实体框架多行更新

Question

I was wondering if there is a smarter/faster/one_line way to approach this.

I have a list of dll's with IsActive property. On the UI I have checkboxes which change state of dll's depending on whether the checkbox is checked or not. Change happens on button click. I have no problem traversing the whole DB so now I am doing it like this:

foreach (var item in dllList)
{
    context.dllSet.Find(item.Id).IsActive = item.IsActive;
}

( dllList is List<> element connected to WPF front).

So now I am finding element with same id in DB, and changing its state to one that is in presented in UI checkbox.

Solution I'd like would be something like this:

context.dllSet.AddOrUpdateList(dllList);

Answer 1

Create Stored procedure with Datatabel as a parameter and implement the logic in DB end.

Call your stored procedure from entity framework.

Answer 2

The fastest way is using a library supporting Batch Update

See: Entity Framework Batch Update Library

Disclaimer : I'm the owner of the project Entity Framework Plus

Example

var idsTrue = list.Where(x => x.IsActive).Select(x => x.Id).ToList();
var idsFalse = list.Where(x => !x.IsActive).Select(x => x.Id).ToList();

ctx.dllSet.Where(x => idsTrue.Contains(x.Id)).Update(x => new Dll() {IsActive = true});
ctx.dllSet.Where(x => idsFalse.Contains(x.Id)).Update(x => new Dll() {IsActive = false});

Disclaimer : I'm the owner of the project Entity Framework Extensions

Another way is using bulk operations and modifying only the IsActive column

// Update all columns
ctx.BulkUpdate(list);

// Update only IsActive column
ctx.BulkUpdate(new List<Dll>(), operation => operation.ColumnInputExpression = dll => new { dll.Id, dll.IsActive});

// Add new entities, update existing entities
ctx.BulkMerge(list);