Recent questions tagged C#

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c# - The entity type List`1 is not part of the model for the current context

I've been using Database First, EF 4.1 I am getting "The entity type List`1 is not part of the ... Any assistance would be greatly 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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221 views

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c# - Is there a race condition in this common pattern used to prevent NullReferenceException?

I asked this question and got this interesting (and a little disconcerting) answer. Daniel states in his answer ... into a single operation. See Question&Answers more detail:os...

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

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230 views

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c# - How to save this string into XML file?

I have this string variable: string xml = @"<Contacts> <Contact> <Name>Patrick Hines</Name> <Phone Type=""Home""> ... in my drive c? Using 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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370 views

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c# - Draw a Fill Rectangle with low opacity

I a have a PictureBox with a picture in a Windows Form application in C# language.I want draw a FillRectangle ... to see image of picturebox? See Question&Answers more detail:os...

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

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588 views

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c# - How to set WebClient Content-Type Header?

To conect to a third party service I need to make a Https Post. One of the requisites set is to sent ... Content-Type, from private properties. 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# - How to correctly represent a whitespace character

I wanted to know how to represent a whitespace character in C#. I found the empty string representation string. ... ().Split(Char.Whitespace) See Question&Answers more detail:os...

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

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239 views

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c# - Why won't my windows service write to my log file?

I have a windows service and use nlog for logging. Everything works fine when I run from the visual studio ide. The log ... /> </rules> </nlog> See Question&Answers more detail:os...

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

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379 views

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c# - ASP.net Postback - Scroll to Specific Position

I have an ASP.net WebForms page that has a lot of content on the top of the screen. It has a link ... postback using a button or link button? See Question&Answers more detail:os...

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

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693 views

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c# - Message Queue Error: cannot find a formatter capable of reading message

I'm writing messages to a Message Queue in C# as follows: queue.Send(new Message("message")); I'm trying to ... message." What am I doing wrong? See Question&Answers more detail:os...

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

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278 views

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c# - Enum to dictionary

I want to implement an extension method which converts an enum to a dictionary: public static Dictionary<int, ... an assembly reference?)" See Question&Answers more detail:os...

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

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325 views

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c# - how to deserialize an xml node with a value and an attribute using asp.net serialization

I have 4 small classes to deserialize xml from an incomming xml poll, to usable classes to build up the poll ... the AnswerItem's Id Attribute. See Question&Answers more detail:os...

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

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438 views

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c# - Disable all Resharper warnings with a comment

Is there a way to disable all Resharper warnings for a file or section of code with a single comment? I'm trying ... 't think it works that 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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679 views

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c# - Why does Debug.WriteLine incorrectly format strings?

I have the following Debug.WriteLine: Debug.WriteLine("Metadata Version: {0}", version); // update: version is a ... Version: {0}", version)); See Question&Answers more detail:os...

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

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144 views

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c# - Asp.net controls are not accessible in code behind

I have a project that was previously built by someone else. When I try to add a new control to the page ... asp:ImageButton ID="imgBtnDelete" runat="server" ImageUrl="images/delete...

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

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315 views

1 answer

c# - ASP.NET Core "CreatedAtRoute" Failure

Inside my ASP.NET Core app I have a controller action like this: [HttpPost] public async Task<IActionResult> ... Ok(subscriber); } Thoughts? See Question&Answers more detail:os...

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

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1.5k views

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c# - JsonConvert.DeserializeObject could not convert string to DateTime when using non-us date formats

I have the following serialized json object: "{"LineItems":[{"LineID":1,"QuoteID":"00000000-0000-0000-0000- ... to use non-us dates? See Question&Answers more detail:os...

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

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406 views

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c# - Parser Error Message: The file '/TestSite/Default.aspx.cs' does not exist

Short story. This site was created by a friend of mine, who did not know that much C# or asp. And was ... .cs" Inherits="GuildStats.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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508 views

1 answer

c# - Random assembly references fail ("Are you missing a using directive or an assembly reference?")

My application has a mixture of 3.5 and 4.0-targeted assemblies. I'm working on a new Windows service ... . What could be causing 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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382 views

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c# - System.Data.MetadataException: Unable to load the specified metadata resource

My connection strings are as follows: <add name="RollCallDBEntities" connectionString="metadata=res://System. ... specified metadata resource See Question&Answers more detail:os...

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

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397 views

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c# - Multi-line string in a PropertyGrid

Is there a built-in editor for a multi-line string in a PropertyGrid. See Question&Answers more detail:os...

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

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216 views

1 answer

c# - services.AddSwaggerGen() giving error

All I'm trying to do is add swagger to an ASP.Net Core application. I'm watching a tutorial and all I see ... s red and giving the above error. See Question&Answers more detail:os...

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

0 votes

705 views

1 answer

c# - Set the class attribute to Html.EditorFor in ASP.NET MVC Razor View

As you know we can set attributes to actionLink or textBox in razor views but how can we set attributes to @Html. ... {@class = "myclass"} ? See Question&Answers more detail:os...

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

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457 views

1 answer

c# - Avoid giving namespace name in Type.GetType()

Type.GetType("TheClass"); Returns null if the namespace is not present like: Type.GetType("SomeNamespace.TheClass ... giving the namespace 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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297 views

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c# - What is the .vs folder used for in Visual Studio solutions?

What is the .vs folder used for exactly? It gets created at the base folder of my solution. I can ... chasing up official documentation on 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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275 views

1 answer

c# - Any sense to set obj = null(Nothing) in Dispose()?

Is there any sense to set custom object to null(Nothing in VB.NET) in the Dispose() method? Could this prevent memory ... // any sense? } } } See Question&Answers more detail:os...

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

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492 views

1 answer

c# - Cannot evaluate expression because a thread is stopped at a point where garbage collection is impossible

Here is the error Cannot evaluate expression because a thread is stopped at a point where garbage collection is ... showed. Can anyone 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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381 views

1 answer

c# - async/await exception handling pattern

I have the following reoccurring try/catch pattern in my code. Using a try/catch block to handle any exceptions ... so ShowContacts doesn't run. See Question&Answers more detail:os...

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

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516 views

1 answer

c# - How to set null to a GUID property

I have an object of type Employee which has a Guid property. I know if I want to set to null I must to ... empty guid to null. Any help please! See Question&Answers more detail:os...

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

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