LINQ to Entities不识别方法'Int32 ToInt32（System.String）'方法。 mvc

Question

LINQ to Entities无法识别方法'Int32 ToInt32（System.String）'方法。

System.Web.Security.MembershipUser mu = System.Web.Security.Membership.GetUser(); 

string ID = mu.ProviderUserKey.ToString(); 

if(db.resume.Where(x => x.employeeID ==Convert.ToInt32(ID)).Count() == 0) 

Answer 1

如异常消息中所述，表达式中不支持Convert.ToInt32。只是将其移出表达式：

System.Web.Security.MembershipUser mu = System.Web.Security.Membership.GetUser(); 

string ID = mu.ProviderUserKey.ToString(); 
int IID = Convert.ToInt32(ID); 

if(db.resume.Where(x => x.employeeID == IID).Count() == 0)