ADO.NET Entity Framework and LINQ to Entities

• 'DbContextOptionsBuilder' does not contain a definition for 'UseSqlServer'
• 'Microsoft.EntityFrameworkCore.Query.Internal.AnonymousObject'
• "Could not parse the configuration file..." when adding or updating to a model in EF 6
• "Multiplicity constraint violated" when there is an entity
• "Overriding" get and set operations for entity properties
• "The specified store provider cannot be found in the configuration, or is not valid " in entity framework
• A referential integrity constraint violation occurred
• add-migration command is giving error System.IO.FileLoadException: Could not load file or assembly 'System.Runtime, Version=4.2.1.0
• Added Table Not Showing
• Adding a relationship with an entity which is in the Deleted state is not allowed.
• ADO.net Entity Data Model template is missing in vs 2019 community, need help
• ADO.NET entity framework from MS-ACCESS database
• ADO.NET Entity Framwork "The specified metadata path is not valid"
• Allow Zero Datetime - MySql
• An error occurred while executing the command definition, w/ inner exception SqlException
• An error occurred while preparing the command definition. See the inner exception for details.
• An unhandled exception of type 'System.Data.Entity.Core.EntityCommandExecutionException' occurred in mscorlib.dll
• Any() method throws an exception when we connect to MySql but it is working fine when we connect to SqlServer
• Attach an entity to the DbContext that was retrieved by AsNoTracking
• Avoiding deadlock for transaction scope
• Bindingsource sort doesn't work
• Bug in EF 4.1 DatabaseGeneratedOption.Computed?
• BuildFailedException was unhandled
• c# Datetime2 breaking sql insert "The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value"
• C# Environment.NewLine and SqL Server
• C# LINQ: How to select multiple field and return list
• C#: what is the usage of virtual keyword in Entity Framework
• Calling 'Read' when the data reader is closed
• Can Entity Framework work with Linked Server
• Can i create multiple tables using same model in EF core asp.net
• Can I do an INSERT with a SELECT equivalent in Entity Framework 4
• Can't create a complex type for my stored procedure results
• Cannot add view to Entity Data Model
• Cannot implicitly convert type 'System.Data.Entity.Core.Objects.ObjectResult<string>' to 'System.Data.Objects.ObjectResult<string>'
• Change the database after creating the .edmx file
• Child table not updated during Parent update using EF
• Clear a local collection without disposing the context
• Code First - How to make DateTime columns nullable
• CompiledQuery exception - This method supports LINQ to Entity infrastructure and is not intended to be used directly from your code
• context.SaveChanges() not persisting data in database
• Convert DateTime to string and Compare that with search text using Entity Framework 6
• Convert ObjectResult<Type> to List<Type>
• Convert String to Int in Where/OrderBy - Is it possible?
• Copy data from one database to other
• Could not determine storage version; a valid storage connection or a version hint is required.
• Count(distinct column) in LINQ
• Creating a copy of an entity object
• Data Annotation to set Default Value for an enum property
• Database First - DbModelBuilder or writing the EDMX from a DbContext not supported
• DBContext - Get entities based on a list
• DbContext.Savechanges() throwing error in entity frameworkcore1.0 with trigger
• DbUpdateConcurrencyException error when saving record in EF Core 1.1
• Decimal output parameter rounded to integer
• Delegate does not take '1' arguments
• Delete before Insert during SaveChanges ?
• Deleting a stored procedure from an EF 6.1 Database First C# solution
• Deleting and adding an entity set before save
• Difference between a join and include
• Do I need to explicitly call Dispose() on DataContext object?
• Dynamic LINQ join extehsion
• EF - Create TABLE if not exists
• EF 4.1 DbContext CommandTimeout?
• EF 4.3 migration error on Enable-Migrations
• EF 5.0 design Update issue : The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Too many parameters were provided in this RPC request. The maximum is 2100
• EF 6 - saveChanges() is saving unchanged records
• EF Bad Performance with DBContext and SaveChanges
• EF Code First - Add-Migration fails with Could not load file or assembly error.
