Recent questions tagged C#

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I have to create a color picker in my WPF application. When I click on any color, the code of that color ... you have done like this before. See Question&Answers more detail:os...

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

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c# - Where are .NET 4.0 MemoryCache performance counters?

Where are .NET 4.0 MemoryCache performance counters? I am looking for their name and I can't find any. Thank you, See Question&Answers more detail:os...

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

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181 views

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c# - SqlDataReader - How to convert the current row to a dictionary

Is there an easy way to convert all the columns of the current row of a SqlDataReader to a dictionary? using ( ... row to a dictionary } 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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c# - Expression.GreaterThan fails if one operand is nullable type, other is non-nullable

I am creating some dynamic linq and am having problems with the following exception: The binary operator ... (fExpLeft, fExpRight); See Question&Answers more detail:os...

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

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c# - What does Lambda Expression Compile() method do?

I am trying to understand AST in C#. I wonder, what exactly Compile() method from this example does. // Some code ... MSIL? Can I see the MSIL? See Question&Answers more detail:os...

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

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607 views

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c# - ASP.NET Core IHostedService manual start/stop/pause(?)

I would like to implement a recurring (timed) IHostedService instance in ASPNET Core that can be stopped and started ... of some other 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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c# - How to get a screen capture of a .Net WinForms control programmatically?

How do you programmatically obtain a picture of a .Net control? See Question&Answers more detail:os...

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

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c# - Entity Framework with MySql and Migrations failing because "max key length is 767 bytes"

[Edit] This problem was solved! See the instructions at the end of the post. [Edit 2] Ok, this thread ... -Database -Verbose and have fun! See Question&Answers more detail:os...

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

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c# - ASP.net core MVC catch all route serve static file

Is there a way to make a catch all route serve a static file? Looking at this http://blog.nbellocam.me/ ... will serve up wwwroot/index.html See Question&Answers more detail:os...

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

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156 views

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c# - How to execute code only in debug mode in ASP.NET

I have an ASP.NET web application and I have some code that I want to execute only in the debug version. How 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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239 views

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c# - GC behavior when pinning an object

While browsing through the code of PinnableObjectCache from mscorlib, I've encountered the following code: for (int ... " between the objects? See Question&Answers more detail:os...

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

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199 views

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c# - Why doesn't the CLR always call value type constructors

I have a question concerning type constructors within a Value type. This question was inspired by something that ... . Many thanks, James See Question&Answers more detail:os...

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

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386 views

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c# - Why does the DataGrid not update when the ItemsSource is changed?

I have a datagrid in my wpf application and I have a simple problem. I have a generic list and I want to ... .UpdateLayout(); } any idea ? See Question&Answers more detail:os...

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

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444 views

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c# - How to animate Margin property in WPF

I want to move animate an rectangle object to move it in x-axis. I am new to WPF animation, started out with ... I move an object in XAML WPF. See Question&Answers more detail:os...

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

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220 views

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c# - Dependency injection in ASP.NET Core 2 throws exception

I receive following exception when I try to use custom DbContext in Configure method in Startup.cs file. I ... (dbContext, ldapService); } See Question&Answers more detail:os...

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

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372 views

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c# - DLL reference not copying into project bin

Project A references Project B, and Project B references an external DDL (restored using NuGet). The DLL should ... : Using Visual Studio 2013. See Question&Answers more detail:os...

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

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349 views

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c# - Automatically pop up tablet touch keyboard on WinForms input focus

When I run a WinForms (or Delphi, see at the end) application on Windows 10 in a tablet mode, a touch ... keyboard not appear in Windows 10. See Question&Answers more detail:os...

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

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270 views

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c# - Visual Studio keeps overwriting NewtonSoft.Json.DLL with an older version

Visual Studio is overwriting the correct version of NewtonSoft.Json.DLL that I have configured in both my project ... the Newtonsoft.Json.DLL. See Question&Answers more detail:os...

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

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368 views

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c# - How to change base url of Swagger in ASP.NET core

By default when you enable swagger in ASP.NET Core project it's available on url: http://localhost:<random_port>/ ... => myCustomBasePath); }); See Question&Answers more detail:os...

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

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c# : console application - static methods

why in C#, console application, in "program" class , which is default, all methods have to be static along with static void Main(string[] args) See Question&Answers more detail:os...

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

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232 views

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c# - How to unit test an Action method which returns JsonResult?

If I have a controller like this: [HttpPost] public JsonResult FindStuff(string query) { var results = _repo. ... sure what the issue is. See Question&Answers more detail:os...

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

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337 views

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c# - TPL vs Reactive Framework

When would one choose to use Rx over TPL or are the 2 frameworks orthogonal? From what I understand Rx is ... use which and for what scenarios? See Question&Answers more detail:os...

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

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341 views

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c# - Sharing Enum with WCF Service

I have few different applications among which I'd like to share a C# enum. I can't quite figure out how ... a WCF service and other applictions? See Question&Answers more detail:os...

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

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571 views

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c# - EF Exception: String or binary data would be truncated. The statement has been terminated.?

I have read many posts related to this issue, but couldn't find an answer. I am trying to load a large amount ... can see the Email is too long. 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

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c# - How to get access token from HttpContext in .Net core 2.0

I'm trying to upgrade a project from .Net core 1.1 to .Net core 2.0 there's a lot of breaking changes. One of ... /{action=Index}/{id?}"); }); See Question&Answers more detail:os...

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

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346 views

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c# - SignalR cannot read property client of undefined

I'm trying to add SignalR to my project (ASPNET MVC 4). But I can't make it work. In the below ... created? Thanks in advance!!! Guillermo. See Question&Answers more detail:os...

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

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268 views

1 answer

c# - A vertical Separator control in a Menu, Toolbar, StackPanel, etc. - Is it possible?

I want to use the Separator control in a vertical way (Lets say in a horizontal StackPanel). Searching around I ... control in a vertical way? See Question&Answers more detail:os...

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

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241 views

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c# - Why can't I use System.ValueType as a generics constraint?

Why can't I use a constraint of where T : System.ValueType? Why does Microsoft prevent this type from being a constraint? ... { bar<T>(a); } See Question&Answers more detail:os...

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

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