Recent questions tagged C#

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c# - Rendering to a single Bitmap object from multiple threads

What im doing is rendering a number of bitmaps to a single bitmap. There could be hundreds of images and ... suggestions. Any ideas? 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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144 views

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c# - Reading image from Access - parameter not valid

I have simple database in Access .mdb file, but I don't know how to deal with: "parameter not valid" ... = new emoryStream(abytStripped); } 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

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c# - Do I need to dispose the FileStream object?

I am pretty depressed by my programming knowledge but do we really need to dispose FileStream Object ? Reason I ... on my development machine... 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# - WPF ListView virtualization. How to disable ListView virtualization?

I have some troubles with custom ListView (CheckBoxes inside lost their states when scrolling ListView). Can I ... ListView.View> </ListView> 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# - INotifyCollectionChanged: Added item does not appear at given index '0'

I'm making a observable class. The Add methods works fine. But then I'm trying to call the Remove() method I get ... .Remove, item, index)); } } See Question&Answers more detail:os...

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

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389 views

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c# - Can System.Text.Json.JsonSerializer serialize collections on a read-only property?

I'm having trouble getting the new System.Text.Json to deserialize collections stored on read-only properties. ... classes we have defined. 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# - Why the concept of "Covariance" and "Contravariance" are applicable while implementing the methods of an interface?

The use case is some what like this: public class SomeClass : ICloneable { // Some Code // Implementing ... implementation of Microsoft ???? 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# - Asynchronous threads and session

When a new async thread has been spawned using this signature, will the ASP.NET session object be available to the ... f.BeginInvoke(null, f); See Question&Answers more detail:os...

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

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231 views

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c# - How to view the headers sent by HttpWebRequest

I'm scraping a site with HttpWebRequest, but the site is returning an error. The page works fine when I ... the data sent by HttpWebRequest? See Question&Answers more detail:os...

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

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877 views

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c# - Getting empty response on ASP.NET Core middleware on exception

I am trying to create a middleware that can log the response body as well as manage exception globally and ... as manage exception globally? See Question&Answers more detail:os...

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

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170 views

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c# - ASP.NET MVC 5 model binding list is empty

I stuck on this issue for a while.. I've created a simple view model: public class AddTranslationViewModel { ... What's the mistake 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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261 views

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c# - What are Parking Windows in Winforms

This is a follow up question to this answer https://stackoverflow.com/a/20584601/2530848. I was under the ... Control's Finalization or cleanup? See Question&Answers more detail:os...

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

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528 views

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c# - replace true/false in datagridview columns

I have a datagridview which I fill it as below : var q= repository.GetStudents();// dataGridView1.DataSource = ... could not resolve my problem. See Question&Answers more detail:os...

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

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209 views

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c# - Could not find a part of the path on windows azure

I deployed mvc-3 application on windows azure. In my application i am uploading the file an save it in the ... anybody tell me the problem ? 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# - Counting words in a collection using LINQ

I have a StringCollection object with 5 words in them. 3 of them are duplicate words. I am trying to create a LINQ ... a LINQ query to do 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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280 views

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c# - "Turning" an IEnumerable<IEnumerable<T>> 90 degrees

What I'm looking for is a basic operation (Which I'm sure have a name I'm just unaware of atm). I ... EDIT It will always be a square matrix See Question&Answers more detail:os...

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

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145 views

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c# - "Membership.Provider must be an instance of ExtendedMembershipProvider"

I'm writing a MVC4 Website using Microsoft Visual Studio express 2012 for web. Whenever I run "Update- ... </entityFramework> </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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359 views

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c# - Read and use settings from appsettings.json without IOptions<T>?

.NET Core allows to lazily read settings from configuration file, de-serialize it to a POCO and register that ... options without IOptions<T>? See Question&Answers more detail:os...

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

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206 views

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c# - reference a windows shell interface using .net 4.0

I am using the following code to reference a shell dll Type t = Type.GetTypeFromProgID("Shell.Application"); ... guide it will really helpful. See Question&Answers more detail:os...

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

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462 views

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c# - Icon.FromHandle: should I Dispose it, or call DestroyIcon?

I use Win32 SHGetFileInfo to get a handle to the icon belonging to a certain file. There are a lot of ... instead of Disposing the object? See Question&Answers more detail:os...

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

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339 views

1 answer

c# - Serialize Generic type over WCF Service

I have a C# class defined as follows: public class GenericItem<T> { public List<T> Items { get; set; } public ... this. 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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612 views

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c# - standard dispose pattern? why do we need "disposing" parameter in the virtual method and isn't the finalizer get called after dispose always?

Why do we need parameter disposing in the below code snippet. Moreover we invoke dispose with false, in ... SuppressFinalize(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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1.1k views

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c# - How to create Microsoft.Office.Interop.Word.Document object from byte array, without saving it to disk?

How can I create a Microsoft.Office.Interop.Word.Document object from byte array, without saving it to disk ... objDoc.Characters.Count; } See Question&Answers more detail:os...

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

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182 views

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c# - How do I make the items in a ListView a different color?

I have a ListView full of ListViewItems. I want to emphasize some of them when a certain event fires, ... emphasize the items dynamically? See Question&Answers more detail:os...

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

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579 views

1 answer

c# - Proper way to dispose a BitmapSource

How are you supposed to dispose of a BitmapSource ? // this wont work because BitmapSource doesnt implement IDisposable using( ... .png"))) { } See Question&Answers more detail:os...

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

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215 views

1 answer

c# - Index in the Select projection

I would like my index to start from a number count greater than 0 while doing something like this: var dataSource ... Is it possible 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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487 views

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c# - Possible to specify directory path with a wildcard?

I have the following piece of code: foreach (string file in Directory.GetFiles(sourcePath)) { // whatever } ... only, not directory names. See Question&Answers more detail:os...

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

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419 views

1 answer

c# - MailMessage sent string as body without newline in outlook

HI, I am trying to send a simple notification using system.net.mail.mailmessage. I just pass the string ... with correct newline information? See Question&Answers more detail:os...

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

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