• EF Code First - Composite Key - A LINQ says Oracle Exception ('ORA-00932')
• EF Core insert explicit value for identity column, ValueGeneratedOnAdd or UseSqlServerIdentityColumn not works
• EF Core Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths
• EF Designer Problem
• EF dll does not find connection string
• EF Dynamic column name in where clause
• EF Inserts/Updates: Ridiculously Slow
• EF Model update from SQL Server CE database
• EF raising exception: An error occurred while starting a transaction on the provider connection.
• EF, SaveChanges: How to release memory after adding object to entity?
• EF4 Mapping of CLR type to EDM type is ambiguous error.
• EF6 Code First - Wont create database due to pending changes
• EF6 DbUpdateConcurrencyException when adding item
• Entity designer not generating code (designer.cs) file
• Entity frame work BulkInsert Vs AddRange
• Entity Framework - Convert DateTime between Kinds
• Entity framework - Error when filtering a IQueryable by "Contains in list" or list is null
• Entity Framework - Invalid column name error
• Entity Framework - System.StackOverflowException
• Entity Framework , Exception thrown : "Transaction (Process ID 57) was deadlocked ... "
• Entity Framework 'Update Model From Database' not displaying new tables
• Entity framework + Unit of Work + updating child entities
• Entity Framework 6: Dynamically build search clause against DB
• Entity Framework and dynamic order by statements
• Entity Framework and SQL XML data type
• Entity framework attempts to update GENERATED ALWAYS columns
• Entity Framework Code First approach is causing issue to enable migrations
• Entity Framework Core generates incorrect SQL code which results to Cannot insert explicit value for identity column in table 'AspNetUsers' when IDENTITY_INSERT is set to OFF.
• Entity framework doens't show my stored procedure on "Update model from database"
• Entity Framework does not close connection
• Entity Framework doesn't save new record into database
• Entity Framework error during update: field is required
• Entity Framework Error:an entry with the same key already exists.
• Entity Framework how to save a List of type int to database
• Entity Framework Insert or update data if exist
• Entity FrameWork Linq left join with sub query
• Entity Framework Not include child Object
• Entity Framework Power Tools menu not visible
• Entity Framework Related Error
• Entity Framework Repository and GetAll
• Entity Framework returning old data
• Entity Framework SaveChanges not saving updated data
• Entity Framework Treats XML type in SQL Server as a string.
• Entity framework updating composite primary key
• Entity Framework with Oracle AND SQL
• Entity framework with update trigger
• Entity Framework: Opening and Closing Connections to SQL Server
• Entity Framework: How to enable paging support for repository pattern
• Entity Framework: How to perform left join with EF and LINQ among multiple tables
• Entity Framework: Unable to resolve error: Object reference not set to an instance of an object.
• Entity Framework: Why virtual keyword used to declare properties in DbContext
• EntityConnection error: The specified named connection is either not found in the configuration...
• EntityFramework 5, CodeFirst Error: Keyword not supported: 'data source'.
• EntityFramework expose foreign key error when saving association from within MVC Action Method
• EntityFramework problem with SQL TRIGGER
• EntityFrameworkCore - Update vs Add
• EntityModelCodeGenerator
• Error "A transport-level error has occurred when receiving results from the server. (provider: Session Provider, error: 19 - Physical connection is not usable)
• error 0019: The EntityContainer name must be unique. An EntityContainer with the name 'AAA' is already defined.
• error 0040: The Type Decimal is not qualified with a namespace or alias
• Error 175: The ADO.NET provider with invariant Name 'System.Data.SqlClient' is either not registered in the machine or application, config file, or could not be loaded
• Error 2010: The column specified as part of this MSL does not exist in MetadataWorkspace.
• Error 3024: Problem in Mapping Fragment starting at line 372: Must specify mapping for all key properties (OrderedTestCa
• error code 3004
• Error comes as a {“Invalid object name 'dbo.TableName'.”}
• error MSB4006: There is a circular dependency in the target dependency graph involving target GetEFProjectMetadata
• Error to deserialize The InnerException message was 'ValueType 'System.Int32' cannot be null
• Error: "A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)"
• Error: dotnet.exe : System.Data.SqlClient.SqlException (0x80131904): There is already an object named 'Company' in the database.
