.Net Core
33 results found
InvalidOperationException: Connection property has not been initialized in Asp.Net Core
I get an exception throw System.InvalidOperationException: Connection property has not been initialized in Asp.net Core when I trying to get data from the database
Clear SOLID with Decorator design pattern in C# ASP.NET Core
The decorator pattern in C# Asp.Net Core is a structural design pattern and it allows developers to dynamically add new behaviors and features to existing classes without modifying them thus respecting the open-closed principle. This pattern lets you structure your business logic into layers (wrappers) in a way that each layer adds some additional behavior or functionality to an existing object, promoting separation of concern.
Http error 502.5 - process failure in asp.net core 3.1
I got an error Http error 502.5 - process failure in asp.net core 3.1 when I running my project in local window 10
Asp.Net EF Core error : More than one DbContext was found.
More than one DbContext was found. Specify which one to use. Use the '-Context' parameter for PowerShell commands and the '--context' parameter for dotnet commands.
Asp.net core error: Unable to create an object of type 'ApplicationDBContext'.
Asp.Net core Entity framework error: Unable to create an object of type 'ApplicationDBContext'. For the different patterns supported at design time
How to include .html file into a razor file in Asp.Net core?
How to include a .html file into a razor file .cshtml in Asp.Net core 3.1? I tried to use Html.Partial() but it does not work for me.
How to pass multiple models to one view in Asp.net Core
In MVC we can not pass multiple models to a single view Asp.Net Core. But in the reality, we have many case need to do this. In this article, we will discuss some ways to help resolve this problem.
Operator '!' cannot be applied to operand of type '<null>' in Asp.Net Core
Asp.net core 3.1 throws an exception Operator '!' cannot be applied to operand of type '' when starting run project
Either the 'ViewComponentName' or 'ViewComponentType' property must be set in order to invoke a view component.
Throw an error in Asp.Net Core: Either the 'ViewComponentName' or 'ViewComponentType' property must be set in order to invoke a view component.
Asp.net Core: Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' atribute
Error CS0579 Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' attribute In asp.net core 3.1 when build project
Npgsql Error: exception while reading from stream in Asp.net Core
Npgsql.NpgsqlException (0x80004005): Exception while reading from stream ---> System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
Asp.Net Core: some services are not able to be constructed
AggregateException: Some services are not able to be constructed. Error while validating the service descriptor 'ServiceType: A Lifetime: Singleton ImplementationType: B': Cannot consume scoped service 'C' from singleton 'A'.
Asp.Net Core: The connection pool has been exhausted
Npgsql.NpgsqlException (0x80004005): The connection pool has been exhausted, either raise MaxPoolSize (currently 100) or Timeout (currently 15 seconds) in Asp.Net Core
Asp.Net Core: Received unexpected backend message DataRow. Please file a bug.
Asp.Net Core Error: Received unexpected backend message DataRow. Please file a bug. Error throws when having many visit access at the same time
PostgreSQL: A command is already in progress in Asp.Net Core
PostgreSQL: A command is already in progress in Asp.Net Core when push many user access at the same time
