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[Solved] System.InvalidOperationException: 'Unable
QUESTIONS
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Views 578
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[Solved] System.InvalidOperationException: 'Unable to track an entity of type 'EntityName' because its primary key property 'Id' is null
QUESTIONS
Likes: 82
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[Solved] Entity Framework Core (EF 6) Error: Unabl
ENTITY FRAMEWORK
Likes 91
Views 593
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[Solved] Entity Framework Core (EF 6) Error: Unable to track an entity of type 'YourModalName' because primary key property 'id' is null.
ENTITY FRAMEWORK
Likes: 91
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Entity Framework Core Error: Unable to track an en
ENTITY FRAMEWORK
Likes 96
Views 976
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Entity Framework Core Error: Unable to track an entity of type "Model Class Object" because primary key property 'id' is null
ENTITY FRAMEWORK
Likes: 96
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Entity framework "InvalidCastException: Unable to
.NET 7
Likes 69
Views 171
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Entity framework "InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.Decimal."
.NET 7
Likes: 69
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Error The instance of entity type ModalType cannot
.NET 7
Likes 66
Views 372
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Error The instance of entity type ModalType cannot be tracked because another instance with the key value {id: 7656544} is already being tracked.
.NET 7
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Asp.Net Core 3.1 Entity Framework Core DateTime fi
.NET 7
Likes 74
Views 233
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Asp.Net Core 3.1 Entity Framework Core DateTime field getting updated to 1/1/0001
.NET 7
Likes: 74
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[SOLVED!! Entity Framework Error Asp.Net Core 3.1]
.NET 7
Likes 124
Views 3381
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[SOLVED!! Entity Framework Error Asp.Net Core 3.1] InvalidCastException: Unable to cast object of type 'Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`
.NET 7
Likes: 124
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InvalidOperationException: The 'Microsoft.AspNetCo
.NET 7
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Views 0
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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
Likes: 22
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An Exception occurred in the database while saving
.NET 7
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Views 0
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An Exception occurred in the database while saving changes for context type 'ContextType' Microsoft.Data.SqlClient.SqlException (0x80131904)
.NET 7
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InvalidOperationException: An error was generated
.NET 7
Likes 58
Views 35
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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
Likes: 58
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InvalidOperationException: An error was generated
ENTITY FRAMEWORK
Likes 30
Views 0
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InvalidOperationException: An error was generated for warning 'Microsoft.EntityFrameworkCore.Query.InvalidIncludePathError
ENTITY FRAMEWORK
Likes: 30
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System.InvalidCastException: Unable to cast object
QUESTIONS
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Views 237
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System.InvalidCastException: Unable to cast object of type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.ITransformer]' to type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.Data.RegressionPredictionTransformer`1[Microsoft.ML.Trainers.LinearRegressionModelParameters]]'.
QUESTIONS
Likes: 60
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_context.SaveChanges is not working
ENTITY FRAMEWORK
Likes 60
Views 0
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_context.SaveChanges is not working
ENTITY FRAMEWORK
Likes: 60
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Sql Server Error: Unable to modify table. The co
SQL
Likes 127
Views 363
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Sql Server Error: Unable to modify table. The conversion of a date data type to a datetime data type resulted in an out-of-range value. The statement has been terminated
SQL
Likes: 127
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_context.ChangeTracker 'threw an exception of type
.NET 7
Likes 70
Views 300
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_context.ChangeTracker 'threw an exception of type 'System.ObjectDisposedException'
.NET 7
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[Solved] cannot apply indexing with [] to an expre
TECHNOLOGY
Likes 106
Views 1253
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[Solved] cannot apply indexing with [] to an expression of type QueryString
TECHNOLOGY
Likes: 106
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Retraining Machine Learning Model in Microsoft Mac
MACHINE LEARNING
Likes 81
Views 563
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Retraining Machine Learning Model in Microsoft Machine Learning (ML.Net) Error
MACHINE LEARNING
Likes: 81
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[Solved] InvalidOperationException: The entity typ
MVC
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Views 1509
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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
Likes: 91
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[Solved] Entity Framework Core Asp.Net Core 3.1 Er
SQL
Likes 93
Views 1114
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[Solved] Entity Framework Core Asp.Net Core 3.1 Error: SqlException: The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value. The statement has been terminated
SQL
Likes: 93
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The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastr
.NET 7
Likes 59
Views 0
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The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Decimal'
.NET 7
Likes: 59
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Unable to start Kestrel. System.InvalidOpera
.NET 7
Likes 31
Views 250
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Unable to start Kestrel. System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date
.NET 7
Likes: 31
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The instance of entity type 'IdentityUserLogin<str
.NET 7
Likes 68
Views 455
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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
.NET 7
Likes: 68
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InvalidOperationException: The 'Microsoft.AspNetCo
QUESTIONS
Likes 64
Views 495
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InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1
QUESTIONS
Likes: 64
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Performance Tuning in Entity Framework Core 5 and
.NET 7
Likes 87
Views 333
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Performance Tuning in Entity Framework Core 5 and AspNet 5
.NET 7
Likes: 87
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InvalidOperationException: Unable to resolve servi
QUESTIONS
Likes 73
Views 103
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InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Mvc.IUrlHelper' while attempting to activate
QUESTIONS
Likes: 73
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InvalidOperationException: Unable to resolve servi
.NET 7
Likes 92
Views 430
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InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHeaderDictionary' while attempting to activate
.NET 7
Likes: 92
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We're unable to complete your request invalid_requ
SQL
Likes 150
Views 4131
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We're unable to complete your request invalid_request: The provided value for the input parameter 'redirect_uri' is not valid. The expected value is a URI which matches a redirect URI registered for this client application.
