Recent questions tagged C#

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c# - Passing array to function that takes either params object[] or IEnumerable<T>

I want to pass an array of custom objects to a function like String.Join which has the following signatures: ... if that makes any difference. See Question&Answers more detail:os...

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

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403 views

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c# - what does a using statement without variable do when disposing?

I've always used using with variable and assignment. Now i have like this a class DbProviderConnection: ... .Transaction.Dispose called? See Question&Answers more detail:os...

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

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346 views

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c# - Execute javascript function after asp.net postback without Ajax

I wish to execute a javascript function after asp.net postback with out using ajax. I've tried the following in ... ('Livraison',556);"); See Question&Answers more detail:os...

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

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413 views

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c# - Http MultipartFormDataContent

I have been asked to do the following in C#: /** * 1. Create a MultipartPostMethod * 2. Construct the ... .Show(result.Result.ToString()); See Question&Answers more detail:os...

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

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247 views

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c# - Restricting T to string and int?

I have built myself a generic collection class which is defined like this. public class StatisticItemHits<T>{...} ... What am I doing wrong? See Question&Answers more detail:os...

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

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733 views

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c# - Task.WhenAny and Unobserved Exceptions

Let's say I have three tasks, a, b, and c. All three are guaranteed to throw an exception at a random ... using TaskEx.WhenAny in that case). See Question&Answers more detail:os...

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

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451 views

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c# - How to write data to a text file without overwriting the current data

I can't seem to figure out how to write data to a file without overwriting it. I know I can use File. ... text file. Thanks for reading 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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284 views

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c# - How to compare two DateTime to seconds?

How to compare two DateTime to seconds? See Question&Answers more detail:os...

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

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263 views

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c# - Difference between Keys.Shift and Keys.ShiftKey

In my application i detect when a key is pressed and see if the modifier is the shift key but the Keys ... .ControlKey) Thanks for any input. 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# - How does catching an OutOfMemoryException work?

I am a little bit confused about the fact that we can just catch an OutOfMemoryException using a try/catch ... required for further execution? See Question&Answers more detail:os...

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

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326 views

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c# - Return Anonymous Type from a function

Can I use an anonymous type as a return type in a Function, and then stuff that returned value into an array ... .Add(GetRowGroups("col3")); } See Question&Answers more detail:os...

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

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330 views

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c# - How to expand environment variable %CommonProgramFiles%system in .NET

I have a situation where I need to return a directory path by reading the registry settings. Registry value returns ... path in .net 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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633 views

1 answer

c# - Using .StartsWith in a Switch statement?

I'm working on a Switch statement and with two of the conditions I need to see if the values start with a ... ; default: return "ABCXYZ123"; } See Question&Answers more detail:os...

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

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387 views

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c# - How do I convert StreamReader to a string?

I altered my code so I could open a file as read only. Now I am having trouble using File.WriteAllText because ... , content, Encoding.UTF8); } See Question&Answers more detail:os...

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

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245 views

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c# - How to change language version in Visual Studio 2015

I want to use the nameof operator in my C# project in Visual Studio 2015 but the compiler complains with ... version from Visual Studio 2015. See Question&Answers more detail:os...

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

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241 views

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c# - Access to the value of a Custom Attribute

I've got this custom attribute: [AttributeUsage(AttributeTargets.Method, AllowMultiple=false, Inherited = true)] ... the custom attribute? See Question&Answers more detail:os...

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

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196 views

1 answer

c# - Force all axis labels to show

In ASP.NET Column Chart, when the chart size is small some axis labels are not shown. Question: How can I ... even if they have to overlap? 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# - Calculating Weighted Average with LINQ

My goal is to get a weighted average from one table, based on another tables primary key. Example Data: Table1 Key ... roughly 55.3. 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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250 views

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c# - Sort an int array with orderby

I would like to sort my int array in ascending order. first I make a copy of my array: int[] copyArray ... linq.iorderedenumerable' to 'int[]'" See Question&Answers more detail:os...

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

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373 views

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c# - How to set the DataGridViewCell to automatically word wrap?

The code below which I found on MSN did not worked to automatically word-wrap a cell: dataGridView.Columns[0] ... .True; Any more answer? See Question&Answers more detail:os...

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

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207 views

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c# - Version number of a dll in .NET

Given the following: string file = @"c:somepathsomefile.dll"; How can I find the file and product version ... either native or managed. 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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281 views

1 answer

c# - ASP.NET MVC 3 Razor Syntax - Casting

So, simple question really. :) I had this following code with ASPX View Engine: <strong><%: ((City)Model. ... @using with Razor). Thanks 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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247 views

1 answer

c# - Equality and polymorphism

With two immutable classes Base and Derived (which derives from Base) I want to define Equality so that equality is ... ways to achieve 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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383 views

1 answer

c# - How to add external native dependency dll?

I have two projects. First is a Windows Forms Application project and second is a class library project. Сlass ... workplace. Sincerely, Denis. 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# - Get distinct records using linq to entity

Hi I'm using linq to entity in my application. I need to get distinct records based on one column value "Name ... , i.datecreated}).Distinct(); See Question&Answers more detail:os...

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

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628 views

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c# - How do I use HashSet<T> as a dictionary key?

I wish to use HashSet<T> as the key to a Dictionary: Dictionary<HashSet<T>, TValue> myDictionary = new ... I am missing something 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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445 views

1 answer

c# - Stop Visual Studio from putting using directives outside namespace

Is there a setting in Visual Studio (or ReSharper) that allows you to specify what namespaces should be default and ... class Class1 { } } See Question&Answers more detail:os...

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

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493 views

1 answer

c# - Exchange Web Service FolderId for a not well known folder name

I have a folder in an Exchange mailbox that is a child of the root (not Inbox). How do I ... find are those relating to WellKnownFolderNames. See Question&Answers more detail:os...

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

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