Solved Solutions to computer programming Errors

InvalidOperationException: Unable to resolve servi

QUESTIONS
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InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Mvc.IUrlHelper' while attempting to activate

QUESTIONS
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InvalidOperationException: The current thread is n

QUESTIONS
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InvalidOperationException: The current thread is not associated with the Dispatcher. Use InvokeAsync() to switch execution to the Dispatcher when triggering rendering or component state.

QUESTIONS
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InvalidOperationException: There is no ViewData it

.NET 7
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InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'Department'

.NET 7
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AspNet MVC ViewData Error: InvalidOperationExcepti

QUESTIONS
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AspNet MVC ViewData Error: InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has key 'Type'

QUESTIONS
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InvalidOperationException: The property 'EntityNam

QUESTIONS
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InvalidOperationException: The property 'EntityName' has a temporary value while attempting to change the entity's state

QUESTIONS
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InvalidOperationException: The relative page path

QUESTIONS
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InvalidOperationException: The relative page path 'Test' can only be used while executing a Razor Page. Specify a root relative path with a leading '/' to generate a URL outside of a Razor Page. If you are using LinkGenerator then you must provide the current HttpContext to use relative pages.

QUESTIONS
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InvalidOperationException: The supplied IQueryable

.NET 7
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InvalidOperationException: The supplied IQueryable is provided by Entity Framework. To query it efficiently, you must reference the package

.NET 7
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An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError': Unable to find navigation specified in string based include path

ENTITY FRAMEWORK
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InvalidOperationException: The 'Microsoft.AspNetCo

.NET 7
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InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

.NET 7
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InvalidOperationException: Unable to resolve servi

.NET 7
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InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHeaderDictionary' while attempting to activate

.NET 7
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Asp.Net Core Error: InvalidOperationException: The

.NET 7
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Asp.Net Core Error: InvalidOperationException: The database generated a null value for non-nullable property 'PropertyName' of entity type 'EntityName'. Ensure value generation configuration in the database matches the configuration in the model

.NET 7
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InvalidOperationException: Cannot override the 'hr

MVC
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InvalidOperationException: Cannot override the 'href' attribute for <a>. An <a> with a specified 'href' must not have attributes starting with 'asp-route-' or an 'asp-action', 'asp-controller', 'asp-area', 'asp-route', 'asp-protocol', 'asp-host', 'asp-fragment', 'asp-page' or 'asp-page-handler' attribute.

MVC
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InvalidOperationException: The 'Microsoft.AspNetCo

QUESTIONS
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InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

QUESTIONS
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InvalidOperationException: The required column 'Ca

ENTITY FRAMEWORK
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InvalidOperationException: The required column 'Categoryid' was not present in the results of a 'FromSql' operation

ENTITY FRAMEWORK
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InvalidOperationException: Unable to resolve servi

.NET 7
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InvalidOperationException: Unable to resolve service for type 'System.IFormatProvider' while attempting to activate 'RepositoryService'.

.NET 7
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InvalidOperationException: An error was generated

.NET 7
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InvalidOperationException: An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError': Unable to find navigation 'EntityName' specified in string based include path 'AnotherEntity Name'.

.NET 7
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An Exception was thrown while attempting to evalua

.NET 7
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An Exception was thrown while attempting to evaluate the LINQ query parameter expression

.NET 7
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[Solved] InvalidOperationException: The entity typ

MVC
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[Solved] InvalidOperationException: The entity type 'TableNameOrModelName' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'.

MVC
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RuntimeBinderException: The best overloaded method

.NET 7
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RuntimeBinderException: The best overloaded method match for 'Microsoft.AspNetCore.DataProtection.IDataProtector.Protect(byte[])' has some invalid arguments

.NET 7
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InvalidOperationException: <ClassName xmlns='http:

.NET 7
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InvalidOperationException: <ClassName xmlns='http://tempuri.org/'/> was not expected

.NET 7
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InvalidOperationException: An error was generated

ENTITY FRAMEWORK
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InvalidOperationException: An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError

ENTITY FRAMEWORK
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The instance of entity type 'IdentityUserLogin<str

TECHNOLOGY
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The instance of entity type 'IdentityUserLogin<string>' cannot be tracked because another instance with the same key value for {'LoginProvider', 'ProviderKey'} is already being tracked

TECHNOLOGY
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[AspNet 5 Entity Framework 6 Error] InvalidOperati

.NET 7
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[AspNet 5 Entity Framework 6 Error] InvalidOperationException: The property "ModelName.Id" has a temporary value while attempting to change the entity's state to "Modified". Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property.

