I am working on mvc project, with repository pattern and entity framework, now on my form i have a sample model
SampleModel
1) name
2) age
3) address
4) notes
5) date updated
I am displaying only following data on the edit form
1) name
2) age
3) address
now if i update the model with missing property values using the repository, the notes, dateupdated field goes null.
My question is how do i update only few selected properties using the repository ( tryupdatemodel not available in repository ) and i dont want to call the original object and map the properites with the updated model.
Is there any way, there must be.
You can update only subset of fields:
using (var context = new YourDbContext())
{
context.SamepleModels.Attach(sampleModel);
DbEntityEntry<SameplModel> entry = context.Entry(sampleModel);
entry.Property(e => e.Name).IsModified = true;
entry.Property(e => e.Age).IsModified = true;
entry.Property(e => e.Address).IsModified = true;
context.SaveChanges();
}
or in ObjectContext API:
using (var context = new YourObjectContext())
{
context.SamepleModels.Attach(sampleModel);
ObjectStateEntry entry = context.ObjectStateManager.GetObjectStateEntry(sampleModel);
entry.SetModifiedProperty("Name");
entry.SetModifiedProperty("Age");
entry.SetModifiedProperty("Address");
context.SaveChanges();
}
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