c# - Null Exception declaring gridview in codebehind -

part of issue stemming embedding gridview in formview , running sql on gridview controls.

girdview markup:

<asp:gridview id="gvbfprod" runat="server" showfooter="true" autogeneratecolumns="false" datakeynames="bfprodid" datasourceid="bfprodsql" onrowcommand="gvbfprod_rowcommand">             <columns>                 <asp:templatefield showheader="false">                     <edititemtemplate>                         <asp:linkbutton id="linkbutton1" runat="server" causesvalidation="true" commandname="update" text="save"></asp:linkbutton>                         &nbsp;<asp:linkbutton id="linkbutton2" runat="server" causesvalidation="false" commandname="cancel" text="cancel"></asp:linkbutton>                     </edititemtemplate>                     <footertemplate>                         <asp:linkbutton id="buttonadd" runat="server" commandname="footerinsert" text="insert"  />                     </footertemplate>                     <itemtemplate>                         <asp:linkbutton id="linkbutton1" runat="server" causesvalidation="false" commandname="edit" text="edit"></asp:linkbutton>                         &nbsp;<asp:linkbutton id="linkbutton2" runat="server" causesvalidation="false" commandname="delete" text="delete"></asp:linkbutton>                     </itemtemplate>                 </asp:templatefield> ... 

codebehind

private gridview gvbfprod;     protected void gvbfprod_rowcommand(object sender, gridviewcommandeventargs e)     {         gvbfprod = formview1.row.findcontrol("gvbfprod") gridview;          if (e.commandname == "footerinsert" && page.isvalid)         {             // reference gridview controls             textbox txtbfid = (textbox)formview1.row.findcontrol("txtbfid");             dropdownlist ddlseries =                 (dropdownlist)gvbfprod.footerrow.findcontrol("ddlfooterseries");             textbox txtacmwelders =                 (textbox)gvbfprod.footerrow.findcontrol("txtfooteracmwelders"); ....                  // update insertparameters             bfprodsql.insertparameters.clear();              bfprodsql.insertparameters.add("bfid", txtbfid.text);             bfprodsql.insertparameters.add("seriesid", ddlseries.selectedvalue);             bfprodsql.insertparameters.add("numacmwelders", txtacmwelders.text); ...            // insert new record             bfprodsql.insert();         }     } 

the initial private gridview gvbfprod; necessary give context gridview control references due being embedded in formview. however, either isn't passing correctly or there's more need private gridview gvbfprod; line. i'm thinking latter once project built, green squiggly under gvbfprod stating field never assigned to, , have default value null. , of course when click on insert linkbutton, unhandled null exception error breaks @ (dropdownlist)gvbfprod.footerrow.... line.

do need build get/set funtions gvbfprod or there different way of passing gridview?

found causing original null exception errors. missing definition of gvbfprod in codebehind.

specifically:

private gridview gvbfprod;     protected void gvbfprod_rowcommand(object sender, gridviewcommandeventargs e)     {         gvbfprod = formview1.row.findcontrol("gvbfprod") gridview; .... 

now i'm getting different null reference exception on dropdown lists, that's different issue.