Question

嗨我试图更新操作但是在更新它时显示错误接近db。保存更改（）。

它显示了下面提到的错误

EntityFramework.dll中发生了'System.Data.Entity.Infrastructure.DbUpdateException'类型的异常，但未在用户代码中处理

所以我搜索了内部异常。它显示了下面提到的错误。

“违反PRIMARY KEY约束'PK__UserRights__0155B971'。无法在对象'dbo.UserRights'中插入重复键。\ r \ n语句已终止。”}

我的控制器代码

   public ActionResult UsetBasedAuthenticationEditSave(UserAuthenticationViewModel objuavm )
    {
        ViewBag.UserID = new SelectList(db.UserDetails, "UserID", "UserName", objuavm.UserID);
        ViewBag.ModuleID = new SelectList(db.UserModules, "ModuleID", "ModuleName", objuavm.ModuleID);
        ViewBag.SubModule = new SelectList(db.UserModules, "SubModule", "SubModule", objuavm.SubModule);

        var objuserrightsresult = db.UserRights.Find(objuavm.UserRitsID);
        if(objuserrightsresult!=null)
        {
            objuserrightsresult.UserID = objuavm.UserID;
            objuserrightsresult. ModuleID = objuavm.ModuleID;
            objuserrightsresult. Toview = Convert.ToBoolean(objuavm.Toview);
            objuserrightsresult. ToAdd = Convert.ToBoolean(objuavm.ToAdd);
            objuserrightsresult. ToEdit = Convert.ToBoolean(objuavm.ToEdit);
            objuserrightsresult. ToDelete = Convert.ToBoolean(objuavm.ToDelete);
            objuserrightsresult.IsActive = Convert.ToBoolean(objuavm.IsActive);
            objuserrightsresult.IsDeleted = Convert.ToBoolean(objuavm.IsDeleted);
            objuserrightsresult. EditedDate = DateTime.Now;
            objuserrightsresult. LastActiveOn = DateTime.Now;
            objuserrightsresult. RowID = Guid.NewGuid();
            objuserrightsresult. CreatedSeesionID = Guid.NewGuid();
            objuserrightsresult. EditedSessionID = Guid.NewGuid();
            objuserrightsresult. OfflineMode = false;
            objuserrightsresult.OfflineID = Guid.NewGuid();
            objuserrightsresult.SubModule = objuavm.SubModule;
            db.UserRights.Add(objuserrightsresult);
           }
        db.SaveChanges();
        return RedirectToAction("UserBasedAuthenticationIndex");
    }

Answer 1

评论此行：

//db.UserRights.Add(objuserrightsresult);

由于您正在进行更新，因此不应再次添加...只需更新字段值，然后只需调用db.SaveChanges();

“违反PRIMARY KEY约束'PKUserRights0155B971'。无法在对象'dbo.UserRights'中插入重复键。

1 个答案: