ASP.NET
A set of technologies in the .NET Framework for building web applications and XML web services.
3,251 questions
1 answer
prevent "Object reference not set to an instance of an object. " when query returns no results
I have the following method of my Applicant class that runs a query and returns a string. public string GetPhoneFromSmsLog(string UserID) { using (SqlConnection oConn = new…
asked 2022-06-02T16:13:36.373+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(300.8, 98%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMJ%3C/text%3E%3C/svg%3E)
M J
661
Reputation points
commented 2022-06-06T02:58:42.967+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(195.2, 51%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYS%3C/text%3E%3C/svg%3E)
Yijing Sun-MSFT
7,066
Reputation points
1 answer
Testing OpenGl Graphics on Android Emulator/Device
Hi, This seems impossible. adb shell dumpsys gfxinfo Only collects around 2 frames. The Android Device Monitor's systrace appears to collect frame data, but always shows no janky frames, which is obviously incorrect given the jerky movement on…
asked 2022-05-23T09:28:47.17+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 26%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Andrew Azz
171
Reputation points
commented 2022-06-06T02:28:50.817+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(316.8, 40%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYL%3C/text%3E%3C/svg%3E)
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.)
35,291
Reputation points Microsoft Vendor
1 answer
About Location in xamarin forms
How to find if Location is turned on or off in settings through code. i have this xam.plugin. geolocator. i use this code but it is not working. IGeolocator Locator = CrossGeolocator.Current; protected override void OnAppearing() {…
asked 2022-05-26T14:59:41.78+00:00
Asgar Ali
86
Reputation points
commented 2022-06-06T02:06:30.613+00:00
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.)
35,291
Reputation points Microsoft Vendor
1 answer
Microsoft Identity Extending tables
hello I am using Microsoft identity in my asp.net core project and i extended the table AspNetUsers by inherit from it a class called appicationUsers, after that i created many tables related to my own project and linked those table with the mentioned…
asked 2022-06-03T14:15:48.037+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(294.40000000000003, 12%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EL%3C/text%3E%3C/svg%3E)
lighto22
1
Reputation point
answered 2022-06-06T01:55:49.597+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(73.60000000000001, 90%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZL%3C/text%3E%3C/svg%3E)
Zhi Lv - MSFT
32,011
Reputation points Microsoft Vendor
1 answer
In C# WPF, is there a way to make it sort to the top of the listview whenever a new item is added?
I'm making a WPF app that implements a folder explorer. And I want to add a new folder item to the top of the folder list view when the new folder button is pressed. So I put a code that adds a sortdirection to sort by date, folder, and filename. …
asked 2022-05-31T16:21:57.613+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 82%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
JunYoungLee
161
Reputation points
commented 2022-06-06T01:44:42.793+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 11%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHL%3C/text%3E%3C/svg%3E)
Hui Liu-MSFT
38,191
Reputation points Microsoft Vendor
1 answer
One of the answers was accepted by the question author.
How can I redisplay the paragraph break vertical lines in visual studio?
I am working with visual studio 2022. However, the vertical line disappeared as shown in the picture below, probably because I pressed something wrong. However, vertical lines are visible in other code windows as shown on the right. How can I make…
Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,670 questions
C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,231 questions
Visual Studio Testing
Visual Studio Testing
Visual Studio: A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.Testing: The act or process of applying tests as a means of analysis or diagnosis.
