c# – “实体类型不是当前上下文模型的一部分”当项目包含多个EDMX文件时抛出错误

概述我首先使用数据库,我有一个如下所示的switch语句： switch (site){ case Site.One: using (OneContext one = new OneContext()) return one.OrganizationObjects.SingleOrDefault(x => x.u_Name == orgName)?.g 我首先使用数据库,我有一个如下所示的switch语句：

switch (site){    case Site.One:        using (OneContext one = new OneContext())            return one.OrganizationObjects.SingleOrDefault(x => x.u_name == orgname)?.g_org_ID;    case Site.Two:        using (TwoContext two = new TwoContext())            return two.OrganizationObjects.SingleOrDefault(x => x.u_name == orgname)?.g_org_ID;    default:        throw new NotImplementedException();}

两个数据库非常相似,并且几乎具有所有相同的模型.

如果我删除“两个”EDMX文件并注释掉条件,那么OneContext可以正常工作.如果我将TwoContext EDMX文件添加到项目并再次运行代码,则“OneContext”代码在尝试查询OrganizationObject时失败.

我确保每个上下文都使用正确的连接字符串,但仍会出现此错误：

解决方法

Workaround: Change a property on one of the two IDentical classes.

EF matches on class name AND class propertIEs. So I just changed a
property name on one of the EF objects,and the error is gone.

As @Entrodus commented on one of the other answers:

EF collision happens only when two classes have the same name AND the
same set of parameters.

The mapping of CLR type to EDM type is ambiguous with EF 6 & 5?

总结

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