Recent questions tagged C#

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c# - DataGridView: Change Edit Control size while editing

in the DataGridView I want the cell size to expand according to the string length when I edit the cell. Excel ... get this working? Thanks, Timo See Question&Answers more detail:os...

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

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418 views

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c# - Difference between OfType<>() and checking type in Where() extension

Other than readability, what is the difference between the following linq queries and when and why would I use ... trying to simplify 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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497 views

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c# - Can't modify XNA Vector components

I have a class called Sprite, and ballSprite is an instance of that class. Sprite has a Vector2 property called ... why this isn't working. See Question&Answers more detail:os...

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

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732 views

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c# - Overriding List<T>'s Add()

Can't i overload List's Add method ? class ListDemo<T>:List<T> { public override T Add<T>(T value) { ... ': no suitable method found to override 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 Standard - Merge a certificate and a private key into a .pfx file programmatically

Is there any way to combine a certificate and a key (both received separately as Base64 strings from a service) ... like that in a constructor. See Question&Answers more detail:os...

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

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762 views

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c# - Static Variables in WCF

I have some WCF services. These services run in ASP.NET. I want these services to be able to access a ... anyone provide me with any ideas? 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# - Copy empty string using Clipboard.SetText(string)

Clipboard.SetText("") throws me an error - "Value cannot be null". So how do I copy an empty string ... paste an empty string Any 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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c# - How to Check If File is Encrypted using AES (Rijndael)

I am using 'RijndaelManaged' and 'CryptoStream' classes in C# to encrypt files. Before encrypting the files, i ... is already Encrypted or not. 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# - Two way databinding in winforms, Inotifypropertychanged implemented in base class

I use Winforms Databinding and I have derived classes, where the base class implements IPropertychanged : public ... manually edit the textbox. 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# - Linq to Entity comparing strings ignores white spaces

When using LINQ to entity doing string comparisons will ignore white spaces. In my table, I have an nchar(10) ... won't end up being used. See Question&Answers more detail:os...

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

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522 views

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c# - When items change while being enumerated does it affects the enumeration?

Imagine that during a foreach(var item in enumerable) The enumerable items change. It will affect the current foreach ... It will loop forever? See Question&Answers more detail:os...

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

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665 views

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c# - Taking ownership of a file or folder

Before I pull out the rest of my hair I'd like to get some input on this. I'm trying to take ownership of a ... 7 btw. 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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425 views

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c# - How to know if my DirectoryEntry is really connected to my LDAP directory?

I'm connecting to a LDAP directory in C#, so I've used the DirectoryEntry class. When you do the "new ... know if I'm really connected ? See Question&Answers more detail:os...

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

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542 views

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c# - Cannot be translated into a LINQ to Entities store expression

I am relatively new to LINQ-to-Entities, but use LINQ-to-SQL a lot. I am using Visual Studio 2013 with Entity Framework ... ) { throw; } } } } See Question&Answers more detail:os...

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

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436 views

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c# - WebAPI Return JSON array without root node

I have the following sample code in an EmployeeController that creates a couple of employees, adds them to an ... and parsing the JSON results See Question&Answers more detail:os...

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

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516 views

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c# - How to return Javascript from an ASP.NET 5 MVC 6 controller action

I need one Action return a JavaScript fragment. In MVC 5 we have: return JavaScript("alert('hello')"); but in MVC ... a way to do this now ? See Question&Answers more detail:os...

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

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506 views

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c# - Dynamics CRM how to get list of all entities

Working with CRM 2013, how can I get a list of all entities in the CRM via the connectionManager class? ... entities for the current connection. See Question&Answers more detail:os...

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

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541 views

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c# - IAsyncQueryProvider mock issue when migrated to .net core 3 adding TResult IAsyncQueryProvider

I did something similar to : How to mock an async repository with Entity Framework Core in one of my unit test project ... was in .net core 2.1 See Question&Answers more detail:os...

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

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484 views

1 answer

c# - want to open Link in external browser of WP7

The architecture is like: On click of a button an HTML page opens which contains a link in it. On clicking ... to be opened in external browser. See Question&Answers more detail:os...

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

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618 views

1 answer

c# - Updating a PropertyGrid

How can I have a property grid update automatically when the object in its SelectedObject property changes? ... from PropertyChanged events? See Question&Answers more detail:os...

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

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381 views

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c# - Why does Enum.Parse create undefined entries?

class Program { static void Main(string[] args) { string value = "12345"; Type enumType = typeof(Fruits); ... value) prior to Enum.Parse() See Question&Answers more detail:os...

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

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620 views

1 answer

c# - binding to value in Dictionary with enum as a key

I'm some application and i would like to bind some textboxes and chekcboxes to value field of Dictionary(Enum, ... to my case. Any advice? See Question&Answers more detail:os...

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

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409 views

1 answer

c# - Running simple winforms application on Mono for ARM

I am currently trying to set up an environment in which I can create winform applications with Visual Studio ... produces the problems 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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632 views

1 answer

c# - Microsoft Bot Framework - Clear Conversation State

I am making a bot using Microsoft's Bot Framework, and I've noticed that when I make changes and deploy to ... , I am currently using C#. See Question&Answers more detail:os...

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

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470 views

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c# 4.0 - Why doesn't reflection set a property in a Struct?

class PriceClass { private int value; public int Value { get { return this.value; } set { this.value = ... second is 0. No exception thrown See Question&Answers more detail:os...

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

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498 views

1 answer

c# - Can I stop service reference generating ArrayOfString instead of string[]?

I have a web method with a signature like this: public string[] ToUpper(string[] values) I am using the 'Add ... I am using ASMX web services. See Question&Answers more detail:os...

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

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481 views

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c# - Null reference on Entity Framework Migration

When I user the Add-Migration command of Entity Framework migration I get the following exception: System. ... cmdlet) Any insight? See Question&Answers more detail:os...

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

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439 views

1 answer

c# - How can I use the Like Operator with a Parameter in a SQLite query?

I can get the result I expect by entering this in LINQPad: SELECT * FROM WorkTable WHERE WTName LIKE " ... and simultaneously write safe code? See Question&Answers more detail:os...

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

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