328 questions
asked 2022-06-05T09:32:41.2+00:00
JunYoungLee
161
Reputation points
commented 2022-06-05T23:29:12.95+00:00
JunYoungLee
161
Reputation points
1 answer
Custom claims are not kept after 15 minutes
is in Hello, I developed an ASP.NET MVC application which uses ASP.NET Identity 2 and OWIN to provide authentication. All works perfectly but authentication after I changed cookie duration to 30 days (it was 15 minutes before, the default). I have…
asked 2022-01-05T13:36:19.237+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 20%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJS%3C/text%3E%3C/svg%3E)
Jaime Stuardo
51
Reputation points
answered 2022-06-05T22:37:07.413+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Bruce (SqlWork.com)
55,601
Reputation points
1 answer
Download Android device issue in MAUI project
I created the first project of MAUI and choose the Android Emulator. In the window of Android Device Manager, I failed to download the default device Pixel 5 - API 30 with bellow error: Network is not reachable. Please check your connection and try…
asked 2022-06-03T09:40:33.597+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(169.60000000000002, 56.00000000000001%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
TracyLiang
41
Reputation points
commented 2022-06-05T18:54:34.28+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 52%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERC%3C/text%3E%3C/svg%3E)
Rob Caplan - MSFT
5,412
Reputation points Microsoft Employee
8 answers
unable to deploy .net core app on a shared linux hosting
Hi, .net core app is supposed to be a multi platform app. For some reason no shared Linux hosting (like a2hosting.com) is allowing .net core app their linux shared hosting servers.
.NET Runtime
.NET Runtime
.NET: Microsoft Technologies based on the .NET software framework.Runtime: An environment required to run apps that aren't compiled to machine language.
1,118 questions
asked 2020-12-11T12:43:00.263+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 28.000000000000004%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMC%3C/text%3E%3C/svg%3E)
Mohamed Cisse
1
Reputation point
answered 2022-06-05T16:10:27.487+00:00
Bruce (SqlWork.com)
55,601
Reputation points
3 answers
One of the answers was accepted by the question author.
IIS Form Authentication template
Hi, perhaps someone will share the source code of the authentication web page. Perhaps there is a standard page? There is an iis resource where basic authentication is used. After opening the page, a window for entering a name and password appears.…
Internet Information Services
Internet Information Services
Microsoft web server software.
1,578 questions
.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,368 questions
ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,156 questions
asked 2022-06-04T06:54:45.36+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 86%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMP%3C/text%3E%3C/svg%3E)
Mountain Pond
1,101
Reputation points
accepted 2022-06-05T15:27:10.53+00:00
Mountain Pond
1,101
Reputation points
1 answer
One of the answers was accepted by the question author.
Visual studio publish..
so i used visual studio a while back to create simple windows form apps but now that i created one and i try to publish it / build it into a single EXE i dont get the option, i can only pick to publish it online or something or that users have to use…
asked 2022-06-05T00:23:07.62+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 54%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMB%3C/text%3E%3C/svg%3E)
mattheo baaij
21
Reputation points
accepted 2022-06-05T10:10:34.253+00:00
mattheo baaij
21
Reputation points
1 answer
One of the answers was accepted by the question author.
RAM overflows and the application slows down, when the application is loaded with a large amount of Microsoft Access data (ADO.NET)
Hi I use the following algorithm to load data into my application. XAML: <Window.Resources> <local:DatabaseDataSet x:Key="Database_DataSet"/> <CollectionViewSource…
.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,368 questions
Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,670 questions
SQL Server
SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
12,692 questions
C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,231 questions
XAML
XAML
A language based on Extensible Markup Language (XML) that enables developers to specify a hierarchy of objects with a set of properties and logic.
762 questions
2 answers
One of the answers was accepted by the question author.
How to refresh the child razor component on the bases of provided text box which is resided in parent razor component (by using a razor class library)?
Hi, I need to refresh the child razor component on the bases of provided text box which is resided in parent razor component (by using a razor class library) What I want that ASAP user type 5th character or more in the textbox , a call should go the…
asked 2022-06-02T13:49:29.027+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 91%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMT%3C/text%3E%3C/svg%3E)
mehmood tekfirst
766
Reputation points
commented 2022-06-04T11:14:14.727+00:00
mehmood tekfirst
766
Reputation points
1 answer
One of the answers was accepted by the question author.