• Error: Unable to determine composite primary key ordering for type
• Exception Handling with Entity Framework context.SaveChanges()
• Exception: A dependent property in a ReferentialConstraint is mapped to a store-generated column.
• EXISTS keyword equivalent in EF using query builder
• Find out if "ObjectContext instance has been disposed"
• Force entity framework to load new data from database without disposing the context
• Generate an XSD file from EDMX file
• Get Generated IDs using Unit Of work and Repository Pattern.
• Get Primary Key Properties of a Entity
• Getting "The entity type Company is not part of the model for the current context." error trying to do Code First in EF
• Getting a "no connection string ... could be found in the application config file" error, but don't understand why
• Getting a "The process was terminated due to an unhandled exception" error, but only from the app
• Getting correct order of execution of insert, update and delete operations before "SaveChanges"
• Getting Insert Duplicate Key Error But Only Updating and Deleting
• Getting the error System.InvalidCastException: Unable to cast object of type 'System.Data.ProviderBase.DbConnectionClosedConnecting' to type 'System.Data.SqlClient.SqlInternalConnectionTds'. in EF Core
• Getting the IDENTITY value before SaveChanges()
• Getting the Sum of columns in Entity Framework
• group and sum from multiple tables
• Group By Date (but ignoring the time portion)
• Group by Sum in Entity Framework
• How can I convert an entity object to another one with same properties from a different model
• how can i kill all connections of users to my sql server database ?
• How can I solve table already exists error while Migrate in EntityFramework Core?
• How do I detect when entity deleted (or marked for deletion)
• How do I make a connection with "master"?
• How do I select only some columns into an entity?
• How do I simply group a DateTime by DAY????
• How do I use Automapper to MAP Navigation Properties
• How do I use this generic Get function with a predicate?
• How EF cache data
• How Entity Framework can return data table instead of List
• how to add new stored procedure to existing .edmx file
• How to bind a WPF combobox with entity framework
• How to call Dynamic Tables using Entity Framework?
• How to Cast a Numeric field to String during Linq to Entities
• How to change EDMX ConnectionString from Dev. to Prod
• How to change the db connection dynamically in Entity Framework core
• How to clear all data on a table and reset identity column ?
• How to clear the internal context cache after doing direct SQL?
• How to convert a datatable column from string to int ?
• How to delete Tables from edmx file?
• How to do a recursive query in EF ?
• How to dynamically select different column via Linq to EF
• How to exclude 2 tables out of 120 tables in EF Core DB First approach
• How to fetch master detail data using EF and LINQ
• how to filter Query by date in Dynamic LINQ
• How to get all table names of db using EF
• How to get column names of db table in using EF
• How to get list of tables and list of columns in those tables in EF
• How to get object using Max LINQ query?
• How to get Primary Key info from DbContext ?
• How to group data by year, month and date?
• How to handle connection failure with EF?
• How to identify the field on {"String or binary data would be truncated.\r\nThe statement has been terminated."} error
• How to ignore a particular field from an Entity model upon insert?
• How to ignore saving an entity set ?
• How to implement Lock in "Entity Framework"
• How to insert a row using Entity Framework?
• How to insert data into multiple tables at a time using Entity Framework
• How to insert Empty String
• How To Insert List of Record To the Database Using Linq
• How to map a tinyint column to boolean
• how to map many to many relationship with additional fields ?
• How to order by column with null values last in entity framework
• How to pass ids of multiple Checkboxes selected in an Index View to the Controller?
• How to perform Update and Delete operations with DTO
• How to prevent EF from creating an index on a foreign key
• How to programmatically create DbContext Connection string and specify providerName in it?
• how to remove limit from contain clause?
• How to remove some properties generated by EF 5.0
• How to reuse parts of a linq query
• How to sort parent by child's property
• How to update both child and parent table in single transaction using entity framework?
• How to use a conditional Include with Linq to Entities queries ?
• How to use multiple connection string in entity framework 6.0
• How would I obtain unsaved entities that have been added to a context?
• HOWTO LINQ/join multiple DataTables with multiple columns.
