EntityFrameworkCore 擴展類 AddOrUpdate
阿新 • • 發佈:2018-08-18
bsp spa style throw update code ase 擴展類 pap
現在項目用了前後端分離,所以每次提供接口的時候都是
Edit一個api接口,然後Add一個papi接口,
然後做了一個後端項目突然想起來EF之前好像有個擴展類 AddOrUpdate,
於是網上找了下:代碼如下
1 public static class ContextExtensions 2 { 3 public static void AddOrUpdate(this DbContext ctx, object entity) 4 { 5 var entry = ctx.Entry(entity); 6 switch(entry.State) 7 { 8 case EntityState.Detached: 9 ctx.Add(entity); 10 break; 11 case EntityState.Modified: 12 ctx.Update(entity); 13 break; 14 case EntityState.Added: 15 ctx.Add(entity);16 break; 17 case EntityState.Unchanged: 18 //item already in db no need to do anything 19 break; 20 21 default: 22 throw new ArgumentOutOfRangeException(); 23 } 24 } 25 }
參考:https://www.michaelgmccarthy.com/2016/08/24/entity-framework-addorupdate-is-a-destructive-operation/
EntityFrameworkCore 擴展類 AddOrUpdate