[英]Entity Framework not updating changes 6
Asp.net MVC不更新数据我有两个表的关系1:M用户与许多角色修改用户时,它保存数据,但不更新角色
if (role != "Select Role")
{
obj.Roles.Add(_context.Roles.FirstOrDefault(c => c.Name == role));
}
obj.UpdatedBy = System.Configuration.ConfigurationManager.AppSettings["UserDomain"] + Environment.UserName;
obj.UpdatedByDate = DateTime.Today;
_context.Entry(obj).State = obj.Id == 0 ? EntityState.Added : EntityState.Modified;
_context.SaveChanges();
return true;
让我修改代码------这是代码两个模型User和Role
public bool Update(User obj,string role)
{
try
{
if (role != "Select Role")
{
obj.Roles.Add(_context.Roles.FirstOrDefault(c => c.Name == role));
}
obj.UpdatedBy = System.Configuration.ConfigurationManager.AppSettings["UserDomain"] + Environment.UserName;
obj.UpdatedByDate = DateTime.Today;
_context.Entry(obj).State = obj.Id == 0 ? EntityState.Added : EntityState.Modified;
_context.SaveChanges();
return true;
}
catch (Exception e)
{
return false;
}
}
替换以下行:
obj.Roles.Add(_context.Roles.FirstOrDefault(c => c.Name == role));
与以下:
var Role = _context.Roles.FirstOrDefault(c => c.Name == role);
Role.User = obj;
_context.Entry(Role).State = EntityState.Modified;
这样,它应该可以工作。
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