim, bool> > predicate = null;
predicate = buildPredicate();
IQueryable <LeadView> leads = LeadsManager.SearchClaim(predicate);
bool descending = false;
if (ViewState[e.SortExpression] == null)
{
descending = false;
}
else
{
descending = !(bool)ViewState[e.SortExpression];
}
ViewState[e.SortExpression] = descending;
gvSearchResult.DataSource = leads.orderByExtension(e.SortExpression, descending);
gvSearchResult.DataBind();
}