Recent questions tagged C#

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c# - converting sql server rowversion to long or ulong?

What is the proper type for the rowversion (timestamp) data type? I know it is 8 bytes but i ... = BitConverter.GetBytes(ulongConversion); 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

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c# - Setting correct icon for Shortcut in VS2010 Setup Project

I have a small app with a setup project. If I create a shortcut to my Primary Output, then this gets a ... Setup icon to change as well. See Question&Answers more detail:os...

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

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484 views

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c# - Call to await GetFileAsync() never returns and app hangs in WinRT app

I'm attempting to load and read a settings file on application launch, and about 90% of the time, the await ... idea of what's happening 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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279 views

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c# - Why can't we add a Web API as a "service reference" in Visual Studio the same way we can with WCF or ASMX?

I've decided to use Web API (as a middle tier) for an app I'm developing, but can't seem to figure out how ... same way a WCF or ASMX is added? See Question&Answers more detail:os...

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

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488 views

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c# - How to group dates by week?

I am writing an Excel exporter for a bespoke application I am creating, and I have a question about LINQ grouping in ... 24/12/2011) 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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248 views

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c# - How turn off pluralize table creation for Entity Framework 5?

I am trying to use Entity Framework 5. The first problem was that EF creats tables automatically. I tried ... (without OnModelCreating 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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287 views

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c# - Select records that does not exist in another table in Entity Framework

I have two tables - "Customer" table and "Blacklist" customer table. When I blacklist a customer, I put the customerid as ... --------- (CusId) See Question&Answers more detail:os...

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

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296 views

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c# - The best way to get a count of IEnumerable<T>

Whats the best/easiest way to obtain a count of items within an IEnumerable collection without enumerating over all of ... with LINQ or Lambda? See Question&Answers more detail:os...

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

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304 views

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c# - How to generate XML documentation for CSPROJ with multiple targets

I have a library project that has multiple targets, e.g. in the CSPROJ file it has: <TargetFrameworks> ... this documented anywhere else online See Question&Answers more detail:os...

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

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224 views

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c# - EntityFramework code first: Set order of fields

I am using EntityFramework with the "Code first" approach with migrations. I have successfully generated tables from my ... (SqlServer) v1.1.0. See Question&Answers more detail:os...

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

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189 views

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c# - Differences between Dictionary.Clear and new Dictionary()

What are the key differences between Dictionary.Clear and new Dictionary() in C#? Which one is recommended for which cases? 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

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c# - How to configure Visual Studio to collapse all regions by default?

When I open a code file in a new code window, I press Ctrl+M,O to collapse everything there. As far ... remember where was this option located. 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# - Linq filter List<string> where it contains a string value from another List<string>

I have 2 List objects (simplified): var fileList = Directory.EnumerateFiles(baseSourceFolderStr, fileNameStartStr + "*", ... do a similar thing. See Question&Answers more detail:os...

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

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541 views

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c# - using foreach to iterate simultaneously through multiple lists (syntax sugar)

Hi is there a way to do things like this: for (int i = 0; i < Math.Min(a.Count, b.Count); i++) { // ... <TSource>, ???Action<TSource,???>????) See Question&Answers more detail:os...

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

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311 views

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c# - accessor must be more restrictive than the property or indexer

I have the folowing class: using System; using System.Collections.Generic; using System.Linq; using System.Text; ... I really want to learn. See Question&Answers more detail:os...

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

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207 views

1 answer

c# - MSTest and app.config issue

I am stuck trying to automate unit tests runs with MSTest and deployment of app.config. I read multiple ... (map, ConfigurationUserLevel.None); See Question&Answers more detail:os...

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

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4.1k views

2 answers

c# - WebApi HttpClient not sending client certificate

I am trying to secure my RESTful WebApi service with ssl and client authentication using client certificates. ... certificate is located. See Question&Answers more detail:os...

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

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647 views

1 answer

c# - Visual Studio 2013 > New project > unspecified error (exception from hresult: 0x80004005 (e_fail))

Can anybody shed any light on the above error? I've tried with both Express and Ultimate editions of VS 2013. I'm ... build is c# ASP.net MVC. See Question&Answers more detail:os...

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

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431 views

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c# - How to remove leading and trailing spaces from a string

I have the following input: string txt = " i am a string " I want to remove space from start of starting and end ... " How can I do this in c#? See Question&Answers more detail:os...

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

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488 views

1 answer

c# - cannot write to the registry key

I am getting error cannot write to the registry key when i am trying to save my keys in the registry . ... decryptor = Decryptor.Create(); See Question&Answers more detail:os...

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

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295 views

1 answer

c# - HttpValueCollection and NameValueCollection

What is the difference between HttpValueCollection and NameValueCollection? If possible please explain with example. 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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243 views

1 answer

c# - How do I clear the server cache in asp.net?

How do I clear the server cache in asp.net? I have found out that there are two kinds of the cache. There is ... VB - Visual Basic (dot net). See Question&Answers more detail:os...

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

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185 views

1 answer

c# - this == null inside .NET instance method - why is that possible?

I've always thought that it's impossible for this to be null inside instance method body. Following simple ... -c-always-use-callvirt.aspx See Question&Answers more detail:os...

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

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409 views

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c# - Should I be using SqlDataReader inside a "using" statement?

Which of the following two examples are correct? (Or which one is better and should I use) In the MSDN ... the SqlConnection using code block. See Question&Answers more detail:os...

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

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380 views

1 answer

c# - asp.net mvc 3 razor view -> strongly typed List of tuple problem

I'm having an odd problem with asp.net MVC razor view. I want my model to be a List<Tuple<string, ... http://aspnet.codeplex.com/workitem/8652 See Question&Answers more detail:os...

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

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211 views

1 answer

c# - Looping through dictionary object

I am very new to .NET, used to working in PHP. I need to iterate via foreach through a dictionary of objects. ... and print them in the view? See Question&Answers more detail:os...

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

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376 views

1 answer

c# - Castle Windsor - IoC registration for open generic interfaces?

Does Castle Windsor permit registration of an open generic interface or do I need to register each possible ... ) .LifeStyle.PerWebRequest); 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

1 answer

c# - Exception from HRESULT: 0x80070057 (E_INVALIDARG)

I have a WPF application . While building it I am getting the following error: Could not load file or ... properties window by the 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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