Recent questions tagged C#

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510 views

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c# - Control difference between Hide() and Visible?

I was wondering about the difference between using a Control's Hide() method compared to setting the Visible property ... one 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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623 views

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c# - Adding controls to TableLayoutPanel dynamically during runtime

I have a TableLayoutPanel starting with two columns and 0 rows. What I need to do is, dynamically adding a row ... be Panel, right Label 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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342 views

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c# - Excel Interop - Add a new worksheet after all of the others

I am trying to add a new worksheet to an Excel workbook and make this the last worksheet in the book in ... using C# Excel Interop? 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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663 views

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c# - Difference between StackExchange.Redis and ServiceStack.Redis

Someone can explain the difference about ServiceStack.Redis and StackExchange.Redis c# libraries? See Question&Answers more detail:os...

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

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278 views

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c# - Convert string decimal to int

I have a string "246246.246" that I'd like to pass to the IConvertable interface, ToInt16, ToInt32, ... .ToInt64(Convert.ToDouble(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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272 views

1 answer

c# - Double.IsNaN test 100 times faster?

I found this in the .NET Source Code: It claims to be 100 times faster than System.Double. ... 0x7FFFFFFFFFFFFFFFL) > 0x7FF0000000000000L; } See Question&Answers more detail:os...

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

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192 views

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c# 4.0 - Running a Windows Service in Console mode?

I found some sample code posted at https://groups.google.com/group/microsoft.public.dotnet.languages.csharp/browse_thread ... ..} #endregion } } See Question&Answers more detail:os...

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

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229 views

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c# replace " characters

I am sent an XML string that I'm trying to parse via an XmlReader and I'm trying to strip out the " ... plus several other ways. 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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388 views

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c# - Re-enable title bar in Visual Studio 2019

I've downloaded the preview version of Visual Studio 2019 and the title bar is disabled by default. This ... the preview features option)? See Question&Answers more detail:os...

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

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362 views

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c# - Why does the ASP.Net MVC model binder bind an empty JSON array to null?

Here is my model class: public class MyModel { public Employees[] MyEmpls{get;set;} public int Id{get;set; ... to achieve an empty array? See Question&Answers more detail:os...

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

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188 views

1 answer

c# - Switch statement without default when dealing with enumerations

This has been a pet peeve of mine since I started using .NET but I was curious in case I was missing ... altered my opinion about .NET enums. See Question&Answers more detail:os...

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

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510 views

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c# - High-Performance Timer vs StopWatch

Does anyone know if the HiPerfTimer or the StopWatch class is better for benchmarking, and why? See Question&Answers more detail:os...

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

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299 views

1 answer

c# - Is it possible to handle exceptions within LINQ queries?

Example: myEnumerable.Select(a => ThisMethodMayThrowExceptions(a)); How to make it work even if it throws ... exceptions is thrown... See Question&Answers more detail:os...

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

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374 views

1 answer

c# - Entity Framework: A referential integrity constraint violation on many to many relationship

Hey I have an application with a bunch of inproc caching and entity framework. When I want to write an update ... off the model for simplicity) See Question&Answers more detail:os...

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

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277 views

1 answer

c# - How to create 1024x1024 RGB bitmap image of white?

It's embarrassing to ask this question but can't find an answer. I tried this in vain. Image resultImage = new Bitmap ... C#. How can I do that? See Question&Answers more detail:os...

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

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495 views

1 answer

c# - Attribute routing with optional parameters in ASP.NET Web API

I'm trying to use Web API 2 attribute routing to set up a custom API. I've got my route working such that my function ... = "") { // process } } See Question&Answers more detail:os...

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

0 votes

307 views

1 answer

c# - How to deal with a sealed class when I wanted to inherit and add properties

In a recent question on Stack Overflow, I asked how I might parse through a file name to extra meta info ... way to deal with this 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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262 views

1 answer

c# - Determine if reflected property can be assigned null

I wish to automagically discover some information on a provided class to do something akin to form entry. Specifically ... is not an option. See Question&Answers more detail:os...

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

0 votes

766 views

1 answer

c# - Cannot compare elements of type 'System.Collections.Generic.ICollection`1 Only primitive types, enumeration types and entity types are supported

I have written this code IQueryable<Site> sites = context.MainTable.Include("RelatedTable"); if (!string. ... entity types are supported. 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

1 answer

c# - Appending/concatenating two IEnumerable sequences

I have two sets of datarows. They are each IEnumerable. I want to append/concatenate these two lists into one list ... the two Lists. Any ideas? See Question&Answers more detail:os...

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

0 votes

639 views

1 answer

c# - The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF, In WinForms?

I am trying to use a WebClient / HttpWebRequest to download some data from a server. I use the following code ... there to fix this 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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328 views

1 answer

c# - Remove ClickOnce from a WinForms app

I have a WinForms application that was going to use ClickOnce. But it turns out ClickOnce won't work for my ... hoping there's another 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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468 views

1 answer

c# - Difference between ToString("N2") and ToString("0.00")

What is the difference between ToString("N2") and ToString("0.00")? See Question&Answers more detail:os...

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

0 votes

504 views

1 answer

c# - How to read "List Separator" settings from Regional configuration of control panel?

I'm making multi culture plugin for MS Word,Excel where I need to identify setting value provided in Regional ... mail merge header, 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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244 views

1 answer

c# - How to go to particular Item in IEnumerable

I have IEnumerable which contains number Data inside it. Edit The IEnumerable is from System.Collection.Ienumerable ... please. Thanks, Subhen See Question&Answers more detail:os...

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

0 votes

299 views

1 answer

c# - Get domain name

My computer is in a Domain (Active Directory) and I need to get the domain name dynamically. I ... the UserDomainName returns only something. See Question&Answers more detail:os...

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

0 votes

448 views

1 answer

c# - Changing the scheme of System.Uri

I'm looking for canonical way of changing scheme of a given System.Uri instance with System.UriBuilder without crappy ... , query string, 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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263 views

1 answer

c# - return type is less accessible than method

I am new to c# and here is an excerpt from a personal project i am working on to get some experience. When ... } return listOfRecipes[i]; } } See Question&Answers more detail:os...

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

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