Recent questions tagged C#

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c# - The object cannot be deleted because it was not found in the ObjectStateManager in entity framework 5

I'm trying to delete an object using EntityFramework 5 but i get this error. The object cannot be deleted ... .SaveChanges(); Any inputs? See Question&Answers more detail:os...

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

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807 views

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c# - Task status changes to RanToCompletion if the Task await's something

The question describes the same problem found here - MSDN Developer Forum. The question does not have ... as RanToCompletion prematurely? See Question&Answers more detail:os...

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

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480 views

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c# - How to sort an array of FileInfo[]

I have the following code DirectoryInfo taskDirectory = new DirectoryInfo(this.taskDirectoryPath); FileInfo[] taskFiles = ... using .net v2. See Question&Answers more detail:os...

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

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163 views

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c# - Why doesn't the compiler at least warn on this == null

Why does the C# compiler not even complain with a warning on this code? : if (this == null) { // .. ... the condition will never be satisfied.. See Question&Answers more detail:os...

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

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198 views

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c# - Generate html documentation automatically during a build with Sandcastle

What steps do I need to take to get HTML documentation automatically building via the build step in Visual Studio ... to generate the docs. See Question&Answers more detail:os...

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

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1.0k views

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c# - Function evaluation disabled because a previous function evaluation timed out

I have an C# application in which I am getting this error : "Function evaluation disabled because a previous ... am using Visual studio 2005. See Question&Answers more detail:os...

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

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475 views

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c# - How to bind Generic-type interfaces in Ninject

I'm fairly new to Ninject, and found myself stumbling when I came to implement a generic repository ... <IEntityType,EntityType>>() See Question&Answers more detail:os...

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

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519 views

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c# - Display a Default value for a Databound WPF ComboBox

I have a databound WPF comboxbox where I am using the SelectedValuePath property to select a selected value based on ... shortcoming in the UI. 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

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c# - .NET MySQL Connector Conflicting DbProviderFactories

I'm using the .NET MySQL Connector with Entity Framework 4, and everything worked great but I wanted to package ... I build the application for. See Question&Answers more detail:os...

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

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310 views

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c# - How to add MVC 5 authentication to Unity IoC?

I'm currently working on implementing the new ASP.NET MVC 5 out-of-the box authentication into my application ... would be widely 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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488 views

1 answer

c# - Generally accepted way to avoid KnownType attribute for every derived class

Is there a generally accepted way to avoid having to use KnownType attributes on WCF services? I've been doing some ... ()).ToArray(); } } 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# - Injecting Env Conn String into .NET Core 2.0 w/EF Core DbContext in different class lib than Startup prj & implementing IDesignTimeDbContextFactory

I honestly cannot believe how hard this is...first off the requirements that I am going for: Implementing ... appsettings.json more than once. See Question&Answers more detail:os...

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

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163 views

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c# - Difference between Query Expression and Method Expression in LINQ?

I don't know whether the term of above title is appropriate. Just like a and b: var list = Enumerable.Range ... of them? And any difference? See Question&Answers more detail:os...

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

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843 views

1 answer

c# - Call custom constructor with Dapper?

I'm trying to use Dapper to interface with the ASP.NET SQL Membership Provider tables. I wrapped the ... null) .ToList(); } 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# - How to list the SQL Server Instances installed on a local machine? ( Only local )

I would like to know if there's a way to list the SQL Server instances installed on the local computer. ... that are over the local network. See Question&Answers more detail:os...

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

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335 views

1 answer

c# - CloudConfigurationManager.GetSetting returning null

Following instructions here I have: var connectionString = CloudConfigurationManager.GetSetting("StorageConnectionString"); ... /configuration> 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# - A faster way of doing multiple string replacements

I need to do the following: static string[] pats = { "?", "?", "?", "?", "?", "?", "?", "? ... any more elegant way to do this in fewer passes? See Question&Answers more detail:os...

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

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341 views

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c# - How to get cell value of DataGridView by column name?

I have a WinForms application with a DataGridView, which DataSource is a DataTable (filled from SQL Server) which ... values by column name? See Question&Answers more detail:os...

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

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974 views

1 answer

c# - Linq ToList/ToArray/ToDictionary performance

Well I encounter many situations where having an IEnumerable is not enough. However I'm unsure about the performance of the ... is O(n), right ? See Question&Answers more detail:os...

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

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504 views

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c# - What is the difference between these two HttpContext.Current.Session and Session - asp.net 4.0

What is the difference between these 2 piece of codes. HttpContext.Current.Session["myvariable"] Session["myvariable"] asp.net 4.0 and C# 4.0 See Question&Answers more detail:os...

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

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277 views

1 answer

c# - Private Set or Private member?

I was wondering what's considered the C# best practice, private/protected members with public getters, or public ... the use of readonly. See Question&Answers more detail:os...

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

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212 views

1 answer

c# - What is fastest way to convert bool to byte?

What is fastest way to convert bool to byte? I want this mapping: False=0, True=1 Note: I don't want to use any if ... (A - 1) * (k + 0x30); See Question&Answers more detail:os...

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

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542 views

1 answer

c# - The application has failed to start because its side-by-side configuration is incorrect

Unhandled Exception: System.IO.FileLoadException: Could not load file or assembl y 'TheLibrary, Version=1.2.3905.36284 ... =... 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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392 views

1 answer

c# - How to disable precompiled views in net core 2.1+ / net 5 for debugging?

Yesterday I updated to net core 2.1. Now if I am debugging, the views getting precompiled, which ofcourse takes a ... All" />--> </ItemGroup> 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

1 answer

c# - How do nullable types handle null values with comparison operators?

Does anyone have concrete information on how C# handles comparisons with Nullable<T> types when one side of the comparison ... return x < y; } See Question&Answers more detail:os...

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

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550 views

1 answer

c# - Xamarin.Forms untappable ListView (remove selection ripple effect)

I have a ListView with a custom ViewCell that displays articles. However when you select a item, it shows the ... I remove the ripple 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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172 views

1 answer

c# - Extension interface patterns

The new extensions in .Net 3.5 allow functionality to be split out from interfaces. For instance in . ... IEnumerable and IQueryable for Linq? See Question&Answers more detail:os...

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

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536 views

1 answer

c# - How to get X509Certificate from certificate store and generate xml signature data?

How can I get X509Certificate from certificate store and then generate XML SignatureData in .net 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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