vb.net - Unbound DataGridView add row with checkbox error -

-

this windows forms program. have unbound datagridview control 4 columns; feature id string, parts string, flats string , showonest boolean. columns defined in form designer , boolean column is, indeed, set checkbox tristate set false.

the user selects product list box , code executed populate grid

grdfeat.rows.clear() = 0 curproduct.lstfeatures.count - 1     (curproduct.lstfeatures(i))         grdfeat.rows.add(.featureid, .parts, .flats, .showonest)     end next

if allowusertoaddrows false, everthing good. setting allowusertoaddrows true, however, results in following error:

formatexception

value '' cannot converted type 'boolean'.

the error not triggered in code. it's displayed in new tab titled "no source available".

it seems pretty clear process adds new editing row trying set checkbox string value, or perhaps null. i'm new (a few months) vb.net, suspect i'm overlooking simple setting somewhere, after several hours of trying find it, i'm starting feel little foolish here.

i'd give list of things i've tried already, it's long one. :) tried go around issue adding new row manually, .add("","","",false), gives same error, though i'm telling put in checkbox.

what missing? also, can point me explanation of how new editing row thingy works?

from explained, have no real explanation problem.

a workaround may set allowusertoaddrows false before populating datagridview , set true after.


Comments

Post a Comment

Popular posts from this blog

yii2 - Yii 2 Running a Cron in the basic template -

-
i have seen instructions on running cron in advanced template, cant figure out how on basic template. have following controller in basic controllers folder. <?php namespace app\controllers; use yii\console\controller; /** * cron controller */ class croncontroller extends controller { public function actionindex() { echo "cron service runnning"; } public function actionmail($to) { echo "sending mail " . $to; } } i have navigated root of application , tried these comands yii cron php yii cron im getting unknown comand "cron" i know old question failed find actual answer this. if @ code yii exec file you'll notice requires /common/config/aliases.php file console/config/main.php. can naturally change these or copy on these advanced template. hope solves problem wanting same thing.
Read more

asp.net - 'System.Web.HttpContext' does not contain a definition for 'GetOwinContext' Mystery -

-
i realize question might seem trivial some, it's these types of things find myself fighting quite bit , want make sense of despite seeming losing battle in .net (for me anyway). so, if following: using system.web; ... applicationuser user = system.web.httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); that produces error in title , red getowincontext() , error cannot resolve symbol 'getowincontext()' however, if following (remove system.web in front of httpcontext ), works expected (or @ least no errors): using system.web; ... applicationuser user = httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); however, if (same line that's working using system.web commented out): //using system.web; ... applicationuser user = httpcontext.getowincontext().getusermana
Read more

c# - MSDN OneNote Api: Navigate to never before opened page without opening a OneNote Application Window -

-
my goal able use c# programmatically open .one section file , of section's page ids. in simple case (one have created , used section), can done following code: using microsoft.office.interop.onenote; class program { public static void processonenotefile() { application onenoteapp = new application(); string filepath = @"c:\users\admin\documents\onenote notebooks\my notebook\testsection.one"; string sectionid; onenoteapp.openhierarchy(filepath, null, out sectionid); string hierarchy; onenoteapp.gethierarchy(sectionid, hierarchyscope.hspages, out hierarchy); file.writealltext(@"c:\hierarchy.txt", hierarchy); } } from here can parse xml find pageids , go. the problem, however, want files getting else , have never opened before. when run same code on files, cannot find pageids in hierarchy, , therefore, cannot process pages. fix seems work use navigateto method open section file in onenot
Read more