10,656 questions with C#-related tags

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System.NullReferenceException: 'Object reference not set to an instance of an object.'

Hi guys if i uncomment code below it will error with System.NullReferenceException: 'Object reference not set to an instance of an object.' lvOrders was null . If i comment its ok , i started debug and every thing run ok and i check if i…

.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,651 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.
10,656 questions
asked 2024-07-19T16:17:23.72+00:00
doan gioi 0 Reputation points
commented 2024-07-20T02:34:03.7366667+00:00
doan gioi 0 Reputation points
1 answer One of the answers was accepted by the question author.

RegistryKeyPermissionCheck.ReadWriteSubTree vs boolean Writable

Hello, When using Registry OpenSubKey, I can set either RegistryKeyPermissionCheck.ReadWriteSubTree or Writable boolean property = True. Using MyKey As RegistryKey = Registry.LocalMachine.OpenSubKey("App.Blah\DefaultIcon",…

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.
10,656 questions
VB
VB
An object-oriented programming language developed by Microsoft that is implemented on the .NET Framework. Previously known as Visual Basic .NET.
2,669 questions
asked 2024-07-19T17:11:47.1433333+00:00
StewartBW 925 Reputation points
accepted 2024-07-20T00:23:17.6+00:00
StewartBW 925 Reputation points
1 answer One of the answers was accepted by the question author.

Exporting and Importing PowerApp Forms for SharePoint Lists Using C# .NET Core

Hi Team, I have a custom PowerApp form for one SharePoint site list. I need to create a new PowerApp form similar to the previous one for a new site list. How can I export the previous list PowerApp and import it to the new list using a C# .NET Core…

.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,651 questions
SharePoint
SharePoint
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
10,301 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.
10,656 questions
asked 2024-07-12T06:55:39.31+00:00
ArunKumar Arumugam 40 Reputation points
accepted 2024-07-19T08:42:09.78+00:00
ArunKumar Arumugam 40 Reputation points
2 answers

How to resolve strange problem with DialogBox containing PictureBox?

I have a Windows Forms application with a number of dialog boxes that are opened when clicking on a menu item. I recently added a new DialogBox called Sierpinski whose OnClick event handler is as follows: // Event handler for selecting the…

Windows
Windows
A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.
5,102 questions
.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,651 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.
10,656 questions
asked 2024-07-17T15:15:34.2766667+00:00
Nicholas Piazza 536 Reputation points
commented 2024-07-19T03:32:03.99+00:00
Jiale Xue - MSFT 43,046 Reputation points Microsoft Vendor
1 answer

What Does ProvisioningTransportHandler Do

When using the Device provisioning service with Azure a client is created with var provClient = ProvisioningDeviceClient.Create(_global_provisioning_endpoint, dpsScope, security, transportHandler); There are 3 choices for transport handler, why would I…

Azure IoT
Azure IoT
A category of Azure services for internet of things devices.
393 questions
Azure IoT SDK
Azure IoT SDK
An Azure software development kit that facilitates building applications that connect to Azure IoT services.
212 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.
10,656 questions
asked 2024-07-18T21:08:52.19+00:00
mikefinch87 105 Reputation points
answered 2024-07-18T21:08:52.2266667+00:00
Q&A Assist
2 answers

Azure Functions - Logging not working correctly in local

I have a simple dotnet-isolated Azure function written in .Net 8 which has 1 Http trigger function. I have another custom database logger which is added to this function to enable database logging. When I am executing the function, none of the Microsoft…

Azure Functions
Azure Functions
An Azure service that provides an event-driven serverless compute platform.
4,681 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.
10,656 questions
asked 2024-04-17T14:04:02.69+00:00
Singh, Rahul 1 Reputation point
commented 2024-07-18T14:47:36.38+00:00
Greg Moyer 1 Reputation point
1 answer One of the answers was accepted by the question author.

