撤销提交

var customer = ctx.Customers.Single(c => c.CustomerID =="AROUT");

 

       customer.ContactName = "zhuye";

 

       customer.Country = "Shanghai";

 

       Response.Write(string.Format("Name:{0},Country:{1}<br/>",

 

customer.ContactName, customer.Country));

 

       customer = ctx.Customers.GetOriginalEntityState(customer);

 

       Response.Write(string.Format("Name:{0},Country:{1}<br/>",

 

customer.ContactName, customer.Country));

 

上面的代码执行效果如下：

 

Name:zhuye,Country:Shanghai

 

Name:Thomas Hardy,Country:UK