asp.net - Error - Object reference not set to an instance of an object -


when run following code thows following error:

"object reference not set instance of object."

protected sub createuserwizard1_load(byval sender object, byval e system.eventargs) handles createuserwizard1.load      dim sqldata new system.data.sqlclient.sqlconnection("data source=.\sqlexpress;attachdbfilename=|datadirectory|\aspnetdb.mdf;integrated security=true;user instance=true")     dim cmdselect new system.data.sqlclient.sqlcommand("select top 1 employeeid a1_admins order id desc", sqldata)     dim label11 label = createuserwizard1.createuserstep.contenttemplatecontainer.findcontrol("label11")     sqldata.open()     dim dtrreader system.data.sqlclient.sqldatareader = cmdselect.executereader()     if dtrreader.hasrows         while dtrreader.read()             label11.text = dtrreader("employeeid")         end while     end if     dtrreader.close()     sqldata.close() end sub  end class

how can fix this?

it's tough without stack trace (maybe can provide it?), guess, looking @ code following line returning null

dim label11 label = createuserwizard1.createuserstep.contenttemplatecontainer.findcontrol("label11")

and trying set it's "text" property here, though variable null (accessing property on null object)

label11.text = dtrreader("employeeid")

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