Best Practices for Implementing Search and Other Operations in a Blazor Server App

Hi, I'm a beginner working on a Blazor Server application using Blazor 8. I have used scaffolding to generate basic CRUD operations for a model, and the auto-generated code works well for these operations. I would like to expand my application by adding…

ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,404 questions
Blazor
Blazor
A free and open-source web framework that enables developers to create web apps using C# and HTML being developed by Microsoft.
1,500 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.
10,656 questions
asked 2024-07-18T05:48:37.93+00:00
Yusuf 771 Reputation points
accepted 2024-07-18T14:16:06.81+00:00
Yusuf 771 Reputation points
6 answers

.NET 6 Core Web App Returns web page not found

I am copying over from Stack: I have searched around here and other places to figure out the issue, but I can't find a good solution. I created a new .NET Core Web App targeting .NET6. I created the project without authentication and without Docker…

ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,404 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.
10,656 questions
asked 2022-03-13T22:33:29.183+00:00
Jacaru Tech 31 Reputation points
commented 2024-07-18T10:56:09.1933333+00:00
Ben Painter 0 Reputation points
1 answer

How to get a particular column from table and display in in label and not in the list in sqlite database in mvvm model

In MVVM model using async connection, I want to retrieve just one column from my async table to a label not to list. all sample I am seeing put all column in the list . I want only one mesa1 column to be displayed in a label.text. public async Task

SQL Server
SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
13,366 questions
.NET MAUI
.NET MAUI
A Microsoft open-source framework for building native device applications spanning mobile, tablet, and desktop.
3,232 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.
10,656 questions
Microsoft Q&A
Microsoft Q&A
Use this tag to share suggestions, feature requests, and bugs with the Microsoft Q&A team. The Microsoft Q&A team will evaluate your feedback on a regular basis and provide updates along the way.
704 questions
asked 2024-06-08T10:40:43.1+00:00
Gbenga Banuso Odumosu 40 Reputation points
edited the question 2024-07-18T10:04:50.2533333+00:00
Rakesh Gurram 5,485 Reputation points Microsoft Vendor
1 answer One of the answers was accepted by the question author.

adding model based controller gives me an error in MVC 5

I am trying to add model based controller, according to a tutorial: https://learn.microsoft.com/en-us/aspnet/mvc/overview/getting-started/introduction/accessing-your-models-data-from-a-controller I tried reinstalling Visual studio, tried deleting…

ASP.NET
ASP.NET
A set of technologies in the .NET Framework for building web applications and XML web services.
3,419 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.
10,656 questions
asked 2024-06-10T10:18:57.1966667+00:00
David Kamushadze 20 Reputation points
edited the question 2024-07-18T10:03:18.6833333+00:00
Rakesh Gurram 5,485 Reputation points Microsoft Vendor
2 answers

I am using the MVVM pattern and I want to get the value of the property in the OnPropertyChanged event

I want to get the value of the property in the OnPropertyChanged event. I would rather not use reflection.

.NET MAUI
.NET MAUI
A Microsoft open-source framework for building native device applications spanning mobile, tablet, and desktop.
3,232 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.
10,656 questions
asked 2024-07-10T16:20:54.3866667+00:00
Tom Meier 220 Reputation points
commented 2024-07-18T07:10:19.25+00:00
juliawhites 0 Reputation points
1 answer One of the answers was accepted by the question author.

How to fix an exception: Could not load file or assembly 'Microsoft.DirectX.AudioVideoPlayback, Version =1.0.2902.0....'

I was writing a C# WinForm which can play videos. I'd add the reference, 'Microsoft.DirectX.AudioVideoPlayback.dll' and compile was ok, but it failed when running with the mentioned exception. I'd searched the question through internet and I found that…

.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,651 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.
10,656 questions
asked 2024-07-17T02:53:02.9166667+00:00
Zhe-Yu Lee 20 Reputation points
commented 2024-07-18T05:50:47.9166667+00:00
Zhe-Yu Lee 20 Reputation points
0 answers

How to troubleshoot the exception, Could not create TLS secure channel?

Hello there, I have this C# code that consumes a SOAP WS and it was working properly for years. However, since recently it started to throw the following exception: The request was aborted: Could not create SSL/TLS secure channel. Basically it imports…

ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,404 questions
ASP.NET
ASP.NET
A set of technologies in the .NET Framework for building web applications and XML web services.
3,419 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.
10,656 questions
ASP.NET API
ASP.NET API
ASP.NET: A set of technologies in the .NET Framework for building web applications and XML web services.API: A software intermediary that allows two applications to interact with each other.
319 questions
asked 2024-07-12T14:24:34.8133333+00:00
Kuler Master 266 Reputation points
commented 2024-07-18T04:57:23.8966667+00:00
Tiny Wang-MSFT 2,321 Reputation points Microsoft Vendor
1 answer

Why is the blazor css isolation not working?

