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Microsoft.EntityFrameworkCore.Database.Transaction

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Microsoft.EntityFrameworkCore.Database.Transaction[20205] An error occurred using a transaction.

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InvalidOperationExecption: The property 'EntityNam

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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
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Error The instance of entity type ModalType cannot

.NET 7
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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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Entity Framework Core Error: To change the IDENTITY property of a column, the column needs to be dropped and recreated

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Entity Framework Core Error: Unable to track an en

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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

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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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How to Count the Number of records in the Database

.NET 7
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How to Count the Number of records in the Database Table using Asp.Net Core Entity Framework Core

.NET 7
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_context.ChangeTracker 'threw an exception of type

.NET 7
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_context.ChangeTracker 'threw an exception of type 'System.ObjectDisposedException'

.NET 7
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[Solved] Entity Framework Core (EF 6) Error: Unabl

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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.

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How to Select Top Distinct Values from a LINQ Grou

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

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[EF Core] How to Enable Sensitive Data Logging and

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[EF Core] How to Enable Sensitive Data Logging and Detailed Errors

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System.InvalidOperationException: The ConnectionSt

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System.InvalidOperationException: The ConnectionString property has not been initialized [EF Core 7, Asp.Net 7]

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InvalidOperationException: An error was generated

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

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Entity Framework Core 6 and 7 Tips and Tricks

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Entity Framework Core 6 and 7 Tips and Tricks

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Asp.Net Core EF Core Error: Cannot access a dispos

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Asp.Net Core EF Core Error: Cannot access a disposed object. A common cause of this error is disposing a context that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling Dispose() on the context, or wrapping the context in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances.

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EF Core 6 Error: Error Number:262,State:1,Class:14

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EF Core 6 Error: Error Number:262,State:1,Class:14 CREATE TABLE permission denied in database

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[Entity Framework Core 5] An Unhandled Exception O

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[Entity Framework Core 5] An Unhandled Exception Occurred While Processing the Request

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SqlException: Cannot insert the value NULL into co

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SqlException: Cannot insert the value NULL into column 'Id', table 'dbo.TableName'; column does not allow nulls. INSERT fails. The statement has been terminated

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Microsoft Data SqlClient SqlException (0x80131904)

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Microsoft Data SqlClient SqlException (0x80131904) New transaction is not allowed because there are other threads running in the session

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InvalidOperationException: An exception was thrown

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

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SqlNullValueException: Data is Null. This method o

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SqlNullValueException: Data is Null. This method or property cannot be called on Null values

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_context.SaveChanges is not working

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_context.SaveChanges is not working

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SqlException: Conversion failed when converting fr

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SqlException: Conversion failed when converting from a character string to uniqueidentifier

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InvalidOperation: The connection was not closed. T

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InvalidOperation: The connection was not closed. The connections current state is connecting

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The expression 'b.listOfFileRecords' is invalid in

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The expression 'b.listOfFileRecords' is invalid inside an 'Include' operation, since it does not represent a property access

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Invalid column name '*_ID'

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Invalid column name '*_ID'

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An error was generated for warning 'Microsoft.Enti

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

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InvalidOperationException, A second operation star

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

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Solved!! Column is invalid in the select list beca

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Solved!! Column is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause

ENTITY FRAMEWORK
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An Exception occurred in the database while saving

.NET 7
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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: 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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SqlExeption: Cannot insert explicit value for iden

SQL
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SqlExeption: Cannot insert explicit value for identity column in table when IDENTITY_INSERT is set to OFF

SQL
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Entity Framework Core Store Procedure with Paramet

SQL
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Entity Framework Core Store Procedure with Parameters does not return results (FromSqlRaw)

SQL
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The instance of entity type 'IdentityUserLogin<str

.NET 7
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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
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What is New in Asp Net 7 and EF Core 7 (Best Featu

RESEARCH
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What is New in Asp Net 7 and EF Core 7 (Best Features)

RESEARCH
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Entity Framework Core not adding records but overr

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Entity Framework Core not adding records but overriding the existing one

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Asp.Net Core 3.1 Entity Framework Core DateTime fi

.NET 7
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Asp.Net Core 3.1 Entity Framework Core DateTime field getting updated to 1/1/0001

.NET 7
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Cassandra Entity Framework Error "TypeLoadExceptio

QUESTIONS
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Cassandra Entity Framework Error "TypeLoadException: Method 'GenerateScript' in type"

QUESTIONS
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Weird Issues with SQL Server, Visual Studio and En

RESEARCH
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Weird Issues with SQL Server, Visual Studio and Entity-Framework

RESEARCH
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What is New in Entity Framework 5 Shipped in Asp.N

.NET 7
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What is New in Entity Framework 5 Shipped in Asp.Net 5

.NET 7
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How to Code a Windows Service that Updates the Dat

.NET 7
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How to Code a Windows Service that Updates the Database Table Nightly

.NET 7
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Performance Tuning in Entity Framework Core 5 and

.NET 7
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Performance Tuning in Entity Framework Core 5 and AspNet 5

.NET 7
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How to get the last record of Entity Framework mod

.NET 7
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How to get the last record of Entity Framework model data

.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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SqlNullValueException: Data is Null. This method o

QUESTIONS
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SqlNullValueException: Data is Null. This method or property cannot be called on Null values

QUESTIONS
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Asp.Net Core 3.1 2020 Conference Notes

EDUCATION
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Asp.Net Core 3.1 2020 Conference Notes

EDUCATION
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How Entity Framework 6 and 7 Works in Asp.Net 6 an

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How Entity Framework 6 and 7 Works in Asp.Net 6 and 7

ENTITY FRAMEWORK
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How to optimize sql query in Microsoft SQL Server

SQL
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How to optimize sql query in Microsoft SQL Server

SQL
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Entity framework "InvalidCastException: Unable to

.NET 7
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Entity framework "InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.Decimal."

