score:0
before saving your changes, are you making sure that all not-null properties have a value?
in my case i had to add a hidden value in the view, so the primary key would be posted back to the server.
@html.hiddenfor(model => model.id)
score:0
for me, the problem was unique index on some of the columns in my database. violating the index was causing this error to be displayed.
but when i was searching for the solution i found there can be other reasons for this error also , like make sure key have values and are not null , check concurrence setting for the column .
Source: stackoverflow.com
Related Query
- Update Database using Entity Framework having primary key on multiple Columns
- map one to one with multiple primary key columns entity framework code first
- Multiple records using Find method in Entity Framework by passing list of primary keys
- Entity Framework Ignore Duplicate Primary Key Values while inserting Multiple Rows at once
- How to filter entity framework result with multiple columns using a lambda expression
- Searching for multiple strings using single database query with entity framework and LINQ
- How to Lazy Load child object with string primary key in Entity Framework Code First?
- How to select a query with multiple columns and put it into variables using Entity Framework and ASP.NET?
- entity framework update multiple records using join
- Join to return multiple columns and using group by Entity Framework
- how to update value by 1 if username already exist in database using Linq and entity framework
- How to Update multiple tables with foreign keys using LINQ expression ASP.NET MVC Entity Framework
- Distinct on Multiple Columns Entity Framework LINQ
- EF - Update multiple rows in database without using foreach loop
- Get All Except from SQL database using Entity Framework
- Deleting multiple records with Entity Framework using a single LINQ query
- How to delete multiple records in entity framework without looping using LINQ?
- Joining multiple tables using Entity Framework
- Should we always use .Find() rather than .FirstOrDefault() when we have the primary key in Entity Framework Core?
- Giving Multiple List<int> type criteria by using linq in Entity Framework
- Efficiently check if record exists in database using Entity framework LINQ
- Query Xml from SQL using Entity Framework Database First
- MVC finding row in database not using primary key
- How to get Multiple Result Set in Entity Framework using Linq with C#?
- How to force Entity Framework 4.0 to generate parameters of equivalent size to their corresponding database columns
- Entity Framework Code First using context in Controller
- Join multiple tables and single output using Entity Framework mvc5
- Does Entity Framework query the database multiple times if I use different fields of the same Linq query at different times?
- Update query in LINQ contains all columns in WHERE clause instead of just the primary key column
- Search From database and sort using Entity Framework
More Query from same tag
- Linq - Group by and apply a distinct to a single field
- NHibernate Linq group by with condition
- EF Core SingleOrDefaultAsync compile time return type error
- Entity using include to load related tables but how to left outer join it
- How to count the number of dates in a dateTime list
- Finding 'Next Available' Key in a dictionary or related collection
- Take one and skip other duplicate item in a child table
- Retrieving a value from XML based on query parameter?
- c# iteratively removing and adding items directly to a List?
- How to convert Group By SQL to LINQ?
- Convert this SQL Statement to LINQ
- Entity Framework - Mixing model-first and database-first approaches?
- How to translate a list inside of a list to a single list with linq
- Minimize LINQ string token counter
- XElement Replacement when Child Elements and Value Exist
- LINQ IQueryable: Set 1 Parameter to accept Where Clause
- WPF VS2015 Accessing Datgrid cells when datagrid datacontext is query result
- Pulling a table from a SQL Server database into a List<> in C# using Entity Framework
- How to create a dynamic INNER JOIN Multiple Colums
- Conditional Linq Queries in VB.NET
- Nested Select in C# Linq
- Is it possible to GroupBy a set of values using linq?
- System.Guid.NewGuid() in linq select
- How to remove duplicate property from a list in C#
- How to use LINQ to select object with minimum or maximum property value
- convert foreach to LINQ statement using where
- How to format your data on a record when using linq in sql asp.net mvc 5?
- How to Union List<List<String>> in C#
- Linq cannot convert from 'System.Collections.Generic.IEnumerable<string>' to 'string[]'
- Strange behavior in Thread