• Include() is ignored in a subquery
• Including EF6.Utility.CS.ttinclude in T4 Template
• Inserting Data in Two Tables in Entity Framework 6.0
• Int.Parse is not supported by LINQ to Entities
• Invalid Column Name
• Invalid Column Name 'CoilItm_Id1' Error. EF6
• Invalid object name 'dbo.EdmMetadata' and 'dbo.__MigrationHistory'
• InvalidOperationException: When called from 'VisitLambda', rewriting node of type 'ParameterExpression' must return a non-null value of the same type
• Is it possible Entity framework will support table without primary key?
• Is There a .RemoveAll equivalent in Entity Framework ?
• Is there a way to use ODBC with EF?
• Is there have a way to dynamically add Dbset when using EF CORE 2.2?
• Issue with OrderBy for Strings with Integers
• Join multiple where clauses in LINQ as OR instead of AND
• join on two tables from different DbContext and schema
• Join Select all "columns" from a "table"
• Joining Two Entity Sets from Different Contexts
• Keyword not supported : 'host' error when migration ef on POSTGRESQL
• LINQ orderby in include
• Linq Query WildCard?
• LINQ query with where condition on parent and child entity.
• LINQ to Entites 'parameterless constructor' error
• Linq to Entities - Group By and Concat String Column
• Linq to Entities - StackOverflow when looking for large amount of items
• LINQ to Entities does not recognize the method 'System.String ToShortDateString()' method, and this method cannot be translated into a store expression
• Linq to Entities select count based on join
• LINQ to Entities with string comparison?
• LINQ to Entities: "New transaction is not allowed because there are other threads running in the session."
• Linq Where based on Guid returns no result
• List to EntityCollection
• Loss of Persision between C# DateTime and SQL DateTime
• Mapping a field to an enum property
• Marking an entity as Read-Only
• Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Cannot implicitly convert type 'System.Data.Objects.ObjectQuery<byte[]>' to 'byte[]'
• Missing DbModel.Context.cs file under DbModel.Context.tt
• Model diagram is not shown
• Monitoring network traffic for SQL server
• Multiple Connection Strings on same DbContext in .Net Core
• Multiple DB Context and join across context
• Multiple EDMX in one Project
• Multiplicity constraint violated, The role X of the relationship Y has multiplicity 1 or 0..1.
• Multiplicity is not valid in Role
• Multithreading and the Entity Framework
• Need help with the "model backing the context has changed since the database was created" error
• No context type was found in the assembly
• No suitable constructor found for entity type '<Entity>'.
• NOT IN clause for Entities
• NotSupportedException: Unable to create a constant value of type... Only primitive types or enumeration types are supported in this context.
• Nullable decimal problem
• ObjectContext.SaveChanges return values?
• Only primitive types or enumeration types are supported in this context - entity framework
• OnModelCreating - no suitable method found to override
• Order of inserts
• OrderBy DESC with NULL values first
• OutofMemory Exception in Entity Framework
• Performance : EF Query vs Direct sql query
• Pessimistic concurrency in LINQ to Entity?
• Pivot table in c# entity framework
• Possible to write a Linq query that returns a boolean result?
• PredicateBuilder fails on nested predicates with LINQ to Entities
• Problem in mapping among two derived entities that have 3 fields key and 2 other entities in relationship one to many using Entity Framework version. net 3.5 or 4
• Problem in querying records with null values column(s)
• ProviderManifestToken=2012 in edmx causes metadata load errors
• Querying GUID Fields via LINQ Statements off EF Models
• Recursive .Include() for hierarchies...
• Refreshing .edmx Model did not update model classes
• Remove() From Collection Does Not Mark Object As Deleted
• Remove() with many-to-many relationship doesn't work in Entity Framework 4.1
• Removing generated classes
• Reoccurring error when trying to Generate Database from Model using Entity Framework Designer
• Returning DataSet Or DataTable From Stored Procedure using Entity Framework 4.0
• Rounding C# Decimal values to SQL Decimal (or Numeric) fields
• SaveChanges very slow
• SaveChanges() when there is nothing to save
• Schema specified is not valid
• schema specified is not valid. Errors: The mapping of CLR type to EDM type is ambiguous
• Sequence contains more than one matching element - one-to-mant with composite key
• Set Entity State to Modified for entities with different reference
• sometime child object is missing while loading the data from database using lazy loading entity framework
• Sometimes get SQL Timeout expired exception with Linq to EF and after a restart of server, it works fine.