Why when using filcesystemwatcher and dictionary with fileinfo it's throwing exceptions on wrong key and file not found ?
Link for the repository on github : https://github.com/chocolade1972/FileSystemWatcher The project size is 92 KB only compressed with winrar. At the top i init with new instance both filelist and dic variables. Then when starting watching…
Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,670 questions
C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,231 questions
XAML
XAML
A language based on Extensible Markup Language (XML) that enables developers to specify a hierarchy of objects with a set of properties and logic.
762 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 46%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
1 answer
Passing multiple parameters with MessagingCenter
Hi, I got this from the Microsoft KB that allows to pass a parameter through MessagingCenter MessagingCenter.Send<object, string>(this, App.ShowPINActivation, email_address); but how can I pass two parameters like this: …
Xamarin
Xamarin
A Microsoft open-source app platform for building Android and iOS apps with .NET and C#.
5,293 questions
C#
C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
10,231 questions
asked 2022-06-03T21:13:35.82+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 31%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJA%3C/text%3E%3C/svg%3E)
Jassim Al Rahma
1,521
Reputation points
answered 2022-06-04T03:47:55.317+00:00
Viorel
112.1K
Reputation points
1 answer
One of the answers was accepted by the question author.
How to use IFormCollection instead of IFormFile
I have a controller that used to use the IFormFile interface, and I could CopyTo the filestream using the FileName. IActionResult Upload(IFormFile files) { var infile = Path.Combine(env.ContentRootPath, @"wwwroot\images",…
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 94%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
1 answer
One of the answers was accepted by the question author.
VS 2022 C# ComboBox operations using WinForms. Adding data from SQL server and later capturing selected value.
I am looking the way to allocate data from SQL server table. get 2 columns (ProductID (int) and ProductName (string) from database table into ComboBox. show only product name. Capture selected value in drop down of comboBox. The trick is to get…
asked 2022-06-03T13:33:41.2+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(38.4, 97%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEJ%3C/text%3E%3C/svg%3E)
Ed Januskis
66
Reputation points
accepted 2022-06-03T18:09:25.93+00:00
Ed Januskis
66
Reputation points
2 answers
Issue in Implementing Windows Authentication and LDAP in .NET 6
Hi Team, We have a intranet web api hosted in Windows box (on prem) which is consumed by our Angular UI and we need to implement Integration Windows Authentication in the API side. I was looking into the MS docs (see below url) and noticed that there…
asked 2022-05-30T19:04:57.923+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 76%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESP%3C/text%3E%3C/svg%3E)
Srivastava, Prashant
1
Reputation point
commented 2022-06-03T14:59:37.973+00:00
Bruce (SqlWork.com)
55,601
Reputation points
2 answers
SAP crystal reports runtime engine for .net framework 4 installation issue in windows 11
I am not able to install SAP crystal reports runtime engine for .net framework 4(32 bit Version: 13.0.3.162) in windows 11(Version: 21H2 , OS Build: 22000.556). Error Message: Product: SAP Crystal Reports runtime engine for .NET Framework (32-bit) --…
.NET Runtime
.NET Runtime
.NET: Microsoft Technologies based on the .NET software framework.Runtime: An environment required to run apps that aren't compiled to machine language.
1,118 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
8,145 questions
asked 2022-05-25T12:43:32.567+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 15%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
anil awati
11
Reputation points
commented 2022-06-03T10:12:49.747+00:00
anil awati
11
Reputation points
1 answer
Implementing request varification tokan
I have read some articles on preventing cross site requests within an webpage by using request verification token in MVC and ASP.NET Core application. But is there a way to implement this token in a classic ASP.NET application
asked 2022-05-31T06:08:42.537+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(131.20000000000002, 73%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Adeel Mirza
121
Reputation points
commented 2022-06-03T08:36:06.613+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 36%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELH%3C/text%3E%3C/svg%3E)
Lan Huang-MSFT
25,471
Reputation points Microsoft Vendor