I have an AppLogin.razor component and its css file is AppLogin.razor.css. They are working fine. I have a UserLogin.razor component and its css file is UserLogin.razor.css. The working mechanism is as follows When you login from the AppLogin.razor…

.NET
.NET
Microsoft Technologies based on the .NET software framework.
3,651 questions
ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,404 questions
Blazor
Blazor
A free and open-source web framework that enables developers to create web apps using C# and HTML being developed by Microsoft.
1,500 questions
ASP.NET
ASP.NET
A set of technologies in the .NET Framework for building web applications and XML web services.
3,419 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.
10,656 questions
asked 2024-02-25T21:05:38.5766667+00:00
Haneen Al-fakhry 5 Reputation points
commented 2024-07-18T04:27:09.24+00:00
Akkarapol Utbuawong 0 Reputation points
2 answers

How to read pdf,jpeg,gif document using tesseract OCR with C# asp.net MVC

Currently we have one page and this page contains one file-upload and one submit button, then the user will select a file from file-upload and submit the pdf,jpeg,gif file. Now my requirement is the user will upload pdf,jpeg,gif read the content of the…

ASP.NET
ASP.NET
A set of technologies in the .NET Framework for building web applications and XML web services.
3,419 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.
13,366 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.
10,656 questions
asked 2023-11-11T21:00:28.0866667+00:00
coder rock 296 Reputation points
commented 2024-07-18T03:35:12.0433333+00:00
winironteam 36 Reputation points
3 answers One of the answers was accepted by the question author.

This error appears to me. I use .NET 8. The project is divided into three layers. The presentation layer is a web project. The rest of the layers are class libraries. I installed the necessary libraries, all of which are version 8.

Entity Framework Core
Entity Framework Core
A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
726 questions
ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,404 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.
10,656 questions
asked 2024-07-16T20:30:25.5766667+00:00
saleh salem 20 Reputation points
commented 2024-07-17T23:07:23.29+00:00
saleh salem 20 Reputation points
2 answers One of the answers was accepted by the question author.

Number of references to class variable is incorrect

I created a class level variable in the Program.cs file and use it 27 times within that file. I can do a search for the variable name and make sure spelling isn't an issue. If I go look at the number of times the variable has a reference as stated where…

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.
10,656 questions
asked 2024-07-16T15:32:14.52+00:00
Brown, Matt 46 Reputation points
accepted 2024-07-17T22:31:10.37+00:00
Brown, Matt 46 Reputation points
6 answers

Visual Studio find text in code editor auto jumps from the current line to another one

Hello, Does someone knows how to fix an annoying behaviour in the code editor of Visual Studio.? I have a .cs file with 10 000 lines of code. I am positioned within the file to see the lines from 920 to 950 I am trying to find a specific text…

Visual Studio
Visual Studio
A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.
4,889 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.
10,656 questions
asked 2021-12-14T15:38:27.647+00:00
Liviu Ionut Olteanu 11 Reputation points
commented 2024-07-17T19:53:19.1833333+00:00
QuickBooksDev 1 Reputation point
1 answer One of the answers was accepted by the question author.

I created a SSIS package to fetch data from an API to store in the Data Warehouse. But I am getting the runtime error in my script task. I even used try/catch to figure out the error, but nothing is working.

Additionally, I am using a variable 'Token' which I declared in ReadWriteVariables. The error - at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at…

SQL Server Migration Assistant
SQL Server Migration Assistant
A Microsoft tool designed to automate database migration to SQL Server from Access, DB2, MySQL, Oracle, and SAP ASE.
517 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.
10,656 questions
asked 2024-07-13T01:33:03.4633333+00:00
Manmohit Singh 20 Reputation points
accepted 2024-07-17T19:25:59.7033333+00:00
Manmohit Singh 20 Reputation points
0 answers

How to migrate KafkaTrigger from in-process to isolated when using schema registry and AVRO

Microsoft is recommending migrating Function apps from in-process to isolated which I am doing in dotnet8. The in-process KafkaTrigger is returning KafkaEventData<byte[]>. With dotnet-isolated it uses…

Azure Functions
Azure Functions
An Azure service that provides an event-driven serverless compute platform.
4,681 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.
10,656 questions
asked 2024-07-17T16:48:17.22+00:00
Greg Moyer 1 Reputation point