.NET 7
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InvalidOperationException: The model item passed i

DATABASES
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InvalidOperationException: The model item passed into the ViewDataDictionary is of type 'System.Collections.Generic.List`1', but this ViewDataDictionary instance requires a model item of type 'Another Model'.

DATABASES
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Cannot consume scoped service Microsoft.AspNetCore

.NET 7
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Cannot consume scoped service Microsoft.AspNetCore.Identity.IRoleStore from singleton 'Microsoft.AspNetCore.Identity.RoleManager

.NET 7
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InvalidOperationException: A view component named

.NET 7
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InvalidOperationException: A view component named 'NameHere' could not be found. A view component must be a public non-abstract class, not contain any generic parameters, and either be decorated with 'ViewComponentAttribute' or have a class name ending with the 'ViewComponent' suffix. A view component must not be decorated with 'NonViewComponentAttribute'

.NET 7
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Asp.Net Core Error: InvalidOperationException: The

.NET 7
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Asp.Net Core Error: InvalidOperationException: The model item passed into the ViewDataDictionary is of type '<>f__AnonymousType7`2[System.Int32,System.String]', but this ViewDataDictionary instance requires a model item of type 'Modal'.

.NET 7
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InvalidOperationException: No service for type Mic

.NET 7
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InvalidOperationException: No service for type Microsoft AspNetCore Identity UserManager 1[Microsoft AspNetCore identity IdentityUser] has been registered

.NET 7
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How to Sign Out a User when Session Expires in Asp

.NET 7
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How to Sign Out a User when Session Expires in AspNetCore

.NET 7
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InvalidOperationException, A second operation star

ENTITY FRAMEWORK
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InvalidOperationException, A second operation started on this context before a previous operation completed.

ENTITY FRAMEWORK
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InvalidOperationException: An exception was thrown

ENTITY FRAMEWORK
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InvalidOperationException: An exception was thrown while attempting to evaluate the LINQ query parameter expression

ENTITY FRAMEWORK
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XmlException: The ':' character, hexadecimal value

XML
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XmlException: The ':' character, hexadecimal value 0x3A, cannot be included in a name

XML
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How to Select Top Distinct Values from a LINQ Grou

ENTITY FRAMEWORK
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How to Select Top Distinct Values from a LINQ Group by Results using Entity Framework Core

ENTITY FRAMEWORK
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How to get a User ID in Asp.Net Core 3.1 (ClaimPri

.NET 7
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How to get a User ID in Asp.Net Core 3.1 (ClaimPrincipal) in a Service Repository

.NET 7
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InvalidOperationException

InvalidOperationException: Unable to resolve servi

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Mvc.IUrlHelper' while attempting to activate

InvalidOperationException: The current thread is n

InvalidOperationException: The current thread is not associated with the Dispatcher. Use InvokeAsync() to switch execution to the Dispatcher when triggering rendering or component state.

InvalidOperationException: There is no ViewData it

InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'Department'

AspNet MVC ViewData Error: InvalidOperationExcepti

AspNet MVC ViewData Error: InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has key 'Type'

InvalidOperationException: The property 'EntityNam

InvalidOperationException: The property 'EntityName' has a temporary value while attempting to change the entity's state

InvalidOperationException: The relative page path

InvalidOperationException: The relative page path 'Test' can only be used while executing a Razor Page. Specify a root relative path with a leading '/' to generate a URL outside of a Razor Page. If you are using LinkGenerator then you must provide the current HttpContext to use relative pages.

