问题描述
当我将具有给定用户名的现有用户插入我的数据库时,我试图捕捉抛出的异常.正如标题所说,我正在使用EF.当我尝试将用户插入 db 时引发的唯一异常是UpdateException" - 如何提取此异常以确定它是重复异常还是其他异常?
I'm trying to catch the exception thrown when I insert a already existing user with the given username into my database. As the title says then I'm using EF. The only exception that's thrown when I try to insert the user into to db is a "UpdateException" - How can I extract this exception to identify whether its a duplicate exception or something else?
推荐答案
catch (UpdateException ex) { SqlException innerException = ex.InnerException as SqlException; if (innerException != null && innerException.Number == ??????) { // handle exception here.. } else { throw; } }
在 ?????? 处输入与唯一约束违规相对应的正确数字(我完全不知道).
Put the correct number at ?????? that corresponds to unique constraint violation (I don't know it from the top of my head).