Recent questions tagged C#

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c# - Entity Framework - Unable to load the specified metadata resource

I realise that this has been asked a number of times but I just can't seem to get the bottom of my issue ... 4.5 on the server unfortunately. 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# - Why does this Linq Cast Fail when using ToList?

Consider this contrived, trivial example: var foo = new byte[] {246, 127}; var bar = foo.Cast<sbyte>(); var baz ... bar.Select(x => x).ToList(); See Question&Answers more detail:os...

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

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465 views

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c# - Subtracting two dates

I have two calendars and each return a DateTime from calendar.SelectedDate. How do I go about subtracting the ... TimeSpan instead of DateTime. 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# - This is Thread-Safe right?

Just checking... _count is being accessed safely, right? Both methods are accessed by multiple threads. private int _count ... errors, etc... } 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# - JSON.NET DeserializeObject to List of Objects

I'm trying to Deserialize object to list of object using JSON.NET lib. My json file is: [ { "id": 1, "name" ... string image { get; set; } } See Question&Answers more detail:os...

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

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353 views

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c# - Bind dictionary to repeater

I have a dictionary object <string, string> and would like to bind it to a repeater. However, I'm not ... dictionary to display in a repeater? See Question&Answers more detail:os...

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

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468 views

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c# - Serialize an object directly to a JObject instead of to a string in json.net

How might one serialize an object directly to a JObject instance in JSON.Net? What is typically done is to ... serialize directly to a JObject? See Question&Answers more detail:os...

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

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180 views

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c# - Does Application.EnableVisualStyles() do anything?

I'm very picky when it comes to understanding a new language, and recently I've taken up learning C#. So I like ... it doing that I'm 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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c# - How to add claims in a mock ClaimsPrincipal

I am trying to unit test my controller code which gets the information from the ClaimsPrincipal.Current. In the ... the mock claim. 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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212 views

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c# - Selecting which project under a solution to debug or run in Visual Studio 2010

This one should be easy. I just can't figure out what to search for... For this one solution I created a unit ... will run when I want it to? See Question&Answers more detail:os...

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

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440 views

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c# - How do i exit a List<string>.ForEach loop when using an anonymous delegate?

In a normal loop you can break out of a loop using break. Can the same be done using an anonymous delegate? ... to see if i missed 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# - Difference between Synchronization Context and Dispatcher

I am using Dispatcher to switch to UI thread from external like this Application.Current.Dispatcher.Invoke(myAction); ... should be used?. See Question&Answers more detail:os...

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

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262 views

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c# - How to find the file by its partial name?

How can I get the full filename? For example: I have a file named 171_s.jpg that is stored on the hard disc ... name. How can I implement 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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406 views

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c# - "Object can be disposed of more than once" error

When I run code analysis on the following chunk of code I get this message: Object 'stream' can be disposed ... eliminate the error. Any help? See Question&Answers more detail:os...

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

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264 views

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c# - Specify constructor for the Unity IoC container to use

I'm using the Unity IoC container for resolving my objects. However, I've run into an issue. When I have ... = Container.Resolve<Person>(); See Question&Answers more detail:os...

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

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665 views

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c# - Cannot implicitly convert type 'System.DateTime?' to 'System.DateTime'. An explicit conversion exists

I am trying to convert DateTime? to DateTime but I get this Error: Error 7 Cannot implicitly convert type 'System. ... +")"; return date; } See Question&Answers more detail:os...

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

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284 views

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c# - Await for list of Tasks

I'm trying to do something like this: foreach (var o in ObjectList) { CalculateIfNeedToMakeTaskForO(o); if (yes ... elegant, more "correct") See Question&Answers more detail:os...

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

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427 views

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c# - int.TryParse syntatic sugar

int.TryPrase is great and all, but there is only one problem...it takes at least two lines of code to use ... I plan on using Reddogs solution. See Question&Answers more detail:os...

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

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329 views

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c# - Do you need to call Flush() on a stream or writer if you are using the “using” statement?

I am not sure whether I need to call Flush() on the used objects if I write something like this: using (FileStream ... 't (if that can happen)? See Question&Answers more detail:os...

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

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452 views

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c# - Inline variable declaration not compiling

I've been getting a message in Visual Studio 2017, specifically, IDE0018 Variable declaration can be inlined. So I try ... in range 1 to 6. See Question&Answers more detail:os...

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

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254 views

1 answer

c# - Check if a service exists on a particular machine without using exception handling

Don't know if there is a better way to do this, so that is the reason for the question. I can check if a ... controller.Dispose(); } } } } } 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# - Math operations with null

Please explain why this test passes? [Test] public void TestNullOps() { Assert.That(10 / null, Is.Null); ... the last assertion doesn't fail? See Question&Answers more detail:os...

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

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272 views

1 answer

c# - Replace Console.WriteLine in NUnit

I haven't done much with NUnit before, but I just wanted to dump some text to a window in a console type ... that, but it would be convenient. See Question&Answers more detail:os...

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

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319 views

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c# - Interfaces and async methods

I have an application. This application uses an interface to access the database. This interface can be ... others will be synchronous. See Question&Answers more detail:os...

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

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225 views

1 answer

c# - How do I get unit tests to run on a x64 platform

I have a C# application that must run in x64 mode. The problem is I try to create unit tests that run methods ... . Is there any fix for 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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730 views

1 answer

c# - How to fix "'System.AggregateException' occurred in mscorlib.dll"

I'm receiving an unhandled exception while debugging, and the program stops executing. The debugger doesn't show ... which is pretty similar. See Question&Answers more detail:os...

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

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179 views

1 answer

c# - ADO.NET - The Size property has an invalid size of 0

I'm trying to get output value from DB via ADO.NET. There's a client code: using (var connection = new ... make it work without passing size? See Question&Answers more detail:os...

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

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769 views

1 answer

c# - Text alignment in a WPF DataGrid

How can I align the column data to center in a WPF DataGrid? See Question&Answers more detail:os...

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

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