Recent questions tagged c#

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c# - Image.Save crashing: {"Value cannot be null. Parameter name: encoder"}

I am trying to save an image into a MemoryStream but it is failing under certain conditions. Here is the code: ... any idea why is it failing? 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 can i add google-services.json in xamarin app

Hi we are developing Xamarin application where we want monitor how many peoples install application from our referral ... ? 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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c# - Gridview using a generic list as DataSource and Auto-generating columns

I'm looking to load a GridView with a generic list and have the columns be auto-generated. I am getting ... going about this completely wrong. 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# - System.IO.IOException: 'The process cannot access the file '@.txt' because it is being used by another process.'

I am new to programming and I have a question. If I have two functions, one creates a text file and writes into ... use some data from 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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c# - Passing Dictionary<string, object> to MVC Controller

I am attempting to pass a javascript object ( key value pairs ) to an MVC Controller action using AJAX. The ... works fine I am stumped.. 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

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c# - View does not refresh after change

I am having this frustrating problem. I change text in a razor view (cshtml), Start without Debugging, refresh (Ctrl+ ... or it's VS acting out 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# - The data reader is incompatible with the specified Entity Framework

I have a method that will return the bare min results from a sproc to fill a select menu. When I want the bare ... c.Name SET NOCOUNT OFF; END; 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 know that File.Copy succeeded?

The static method File.Copy(String, String) doesn't return a value. How can I know programatically if that ... answers to choose the best. 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# - Difference between Activator.CreateInstance() and typeof(T).InvokeMember() with BindingFlags.CreateInstance

Forgive me if this question has already been asked and answered. Given a class of type T, what is the ... solution preferred over the other? 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# - Int32.TryParse() or (int?)command.ExecuteScalar()

I have a SQL query which returns only one field - an ID of type INT. And I have to use it as integer in C# ... id.HasValue) { // use id.Value } 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# - Async and await in MVC 4 Controller

Every time I try to use the new Async and Await operators and return a collection of objects from a ... an asynchronous operation to complete. 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 do you set the StartPosition of a Windows Forms form using code?

Is there a way to set the StartPosition of a Windows Forms form using code? It seems whatever I try results in the ... to show it as a Dialog. See Question&Answers more detail:os...

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

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360 views

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c# - Image from URL to stream

I'm getting images from a url: BitmapImage image = new BitmapImage(new Uri(article.ImageURL)); NLBI.Thumbnail.Source ... , 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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457 views

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c# - Possible to mix object initializer and collection initializer?

I define an collection initializer with IEnumerable as instructed here: http://msdn.microsoft.com/en-us/ ... and object initializers? See Question&Answers more detail:os...

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

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460 views

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c# - Cannot build WIX project on windows 10

My WIX installer project was successfully building on windows 8.1 with Visual Studio 2015. .NET version is ... .Framework.ITask. CustomActions. See Question&Answers more detail:os...

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

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508 views

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c# - Default Filename SaveFileDialog

I would like to create SaveFileDialog with default file name from value DataGridViewCells So far I tried private void ... help me solve 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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293 views

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c# - How to register a global filter with mvc 6, asp.net 5

I'm trying to register a filter in a simple mvc application. I haven't even really written anything yet outside of the ... ", "**.vspscc" ] } See Question&Answers more detail:os...

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

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662 views

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c# - App pool identity versus impersonation identity?

I found only one thread relating to this but it did not answer the question. I'm curious to a link or ... on the detailed differences. 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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356 views

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c# - How to determine if the MethodInfo is an override of the base method

I'm trying to determine if the MethodInfo object that I get from a GetMethod call on a type instance is ... overriden in a derived class? See Question&Answers more detail:os...

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

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702 views

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c# - How to join two Lists based on common property

Suppose I have two Lists<myObject> where myObject consists of the two properties Id (of type Int) and Value ( ... using some witty Linq magic. See Question&Answers more detail:os...

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

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269 views

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c# - Extended execution not working properly?

I'm not able to get ExtendedExecution to work properly. The problem is that the Revoked event is not being ... anybody got it working correctly? See Question&Answers more detail:os...

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

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324 views

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c# - How to save a ref variable for later use?

So this works.. public MyClass(ref Apple apple) { apple = new Apple("Macintosh"); // Works fine } But is it ... . Is there a way around 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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468 views

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c# - Async TestInitialize guarantees test to fail

It is incorrect by design to have async call within TestInitialize, as TestInitialize has to happen before any TestMethod ... ); } Any thoughts? See Question&Answers more detail:os...

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

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1.3k views

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c# - The reference assemblies for framework .NETCore, Version=v5.0 were not found

I have a UWP project that was created using Visual Studio 2017. It builds fine on this machine (machine 1). ... how do I fix the problem? See Question&Answers more detail:os...

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

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582 views

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c# - Calling Thread.Abort on a thread from a ThreadPool

My co-worker is using a third-party .NET library for which we don't have the source code. We're using a ... will the ThreadPool do that for us? See Question&Answers more detail:os...

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

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316 views

1 answer

c# - How to (xml) serialize a uri

I have a class I've marked as Serializable, with a Uri property. How can I get the Uri to serialize/ ... making the property of type string? See Question&Answers more detail:os...

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

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621 views

1 answer

c# - Unsupported test framework error in NUnit

I am using NUnit testing with Visual Studio 2013. We are using NUnitTestAdapter for integration of test run ... -9bb6-4ae3-87a8-537788622f2d See Question&Answers more detail:os...

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

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604 views

1 answer

c# - How to write UTF-8 characters to a pdf file using itextsharp?

I have tried a lot on google but not able to find.. Any help is appreciated. Please find the code below:- ... .Write("Pdf file generated"); } See Question&Answers more detail:os...

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

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