.NET 7
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Entity Framework

Microsoft.EntityFrameworkCore.Database.Transaction

Microsoft.EntityFrameworkCore.Database.Transaction[20205] An error occurred using a transaction.

InvalidOperationExecption: The property 'EntityNam

InvalidOperationExecption: The property 'EntityName.Id' is part of a key and so cannot be modified or marked as modified.

Error The instance of entity type ModalType cannot

Error The instance of entity type ModalType cannot be tracked because another instance with the key value {id: 7656544} is already being tracked.

What is Entity Framework Navigation in Asp.Net 6

What is Entity Framework Navigation in Asp.Net 6

Entity Framework Core Error: To change the IDENTIT

Entity Framework Core Error: To change the IDENTITY property of a column, the column needs to be dropped and recreated

Entity Framework Core Error: Unable to track an en

Entity Framework Core Error: Unable to track an entity of type "Model Class Object" because primary key property 'id' is null

[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()'.

How to Count the Number of records in the Database

How to Count the Number of records in the Database Table using Asp.Net Core Entity Framework Core

_context.ChangeTracker 'threw an exception of type

_context.ChangeTracker 'threw an exception of type 'System.ObjectDisposedException'

[Solved] Entity Framework Core (EF 6) Error: Unabl

[Solved] Entity Framework Core (EF 6) Error: Unable to track an entity of type 'YourModalName' because primary key property 'id' is null.

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

[EF Core] How to Enable Sensitive Data Logging and

[EF Core] How to Enable Sensitive Data Logging and Detailed Errors

System.InvalidOperationException: The ConnectionSt

System.InvalidOperationException: The ConnectionString property has not been initialized [EF Core 7, Asp.Net 7]

InvalidOperationException: An error was generated

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

Entity Framework Core 6 and 7 Tips and Tricks

Entity Framework Core 6 and 7 Tips and Tricks

Asp.Net Core EF Core Error: Cannot access a dispos

EF Core 6 Error: Error Number:262,State:1,Class:14

EF Core 6 Error: Error Number:262,State:1,Class:14 CREATE TABLE permission denied in database

[Entity Framework Core 5] An Unhandled Exception O

[Entity Framework Core 5] An Unhandled Exception Occurred While Processing the Request

SqlException: Cannot insert the value NULL into co

SqlException: Cannot insert the value NULL into column 'Id', table 'dbo.TableName'; column does not allow nulls. INSERT fails. The statement has been terminated

Microsoft Data SqlClient SqlException (0x80131904)

Microsoft Data SqlClient SqlException (0x80131904) New transaction is not allowed because there are other threads running in the session

InvalidOperationException: An exception was thrown

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

SqlNullValueException: Data is Null. This method o

SqlNullValueException: Data is Null. This method or property cannot be called on Null values

_context.SaveChanges is not working

_context.SaveChanges is not working

SqlException: Conversion failed when converting fr

SqlException: Conversion failed when converting from a character string to uniqueidentifier

InvalidOperation: The connection was not closed. T

InvalidOperation: The connection was not closed. The connections current state is connecting

The expression 'b.listOfFileRecords' is invalid in

The expression 'b.listOfFileRecords' is invalid inside an 'Include' operation, since it does not represent a property access

Invalid column name '*_ID'

Invalid column name '*_ID'

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, A second operation star

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

Solved!! Column is invalid in the select list beca

Solved!! Column is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause

An Exception occurred in the database while saving

An Exception occurred in the database while saving changes for context type 'ContextType' Microsoft.Data.SqlClient.SqlException (0x80131904)

InvalidOperationException: The supplied IQueryable

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

SqlExeption: Cannot insert explicit value for iden

SqlExeption: Cannot insert explicit value for identity column in table when IDENTITY_INSERT is set to OFF

Entity Framework Core Store Procedure with Paramet

Entity Framework Core Store Procedure with Parameters does not return results (FromSqlRaw)

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

What is New in Asp Net 7 and EF Core 7 (Best Featu

What is New in Asp Net 7 and EF Core 7 (Best Features)

Entity Framework Core not adding records but overr

Entity Framework Core not adding records but overriding the existing one

Asp.Net Core 3.1 Entity Framework Core DateTime fi

Asp.Net Core 3.1 Entity Framework Core DateTime field getting updated to 1/1/0001

Cassandra Entity Framework Error "TypeLoadExceptio

Cassandra Entity Framework Error "TypeLoadException: Method 'GenerateScript' in type"

Weird Issues with SQL Server, Visual Studio and En

Weird Issues with SQL Server, Visual Studio and Entity-Framework