Recent questions tagged C#

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c# - Local variable with same name as instance variable = unexpected results

ASP.NET 4.0 Webforms project. I have the following in my code-behind. public partial class _Default : System. ... explain this behavior to me? See Question&Answers more detail:os...

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

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475 views

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c# - How to use parameters in Entity Framework in a "in" clause?

I am using Entity Framework 4.0 and I want to use the following query: To do that I do the following: ... , if that is possible. 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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1.1k views

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c# - Preventing double.Parse from removing trailing zeros after decimal place?

When using double.Parse, it seems to like to string away any trailing (insignificant) zeros from the string ... any string operations on 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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398 views

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c# - How to upload/display images using ASP.net MVC4 with Entity Framework

I have a data model like so public class NewsItem { public virtual int Id { get; set; } public virtual string ... on this would be grand. Cheers See Question&Answers more detail:os...

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

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774 views

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c# - LINQ to Entities does not recognize the method 'System.Object Parse(System.Type, System.String)'

I am getting this error, i am trying to resolve it long but unable to fix it. LINQ to Entities does not ... >()); return lstCust; } See Question&Answers more detail:os...

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

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501 views

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c# - How to contol the time interval in a DateTimePicker

I have a DateTimePicker control on a form specified like so: dtpEntry.Format = DateTimePickerFormat.Custom; dtpEntry ... would accomplish 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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623 views

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c# - Checkbox OnClick/ItemCommand in Repeater or DataList

I need to do some server side logic on a row in my repeater when a CheckBox is clicked inside the repeater ... you cant get the repeater row. See Question&Answers more detail:os...

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

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590 views

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c# - Is there a way to programatically check airplane mode status?

I am creating project in which i required API to know airplane mode status on in windows phone.or any other way to know status. See Question&Answers more detail:os...

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

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542 views

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c# - How to launching email client on LinkButton click event?

How can I launch an Outlook email window (similar to what mailto: does in a hyperlink) ? This needs to be done in a LinkButton click event. See Question&Answers more detail:os...

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

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506 views

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c# - How to retrieve more than one column using ExecuteScalar?

I am getting one column using ExecuteScalar: cmd.commandtext = "select rodeuser from customer_db_map"; string ... is this achieved? See Question&Answers more detail:os...

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

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550 views

1 answer

c# - Explicit Element Closing Tags with System.Xml.Linq Namespace

I am using the (.NET 3.5 SP1) System.Xml.Linq namespace to populate an html template document with div tags of ... div> instead of <div /> ? See Question&Answers more detail:os...

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

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430 views

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c# - explicit interface implementation, why explicit casting

When a class explicitly implements an interface why do you need to explicitly cast the class instance to interface ... to IDictionary. 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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467 views

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c# - TypeNameHandling with attribute on a class

I use TypeNameHandling to serialize and deserialize a list of derived class in json. It work perfectly with a ... attribute on the base class See Question&Answers more detail:os...

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

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411 views

1 answer

c# - linq to entities generated sql

I am having some problems with linq to entities in the ado.net entity framework. Basically what I'm doing ... command tree or generated query? See Question&Answers more detail:os...

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

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655 views

1 answer

c# - How to Convert decimal number to time or vice versa

here is an example if 8.30 is there it should be 8 hours 30 minute if 8 hour 20 minutes then 8.20 Please tell ... it is possible ? if yes how ? See Question&Answers more detail:os...

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

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506 views

1 answer

c# - Ambiguous call between overloads of two-way implicit castable types when a derived type of one is passed as parameter

(Trying to find a title that sums up a problem can be a very daunting task!) I have the following ... The questions are still valid though. See Question&Answers more detail:os...

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

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401 views

1 answer

c# - How do I get the “Add Controller” and “Add View” menu options in my ASP.NET MVC 5 project?

I upgraded my solution from MVC 4 to MVC 5 in Visual Studio 2012 using this tutorial. In the last step I ... add them to my .csproj file? 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

1 answer

c# 2008 SQL Server Express Connection String

I have a 2008 SQL Server Express installed on one of my machines and I'm attempting to establish a remote ... =the_password;Connect Timeout=0";" 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

1 answer

c# - HTML Agility Pack

I want to parse the html table using html agility pack. I want to extract only some predefined column data from ... only name and address data. See Question&Answers more detail:os...

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

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464 views

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c# - Skip and Take not working with MySQL EntityFrameworkCore

I am trying to paginate Products from MySQL db, but if I use Skip() or Take() it returns an empty Json ... this problem or know a workaround? See Question&Answers more detail:os...

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

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546 views

1 answer

c# - Why do i get E_ACCESSDENIED when reading public shortcuts through Shell32?

I'm trying to read the targets of all desktop shortcuts in a C# 4 application. The shortcuts on a windows desktop can ... , 64-bit. be well -h- See Question&Answers more detail:os...

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

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555 views

1 answer

c# - Use (certain) lambda expressions when targeting .NET 2.0?

ReSharper suggests we change: System.Net.ServicePointManager.ServerCertificateValidationCallback += delegate(object sender, ... should do? See Question&Answers more detail:os...

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

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444 views

1 answer

c# - How to check if string contains single occurence of substring?

I have this: string strings = "a b c d d e"; And I need something similar to string.Contains(), but I ... SINGLE time. 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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583 views

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c# - DisplayName on Model that use Entity Framework

I have a code that look like this : public class MyModel { [Required] [Display(Name = "labelForName", ... and updated with the ORM? See Question&Answers more detail:os...

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

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458 views

1 answer

c# - 30Mb limit uploading to Azure DataLake using DataLakeStoreFileSystemManagementClient

I am receiving an error when using _adlsFileSystemClient.FileSystem.Create(_adlsAccountName, destFilePath, stream, ... portal interface. See Question&Answers more detail:os...

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

0 votes

634 views

1 answer

c# - Delete files older than a date

I am currently working on a c# program where I check the creation time of a file and delete it if the file is ... what I would expect it to. See Question&Answers more detail:os...

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

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449 views

1 answer

c# - Unity: The type LogWriter cannot be constructed

For the following "project" I am getting a very annoying and inexplicable error when resolving Unity for ... exceptionHandling> </configuration> See Question&Answers more detail:os...

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

0 votes

475 views

1 answer

c# - How can I debug SessionStateModule/REQUEST_AQUIRE_STATE taking > 100 seconds on half of my requests?

This started happening in the last few days; possibly since I installed Visual Studio 2012. It's currently only ... has been called (jQuery) See Question&Answers more detail:os...

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

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