本文介绍了实体框架中的重复键异常?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
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).
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