Recent questions tagged C#

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c# - Create ADO.NET DataView showing only selected Columns

In C# & .NET, can one create a DataView that includes only a proper subset of the DataColumns of a given ... "projection" operation (π)? 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# - Connection Pooling in .NET/SQL Server?

Is it necessary or advantageous to write custom connection pooling code when developing applications in .NET with an ... built into ADO.NET? 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# - XML deserializing only works with namespace in xml

The most simple way I get ServiceStack xml deserialization to work is when the xml contains a namespace. However, ... in the incoming xml. 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# - strange out-of-memory exception during serialization

I am using VSTS2008 + C# + .Net 3.5 to run this console application on x64 Server 2003 Enterprise with 12G ... ; } thanks in advance, George 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# - HttpClient with .Net Core 2.1 hangs

Given the following .Net Core 2.1 Console App... using System; using System.Diagnostics; using ... /corefx/issues/30166#issuecomment-395489603 See Question&Answers more detail:os...

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

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377 views

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c# - How to remove 3d border (sunken) from MDIClient component in MDI parent form?

I am developing WinForms MDI app in VS2010 (.NET 4.0) and I just hate 3D border in MDI parent form. So any ... or just no border it all) ? 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 SQL Server database file (.mdf) in Visual Studio without installing SQL Server Express Edition?

I have an error below adding an .mdf file (SQL Server Database) in a Visual Studio 2010 project ... using Visual Studio 2010 Ultimate See Question&Answers more detail:os...

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

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325 views

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c# - Background worker exception handling

I am slightly confused on how to deal with an exception. I have a background worker thread that runs some long ... you should just use "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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c# - MVC 3 Area route not working

I created a Area in my MVC 3 application called 'Blog'. In global.asax I have the following code. public static ... .vbhtml How do I solve 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# - Wiring up Simple Injector in WebForms in .NET 4.7.2

With the changes in .NET 4.7.2, constructor injection is now possible in Web Forms. I have gotten Simple ... there to be any scoped containers. See Question&Answers more detail:os...

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

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260 views

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c# - Generating Interfaces from entity framework database first auto-generated code

I am using MVC3, C# 4.0 and Entity Framework in Visual Studio 2010. I am generating my edmx and ... regenerate the interfaces. Thank you See Question&Answers more detail:os...

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

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291 views

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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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367 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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209 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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180 views

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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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189 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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338 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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342 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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383 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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604 views

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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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417 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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295 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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319 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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479 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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243 views

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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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347 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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284 views

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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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418 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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