How do I restrict the number of columns used in an INSERT when using EntityFramework?

"The store update, insert, or delete statement impacted an unexpected amount of rows (0)," says Entity Framework.

I am using Entity Framework to populate a grid control. Sometimes when I make updates I get the following error:...Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. Refresh ObjectStateManager entries....I can't figure out how to reproduce this....

How do I retrieve the row number using Entity Framework and LINQ?

You're on the right track, you just need to use the ...Queryable.Select... overload that takes an extra index. Take a look at this:...var entries = from entry in entities.PB_HiscoreEntry orderby entry.Score descending select entry; // Note the (entry, index) lambda here. var hiscores = entries.Select((entry, index) => new HiscoreItem()...

How to make entry field to allow numbers only using EF and Data Annotations?

I am trying to figure out if there is a way to make sure that numeric only input is allowed using Data Annotations and Entity Framework....I am using the following code...[Required] [DisplayName("Client No")] [Column("client_no", TypeName = "smallint")] public virtual Int16 Number { get; set; } ...I want this to be displayed using number class. ...

Entity Framework Code First Using One column as Primary Key and another as Auto Increment Column

I have a class named ...Sale...public class Sale { public int Id { get; set; } public string TrNo { get; set; } public DateTime Date { get; set; } public int CustomerID { get; set; } public ObservableCollection<SaleDetail> SaleDetails { get; set; } } ...And in the database, I want the ...Id... as the ...Auto Increment... column...

Store update, insert, or delete statement affected an unexpected number of rows (0) EntityFramework

I keep getting the following error when I try to save changes made to a context: ...Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. Refresh ObjectStateManager entries....I have the following classes:...Person...public class Person : IPe...

EntityFramework : FindBy (column name) select arbitrary column by expression tree

If you change the signature...IQueryable<User> FindBy(Expression<Func<User, bool>> predicate) { return context.Users.Where(predicate); } ...you can call...return FindBy(u => u.Username == username); ...The code hardly changes, but you don't need to manufacture expressions....You have to enter an expression (not a ...Func...) because expressions...

how to insert parent child while doing entityframework.bulkinsert?

I am using Entityframework 6, I am trying to insert a parent-child kind of data in the database. I am using Entityframework.BulkInsert to insert data. I have ...autoIncrement int primary key... in all the tables...My object is as follows :... var parentObjects= new List<parentObject>(); var childObjects= new List<childObject>(); ...

bulk insert using EntityFramework-Plus

Disclaimer...: I'm the owner of the project ...Entity Framework Plus...This library doesn't support ...BulkInsert.......Disclaimer...: I'm the owner of the project ...Entity Framework Extensions...This library supports BulkInsert but it's not free....(EF Plus is powered by this library)...In your scenario, since it looks child entity doesn't have a...

ORA-00955: name is already used by an existing object; When using Oracle.ManagedDataAccess and EntityFramework

The Problem: You are trying to create tables into the database that it already exists from the previous migration....The Solution: Delete every thing from the database first and then make your migrations....There is an oracle query that helps you to make that it's in this link ...How to drop all user tables?

How to increase insert speed using Bulk insert using AddRange and then SaveChanges in Entity Framework

I have used Entity Framework to insert data into SQL tables....For larger number of records, instead of ...Add()..., I have used ...AddRange()... and called ...SaveChanges()... later....It's still taking too much time to insert records - are there any solutions to increase the speed? ..._Repository.InsertMultiple(deviceDataList); await _Repository...