Recent questions tagged C#

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c# - ThreadStatic v.s. ThreadLocal<T>: is generic better than attribute?

[ThreadStatic] is defined using attribute while ThreadLocal<T> uses generic. Why different design solutions were chosen ... in this case? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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415 views

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c# - Why is a round-trip conversion via a string not safe for a double?

Recently I have had to serialize a double into text, and then get it back. The value seems to not be ... numeric value Why did this happen? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

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c# - What size do you use for varchar(MAX) in your parameter declaration?

I normally set my column size when creating a parameter in ADO.NET. But what size do I use if the column is of type ... , ?????).Value = blah; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - A pattern for self-cancelling and restarting task

Is there a recommended established pattern for self-cancelling and restarting tasks? E.g., I'm working on the API for ... it's yet to be tested. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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524 views

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c# - Using WebSockets with ASP.NET Web API

What is the preferred method for using raw websockets in an ASP.NET Web API application? We'd like to use ... application that is up-to-date? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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918 views

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c# - Serilog - multiple log files

I am using Serilog for logging and cant' figure out how to separate log events to different files. For example, I ... but it didn't work too. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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512 views

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c# - Write to CSV file and export it?

In C# ASP.net, could someone show me how I can write entries from an Array/List to a CSV file on the server ... .com/my.csv and then export it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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588 views

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c# - How to solve circular reference?

How do you solve circular reference problems like Class A has class B as one of its properties, while ... handle those parent child scenarios? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Pick Random String From Array

How do I go about picking a random string from my array but not picking the same one twice. string[] names ... this. Any feedback is welcome. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to make EF-Core use a Guid instead of String for its ID/Primary key

When I look at the ASP.NET 3 Identity it uses a string and not a Guid for the unique primary key. ... will definitively not like these warnings. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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576 views

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c# - Nested namespaces

I've got something like this: namespace n1 { namespace n2 { class foo{} } } In other file I write: ... to make something like this possibile? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - System.Net.Mail creating invalid emails and eml files? Inserting extra dots in host names

It appears that .NET's SmtpClient is creating emails with an extra dot in host names if the dot was to ... other than writing our own encoding? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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510 views

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c# - Some help understanding "yield"

In my everlasting quest to suck less I'm trying to understand the "yield" statement, but I keep ... will the performance implications be? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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c# - Custom Validation Attributes: Comparing two properties in the same model

Is there a way to create a custom attribute in ASP.NET Core to validate if one date property is less ... ValidationAttribute if that was doable. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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543 views

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c# - Peculiar overload resolution with while (true)

I was implementing sync/async overloads when I came across this peculiar situation: When I have a regular lambda ... there a reason for it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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c# - Proper localization of a WinForms application

I have a WinForms application which I want to translate into multiple languages. However, I do not have ... WinForms localization Framework... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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697 views

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c# - System.Net.WebClient unreasonably slow

When using the System.Net.WebClient.DownloadData() method I'm getting an unreasonably slow response time. When ... Encoding.GetString(data); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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758 views

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c# - Serializing/deserializing with memory stream

I'm having an issue with serializing using memory stream. Here is my code: /// <summary> /// ... = (Dog)DeserializeFromStream(stream); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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470 views

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c# - What is the best way to get the executing exe's path in .NET?

From program a.exe located in c:/dir I need to open text file c:/dir/text.txt. I don't know where ... a Windows Applicaion. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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525 views

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c# - Case insensitive Regex without using RegexOptions enumeration

Is it possible to do a case insensitive match in C# using the Regex class without setting the RegexOptions. ... values: Taylor taylor taYloR See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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526 views

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c# - When to use a Cast or Convert

I am curious to know what the difference is between a cast to say an int compared to using Convert.ToInt32 ... both accomplishing the same goal. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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751 views

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c# - How to format TimeSpan in XAML

I am trying to format a textblock which is bound to a TimeSpan property. It works if the property is of type ... showing as: 19:10:46.8048860 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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555 views

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c# - Sequence contains no matching element

I have an asp.net application in which I am using linq for data manipulation. While running, I get the ... documentRow.DeleteRule; } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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c# - Async threadsafe Get from MemoryCache

I have created a async cache that uses .NET MemoryCache underneath. This is the code: public async Task< ... thread safe) Semaphore 64573360 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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956 views

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c# - Identifying active network interface

In a .NET application, how can I identify which network interface is used to communicate to a given IP address ... to my given database server. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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683 views

1 answer

c# - MVC Validation Lower/Higher than other value

How is the best way to validate a model in MVC.Net where I want to accept a minimum/maximum. Not ... is always less than Maximum cost. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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539 views

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c# - Importing Excel into a DataTable Quickly

I am trying to read an Excel file into a list of Data.DataTable, although with my current method it can take ... Excel Workbook List.Add(DT); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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c# - string.empty converted to null when passing JSON object to MVC Controller

I'm passing an object from client to server. Properties of the object which are represented as string.empty ... individually on the server. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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