c# - Not able to insert. Doesn't show any errors but doesn't insert as well -

this insert statement. records not inserting no errors showing also. please help

protected void btn_add_click(object sender, eventargs e) {       if (btn_add.text == "submit")     {          string height = txtheight.text;         string topdia = convert.tostring(txttopdiameter.text);         string bottomdia = convert.tostring(txtbottomdiameter.text);         string shaftthick = convert.tostring(txtshaftthick.text);         string blackwt = convert.tostring(txtblackweight.text);         string totmanhrperpole = convert.tostring(txttotmanhrpoledata.text);         string plate_length = convert.tostring(txtplatelength.text);         string plate_dia = convert.tostring(txtplatedia.text);         string plate_thickness = convert.tostring(txtplatethick.text);         system.collections.hashtable ht = (system.collections.hashtable)session["userdetails"];         int64 usrid = (int64)ht["userid"];         string createdby = convert.tostring(usrid);         string foundboltid = convert.tostring(ddlfoundationbolt.selectedvalue);         string poletypeid = convert.tostring(ddlpoltype.selectedvalue);         string producttypeid = convert.tostring(ddlpdttype.selectedvalue);          string status = chkactive.checked ? "true" : "false";         string filename = path.getfilename(fileuploadimages.postedfile.filename);         fileuploadimages.saveas(server.mappath("~/images/pole data/" + filename));          try         {             sqlconnection con = new sqlconnection(configurationmanager.connectionstrings["valmont"].tostring());             con.open();             sqlcommand cmd = new sqlcommand("insert def_pole_data_mst(height,topdia,bottomdia,shaftthick,blackwt,totmanhrperpole,plate_length,plate_dia,plate_thickness,createdby,foundboltid,poletypeid,producttypeid,status,imagepath) values(@height,@topdia,@bottomdia,@shaftthick,@blackwt,@totmanhrperpole,@plate_length,@plate_dia,@plate_thickness,@createdby,@foundboltid,@poletypeid,@producttypeid,@status,@imagepath)", con);              cmd.parameters.addwithvalue("@height", height);             cmd.parameters.addwithvalue("@topdia", topdia);             cmd.parameters.addwithvalue("@bottomdia", bottomdia);             cmd.parameters.addwithvalue("@shaftthick", shaftthick);             cmd.parameters.addwithvalue("@blackwt", blackwt);             cmd.parameters.addwithvalue("@totmanhrperpole", totmanhrperpole);             cmd.parameters.addwithvalue("@plate_length", plate_length);             cmd.parameters.addwithvalue("@plate_dia", plate_dia);             cmd.parameters.addwithvalue("@plate_thickness", plate_thickness);             cmd.parameters.addwithvalue("@createdby", createdby);             cmd.parameters.addwithvalue("@foundboltid", foundboltid);             cmd.parameters.addwithvalue("@poletypeid", poletypeid);             cmd.parameters.addwithvalue("@producttypeid", producttypeid);             cmd.parameters.addwithvalue("@status", status);             cmd.parameters.addwithvalue("@imagepath", "~/images/pole data/" + filename);             cmd.executenonquery();             con.close();              bindgrid();             accordian.selectedindex = 1;             jquerydisplay.showalertmessage("record inserted successfully");              clerafields();          }         catch (exception ex)         {             jquerydisplay.showalertmessage(ex.message);         }                 {          }     } 

here's table: