Recent questions tagged C#

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c# - How can I render html in validation message in ASP.NET MVC?

I am currently developing a registration page. When user already exists I want to provide login and reset password links for ... )) } </div> } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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327 views

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c# - how to put DisplayName on ErrorMessage format

I have something like this: [DisplayName("First Name")] [Required(ErrorMessage="{0} is required.")] [StringLength( ... 50. What's wrong? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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204 views

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c# - Injecting DbContext into service layer

How am I supposed to inject my MyDbContext into my database service layer MyService? Startup.cs public void ... puzzle am I missing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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c# - How to tell if the OS is Windows XP or higher?

I am trying to play with the Environment.OSVersion.Version object and can't really tell what version would ... ME or previous versions). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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c# - Task.WaitAll hanging with multiple awaitable tasks in ASP.NET

Below is a simplified version of the code I'm having trouble with. When I run this in a console application, it ... results... return; } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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772 views

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c# - Using Application Insights with Unit Tests?

I have an MVC web app, and I'm using Simple Injector for DI. Almost all my code is covered by unit ... issue would be much appreciated! Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

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c# - Insert bytes into middle of a file (in windows filesystem) without reading entire file (using File Allocation Table)?

I need a way to insert some file clusters into the middle of a file to insert some data. Normally, I would just ... in the middle of the file? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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c# - Autocomplete for ComboBox in WPF anywhere in text (not just beginning)

I've got a ComboBox in WPF that I've mucked around with quite a lot (it has a custom template and a custom ... have to go far more low-level? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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219 views

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c# - Worksheet get_Range throws exception

I'm using C# to manipulate an Excel worksheet. The following two pieces of code should work the same, ... to instantiate both differently? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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189 views

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c# - Can an ASP.NET 5 application be published such that the target machine doesn't need DNX installed?

From the wiki for the main "aspnet" GitHub repo: "The DNX is an SDK containing all ... gchManagedAssemblyLoadContext, AssemblyName assemblyName) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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303 views

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c# - display line breaks asp.net mvc razor

I'm using the following to make the text output the line breaks entered in a <textarea> HTML element. MvcHtmlString. ... a nicer way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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251 views

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c# - Generic logging of function parameters in exception handling

A lot of my C# code follows this pattern: void foo(string param1, string param2, string param3) { try { // ... / better way of doing this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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613 views

1 answer

c# - Make WPF textbox as cut, copy and paste restricted

How can I make a WPF textbox cut, copy and paste restricted? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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505 views

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c# - MSHTML DLL on Windows 10

I have a C# solution that makes use of Smith Html Editor (I'm developing on the main project which uses ... solution still works for Windows 7. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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533 views

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c# - Create a cryptographically secure random GUID in .NET

I want to create a cryptographically secure GUID (v4) in .NET. .NET's Guid.NewGuid( ... Security.Cryptography.RNGCryptoServiceProvider together? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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793 views

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c# - Is MemoryCache.Set() thread-safe?

The MSDN documentation for MemoryCache.Set unfortunately doesn't state explicitly whether it is thread-safe or not ... without an explicit lock? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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366 views

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c# - configSource doesn't work in system.serviceModel *or* its subsections

I'm trying to split an app.config file into multiple files to make it easier to manage the differences needed ... of-date schema or something?) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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408 views

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c# - Default camel case of property names in JSON serialization

I have a bunch of classes that will be serialized to JSON at some point and for the sake of following ... camel case unless told otherwise? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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274 views

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c# - What happens if both catch and finally blocks throw exception?

What happens if both catch and finally blocks throw exception? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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455 views

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c# - How to hide the current method from exception stack trace in .NET?

I'd like to know if there is a way to throw an exception from inside a method, but to not include ... not inside the extension method. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

1 answer

c# - Which .Net collection for adding multiple objects at once and getting notified?

Was considering the System.Collections.ObjectModel ObservableCollection<T> class. This one is strange because it has ... get-notified-for-each See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

1 answer

c# - Datatips (mouse hover over variables in debug mode) not working in Visual Studio 2012 / Win 7 64bit

When I hover my mouse over a variable when debugging a C# app in Visual Studio nothing popups. I expect to ... same version of Visual Studio. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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163 views

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c# - Is it normal to use LocalDb in production?

I know that using LocalDb is very good and easy for developement, I wonder if it's good idea ... AttachDBFilename=|DataDirectory|ProjectDB.mdf; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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174 views

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c# - How to run a .Net Core dll?

I've build my console application using dnu build command on my Mac. The output is MyApp.dll. As it is not MyApp.exe ... ("Hello from Mac"); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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355 views

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c# - Site in Azure Websites fails processing of X509Certificate2

I have site in Azure Websites (not Hosted Service) and I need processing .pfx certificates with private key there. var ... and how to fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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482 views

1 answer

c# - How to fit Windows Form to any screen resolution?

I work on VS 2008 with C#. This below code does not work for me. My form was designed in 1024 x 768 ... show me the syntax. Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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223 views

1 answer

c# - Setting a foreign key to null when using entity framework code first

I'm using the database first implementation of Entity Framework Code First as the data layer for a project, but ... Does anyone have any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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243 views

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c# - Copying winforms between projects in Visual Studio

What is the best way to copy or cut/paste a form from one project to another project within a Solution in ... the form via the form designer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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