c# - gridview.databind() not getting refreshed -

i have gridview :

                            <asp:templatefield>                                 <headertemplate>                                     <asp:label id="lblheaderdesc" runat="server" cssclass="highlights_header" text="description"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:label id="lbldesc" runat="server" cssclass="reportlabel" text='<%# bind("progdesc") %>'></asp:label>                                 </itemtemplate>                             </asp:templatefield>                             <asp:templatefield>                                 <headertemplate>                                     <asp:label id="lblheaderstartdate" runat="server" cssclass="highlights_header" text="start date"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:label id="lblstartdate" runat="server" cssclass="reportlabel" text='<%# bind("startdate") %>'></asp:label>                                 </itemtemplate>                             </asp:templatefield>                             <asp:templatefield>                                 <headertemplate>                                     <asp:label id="lblheaderenddate" runat="server" cssclass="highlights_header" text="end date"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:label id="lblenddate" runat="server" cssclass="reportlabel" text='<%# bind("enddate") %>'></asp:label>                                 </itemtemplate>                             </asp:templatefield>                             <asp:templatefield itemstyle-cssclass="gridrow_amount">                                 <headertemplate>                                     <asp:label id="lblheaderbudget" runat="server" cssclass="highlights_header" text="budget amount"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:label id="lblbudget" runat="server" cssclass="reportlabel" text='<%# bind("budget") %>'></asp:label>                                 </itemtemplate>                             </asp:templatefield>                             <asp:templatefield>                                 <headertemplate>                                     <asp:label id="lblheaderstatus" runat="server" cssclass="highlights_header" text="status"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:label id="lblstatus" runat="server" cssclass="reportlabel" text='<%# bind("status") %>'></asp:label>                                 </itemtemplate>                             </asp:templatefield>                             <asp:templatefield itemstyle-cssclass="gridrow_links">                                 <headertemplate>                                     <asp:label id="lblheaderview" runat="server" cssclass="highlights_header" text="view details"> </asp:label>                                 </headertemplate>                                 <itemtemplate>                                     <asp:linkbutton id="lnkprogname" runat="server" cssclass="reportlabel" text="open"                                         onclick="lnkprogname_click"></asp:linkbutton>                                 </itemtemplate>                             </asp:templatefield>                         </columns>                         <pagerstyle backcolor="#666666" forecolor="white" horizontalalign="center" />                         <selectedrowstyle backcolor="#c5bbaf" font-bold="true" forecolor="#333333" />                         <rowstyle horizontalalign="left" cssclass="gridrow_dsm" />                         <headerstyle horizontalalign="center" cssclass="gridheaderrow" />                         <alternatingrowstyle horizontalalign="left" cssclass="gridrowalt_dsm" />                     </asp:gridview> 

in code behind using

grvprogramsearch.datasource = somedatasource // populated grvprogramsearch.databind()

however, datasource populated gridview not getting populated.

write

grvprogramsearch.databind(); 

after,

grvprogramsearch.datasource = somedatasource;