c# 4.0 - Select Items in Listbox -


i have 2 listboxes , corresponding data stored in sql server. able load data of listbox1 sql server. not able populate corresponding data of selected item listbox 2 listbox 1. when click on items in listbox 1 no data displayed in listbox2.

private void form2_load(object sender, eventargs e)         {             sqlconnection cs = new sqlconnection(@"data source=.\sqlexpress;initial catalog=details;user id=sa;password=p@ssw0rd");             sqlcommand cmd = new sqlcommand();             cmd.connection = cs;             cmd.commandtype = commandtype.text;             cmd.commandtext = "select memo new";         dataset objds = new dataset();         sqldataadapter da = new sqldataadapter();         da.selectcommand = cmd;         // cs.open();         da.fill(objds);          //cs.close();          listmemo.valuemember = "memo";         listmemo.displaymember = "memo";         listmemo.datasource = objds.tables[0];      }       private void listmemo_selectedindexchanged(object sender, eventargs e)     {        // string memo = convert.toint32(listmemo.selectedvalue.tostring());         if (listmemo.selectedvalue.tostring() != "")         {             string memo = convert.tostring(listmemo.selectedvalue.tostring());             filltext(memo);         }       }       private void filltext(string memo)     {         sqlconnection cs = new sqlconnection(@"data source=.\sqlexpress;initial catalog=details;user id=sa;password=p@ssw0rd");         sqlcommand cmd = new sqlcommand();         cmd.connection = cs;         cmd.commandtype = commandtype.text;         cmd.commandtext = "select text new memo = '"+ listmemo.selectedvalue.tostring()  +"'" ;         //cmd.parameters.addwithvalue("@memo", listmemo);          dataset objds = new dataset();         sqldataadapter da = new sqldataadapter();         da.selectcommand = cmd;         // cs.open();         da.fill(objds);       //   cs.close();          if (objds.tables[0].rows.count >0)         {             listtext.valuemember = "text";             listtext.displaymember = "text";             listtext.datasource = objds.tables[0];          }      } 

           if (dt.rows.count > 0)             {                 objds.tables.add(dt);                 listbox1.datasource = ds.tables[0];                 listbox1.datatextfield = "text";// display member                 listbox1.datavaluefield = "";// id                  listbox1.databind();             }

bind list box..!


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