Question

I’m trying to take a POCO object and update it with Linq2SQL using an XML mapping file… This what what I have:

using System; using System.Collections.Generic; using System.Linq; using System.Text;  namespace Business.Objects {     public class AchievementType     {         public int Id { get; set; }         public string Name { get; set; }     } }   <?xml version='1.0' encoding='utf-8' ?> <Database Name='Name' xmlns='http://schemas.microsoft.com/linqtosql/mapping/2007'>   <Table Name='dbo.AchievementTypes' Member='Business.Objects.AchievementType'>     <Type Name='Business.Objects.AchievementType'>       <Column Name='Id' Member='Id' IsDbGenerated='true' IsPrimaryKey='true' />       <Column Name='Name' Member='Name' />     </Type>   </Table> </Database>  CREATE TABLE AchievementTypes (     Id          INTEGER         IDENTITY NOT NULL,     Name        NVARCHAR(255)   NOT NULL,      CONSTRAINT PK_AchievevementTypes          PRIMARY KEY (Id),      CONSTRAINT UQ_AchievementTypes         UNIQUE (Name) ) 

and i’m doing the following to update it:

var type_repo = new BaseRepository<AchievementType>(); var t1 = new AchievementType { Name = 'Foo' }; type_repo.Insert(t1); t1.Name = 'Baz'; type_repo.Save(t1, 'Id'); 

and my repository Save is just doing:

public void Update(TData entity) {     using (var ctx = MyDataContext())     {         ctx.GetTable<TData>().Attach(entity);         ctx.SubmitChanges();     } } 

The update doesn’t fail or anything, but the data in the database has not changed.

Answer 1

Bah, right after I asked I found some documentation on it.

Since Context isn’t tracking the changes, you need to do the following:

ctx.Refresh(RefreshMode.KeepCurrentValues, entities);