c# - Initialize dropdownlist in bootstrap modal on updating gridview row in different bootstrap tab -

i have grid view inside sites tab shows sites. binding(from sites table) code grid is:

using (var db = new databasehelper())             {                 using (var reader = db.execdataset(queries.bindsitesgrid, "cid", cus_id))                 {                     gridsite.datasource = reader;                 }                 gridsite.databind();             } 

i have 2 dropdownlists in steps tab in 2 different bootstrap modals , initializing these sites table using same bindsitesgrid query. code is(calling function inside if(!ispostback){}):

private void initializeetcadd()         {        ddletcadd.items.clear();        ddlcylsite.items.clear();        foreach (var sites in sitesadapter.getpsites(cus_id))         {             var item = new system.web.ui.webcontrols.listitem();              item.text = sites.suburb;             item.value = sites.suburb;             item.attributes.add("data-subtext", sites.site_no);             ddletcadd.items.add(item);             ddlcylsite.items.add(item);                         }         ddletcadd.items.insert(0, new system.web.ui.webcontrols.listitem("nothing selected", "0"));         ddlcylsite.items.insert(0, new system.web.ui.webcontrols.listitem("nothing selected", "0")); } 

note: getpsites using same bindsitesgrid query.

now, when update site/row in gridview updates table, calling initialize dropdownlists function after running dropdownlist in modal has old values when add new site in gridview until refresh page. gridview update code:

protected void gridsite_rowupdating(object sender, gridviewupdateeventargs e)         {             string siteno = ((textbox)gridsite.rows[e.rowindex].findcontrol("txtgsno")).text;             string sitename = ((textbox)gridsite.rows[e.rowindex].findcontrol("txtgsname")).text;             string sub = ((textbox)gridsite.rows[e.rowindex].findcontrol("txtgssub")).text;             string state = ((textbox)gridsite.rows[e.rowindex].findcontrol("txtgsstate")).text;             string notes = ((textbox)gridsite.rows[e.rowindex].findcontrol("txtgsnotes")).text;             var siteid = gridsite.datakeys[e.rowindex].value;             using (var db = new databasehelper())             {                 db.execnonquery(queries.updatesite, "@sn",siteno,"@n",sitename,"@sub",sub,"@state",state,"@notes",notes,"@siteid",siteid);                 gridsite.editindex = -1;                 bindsitegrid();             }             initializeetcadd();         } 

but same working contact dropdownlist(when add new contact dont work on update row) don't site dropdownlist in either case. difference in 2 sites grid inside update panel if has cause. know there minor missing cant find it.

if need more information please let me know. appreciated. in advance..!