Recent questions tagged C#

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I'm attempting to read an email attachment and I'm getting a "Memory Stream is not expandable" error. I ... .. more unrelated code ... 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# - Displaying DateTime picker instead of Date picker in ASP .NET MVC 5.1/HTML 5 specific

I write application in ASP .NET MVC 5.1 I have a field: [DisplayName("Date of Birth")] [DataType(DataType. ... 5.1 HTML 5 specific solution. 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# - In .NET can a class have virtual constructor?

Can a class have virtual constructor?? If yes, why it is required? 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# - Converting a Predicate<T> to a Func<T, bool>

I have a class with a member Predicate which I would like to use in a Linq expression: using System.Linq; ... that this function will swallow? 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# - ClickOnce application skips asking for an update (or fail launch if skip is selected)

I updated my ClickOnce application and then when the user runs they are asked if they want to install the ... old version of the application. See Question&Answers more detail:os...

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

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159 views

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c# - Enable asp.net core request validation

Am I missing something or asp.net core allows to post script tag in user text fields? In Previous versions of asp.net ... " /> </div> </form> 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# - ASP.NET - Redirect to Error Page if Roles Authorization Fails

I am using MVC 3 with Forms Authentication. On my controller or methods, I am doing the following: [Authorize (Roles ... , I will go that route. 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 different is await/async from threading?

I'm trying to familiarize myself with c#'s new await/async keywords, and I've found several aspects which I ... outside of async functions. 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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236 views

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c# - ASP .NET CORE could not find file or assembly with custom assembly

I've ran into a weird problem. I basically have my own web-stack for .NET-core which I've built into a ... I do to make it runnable everywhere? See Question&Answers more detail:os...

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

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742 views

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c# - how to enable zooming in Microsoft chart control by using Mouse wheel

I am using Microsoft Chart control in my project and I want to enable zooming feature in Chart Control by using Mouse ... it can zoom in / out See Question&Answers more detail:os...

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

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146 views

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c# - How can I make a read only version of a class?

I have a class with various public properties which I allow users to edit through a property grid. For ... a read-only wrapper class? See Question&Answers more detail:os...

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

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283 views

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c# - Pass Html String from Controller to View ASP.Net MVC

Which is the best way to pass the Html String block from Controller to View in MVC. I want it display that ... displayed as an html. Thank you. 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# - convert int to nullable int?

I need to know how to convert an int to a nullable int. However, I keep getting an error "The binary operator ... .ChangeType(obj, t); } }' See Question&Answers more detail:os...

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

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154 views

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c# - Better way to detect XML?

Currently, I have the following c# code to extract a value out of text. If its XML, I want the value ... less expensive method of doing this. See Question&Answers more detail:os...

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

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356 views

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c# - what's the proper way to use a ThreadPool?

If my understanding of the way the ThreadPool works is correct, one of its purposes is to limit the number of worker ... ); } Console.Read(); } See Question&Answers more detail:os...

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

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1.6k views

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c# - Getting "Program does not contain a static 'Main' method suitable for an entry point" when building using docker, why?

Im running into an issue using docker and couldn't find a proper solution. I'm trying to build a docker image ... .dll"] Thanks for your 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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758 views

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c# - Force AutoFixture to use the greediest constructor

I have a data type with multiple constructors and I need AutoFixture to choose the greediest (one with the most parameters ... , and if so, how? See Question&Answers more detail:os...

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

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705 views

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c# - Create a delegate from a property getter or setter method

To create a delegate from a method you can use the compile type-safe syntax: private int Method() { .. ... to use an intermediate lambda 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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167 views

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c# - SQL "not in" syntax for Entity Framework 4.1

I have a simple issue with Entity Framework syntax for the "not in" SQL equivalent. Essentially, I want to convert ... were a close enough fit. See Question&Answers more detail:os...

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

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233 views

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c# - Which one is faster? Regex or EndsWith?

What would be faster? public String Roll() { Random rnd = new Random(); int roll = rnd.Next(1, 100000); ... faster before I change all of 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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436 views

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c# - Are there any good workarounds for FxCop warning CA1006?

I am having trouble with FxCop warning CA1006, Microsoft.Design "DoNotNestGenericTypesInMemberSignatures". Specifically, I ... better solution? See Question&Answers more detail:os...

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

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390 views

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c# - Difference between the classes System.StringComparer and System.StringComparison?

What is the difference between these two classes ? I have used System.StringComparer.OrdinalIgnoreCase() and System. ... they both same ? 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

1 answer

c# - What is the proper way to chain Tasks when returning a Task?

I am so so with using Tasks in C# but I get confused when I try to return a Task from a method and that method ... token); }, token).Unwrap(); } See Question&Answers more detail:os...

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

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298 views

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c# - Bulk deleting rows with RemoveRange()

I am trying to delete multiple rows from a table. In regular SQL Server, this would be simple as this: ... Column2 == 'AnotherRandomValue') ); See Question&Answers more detail:os...

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

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666 views

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c# - Web Client Exception: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel

I have a simple app that uses the C# Web Client class to download a websites HTML. This is a stripped down ... issue, and continue to the site? See Question&Answers more detail:os...

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

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183 views

1 answer

c# - Variable does not exist in the current context while debugging

I inserted two temp variables and want to see their values, but I can't. I could solve it by placing it ... not exist in the current context 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# - Should I be concerned about .NET dictionary speed?

I will be creating a project that will use dictionary lookups and inserts quite a bit. Is this something to be ... for new ways to handle this. See Question&Answers more detail:os...

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

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509 views

1 answer

c# - Request.IsAuthenticated is always false

Can you tell me why FormsAuthentication.SetAuthCookie(user.Name, false); is not causing Request.IsAuthenticated to be ... Windows or other mode? See Question&Answers more detail:os...

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

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