Recent questions tagged C#

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c# - Converting DateTime.Now To A Different Time Zone

This code has been working for a long time now but has broken now when I try to pass DateTime.Now as ... EDIT: outageEndDate.Kind = Utc See Question&Answers more detail:os...

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

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514 views

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c# - Wrap XML in SOAP envelope in .net

I need help with wrapping an XML in a SOAP envelope for a third party SOAP server. The third party has ... for me in a standardized 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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279 views

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c# - Printing RichTextBox

I am making a simple WinForms App and I wanted to allow the user to print the Text from RichTextBox. I followed ... next page in a proper 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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246 views

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c# - Entity Framework 0..1 to 0 relation

class First { [Key] public int Id { get; set; } } class Second { [Key] public int Id { get; set; ... doesn't contain any instance of Second. See Question&Answers more detail:os...

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

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255 views

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c# - Convert LambdaExpression to String, Including Values

I have a method which converts a LambdaExpression to a string. I use these strings as keys for a cache. string p = " ... "."); } return body; } See Question&Answers more detail:os...

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

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359 views

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c# - Saving 8-bit indexed data in a PNG alters original bytes when using BitmapSource, PngBitmapEncoder/Decoder

I have a problem when saving and loading a PNG using BitmapSource and PngBitmapEncoder/Decoder. Basically, I'd like to ... is set. 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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279 views

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c# - AlreadyAllocated calling waveOutOpen error

private void receiveAudio(object sender) { IPEndPoint senderEP = new IPEndPoint(IPAddress.Any, 0); MemoryStream ... with "audioDataStream " See Question&Answers more detail:os...

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

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248 views

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c# - Export html table to excel in asp.net MVC2

Hi am looking for the best way on how export to excel does in ASP.NET MVC Now i got this one from ... first working sample. Thanks in Regards See Question&Answers more detail:os...

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

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412 views

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c# - How do I change a dropdown box in a webbrowser control?

So I have a listbox I want to change, that looks like this: How do I change the July value? I need this to be ... to find the ID of it, etc. 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 to persist MEF import and export information to disk

For my application as described in this question I want to use MEF to scan the available plugin assemblies and then ... to go about these steps? See Question&Answers more detail:os...

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

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268 views

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c# - Validation Framework in .NET that can do edits between fields

From my experience many validation frameworks in .NET allow you to validate a single field at a time for doing ... with this situation? :-) See Question&Answers more detail:os...

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

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384 views

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c# - WPF spell check languages

I'm trying to enable spell checking on a RichTextBox in a small WPF application. Most of the documents for ... also supported natively by WPF? See Question&Answers more detail:os...

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

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256 views

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c# - Why is it always necessary to implement IDisposable on an object that has an IDisposable member?

From what I can tell, it is an accepted rule that if you have a class A that has a member m that is ... I was trying to get at here. See Question&Answers more detail:os...

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

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384 views

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c# - Entity Framework TimeSpan - Time Error

I am using EF 5 and c#. In my Main Project i use CodeFirst to Create my Database. There i got ... assemblyBinding> </runtime> </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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287 views

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c# - Where clause on collection

I'm using the BAGA code from Julie Lerman's DbContext book. I want to recreate the following SQL query in LINQ and ... d) .ToList(); 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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243 views

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c# - ASP.NET MVC Model Binding into a List

In my ASP.NET MVC site, part of a feature allows the user to enter the hours when a certain venue is open ... information the user can fill in. See Question&Answers more detail:os...

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

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289 views

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c# - Expressing 2x2 Logic Grid in Code Efficiently

In an event handler I'm responding to the change of a value. I have access to the old value and the ... reward any material involvement at all. See Question&Answers more detail:os...

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

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378 views

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c# - Encrypt .NET binary serialization stream

I'm studying encryption in C# and I'm having trouble. I have some Rijndael encryption code and it's working ... .ReadBytes(218)); } 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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382 views

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c# - How can I make DataTable enumerable?

I cannot use AsEnumerable() on DataTable, I'm using C# 3 but I'm just targeting 2.0 framework (LINQ ... .aspx, but has compilation errors. See Question&Answers more detail:os...

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

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395 views

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c# - ComboBox will not update its display list unless you change selections first

Update: I checked the answer before I fully tested it still does not work. I updated the code below so you ... of a list makes no 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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348 views

1 answer

c# - Regex match take a very long time to execute

I wrote a regular expression that parses a file path into different group (DRIVE, DIR, FILE, EXTENSION). ^((? ... processor. What does it mean ? See Question&Answers more detail:os...

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

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454 views

1 answer

c# - making a simple search function, making the cursor jump to (or highlight) the word that is searched for

I have now used way too long time, trying to figure out a problem, which I didn't think would be ... having serious problems figuring this 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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513 views

1 answer

c# - What are expected results when optionsBuilder is defined in both DbContext.OnConfiguring and AspCore Startup.ConfigureServices?

My ASP.NET core has this class which gets called first public class Startup { public IConfiguration Configuration ... defined in two locations? See Question&Answers more detail:os...

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

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495 views

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c# - Can we use Response.Flush () instead of Response.End()

Response.End() generates ThreadAbortException. Using HttpContext.Current.ApplicationInstance.CompleteRequest in place of it ... Response.End() See Question&Answers more detail:os...

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

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405 views

1 answer

c# - How to detect is a camera is available using isTypePresent in a Windows 10 Universal Application

When developing a Universal Application for Windows 10 you are encouraged to detect device specific hardware using ... particular, the camera. 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

1 answer

c# - What is the easiest way to convert this XML document to my object?

I have an XMLDocument that i need to read in and convert into a set of objects. I have the following ... basically a List<Location> objects? See Question&Answers more detail:os...

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

0 votes

287 views

1 answer

c# - What is the best way to update form controls from a worker thread?

I've done some research and I can't really find a preferred way to do updating of form controls ... using the BackgroundWorker component? See Question&Answers more detail:os...

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

0 votes

763 views

1 answer

c# - Identify COM port using VID and PID for USB device attached to x64

As following i able to get usb com port names attached to 32bit win7OS machine, by given pid and vid,but when ... names in x64, any suggestion? See Question&Answers more detail:os...

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

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