Recent questions tagged C#

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c# 4.0 - EF Code First - Include(x => x.Properties.Entity) a 1 : Many association

Given a EF-Code First CTP5 entity layout like: public class Person { ... } which has a collection of: ... without a string? Thanks Stack! See Question&Answers more detail:os...

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

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505 views

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c# - OmniSharp.MSBuild.ProjectManager Attempted to update project that is not loaded:

I started to develop Asp.net Core web API with the VS code. But when I typing the code Intellisense/ ... /Suggestions not showing the issue. 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 Unit Test Startup.cs in .NET Core

How do people go about Unit Testing their Startup.cs classes in a .NET Core 2 application? All of the ... to have made it untestable? See Question&Answers more detail:os...

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

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196 views

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c# - Why use TagBuilder instead of StringBuilder?

what's the difference in using tag builder and string builder to create a table in a htmlhelper class, or ... they generating the same 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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206 views

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c# - Factory vs instance constructors

I can't think of any reasons why one is better than the other. Compare these two implementations: public ... the reasoning behind this style? See Question&Answers more detail:os...

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

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204 views

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c# - Code editor appears blank

I was using ReSharper with visual studio 2015 and my pc got really slow because of ReSharper and i had to ... nothing came across yet. 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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355 views

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c# - .NET dictionary with two keys and one value

Is there a dictionary available in .NET that could hold 2 keys and one value. Like Dictionary(Of TKey, Of ... that can hold multiple keys? See Question&Answers more detail:os...

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

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442 views

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c# - Calculate previous week's start and end date

What is the best way to calculate the previous week's start and end date in C#? I.e. today 18 March would ... there is a more elegant 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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372 views

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c# - Creating hidden folders

Is there any way that I can programmatically create (and I guess access) hidden folders on a storage device from within 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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c# - Redirect to login when unauthorized in ASP.NET Core

In the previous ASP.NET MVC, there was an option to redirect to the login action, if the user was not ... Where/how is this option 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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280 views

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c# - OData Error: The query specified in the URI is not valid. The property cannot be used in the query option

I'm trying to get an OData endpoint up and working and I'm having this error that even Google doesn't have much to ... from Nuget on .NET 4.5.2. See Question&Answers more detail:os...

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

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253 views

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c# - .Net Core 3.0 JsonSerializer populate existing object

I'm preparing a migration from ASP.NET Core 2.2 to 3.0. As I don't use more advanced JSON features (but ... value persist (as with "Title") 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# - Preventing same Event handler assignment multiple times

If I am assigning an event handler at runtime and it is in a spot that can be called multiple times, what ... handling ;) of this scenario. See Question&Answers more detail:os...

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

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231 views

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c# - Difference between Task.Run and QueueBackgroundWorkItem in Asp.Net

What exactly is the difference using Task.Run(() => { LongRunningMethod(); }); or ... special about QueueBackgroundWorkItem then? See Question&Answers more detail:os...

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

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616 views

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c# - Sort List<DateTime> Descending

In c# (3.0 or 3.5, so we can use lambdas), is there an elegant way of sorting a list of dates in ... is a property typed as a 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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266 views

1 answer

c# - AutoFixture - configure fixture to limit string generation length

When using AutoFixture's Build method for some type, how can I limit the length of the strings generated ... object's string properties/fields? See Question&Answers more detail:os...

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

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339 views

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c# - Cannot find sn.exe to sign Assembly

I looked into C:Program FilesMicrosoft.NET and I can't see any SN.exe file. I have .NET 3.5 runtime installed; isn't that enough ? See Question&Answers more detail:os...

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

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391 views

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c# - How to configure Conditional Mapping in AutoMapper?

Suppose I have the following entities (classes) public class Target { public string Value; } public class Source ... getting in 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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241 views

1 answer

c# - Why is [Owin] throwing a null exception on new project?

I have a rather strange issue i'm not sure how to fix or if i can even fix it. I've done some ... Does anyone know why this is happening? See Question&Answers more detail:os...

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

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297 views

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c# - Entity Framework Core: `SqlNullValueException: Data is Null.` How to troubleshoot?

I am using Entity Framework Core in an ASP.NET Core application and Controller action and I haven't ... ), Column("CompanyVatNumber"), Required] public string CompanyVatNumber...

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

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844 views

1 answer

c# - You must add a reference to assembly mscorlib, version=4.0.0

I'm having some trouble migrating a web project from RC1 to RC2. When I switched, I'm getting a bunch of ... dotnet restore, did not 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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279 views

1 answer

c# - CodeFirst EF4.1 MVC Against legacy database - Multiplicity conflicts

No matter which way I mix it, it gives me errors. I have a feeling I'm missing something obvious ... HasColumnName("VENUE_NAME"); #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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231 views

1 answer

c# - How to read existing text files without defining path

Most of the examples shows how to read text file from exact location (f.e. "C:UsersOwnerDocumentsest1.txt"). But, ... same folder as .exe file)? See Question&Answers more detail:os...

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

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222 views

1 answer

c# - Could string comparisons really differ based on culture when the string is guaranteed not to change?

I'm reading encrypted credentials/connection strings from a config file. Resharper tells me, "String.IndexOf(string) is ... (to use 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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500 views

1 answer

c# - Remotely connect to .net core self hosted web api

I have a simple .net core web api with one action: [Route("[action]")] public class APIController : Controller ... and at work with no success. See Question&Answers more detail:os...

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

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306 views

1 answer

c# - Setting HTTP cache control headers in Web API

What's the best way to set cache control headers for public caching servers in WebAPI? I'm not interested in ... a simple way to do this? See Question&Answers more detail:os...

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

0 votes

239 views

1 answer

c# - Insert a new row into DataTable

I have a datatable filled with staff data like.. Staff 1 - Day 1 - Total Staff 1 - Day 2 - Total Staff 1 ... a row into a datatable? Tkz.. See Question&Answers more detail:os...

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

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194 views

1 answer

c# - Web API optional parameters

I have a controller with the following signature: [Route("products/filter/{apc=apc}/{xpc=xpc}/{sku=sku}" ... the Route without this side effect? See Question&Answers more detail:os...

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

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