10 Great Websites For Learning Programming
The best way to learn to program is through trial and error by working on projects that interest you
2015 is lining up to be the year of React. Lately, it has garnered a lot of attention, for front-end, mobile and server side JavaScript development.
"Currently, there is no Visual Studio integration for ASP.NET vNext, so you will build and run applications from the command line. "
Paket is a package manager for .NET and mono projects
- Project format is changing to a single JSON file
- ASP.NET MVC and Web API have been unified into a single programming model
- Project Roslyn allows for a “no-compile” developer experience while making updates
- Migration to a OWIN hosting model allows for flexibility in production web hosts (IIS or running on Linux via Mono)
Here’s the list of what’s new in this preview:
- New Razor features:
@attribute,@code,@key,@namespace, markup in@functions - Blazor directive attributes
- Authentication & authorization support for Blazor apps
- Static assets in Razor class libraries
- Json.NET no longer referenced in project templates
- Certificate and Kerberos Authentication
- SignalR Auto-reconnect
- Managed gRPC Client
- gRPC Client Factory
- gRPC Interceptors
سلام؛ وقتی در قسمت:
یک متد Async قرار میدم
IoCWrapper.RunAndDispose(() =>
{
var draftsService = IoCWrapper.GetInstance<IBlogPostDraftsService>();
draftsService.RunConvertDraftsToPostsJob();
}); IoCWrapper.RunAndDispose(async () =>
{
var draftsService = IoCWrapper.GetInstance<IBlogPostDraftsService>();
await draftsService.RunConvertDraftsToPostsJobAsync();
}); دفعه اول به درستی اجرا میشه، ولی دفعه دوم خطای زیر میده
System.ObjectDisposedException HResult=0x80131622 Message=The ObjectContext instance has been disposed and can no longer be used for operations that require a connection. Source=EntityFramework
ظاهرا در حالت Lazy Loading زمانی که آبجکتی از کش لود میشه، پراپرتیهای Navigation استثنای زیر را صادر میکنن:
The ObjectContext instance has been disposed and can no longer be used for operations that require a connection
تیکه کدی که این ارور رو بر میگردونه:
var userInRoles = user.UserInRoles.Union(user.UsersSurrogate.Where(a => a.SurrogateFromDate != null && a.SurrogateToDate != null && a.SurrogateFromDate <= DateTime.Now && a.SurrogateToDate >= DateTime.Now).SelectMany(a => a.UserInRoles));
result = userInRoles.Any(a => a.Role.FormRoles.Any(b => b.IsActive && (b.Select && b.Form.SelectPath != null && b.Form.SelectPath.ToLower().Split(',').Contains(roleName)))); 
Node.js Tools 1.0 for Visual Studio (NTVS) is now available for download! NTVS is a free, open source extension for Visual Studio 2012 and Visual Studio 2013 that turns Visual Studio into a Node.js IDE. NTVS 1.0 supports the free Visual Studio Community and Visual Studio Express for Web editions, as well as Visual Studio Professional and higher
Tooling for converting pre 2017 project to the new Visual Studio 2017 format
