Hello，Arief Handany

The Attachment is my video, please have a look about it . Thank you very much!

Hello,Yudi

I ran your sample, when I add the first record, it ran normal, but when I add the second recode, it cause wrong. The attachment is my video about operation. Please have a look, and tell me why? Thank you very much! 

My test show WebGrid does have issue when adding new row with guid column key using BatchUpdate, However the issue is the key value of the guid is clipped so it will only get a few character of the guid not the whole guid. A bug report has been submitted to the developer.

I use Multi primary key  column, and  enable batch update , it occurs the problem as above.I found this problem have not been solved at Intersoft Premier Studio 2014 R1 SP1,could you tell me the time when you would solved this problem?