如何一次在桌面上创建多行? 我希望能够添加不存在的行,并在每次按提交时编辑/更新现有行。
为了测试这个,我只在数据库中创建了2个字段,似乎无法添加多行。
numofbuilding的值= 5。 只插入一行。
尝试:
public ActionResult CreateBuildings(Guid pi, int? numofbuilding)
{
OnboardModel model = new OnboardModel();
List<onboard_BuildingInfo> coms = new List<onboard_BuildingInfo>();
for (int i = 1; i <= (numofbuilding+1); i++)
{
onboard_BuildingInfo f = new onboard_BuildingInfo
{
projectID = pi,
building_ID = i
};
coms.Add(f);
}
context.onboard_BuildingInfos.InsertAllOnSubmit(coms);
context.SubmitChanges();
return View(model);
}
并尝试:
public ActionResult CreateBuildings(Guid pi, int? numofbuilding)
{
OnboardModel model = new OnboardModel();
for (int i = 1; i <= numofbuilding; i++)
{
onboard_BuildingInfo coms = new onboard_BuildingInfo
{
projectID = pi,
building_ID = i
};
context.onboard_BuildingInfos.InsertOnSubmit(coms);
context.SubmitChanges();
}
return View(model);
}
BuildingInfo-表
Create Table onboard_BuildingInfo (
projectID UNIQUEIDENTIFIER DEFAULT NEWID() ,
building_ID int NULL ,
city_building varchar(500) NULL ,
numberofcommon INT NULL
PRIMARY KEY (projectID)
)
答案 0 :(得分:0)
使projectID
不是主键,或在projectID
和building_ID
上设置复合键。主键必须唯一,因此projectID
列中不能包含重复项。复合键意味着(projectID
* building_ID
)的组合必须是唯一的,因此您可能在任一列中都有重复项,但不能同时包含两者。