• Sqldatareader in Enitity Framework
• System InvalidOperationException : The trasacation associated with current connection has completed but not disposed
• System.ArgumentException: 'Keyword not supported: 'sslmode'.' Error
• System.ArgumentException: Keyword not supported: 'data source'.
• System.ComponentModel.Win32Exception: The network path was not found
• System.Data.EntityException HResult=0x80131501 Error
• System.InvalidOperationException: Variable '' of type '' referenced from scope '', but it is not defined
• The 'xxx' property on 'yyy' could not be set to a 'Int32' value. You must set this property to a non-null value of type 'String'.
• The argument types 'Edm.Guid' and 'Edm.String' are incompatible for this operation exception
• The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types
• The data reader is incompatible with the specified '------'. A member of the type, '----', does not have a corresponding column in the data reader with the same name.
• The data reader returned by the store data provider does not have enough columns for the query requested.
• The incoming tabular data stream(TDS) remote procedure call (RPC) protocol stream is incorrect.Too many parameters provided in the RPC request.The maximum is 2100.
• The mapping of CLR type to EDM type is ambiguous because multiple CLR types match the EDM type 'district'
• The member with identity '' does not exist in the metadata collection.
• The Model was generated with Warnings or Error
• The nested query is not supported. Operation1='Case' Operation2='Collect'
• The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not su
• The relationship between the two objects cannot be defined because they are attached to different ObjectContext objects
• The selected stored procedure or function returns no columns
• The term 'Scaffold-DbContext' is not recognized as the name of a cmdlet, function, script file, or operable program.
• The transaction active in this session has been committed or aborted by another session.
• The type or namespace name 'Infrastructure' does not exist in the namespace 'System.Data.Entity'
• The type or namespace name 'MyDBEntities' could not be found (are you missing a using directive or an assembly reference?)
• The underlying provider failed on EnlistTransaction.
• The xxx property on 'yyy' could not be set to a 'null' value. You must set this property to a non-null value of type 'DateTime'. Error
• they are not in the same type hierarchy or do not have a valid one to one foreign key relationship with matching primary keys between them.
• Type has already been configured as an entity type. It cannot be reconfigured as a complex type.
• Unable to cast object type 'System.Data.Entity.Infrastructure.DbQuery'1... error
• Unable to cast string type to number type in Linq expression
• Unable to determine the principal end of the relationship. Multiple added entities may have the same primary key.
• Unable to execute Update-Database -Script -Source $InitialDatabase in package manager console
• Unable to generate function Import for a simple function
• Unable to update the EntitySet ... because it has a DefiningQuery and no <DeleteFunction> element exists in the
• Unexpected "Invalid column name" Exception
• Union : "No coercion operator is defined between types ..."
• Update a field value in datatable using linq
• Update Existing Entity By assinging to object not the value to object in Entity Framework
• Update Model From Database deleted all of my Models under the .tt File
• Update Model from Database not working
• Update Model From Database Problem
• Update only partial properties of an entity
• update-database not updating new columns of a created table
• Using OrderBy with DbContext Set
• Validate EDMX file from XML Editor
• Visual Studio 2019 & Data Connection & Entity Framework Wizard (Oracle)
• What is difference between ToList() & AsQueryable()
• What is SET FMTONLY OFF; And why it helped me to return set from stored procedure?
• What is the .datasource file in the DataSources folder?
• What is the advantage and disadvantage of Entity Framework
• What is the advantage of AsQueryable() when fetching data
• What is the usage of HasMany and WithMany
• What's EntityFramework.dll ?
• What's the difference between datasets and the entity framework?
• When do we use IQueryable? or IEnumerable? or ToList()?
• When to use AsEnumerable() along with EF to fetch data
• WHERE IN clause?
• Why db.SaveChanges() does not work?
• Why does Remove() not delete entities from database?
• Why doesn't cascade on delete work?
• Why LINQ to Entities does not recognize the method 'System.String PadLeft(Int32, Char)' ?
• Why my DbContext.Select() returns null when populating a different object?
• Why the word Extent1 is used in sql generated by EF
• Wildcard search using entity framework.
• XSD to edmx or Database?