c# - Add new list items to a List<T> in MVC, Razor, ASP.NET with form -

i working on order form. page loads saved order items table. first row of table add new item row html.editofor() this:

@html.editorfor(m => m.orderitems[0].description) 

of course [0] represents in case nothing, demonstrate goal. show existing items, loop used:

for (int = 1; < model.orderitems.count; i++) { @html.editorfor(d => d.orderitems[i].description)} 

the order items stored in ienumerable list 4 properties (desc, partnum, cost, qty).

the question is: editor row form , when user presses add button on page how can form add new item existing list?

you can post 'new item' action ,the param 'new item', can modify existing list now