Recent questions tagged C#

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c# - Can I make an ASP.NET Core controller internal?

ASP.NET (and Core) controllers need to be public. Problem is I have a controller which depends (in ... make an internal controller discoverable? See Question&Answers more detail:os...

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

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283 views

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c# - HtmlTextWriter to String - Am I overlooking something?

Perhaps I'm going about this all wrong (and please tell me if I am), but I'm hitting my head against a ... some light on this for me, 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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314 views

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c# - check if file exist on 64 bits system using File.Exists

My OS is 64 bits and in the foler C:WindowsSysWOW64 there is a file 111.txt, but there is not the file ... 111.txt under system32 not SysWoW64? 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# - EF Core "Group By could not be translated and will be evaluated locally."

I am running a simple query against an Sql Server database using Entity Framework Core 2.2.6 however the GroupBy is not ... (year, [h].[Date]) See Question&Answers more detail:os...

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

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424 views

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c# - Winforms Label Text property not displaying tab character

This should be very simple. I have a Label control on my Form and I am trying to put a tab character between ... atab"; 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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302 views

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c# - Exchange web services: why is ItemId not constant?

I write a small application, which should automatically process the emails from a public folder. For each email, ... and the specific email? See Question&Answers more detail:os...

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

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222 views

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c# - Why classes tend to be defined as interface nowadays?

These 2-3 last years, many projects I see, like Cuyahoga open source C# CMS, tends to define persistent and non ... ? A design pattern? ... 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# - Strange "Collection was modified after the enumerator was instantiated" exception

Perhaps someone can point me in the correct direction, because I'm completely stumped on this. I have a function ... out there run into 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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534 views

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c# - SQLite net PCL - Simple select

I use SQLite from windows app and now I am developing in Xamarin a portable app so I am using the plugin ... this field? Thanks for any tip See Question&Answers more detail:os...

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

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414 views

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c# - Exception when adding log4net config

I am getting an error on the very first line of code in the App.cs file (which is creating a readonly ... /root> </log4net> </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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454 views

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c# picturebox memory releasing problem

I'm a newby in C#. I have to repeatedly refresh a GUI picture box in a worker thread. The image is acquired ... this memory leak? Thanks a lot! 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# - Where is the IsEmpty reference/member in this XAML code?

I cannot understand where the IsEmpty comes from in this snippet of code (Path=Text.IsEmpty) (about a watermark ... link about it is great). See Question&Answers more detail:os...

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

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229 views

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c# - Adding headers in ASP.NET MVC 3

I have a basic ASP.NET MVC 3 app. I have a basic action that looks like the following: [AcceptVerbs(HttpVerbs. ... do that? Thank you so 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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293 views

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c# - Getting error while redirecting 'Response is not available in this context'

I am using following code to redirect user to a page. Session["USERDATA"] = user; if (roleName.Equals("Zerker" ... context. What should I 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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282 views

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c# - context menu parent?

Hi I added a context menu on label (c#, winforms). my context menu having 3 child items and i want to ... context menu items. 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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404 views

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c# - FirefoxWebdriver No data is available for encoding 437

I want to create a FirefoxWebdriver but get the following error Message: Initialization method Sma.Ldx.Systemtest.Ui. ... get an encoding error. See Question&Answers more detail:os...

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

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253 views

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c# - How do you organise open-source Visual Studio projects with open-source dependencies?

I've started an open source MVC4 project that is using some other open source project as a dependency. I've ... your code 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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301 views

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c# - Reading connection string from external config file

I have created a console application and an app.config file and Connections.config file. The app.config file has a ... What am I missing 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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799 views

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c# - System.Net.Mail.SmtpException: The operation has timed out. error in asp.net send mail code using godaddy hosting

I am using following peace of code to send mail using godaddy hosting . but its throw System.Net.Mail.SmtpException ... , subject, 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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221 views

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c# - Get color in specific location on gradient

I have the following GradientStopCollection: GradientStopCollection grsc = new GradientStopCollection(3); grsc.Add(new ... could do that? 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

1 answer

c# - How to track if an async/awaitable task is running

I'm trying to transition from the Event-based Asynchronous Pattern where I tracked running methods using unique id's ... { updateMetaData(); } } See Question&Answers more detail:os...

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

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312 views

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c# - Why use only the lower five bits of the shift operand when shifting a 32-bit value? (e.g. (UInt32)1 << 33 == 2)

Consider the following code: UInt32 val = 1; UInt32 shift31 = val << 31; // shift31 == 0x80000000 UInt32 ... compiler is trimming the values? See Question&Answers more detail:os...

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

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537 views

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c# - Automapper - can it map over only existing properties in source and destination objects?

I have a simple update function: public void Update(Users user) { tblUserData userData = _context.tblUserDatas.Where(u ... to be skipped over. See Question&Answers more detail:os...

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

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465 views

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c# - Operation must use an updateable query when updating excel sheet

I am getting this error when trying to update excel sheet : Server Error in '/ReadExcelData_Csharp' Application. Operation ... Yes;IMEX=2""; } See Question&Answers more detail:os...

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

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336 views

1 answer

c# - Blazor TwoWay Binding on custom Component

I'm creating a blazor server side app and have problems to bind a value between two custom components. I've ... for each of those 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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335 views

1 answer

c# - where is blend for visual studio 2012

I see a lot of refs to something called 'blend for visual studio' which I understand a W8 version of blend. I ... download.. How do I get 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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262 views

1 answer

c# - Specify datacontext type on listbox ItemContainer in style

In a ListBox I have a ItemContainer's IsSelected property bound to my ViewModel's IsSelected property using <ListBox. ... }" /> </Style> See Question&Answers more detail:os...

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

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326 views

1 answer

c# - Disable Type Hinting in WCF JSON Services

I have what should be a relatively simple question that I can't seem to find an answer for. When WCF ... somebody has figured 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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