Recent questions tagged C#

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c# - datetime issue with 01/01/1900

i have a datetime column in sql server and its optional field and if the user decided not to enter then i ... } return getDeadlineDate.Value; } 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# - Exception error message with incorrect line number

When an exception is thrown in an Asp.Net web page, an error message is displayed with the complete stack ... the corresponding line 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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256 views

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c# - How to use the IN operator in linq

I'm querying a view and filtering the results with a column named status. I'd like to query it so I can search ... ..') How can I 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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c# - Will CLR handle both CLS-Complaint and non-CLS complaint exceptions?

Just for my clarification : Can i throw both CLS-Complaint and non-CLS complaint exceptions in .NET Framework ?.I ... have a simple example?). 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# - How to make the startup form initially invisible or hidden

How to make the startup form initially invisible or hidden I have a GUI project with 2 form and the forms have ... user from the System Tray. See Question&Answers more detail:os...

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

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828 views

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c# - Simple way to compare Dates in DateTime attribute using Entity Framework 4 and Linq queries

I'm trying to run the following bit of code, but the comparison fails by not handing my the ... entity navigation properties are supported. See Question&Answers more detail:os...

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

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228 views

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c# - How can I get better results when shrinking an image

I'm scaling images down in c#, and I've compared my methods with the best method in Photoshop cs5 and cannot ... is the starting image (1mb). 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# - What is the difference between <%# and <%= in ASP.NET MVC?

What is the difference between <%# and <%= in ASPX inline 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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521 views

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c# - Using VS2010 Profiler for memory measurement

I'm looking for using Built-in Visual Studio 2010 Profiler for measure memory usage of my C# functions in a ... is missing, and thanks alot 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# - DateTimePicker garbled after Windows 10 Creators Update

Application built with VS 2015, C#, Winforms, using the DateTimePicker Windows control, text is garbled after ... suggested work around ? 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# - Detecting deactivation and app close in Windows Phone 8.1 XAML

For security reasons, I need to log out the users when they exit the app and show login screen when they return ... Phone 8.1 XAML project). See Question&Answers more detail:os...

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

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261 views

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c# - Why isn't my WPF Datagrid showing data?

This walkthrough says you can create a WPF datagrid in one line but doesn't give a full example. So I created an example ... "Smith" }); } } } See Question&Answers more detail:os...

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

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994 views

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c# - Error setting X509Certificate2 PrivateKey

I am migrating a .NetFramework 4.6.1 library to a .NetCore 2.2. But i am unable ... .X509Certificate2.set_PrivateKey(AsymmetricAlgorithm value) See Question&Answers more detail:os...

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

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258 views

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c# - Solving a timeout error for SQL query

I am getting this error: Timeout expired. The timeout period elapsed prior to completion of the operation or the server ... =ad; Password =aa"); See Question&Answers more detail:os...

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

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374 views

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c# - 'System.Web.WebPages.Html.HtmlHelper' does not contain a definition for 'ActionLink

Firstly - I have scoured SO and found many questions asking the same thing, though simply adding <add ... , Boolean& completedSynchronously) +69 See Question&Answers more detail:os...

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

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819 views

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c# - How to make a static variable thread-safe

I have this static class which contains a static variable (a simple int). I've implemented a lock() in the ... this variable "more" thread-safe? See Question&Answers more detail:os...

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

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719 views

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c# - Background worker - report progress with string array

I need to return multiple STRING values from my backgroundworker in each loop, so I tried to use ReportProgress ... set results array values. See Question&Answers more detail:os...

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

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569 views

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c# - Building a sorted dictionary using ToDictionary

I'm not an expert in C# and LINQ. I have a Dictionary, which I understand a hash table, that is, keys ... other than a typical hash table? 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# - Create type "MyClass : OtherClass<MyClass> { }" at runtime?

Is it possible in C# to create a type at runtime that inherits from a generic class where the template parameter ... constraint of type 'T'. See Question&Answers more detail:os...

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

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696 views

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c# - How yield implements the pattern of lazy loading?

How yield implements the pattern of lazy loading? See Question&Answers more detail:os...

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

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448 views

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c# - logging in log4net to different appenders based on circumstances

I am using log4net and in one class require logging to a RollingFile appender, but then in another class, I wish to ... both?"); } 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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284 views

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c# - How can I make many pings asynchronously at the same time?

I just can't seem to understand how to structure an asynchronous call to SendPingAsync. I want to loop through a ... I'm just not getting 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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256 views

1 answer

c# - How long does it take to invoke an empty function?

I have a list of items implementing an interface. For the question, let's use this example interface: interface ... an object that does nothing. See Question&Answers more detail:os...

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

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392 views

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c# - Rhino Mocks AAA Quick Start?

I've been looking around for some decent information on using Rhino Mocks 3.5+ with the AAA syntax. I ... links would be totally appreciated! See Question&Answers more detail:os...

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

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301 views

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c# - MVC 4 Simple Populate DropDown from database model

I feel a bit stupid. I'm trying to get a hang of MVC 4, using boxing as a functional ... Model.WeightCategories.First().WeightCategoryId)) See Question&Answers more detail:os...

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

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215 views

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c# - Initializing Class Fields at the Field Definition or in Class Constructor

I have a class with a field that needs to be initialized when the object is initialized, such as a list ... a field directly like in MyClass2? 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

1 answer

c# - Using URL Routing for Web Forms and StopRoutingHandler for Favicon

I have a website where I need to add a Favicon.ico. The site is written using ASP.NET 3.5 Web Forms ... because it is not an MVC application. See Question&Answers more detail:os...

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

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938 views

1 answer

c# - Serializing an object using Json.Net causes Out of Memory exception

Disclaimer: I did went through most of the solution provided here but most of them were talking about OOM exception ... Windows store app dll's. See Question&Answers more detail:os...

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

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