InvalidOperationException: The supplied IQueryable

InvalidOperationException: The supplied IQueryable is provided by Entity Framework. To query it efficiently, you must reference the package

InvalidOperationException: Incorrect Content-Type

InvalidOperationException: Incorrect Content-Type

An error was generated for warning 'Microsoft.Enti

An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError': Unable to find navigation specified in string based include path

InvalidOperationException: The 'Microsoft.AspNetCo

InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

InvalidOperationException: Unable to resolve servi

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHeaderDictionary' while attempting to activate

Asp.Net Core Error: InvalidOperationException: The

Asp.Net Core Error: InvalidOperationException: The database generated a null value for non-nullable property 'PropertyName' of entity type 'EntityName'. Ensure value generation configuration in the database matches the configuration in the model

InvalidOperationException: Cannot override the 'hr

InvalidOperationException: The 'Microsoft.AspNetCo

InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

InvalidOperationException: The required column 'Ca

InvalidOperationException: The required column 'Categoryid' was not present in the results of a 'FromSql' operation

InvalidOperationException: Unable to resolve servi

InvalidOperationException: Unable to resolve service for type 'System.IFormatProvider' while attempting to activate 'RepositoryService'.

InvalidOperationException: An error was generated

InvalidOperationException: An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError': Unable to find navigation 'EntityName' specified in string based include path 'AnotherEntity Name'.

An Exception was thrown while attempting to evalua

An Exception was thrown while attempting to evaluate the LINQ query parameter expression

[Solved] InvalidOperationException: The entity typ

[Solved] InvalidOperationException: The entity type 'TableNameOrModelName' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'.

RuntimeBinderException: The best overloaded method

RuntimeBinderException: The best overloaded method match for 'Microsoft.AspNetCore.DataProtection.IDataProtector.Protect(byte[])' has some invalid arguments

InvalidOperationException: <ClassName xmlns='http:

InvalidOperationException: <ClassName xmlns='http://tempuri.org/'/> was not expected

InvalidOperationException: An error was generated

InvalidOperationException: An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError

The instance of entity type 'IdentityUserLogin<str

The instance of entity type 'IdentityUserLogin<string>' cannot be tracked because another instance with the same key value for {'LoginProvider', 'ProviderKey'} is already being tracked

[AspNet 5 Entity Framework 6 Error] InvalidOperati

[AspNet 5 Entity Framework 6 Error] InvalidOperationException: The property "ModelName.Id" has a temporary value while attempting to change the entity's state to "Modified". Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property.

InvalidOperationException: The model item passed i

InvalidOperationException: The model item passed into the ViewDataDictionary is of type 'System.Collections.Generic.List`1', but this ViewDataDictionary instance requires a model item of type 'Another Model'.

Cannot consume scoped service Microsoft.AspNetCore

Cannot consume scoped service Microsoft.AspNetCore.Identity.IRoleStore from singleton 'Microsoft.AspNetCore.Identity.RoleManager

InvalidOperationException: A view component named

Asp.Net Core Error: InvalidOperationException: The

Asp.Net Core Error: InvalidOperationException: The model item passed into the ViewDataDictionary is of type '<>f__AnonymousType7`2[System.Int32,System.String]', but this ViewDataDictionary instance requires a model item of type 'Modal'.

InvalidOperationException: No service for type Mic

InvalidOperationException: No service for type Microsoft AspNetCore Identity UserManager 1[Microsoft AspNetCore identity IdentityUser] has been registered

How to Sign Out a User when Session Expires in Asp

How to Sign Out a User when Session Expires in AspNetCore

InvalidOperationException, A second operation star

InvalidOperationException, A second operation started on this context before a previous operation completed.

InvalidOperationException: An exception was thrown

InvalidOperationException: An exception was thrown while attempting to evaluate the LINQ query parameter expression

XmlException: The ':' character, hexadecimal value

XmlException: The ':' character, hexadecimal value 0x3A, cannot be included in a name

How to Select Top Distinct Values from a LINQ Grou

How to Select Top Distinct Values from a LINQ Group by Results using Entity Framework Core

How to get a User ID in Asp.Net Core 3.1 (ClaimPri

How to get a User ID in Asp.Net Core 3.1 (ClaimPrincipal) in a Service Repository