Recent questions tagged C#

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c# - WPF add datagrid image column possible?

Using C#.Net 4.5, Visual Studio 2012 Ulti, WPF. I've got some old win-forms code that i wanted to ... syntax? Thanks for the help guys 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

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c# - Overload resolution of virtual methods

Consider the code public class Base { public virtual int Add(int a,int b) { return a+b; } } public ... not calling the more specific method? See Question&Answers more detail:os...

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

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356 views

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c# - Using Reflection to determine which Fields are backing fields of a Property

I'm using reflection to map out objects. These objects are in managed code but I have no visibility into ... field of the indexed property? 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# - Looking for an object graph tree-view control for WPF

I'm trying to find code or a pre-packaged control that takes an object graph and displays the public properties and ... winforms or com, etc... See Question&Answers more detail:os...

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

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174 views

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c# - Get distinct list values

i have a C# application in which i'd like to get from a List of Project objects , another List which contains ... this? How can i fix 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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456 views

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c# - Most efficient Dictionary<K,V>.ToString() with formatting?

What's the most efficient way to convert a Dictionary to a formatted string. e.g.: My method: public string ... a generic version look like? See Question&Answers more detail:os...

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

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289 views

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c# - Data Protection provider across Asp.NET Core and Framework (generate password reset link)

I am running into this problem relating to the DataProtectionProvider, first we only had 2 .NET Framework projects, ... . -1 for 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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378 views

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c# - Reactive Throttle returning all items added within the TimeSpan

Given an IObservable<T> is there a way to use Throttle behaviour (reset a timer when an item is added, ... this functionality out the box. 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# - IDW10201: Neither scope or roles claim was found in the bearer token

I have a ASP.NET Core 3.1 project like this sample: Sign-in a user with the Microsoft Identity Platform in a WPF ... false; [...more 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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309 views

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c# - Compare value to array of strings using StartsWith

I have an array: string[] exceptions = new string[] { "one", two", "one_1", "three" }; . ... whose property startswith the exception string. See Question&Answers more detail:os...

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

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334 views

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c# - Check if Action is async lambda

Since I can define an Action as Action a = async () => { }; Can I somehow determine (at run time) whether the action a is async 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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201 views

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c# - Best way to project ViewModel back into Model

Consider having a ViewModel: public class ViewModel { public int id { get; set; } public int a { get; set; ... vice-versa I always face errors. See Question&Answers more detail:os...

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

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364 views

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c# - Changing column default values in EF5 Code First

I'm trying to use CF to build a model for an existing database. I have a column in which I forgot to ... /re-create the default value easily. See Question&Answers more detail:os...

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

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356 views

1 answer

c# - Programmatically enable (install) IIS

Sometimes there is a PC that doesn't have IIS. Either it disabled or either it not installed. In this case I ... didn't find the right one). See Question&Answers more detail:os...

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

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356 views

1 answer

c# - ASP.NET Core RC2 Seed Database

My problem is i am trying to seed an Entity Framework Core database with data and in my mind the below code ... together. Thanks for any help. See Question&Answers more detail:os...

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

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327 views

1 answer

c# - Observable Collection Property Changed on Item in the Collection

I have an ObservableCollection<T>. I've bound it to a ListBox control and I've added ... child elements implement INotifyPropertyChanged. See Question&Answers more detail:os...

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

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633 views

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c# - Reload app.config with nunit

I have multiple NUnit tests, and I would like each test to use a specific app.config file. Is there a way ... new config file before each test? 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 call Dispose() before main() exits?

My .net service cleans up all its unmanaged resources by calling resourceName.Dispose() in a finally block before ... longer being used, right? See Question&Answers more detail:os...

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

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331 views

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c# - Activation error occured while trying to get instance of type Database, key "" <-- blank

I'm trying out the Enterprise Library 5.0 and was doing some unit-tests on my BL, do I need to ... /> </connectionStrings> </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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429 views

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c# - Using Linq to Select properties of class to return IEnumerable<T>

If I have a SortedList<int, MyClass> and I want to return a new IEnumerable<T> of properties from that class ... ) but it doesnt work. 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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455 views

1 answer

c# - How to set focus on listbox item?

I have a defined list box like this: var listBox = new ListBox(); listBox.Items.Add(1); listBox.Items.Add(2 ... t have to press the arrow twice. See Question&Answers more detail:os...

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

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344 views

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c# - Webbrowser disable all audio output - from online radio to youtube

My webbrowser: XAML: //... xmlns:my="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration" //. ... do this in 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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242 views

1 answer

c# - How to pass cookies to HtmlAgilityPack or WebClient?

I use this code to login: CookieCollection cookies = new CookieCollection(); HttpWebRequest request = (HttpWebRequest) ... .. 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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262 views

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c# - Threadsafe foreach enumeration of lists

I need to enumerate though generic IList<> of objects. The contents of the list may change, as in being ... objects referenced by the list. See Question&Answers more detail:os...

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

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351 views

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c# - Sync Vs. Async Sockets Performance in .NET

Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially ... to one server. See Question&Answers more detail:os...

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

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328 views

1 answer

c# - Changing the DefaultValue of a property on an inherited .net control

In .net, I have an inherited control: public CustomComboBox : ComboBox I simply want to change the default value ... hard to describe in detail. See Question&Answers more detail:os...

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

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305 views

1 answer

c# - wrapping MemoryStream in a using

I've been told that System.IO.MemoryStream need not be wrapped in a using block because there is no underlying resource, ... )) { // 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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303 views

1 answer

c# - Will lock() statement block all threads in the process/appdomain?

Maybe the question sounds silly, but I don't understand 'something about threads and locking and I would like to ... much as I have threads? See Question&Answers more detail:os...

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

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