SQL
Likes: 150
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The instance of entity type 'IdentityUserLogin<str
TECHNOLOGY
Likes 113
Views 1109
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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
Likes: 113
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InvalidOperationException: Unable to resolve servi
.NET 7
Likes 74
Views 217
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InvalidOperationException: Unable to resolve service for type 'System.IFormatProvider' while attempting to activate 'RepositoryService'.
.NET 7
Likes: 74
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What is New in Asp Net 7 and EF Core 7 (Best Featu
RESEARCH
Likes 19
Views 0
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What is New in Asp Net 7 and EF Core 7 (Best Features)
RESEARCH
Likes: 19
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InvalidOperationExecption: The property 'EntityNam
ENTITY FRAMEWORK
Likes 73
Views 113
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InvalidOperationExecption: The property 'EntityName.Id' is part of a key and so cannot be modified or marked as modified.
ENTITY FRAMEWORK
Likes: 73
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Asp.Net Core 3.1 Dependency Injection Error Unable
.NET 7
Likes 114
Views 2513
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Asp.Net Core 3.1 Dependency Injection Error Unable to resolve service for type 'Microsoft.AspNetCore.Http.HttpContext
.NET 7
Likes: 114
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Can't bind the IDataView column ColumnName of type
DATABASES
Likes 97
Views 1462
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Can't bind the IDataView column ColumnName of type VectorSingle, 2 to field or property AnotherColumnName of type System.Single
DATABASES
Likes: 97
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Cannot create a DbSet for "MyModal" because this t
.NET 7
Likes 31
Views 0
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Cannot create a DbSet for "MyModal" because this type is not included in the model for the context. However the model contains an entity type with the same name in a different namespace
.NET 7
Likes: 31
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NullReferenceException: Object reference not set t
TECHNOLOGY
Likes 111
Views 298
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NullReferenceException: Object reference not set to an instance of an object
TECHNOLOGY
Likes: 111
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SiteKiosk Object Reference not set to an instance
TECHNOLOGY
Likes 93
Views 327
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SiteKiosk Object Reference not set to an instance of an object
TECHNOLOGY
Likes: 93
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InvalidOperationException: An exception was thrown
ENTITY FRAMEWORK
Likes 69
Views 0
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InvalidOperationException: An exception was thrown while attempting to evaluate the LINQ query parameter expression
ENTITY FRAMEWORK
Likes: 69
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How to get the last record of Entity Framework mod
.NET 7
Likes 61
Views 10
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How to get the last record of Entity Framework model data
.NET 7
Likes: 61
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AspNet MVC ViewData Error: InvalidOperationExcepti
QUESTIONS
Likes 67
Views 192
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AspNet MVC ViewData Error: InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has key 'Type'
QUESTIONS
Likes: 67
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Cassandra Entity Framework Error "TypeLoadExceptio
QUESTIONS
Likes 55
Views 0
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Cassandra Entity Framework Error "TypeLoadException: Method 'GenerateScript' in type"
QUESTIONS
Likes: 55
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What is domain driven design in Asp.Net 8?
RESEARCH
Likes 29
Views 0
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What is domain driven design in Asp.Net 8?
RESEARCH
Likes: 29
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Microsoft.EntityFrameworkCore.Database.Transaction
ENTITY FRAMEWORK
Likes 114
Views 2822
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Microsoft.EntityFrameworkCore.Database.Transaction[20205] An error occurred using a transaction.
ENTITY FRAMEWORK
Likes: 114
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History of Candles
CANDLES
Likes 30
Views 0
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History of Candles
CANDLES
Likes: 30
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How to maintain Health Habits in 2024
RESEARCH
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Views 0
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How to maintain Health Habits in 2024
RESEARCH
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Asp.Net Core Error: InvalidOperationException: The
.NET 7
Likes 96
Views 341
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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
Likes: 96
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SqlNullValueException: Data is Null. This method o
ENTITY FRAMEWORK
Likes 42
Views 18
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SqlNullValueException: Data is Null. This method or property cannot be called on Null values
ENTITY FRAMEWORK
Likes: 42
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Asp.Net MVC Development Notes
.NET 7
Likes 79
Views 752
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Asp.Net MVC Development Notes
.NET 7
Likes: 79
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Cannot ping computer on same network
SERVERS
Likes 26
Views 0
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Cannot ping computer on same network
SERVERS
Likes: 26
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Graphs Data Structure
COMPUTER PROGRAMMING
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Views 0
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Graphs Data Structure
COMPUTER PROGRAMMING
Likes: 23
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SqlException: Conversion failed when converting fr
ENTITY FRAMEWORK
Likes 48
Views 0
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SqlException: Conversion failed when converting from a character string to uniqueidentifier
ENTITY FRAMEWORK
Likes: 48
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