c# - WPF Bind ListBoxItem to DataGrid -

i need bind listboxitem , datagrid in following way: user doubleclicks on listboxitem , sql query performed , retrieved data shown on datagrid. here's have:

<datagrid x:name="gridstatistics" margin="0,144,0,0" /> <listbox x:name="lststat" horizontalalignment="left" height="129" margin="10,10,0,0"            verticalalignment="top" width="330" fontsize="16"           itemssource="{binding statisticsqueries}" cursor="arrow" previewmouserightbuttondown="lststat_previewmouserightbuttondown" previewmouserightbuttonup="lststat_previewmouserightbuttonup" mousedoubleclick="lststat_mousedoubleclick">       <listbox.itemtemplate>           <datatemplate>                <label content="{binding path=name}" fontweight="medium" fontsize="18" fontfamily="helveticaneuecyr"/>           </datatemplate>       </listbox.itemtemplate>       <listbox.contextmenu>           <contextmenu>                <menuitem header="show" click="menuitem_onclick" />           </contextmenu>       </listbox.contextmenu> </listbox> 

and c# code:

public observablecollection<query> statisticsqueries {get{...}}  private void lststat_mousedoubleclick(object sender, mousebuttoneventargs e) {     if (lststat.selectedindex < 0) return;     var item = lststat.selecteditem query;     using (var connection = new mysqlconnection(databasemodel.connectionstring))     {         connection.open();         if (item != null)             using (var cmd = new mysqlcommand(item.text, connection))             {                 var dt = new datatable();                 var adapter = new mysqldataadapter(cmd);                 adapter.fill(dt);                 gridstatistics.datacontext = dt;             }         connection.close();     }     e.handled = true; } 

and class query public class query : inotifypropertychanged has properties used in code, no mistakes there.

although data retrieved correctly, datagrid doesn't react @ all. maybe there mistakes in binding or setting datacontext.

could please me correctly bind listboxitem doublemouseclick , datagrid datacontext? should create separate class that?

try :  using (var cmd = new mysqlcommand(item.text, connection)) {      .      .      gridstatistics.itemssource =  dt.defaultview;  }