Recent questions tagged C#

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218 views

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c# - Get the index of item in a list given its property

In MyList List<Person> there may be a Person with its Name property set to "ComTruise". I need the index of ... optimal way to get the index? See Question&Answers more detail:os...

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

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213 views

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c# - Reference could not be added because of same name

Since the update to VS 2013 I have the behaviour that I cannot add a reference to 2 projects with the same name. ... still think, this is a bug. 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# - Why is SynchronizationContext.Current null in my Winforms application?

I just wrote this code: System.Threading.SynchronizationContext.Current.Post( state => DoUpdateInUIThread((Abc)state ... .Current is null 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

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c# - Can I add an implicit conversion for two classes which I don't directly control?

I'd like to be able to implicitly convert between two classes which are otherwise incompatible. One of the classes ... using to write the game. See Question&Answers more detail:os...

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

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235 views

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c# - Difference between this and base

I am interested to know the difference between this and base object in C#. What is the best practice when using them? See Question&Answers more detail:os...

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

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202 views

1 answer

c# - What is the maximum amount of characters or length for a Directory?

What is the maximum amount of characters that a typical path can contain for a directory when using C#? For ... what is the maximum length? 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# - TPL Dataflow, how to forward items to only one specific target block among many linked target blocks?

I am looking for a TPL data flow block solution which can hold more than a single item, which can link ... . Any ideas are highly appreciated. See Question&Answers more detail:os...

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

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334 views

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c# - Does casting double to float always return same value?

Does casting double to float always produce same result, or can there be some "rounding differences"? For example ... works on other languages. See Question&Answers more detail:os...

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

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213 views

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c# - Get item count of a list<> using Linq

I want to query a List<> and find out how MANY items match the selection criteria. using LINQ and c# /. ... =="Special Book" select n; See Question&Answers more detail:os...

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

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273 views

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c# - Why do I NOT get warnings about uninitialized readonly fields?

The C# compiler is kind enough to give you a "field is never assigned to" warning if you forget to ... visible only within its package. See Question&Answers more detail:os...

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

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321 views

1 answer

c# - SQL Query says a parameter is not supplied, but is added to the SqlCommand object

I have a stored procedure that has a parameter called UserName and in my code behind I have a SqlCommand ... where Users.Email = @UserName See Question&Answers more detail:os...

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

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451 views

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c# - Why anonymous methods inside structs can not access instance members of 'this'

I have a code like the following: struct A { void SomeMethod() { var items = Enumerable.Range(0, 10).Where( ... explains what's going on here. 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

1 answer

c# - Adding .NET Framework DLL as reference to windows store app

I'm working on a windows store app project where I want to read a simple temperature measurement data from a ... walk around tricks out there? See Question&Answers more detail:os...

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

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338 views

1 answer

c# - Reading attribute values with XmlReader

I have an XML file that I'm trying to read from here, and have the following code: using System; using System. ... value: "F", and so on. See Question&Answers more detail:os...

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

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200 views

1 answer

c# - Code for adding to IEnumerable

I have an enumerator like this IEnumerable<System.Windows.Documents.FixedPage> page; How can I add a page (eg: D ... But nothing worked for me. See Question&Answers more detail:os...

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

0 votes

315 views

1 answer

c# - MVC5 Razor NullReferenceException in Model

For some reason I'm getting a NullReferenceException whenever I try to access my model. Here is the code from ... a solution for 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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612 views

1 answer

c# - How to write a getter and setter for a Dictionary?

How do you define a getter and setter for complex data types such as a dictionary? public Dictionary<string, ... of the whole dictionary? See Question&Answers more detail:os...

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

0 votes

230 views

1 answer

c# - Why do we have to name interface method parameters?

In C# we have to name the parameters of a method of an interface. I understand that even if we didn't have ... those in the interface's method. See Question&Answers more detail:os...

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

0 votes

519 views

1 answer

c# - Winforms: Close modal dialog when clicking outside the dialog

I have an open modal dialog (Windows Forms). I want, that the dialog is closed when clicking outside the dialog (on ... ). 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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476 views

1 answer

c# - Using fiddler with Windows Authentication

I am testing some proxy settings for our application but I need to test a proxy that requires Windows Authentication ( ... 1" / "1" credentials? See Question&Answers more detail:os...

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

0 votes

948 views

1 answer

c# - How to disable horizontal scroll bar in FlowLayoutPanel?

I have a FlowLayoutPanel and there are multiple controls on it. I only want to scroll in vertical direction. ... vertical scroll bar working? See Question&Answers more detail:os...

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

0 votes

258 views

1 answer

c# - force a string to 2 decimal places

i have a repeater item that displays a double. occasionally the double seems to be coming out with 3 decimal places ... ())%> any ideas 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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282 views

1 answer

c# - How To Convert A Number To an ASCII Character?

I want to create an application where user would input a number and the program will throw back a character ... a ascii character into number? See Question&Answers more detail:os...

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

0 votes

393 views

1 answer

c# - Group List of Objects based on Property using Linq?

I have an object: public class SiteInfo { public string Title { get; set; } public string URL { get; set; ... using LINQ or some other method. See Question&Answers more detail:os...

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

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230 views

1 answer

c# - Method overloads which differ only by generic constraint

I've run into a bit of a problem, which I simply cannot find a good work-around to. I want to have ... DbTable (which is an abstract class). See Question&Answers more detail:os...

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

0 votes

589 views

1 answer

c# - Async and Await with HttpWebRequest.GetResponseAsync

I am trying to use Async and Await when making a web request and am finding that it never gets past the ... causing the await to never return? See Question&Answers more detail:os...

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

0 votes

241 views

1 answer

c# - Access a control inside a the LayoutTemplate of a ListView

How do I access a Control in the LayoutTemplate of a ListView control? I need to get to litControlTitle ... via the OnLayoutCreated event? See Question&Answers more detail:os...

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

0 votes

311 views

1 answer

c# - Is if(var == true) faster than if(var != false)?

Pretty simple question. I know it would probably be a tiny optimization, but eventually you'll use enough if statements ... be using it now. ;) See Question&Answers more detail:os...

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

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