c# - int.Parse Value cannot be null for non-null string -



c# - int.Parse Value cannot be null for non-null string -

despite checking whether input string not null or empty, i'm getting value cannot null exception when parsing string integer. haven't debugged yet actual value beingness passed function because have if not string null or empty before seek parse.

int groupcredits = 0; if (!string.isnullorempty(course.credits)) groupcredits += int.parse(course.credits);

exception:

system.argumentnullexception: value cannot null. parameter name: string @ system.number.stringtonumber(string str, numberstyles options, numberbuffer& number, numberformatinfo info, boolean parsedecimal) @ system.number.parseint32(string s, numberstyles style, numberformatinfo info) @ system.int32.parse(string s)

c#

Comments

Post a Comment

Popular posts from this blog

ruby on rails - Devise Logout Error in RoR -

ruby on rails - Devise Logout Error in RoR - while using devise in ror, encountering unusual error when trying log out url different root url. displays me : actioncontroller::invalidauthenticitytoken in devise::sessionscontroller#destroy" for illustration if rooting path after log in '/structure', , seek log out '/general' error, while logging out '/structure' fine. any help highly appreciated. ruby-on-rails ruby devise
Read more

model view controller - MVC Rails Planning -

model view controller - MVC Rails Planning - i'm starting rails , i'm building app stores films info, user can watch film , give grade on web application. i have coded cinema model, controller , views. now, have 2 questions: should need create model , controller grading? in case, should create or should wait , create first users model , controller? yes, on model , controller grades. that'd feasible way maintain track of who's graded what. it's create first, i'd start users, since grades depend on both films , users. ruby-on-rails model-view-controller
Read more

php - Working with pretty urls on apache and fastcgi after hhvm installation -

php - Working with pretty urls on apache and fastcgi after hhvm installation - i needed slim php work pretty urls using .htaccess , no problem. rewriteengine on rewritecond %{request_filename} !-f rewriterule ^ index.php [qsa,l] now ran using hhvm, fastcgi using virtual host config. <virtualhost *:80> servername project.dev serveralias www.project.dev documentroot /var/www/project proxypassmatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/project/$1 <directory "/var/www/project"> allowoverride order allow,deny allow </directory> </virtualhost> of course, won't read .htaccess file, thought of adding .htaccess config in virtual host config, no, won't work. like so: <virtualhost *:80> servername project.dev serveralias www.project.dev documentroot /var/www/project proxypassmatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/project/$1 <directory "/var/www/project"...
Read more