Recent questions tagged C#

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I'm guessing you get hundreds of these questions, but here goes: So I'm trying to get a Honeywell Dolphin ... some very knowledgable guys 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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695 views

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c# - Is deadlock possible when locking one global object in ASP.NET MVC application?

For locking I am using a single static object which is global to my application: public class MvcApplication : ... avoid deadlock in this case? See Question&Answers more detail:os...

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

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642 views

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c# - How to get correct file extension when you know content-type

I have a byte[] containing data for a file. Array can contain data for several different filetypes like xml, ... sure for the file extension? See Question&Answers more detail:os...

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

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733 views

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c# - How to create a HyperLink field out of SQL query

In reference to this question of mine, GridView Table 1 related to Table 2 I got a gridview which looks like this at the ... = // not sure .... See Question&Answers more detail:os...

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

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764 views

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c# - The LINQ expression could not be translated for base property

I have custom OrderBy implementation, it only works for types without inheritance, if I want order by field ... MyTypeResult,System.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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687 views

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c# - Using a string in AppResources

I'm using LocalizedResources to get localization for my WP 8.1 app. But if I used a code like this: protected ... a page which I navigated from. See Question&Answers more detail:os...

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

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694 views

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c# - Why is Process.StandardInput.WriteLine not supplying input to my process?

this is my first question here so I'll be as detailed as I can. I am currently working on a C# program ... code to perform tests on StringGen. See Question&Answers more detail:os...

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

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750 views

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c# - empty path name not legal

I have a "save" button so when users click, it will do a saving of xml file(xml serialization). ... .Serialize(savestream, formsaving); } See Question&Answers more detail:os...

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

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657 views

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c# - Casting int[] to object[]

I encountered with question: why it's impossible cast int[] to object[] , e.g. object[] o = new int[] { 0 ... I'll be glad to hear deep answer. See Question&Answers more detail:os...

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

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614 views

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c# - Why this does not cause a memory leak when event is not unsubscribed

I am trying to understand how events can cause a memory leak. I found a good explaination at this stackoverflow ... Class Name Total 0 objects See Question&Answers more detail:os...

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

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648 views

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c# - Catching Exceptions in async methods when not called with await

Goal: I am confused by the behavior I am seeing with exceptions in my .Net Core library. The goal of this ... am not using that return type.) See Question&Answers more detail:os...

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

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1.1k views

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c# - Copy binary data to clipboard

How can I copy binary data in the clipboard? For example if I pack the number 1 as a 4-byte little-endian integer ... I don't know what to do. See Question&Answers more detail:os...

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

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685 views

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c# - DateTime.Parse throwing format exception

I retrieve date and time strings from xml by parsing XElement. The date and time values are retrieved by file. ... ); Any help 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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728 views

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c# - The right way to use MOQ setup and returns

Im new to MOQ and I am a little confused with the setup method. The example below shows one method that i need ... .That(retDate == date2); } See Question&Answers more detail:os...

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

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597 views

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c# - What's the simplest most elegant way to utilize a custom attribute

So a little confession, I've never written an attribute class. I understand they serve the purpose of ... using them without reflection. See Question&Answers more detail:os...

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

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546 views

1 answer

c# - Is there a maximum number of assemblies for a .NET app?

Quite a few apps support plugins. Are there any downsides to having a large number of plug-ins? Is there a sweet ... 've seen loaded in an app? See Question&Answers more detail:os...

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

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628 views

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c# - Get text from dynamically created textbox in asp.net

I've been banging my head against this all morning, so hopefully I can get some help. Essentially I'm having issues ... you for all of the 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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803 views

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c# - An OLE DB Provider was not specified in the ConnectionString. 'Provider=SQLOLEDB;

i trying to run query using C#, i am getting the following problem An OLE DB Provider was not specified ... OleDbConnection"/> 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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750 views

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c# - Searching for a string in a pdf files

I am working on a school project that has several pdf files. There should be a search by name functionality that I ... :) Thank you very much. See Question&Answers more detail:os...

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

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806 views

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c# - Why some identical strings are not interned in .NET?

string s1 = "test"; string s5 = s1.Substring(0, 3)+"t"; string s6 = s1.Substring(0,4)+""; Console. ... didn't have the same reference as s1? See Question&Answers more detail:os...

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

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668 views

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c# - What is the difference between Convert and Parse?

I could write the following to convert an object to an integer. Convert.ToInt32(myObject); But I could also ... be using? Thanks in advance. See Question&Answers more detail:os...

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

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952 views

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c# - Dynamically add KeyBindings in WPF

Is it possible to dynamically define KeyBindings based on a bound data source? I have a screen with a grid ... "/> </UserControl.InputBindings> See Question&Answers more detail:os...

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

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796 views

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c# - Command.ExecuteScalar always return null while Stored Procedure in Management Studio runs fine

I have the following SQL stored procedure with one input parameter and one out parameter. CREATE PROCEDURE [dbo].[ ... } } } Kind 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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747 views

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c# - Permutations of capitalization

I want to build a list containing every possible permutation of capitalization of a word. so it would be List< ... arbitrary letter in the word? See Question&Answers more detail:os...

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

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740 views

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c# - Collect objects still in scope - GC.Collect

I have read this article: http://blogs.msdn.com/b/oldnewthing/archive/2010/08/10/10048149.aspx and honestly I ... loop in the same function? See Question&Answers more detail:os...

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

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778 views

1 answer

c# - Does .NET 4.5's async feature work with MySql and other databases too?

I understand that .NET 4.5 comes with a bunch of features to make asynchronous database operations easier to implement. ... ? (e.g. RavenDB)? See Question&Answers more detail:os...

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

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724 views

1 answer

c# - database login prompt with crystal reports

I'm trying to display some report with some subreports inside it, but every it shows the report it throws ... } } return crReportDocument; } See Question&Answers more detail:os...

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

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931 views

1 answer

c# - Convert from List<double[]> to double[,]

Is there an one-liner (no looping) that converts List<double[]> to double[,]? See Question&Answers more detail:os...

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

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