Recent questions tagged C#

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c# - How can I know items is in the enum?

In this question, I use xor operator between enum with [Flags] attribute as following: [Flags] enum QueryFlag { ... Why and how to resolve? See Question&Answers more detail:os...

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

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830 views

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c# - Multiple forms on one MVC form, created with a loop, only the first submits data

I have the following code, only the first form submits anything, the following submit null values, each model has data. If ... ...do stuff... } 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# - cast of generic type fails

I am unable to cast a generic type to another generic type, besides the cast should be valid What I want to ... kind of cast is not possible? See Question&Answers more detail:os...

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

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989 views

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c# - Regex for alphanumeric password, with at least 1 number and character

Need help with a regex for alphanumeric password, with at least 1 number and character, and the length must be between 8-20 ... -z][A-Za-z0-9]*$ See Question&Answers more detail:os...

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

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819 views

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c# - Update an entity using entity framework while ignoring some properties

I am working with asp.net mvc 4. I have to update my persistence store using an edit method, but I want to ... how would I ignore some of them? See Question&Answers more detail:os...

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

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960 views

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c# - Generating a n-ary Cartesian product example

I found that Eric Lippert's post here suits a particular problem I have. The problem is I can't wrap my head around how ... , x2) => x2 + x1); 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# - Using Reflection with COM Interop

After an interop call, I get back a COM object. I know this object will be one of three possible COM classes ( ... null, null, null, true); } See Question&Answers more detail:os...

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

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940 views

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c# - how to add a character at the beginning of each line in Richtextbox

I am doing an app that adds a certain character for each selected line if you click the button. for example "/ ... } guys please help me 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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697 views

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c# - Dictionary<short, Dictionary<EnFunction, bool>> model binding not work

I could not bind the model to Controller. Please give me any advice. Model,controller and view classes are below. ... ="btn">Cancel</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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735 views

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c# - Preventing moving of a control out of its container

This question is related to another question of mine which can be found here can be found here. I wanted ... picture box will be appriciated! See Question&Answers more detail:os...

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

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901 views

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c# - How can I convert a boxed two-dimensional array to a two-dimensional string array in one step?

Is there a way to convert a boxed two-dimensional array to a two-dimensional string array in one step using C# ... far the answer has eluded me. See Question&Answers more detail:os...

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

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820 views

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c# - Winforms DataGridView resizing issue

I'm not 100% sure how I should word this question but I'll try my best. I have a PointCtrlForm that has a ... = "PointCtrlForm"; this.Text = "LG-DDC"; this.tableLayoutPanel1....

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

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841 views

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c# - Windows Mobile 6.5 Professional

I have a problem with windows mobile 6.5 professional. Developed an application that runs on windows mobile 6.5 ... Windows Phone 6.5.3.5 See Question&Answers more detail:os...

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

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926 views

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c# - Spell check in winforms

In my win forms C# app, I want to be able to add spell check functionality. But, I want to do it ... service to also send back suggestions. See Question&Answers more detail:os...

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

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920 views

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c# - Serialize an object's properties to separate JSON objects in an array

I want to serialize properties but with each property enclosed in a separate JSON object in an array. Example below: ... } Can it be fixed? See Question&Answers more detail:os...

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

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859 views

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c# - Keep UI thread responsive when running long task in windows forms

I am trying to read a large text file into a TextBox and keep the ui responsive when a file is dragged to the ... catch (Exception ex) { } } See Question&Answers more detail:os...

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

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736 views

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c# - WCF Service returning 400 error: The body of the message cannot be read because it is empty

I have a WCF service that is causing a bit of a headache. I have tracing enabled, I have an object with a ... can't imagine it causing an issue. See Question&Answers more detail:os...

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

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915 views

1 answer

c# - How to convert byte array to image and display in datagrid?

I have made a sql database using sql server. This database include images. When I display this database ... tutorials are appreciated. 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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855 views

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c# - Find the rectangle area of image to Crop

I've image with the size of (352 x 240) And I want to crop the white area (the selected area as show below) ... to crop this area !! 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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1.1k views

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c# - Override DrawItem of ComboBox

I changed the highlight color of various of the controls, and I am planning to make more changes. So I ... e.DrawFocusRectangle(); } 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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1.2k views

1 answer

c# - How to send nested json object to mvc controller using ajax

I am working on an ASP.NET MVC application. I have the following view model in c#: public class ContactModel { ... me what i am missing?? See Question&Answers more detail:os...

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

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913 views

1 answer

c# - How does the BigInteger store values internally?

The BigInteger class has a method that returns a byte array. Is that indicative of the fact that the ... looking for specific binary patterns. See Question&Answers more detail:os...

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

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894 views

1 answer

c# - How to draw a graph in chart control with mouse

My task is to draw a graph in chart control using mouse and retrieve the (X,Y) points from the Graph. I tried ... I use C# VS 2010 Win-forms. 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# - Uploaded Docx Files are getting corrupted

One of our internal websites allows for users to upload documents and stores the files into the SQL 2008 database. The ... ], "text/html"); } 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

1 answer

c# - Difference between await Task and await Task.WhenAll

What is the difference when using await on multiple await task vs waiting on all the tasks to ... createWorkflowtask, getTaskWorkflowTask); } See Question&Answers more detail:os...

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

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1.0k views

1 answer

c# - How to read nested/child DICOM tags from sequences using fo-dicom?

For my project, I'm trying to read a radiation therapy plan (RT Plan) out of a DICOM file with fo-dicom ... tags from sequences using fo-dicom? See Question&Answers more detail:os...

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

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897 views

1 answer

c# - BackgroundDownloader.GetCurrentDownloadsAsync returns completed downloads

In my windows store app I am using BackgroundDownloader class to handle multiple background downloads. After all ... in my application? 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

1 answer

c# - Play Background Sound and Sound Effect in Windows Phone 8

I have researched a lot on playing sounds for Windows Phone 8 devices and found multiple solutions but ... suggestions are 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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