Recent questions tagged C#

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c# - The imported project "C:Microsoft.CSharp.targets" was not found

I got this error today when trying to open a Visual Studio 2008 project in Visual Studio 2005: The imported ... CSharp.targets" was not found. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why "decimal" is not a valid attribute parameter type?

It is really unbelievable but real. This code will not work: [AttributeUsage(AttributeTargets.Property|AttributeTargets. ... decimal is not. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How can you bind to a DynamicResource so you can use a Converter or StringFormat, etc.? (Revision 4)

Note: This is a revision of an earlier design that had the limitation of not being usable in a style, negating its ... do this. Hope it helps! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Resize WPF Window and contents depening on screen resolution

I have a WPF app with multiple controls on each window, some overlayed etc, what i need is a way of ... the screen resolution. Any ideas ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Get IPrincipal from OAuth Bearer Token in OWIN

I have successfully added OAuth to my WebAPI 2 project using OWIN. I receive tokens and can use them in the ... you in advance for the help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How does creating a instance of class inside of the class itself works?

What makes it possible to create a instance of class inside of the class itself? public class My_Class { My_Class ... to the degree I expected. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to handle add to list event?

I have a list like this: List<Controls> list = new List<Controls> How to handle adding new position to this ... can I make this event available? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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504 views

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c# - Is DbContext the same as DataContext?

I'm following a tutorial by Scott Gu that refers to a class named DbContext. I can't find it on any ... .DataContext. Is my assumption correct? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Wait some seconds without blocking UI execution

I would like to wait some seconds between two instruction, but WITHOUT blocking the execution. For example, Thread. ... in the 20 seconds. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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665 views

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c# - Mocking EF DbContext with Moq

I'm trying to create a unit test for my service with a mocked DbContext. I created an interface IDbContext ... >)' has some invalid arguments See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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494 views

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c# - Visual Studio 2015 break on unhandled exceptions not working

Visual studio used to have a specific checkbox to "Break on Un-handled exception". In 2015 this has been ... to the community edition yesterday. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

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c# - How to ensure a timestamp is always unique?

I'm using timestamps to temporally order concurrent changes in my program, and require that each timestamp of a ... skew would be unnoticeable. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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701 views

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c# - Pass multiple complex objects to a post/put Web API method

Can some please help me to know how to pass multiple objects from a C# console app to Web API controller as ... [FromBody]Config config) { } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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619 views

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c# - Get all properties which marked certain attribute

I have class and properties in there. Some properties can be marked attribute (it's my LocalizedDisplayName inherits ... resource file. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

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c# - Entity Framework Code First Date field creation

I am using Entity Framework Code First method to create my database table. The following code creates a ... DATE, during table creation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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703 views

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c# - Linq Syntax - Selecting multiple columns

This is my Linq Syntax which I am using to my entity model IQueryable<string> objEmployee = null; objEmployee = from ... Linq to SQL - right ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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566 views

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c# - How to do ToString for a possibly null object?

Is there a simple way of doing the following: String s = myObj == null ? "" : myObj.ToString(); I know I ... () had a proper overload for this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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573 views

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c# - Why are ToLookup and GroupBy different?

.ToLookup<TSource, TKey> returns an ILookup<TKey, TSource>. ILookup<TKey, TSource> also implements interface ... Why should it exist? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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938 views

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c# - How do I write logs from within Startup.cs?

In order to debug a .NET Core app which is failing on startup, I would like to write logs from within the ... within the startup.cs file itself. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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512 views

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c# - Syncing SQL Server 2008 Databases over HTTP using WCF & Sync Framework

Has anyone here worked with Sync Framework and syncing through WCF endpoints? Please share code samples or sample ... updates from the Server. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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741 views

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c# - How to intersect two polygons?

This seems non-trivial (it gets asked quite a lot on various forums), but I absolutely need this as a ... library that makes this really easy! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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680 views

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c# - Is it there any LRU implementation of IDictionary?

I would like to implement a simple in-memory LRU cache system and I was thinking about a solution based on ... anyone had experiences like this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

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c# - Creating a property setter delegate

I have created methods for converting a property lambda to a delegate: public static Delegate MakeGetter<T>(Expression ... ? Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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530 views

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c# - Allow access permission to write in Program Files of Windows 7

My application throws 'Access denied' errors when writing temporary files in the installation directory where the ... full admin rights) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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379 views

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c# - Entity-framework code is slow when using Include() many times

I have been debugging some slow code and it seems that the culprit is the EF code posted below. It takes ... ); scope.Complete(); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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c# - Async/Await - is it *concurrent*?

I've been considering the new async stuff in C# 5, and one particular question came up. I understand that the ... I'm missing something :) ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

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c# - How to correctly unregister an event handler

In a code review, I stumbled over this (simplified) code fragment to unregister an event handler: Fire -= ... check against null is required. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

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c# - DbContext discard changes without disposing

I have a desktop client application that uses modal windows to set properties for hierarchical objects. Since this ... Framework Version 4.4. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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