Recent questions tagged C#

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c# - Locking does not prevent InvalidOperationException: Object is currently in use elsewhere

I was under the impression that lock() would prevent multiple threads from accessing an object ... I prevent InvalidOperationExceptions? 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 combine (OR) two expression trees

I have two expression trees of type : Expression<Func<string, bool>> and I would like to obtain a single ... to both expressions) Any idea? 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# - Seemingly circular dependencies causing issues with Castle Windsor

I have a IUserService (and other services) that I am registering in bulk in my ServiceInstaller.cs: container. ... can I solve this 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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c# - Operator Overloading For Builtin Types

How can I override operators to be used on builtin types like String, arrays etc? For example: I wish to ... of the + operator for arrays. 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# - Property is inaccessible due to its protection level

I need to post to the multiline TextBox. The data is coming from a different method in a separate class. ... method, or property Form1.textBox1' 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# - Winforms Animated background

i want the background of my winform to be animated like a animated gif in the background or a video file being played ... movie... how to do 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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c# - Showing HTML in PowerPoint

My Goal: Want to show HTML in Slide which I dynamically inject into a Master Presentation. What I've achieved ... there a pain free solution? 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# - .net core 2.1 reusing _Layout throughout various projects

I am trying to reuse the same _Layout.cshtml file, throughout multiple .net core 2.1 Razor Page projects. ... updates I will post 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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c# - How can I deserialize instances of a type that has read-only back-references to some container type also being deserialized?

Let's say I have two types, a Document and a Child. The Child is nested fairly deeply within the ... with the parent properly initialized? 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# - Automapper IEnumerable within class is not being mapped to RepeatedField

I want to map between two classes: public class A { public IEnumerable<C> someList } and public class B { public ... empty. How do I fix 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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c# - Split large text string into variable length strings without breaking words and keeping linebreaks and spaces

I am trying to break a large string of text into several smaller strings of text and define each smaller text ... or MSSQL, is it 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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c# - How To Add Value To A Column And Update Database

I am trying to add the value of the column Annual_Fees in dataGridViewAFp1 to a new value AF2 from the textbox txtp1AF ... txtp1AF.Text = " "; } 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# - WPF TreeViewItem Context Menu Unhighlights Item

I have been having problems with this for some time now, and have come up with some less-than-desirable ... problems with ListViews as well. 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# - Applying JsonDictionary attribute to dictionary

If I try to add the JsonDictionary attribute to a .net Dictionary(Of Integer, MyClass), the compiler tells ... to use the JsonDictionary online. 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 remove gaps in stacked bar

I'm trying to make gantt chart in C#, I'm using StackedBar chart type. The goal of this chart is to show, ... : http://i.imgur.com/64X3SNy.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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c# - KeyNotFoundException in filled dictionary

I am trying to modify value in dictionary, but the compiler throws KeyNotFoundException. I'm sure, I declared ... when they are in dictionary? 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# - Regex Pattern number1 to number2

I'm searching for a pattern for the following behavior: number1-number2 number1: Can be everything >= 0 and <= ... extract the two int 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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c# - how to get the key from json object and convert into an array?

{ "Date": "2016-12-15", "Data": { "A": 4.4023, "AB": 1.6403, "ABC": 2.3457 } } how can i get ... ,Ab,ABC into an array? just the keys not value. 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# - Add event handler during object initialization

I need to pass a instance (which will be created in this very moment) of a certain type to a method. This ... I like my code small & readable. 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# - XSD.EXE + JSON.NET - How to deal with xxxSpecified generated members?

When using XSD.EXE to generate classes from an XML Schema, it generates xxxSpecified members of any primitives of ... Looking for another 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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c# - How to prevent the beep sound caused by alt key pressed in a WinForms TextBox?

I'm creating a routine that allows the user to replicate keyboard shortcuts into a textbox for 'custom keyboard shortcuts' ... Ctrl + Shift + Y. 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# - Entity Framework 4.1 dynamically retrieve summary for scalar properties from database table column description

I'm using Entity-Framework 4.1 database-first approach. I have a legacy database which every table column ... I would appreciate any directions 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# - Property injection in custom membership provider using Castle

So far in reading about possibilities of injection to custom membership providers, I've found two possible ways to do ... shouldn't be 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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c# - Set URL of custom HTML loaded in webbrowser

I have loaded some html text in WebBrowser control (its uri becomes "about:blank"). Now I want to set its Uri to ... link. How can I 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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c# - A good way to show password in PasswordBox

I wonder i some one have any good idea how to show the password in the PasswordBox. Have read that you can bind ... it another way to do 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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c# - MDI Form detecting with a child form is added or removed

Is there an event I can use to tell if a child form has been added or removed from the MDI parent? 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# - EF Core 3.0 SumAsync triggers aggregate function exception

I am in the process of upgrading to EF Core 3.0 and .NET Core 3.0, but some of my queries stopped working. Here ... in .NET Core 3.0/EF Core 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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c# - Sorting of XML file by XMLElement's InnerText

Please have a look at the XML file. I would like to sort the XML file by <Order> tag <MyRootNode> <Tab> <Name>ABC</ ... can I do it in C# 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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