Recent questions tagged C#

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c# - Equivalent of HttpResponseException/IHttpActionResponse for .net Core webapi 2 (not mvc)

When I am reading about webapi for responding to requests and handling errors everything is based around: ... must be simple... 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# - The DateTime represented by the string is not supported in calendar System.Globalization.GregorianCalendar

I simply want to save Date of Birth into SQL database, but every time getting new exception, database ... yyyy", CultureInfo.InvariantCulture); 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# - Unknown build error Cannot resolve dependency to System.Windows

I just downloaded PoshConsole's source code and was trying to build the solution. I initially had ... the ReflectionOnlyAssemblyResolve event. See Question&Answers more detail:os...

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

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365 views

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c# - Is there any point in specifying a Guid when using ComVisible(false)?

When you create a new C# project in Visual Studio, the generated AssemblyInfo.cs file includes an attribute specifying ... false)] and a GUID. See Question&Answers more detail:os...

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

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370 views

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c# - How to clear text content in RichTextBox

After getting the text in the RichTextBox I want to clear the text. How can I do that? TextRange txt = new ... ); MessageBox.Show(txt.Text); See Question&Answers more detail:os...

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

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215 views

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c# - Get Length of array JSON.Net

How can I get the length of a JSON Array I get using json.net in C#? After sending a SOAP call I get a JSON ... would be too easy I guess :(.. 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# - #if preprocessor directive for directives other than DEBUG

I know that I can use preprocessor directives to check for Debug/Release by doing this: #if DEBUG //debug mode ... that is not Release #End If See Question&Answers more detail:os...

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

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240 views

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c# - How to set an event function via a style?

I have several GUI control elements of which some are supposed to generate the same action (code-behind function call ... all sliders in my GUI? See Question&Answers more detail:os...

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

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417 views

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c# - PropertyChanged event always null

I have the following (abbreviated) xaml: <TextBlock Text="{Binding Path=statusMsg, UpdateSourceTrigger=PropertyChanged}"/> ... null. 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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166 views

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c# - The EntityContainer name must be unique. An EntityContainer with the name 'Entities' is already defined

For a little background: I have a DLL project with the following structure: Rivworks.Model (project) Negotiation ... Any suggestions welcome... See Question&Answers more detail:os...

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

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539 views

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c# - The variable 'variable_name' is either undeclared or was never assigned

I have a question related to the error on the title. Im working with c# and Visual Studio 2010. I have a form ... can help me with this 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# - Using more than one condition in linq's where method

I have a line of code using where: codebase.Methods.Where(x => x.Body.Scopes.Count > 5); How can I ... predicate && y => predicate? 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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168 views

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c# - GetType() on Array item?

I have an initialised array that may contain no items. Lets call it a, Calling GetType() on a will ... cause a null reference exception. See Question&Answers more detail:os...

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

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623 views

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c# - How to execute raw SQL query using Entity Framework without having to use a model?

I am trying to learn C# ASP.NET MVC 5. And I am trying to use Entity Framework for everything I do. However ... can I execute this raw query? See Question&Answers more detail:os...

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

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158 views

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c# - Is there an elegant way to repeat an action?

In C#, using .NET Framework 4, is there an elegant way to repeat the same action a determined number of ... it already possible to do 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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573 views

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c# - How can I see the Entity Framework's pending changes?

I'm creating an application with the ADO.NET Entity Framework. I can step through my code line-by-line while ... for a SaveChanges() call? See Question&Answers more detail:os...

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

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262 views

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c# - How do I resolve a path relative to an ASP.NET MVC 4 application root?

How do I resolve paths relative to an ASP.NET MVC 4 application's root directory? That is, I want to open ... .html → C:AppDataData.html. See Question&Answers more detail:os...

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

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218 views

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c# - Serializable Inheritance

If something inherits from a Serializable class, is the child class still Serializable? See Question&Answers more detail:os...

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

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403 views

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c# - Omitted setter vs private setter?

What is the difference between a property with a omitted setter and a property with a private setter? public string Foo ... string Foo { get; } See Question&Answers more detail:os...

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

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136 views

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c# - Method not found on runtime

I have an ASP.Net c# project trying to access methods in a class in another project. It's working for first ... the method in the other project. See Question&Answers more detail:os...

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

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737 views

1 answer

c# - Right way to close WPF GUI application: GetCurrentProcess().Kill(), Environment.Exit(0) or this.Shutdown()

My GUI desktop-based WPF 4.0 (C# .Net 4.0) program works with SQL Server database. Each time when I run my ... side of += or -= 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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490 views

1 answer

c# - Is "ReferenceEquals(myObject, null)" better practice than "myObject == null"?

I have a co-worker who's a fan of writing his null checks as follows: if (!ReferenceEquals(myObject, null ... benefit to ReferenceEquals vs == ? See Question&Answers more detail:os...

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

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302 views

1 answer

c# - How do I get the caller's IP address in a WebMethod?

How do I get the caller's IP address in a WebMethod? [WebMethod] public void Foo() { // HttpRequest... ? - ... ... } using C# and ASP.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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343 views

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c# - How to set HTTP status code from ASP.NET MVC 3?

We're using OpenWeb js libraries on the frontend, and they have a need for the .NET middle tier to send them ... is simple: /Main/TestError/400 See Question&Answers more detail:os...

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

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294 views

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c# - Associativity math: (a + b) + c != a + (b + c)

Recently I was going through an old blog post by Eric Lippert in which, while writing about associativity he ... that hold true and 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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446 views

1 answer

c# - Entity Framework auto generate GUID

I am new to EF so here goes.I have a class which contains the following public class EmailTemplate { public Guid ... auto create a unique GUID? See Question&Answers more detail:os...

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

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158 views

1 answer

c# - Random element of List<T> from LINQ SQL

I'm using C# 3.5 and am currently using Linq to get all users from a user table and put them in a list ... How to get a Random Object using 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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249 views

1 answer

c# - Set an empty DateTime variable

I would declare an empty String variable like this: string myString = string.Empty; Is there an equivalent for a ... provided it. Any idea 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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