我需要复制并粘贴我桌子的一些记录,但只需更换一个字段 这是我的代码:
using (ClearWhiteDBEntities cwContext = new ClearWhiteDBEntities())
{
var qlstfld = from lstflds in cwContext.tblListFields
where lstflds.listId == theLongSrc
select lstflds;
foreach (var item in qlstfld)
{
tblListField lstFldRow = new tblListField
{
name = item.name,
filterFieldId = item.filterFieldId,
listId = theLongDes, //this field must be change in paste
continueById = item.continueById,
destinationId = item.destinationId,
conditionId = item.conditionId,
userId = userId,
date = Convert.ToDateTime(DateTime.Now.ToShortDateString()),
time = DateTime.Now.TimeOfDay,
IP = trueIp
};
cwContext.AddTotblListFields(lstFldRow);
cwContext.SaveChanges();
}
}
但是我收到了这个错误:
在提供程序连接上启动事务的错误。有关细节,请参阅内部异常。
复制和粘贴记录但更改一个字段的最佳解决方案是什么?
答案 0 :(得分:0)
如果您正在使用更改跟踪:
using (ClearWhiteDBEntities cwContext = new ClearWhiteDBEntities())
{
var qlstfld = from lstflds in cwContext.tblListFields
where lstflds.listId == theLongSrc
select lstflds;
foreach (var item in qlstfld)
{
cwContext.ObjectStateManager.ChangeObjectState(item, System.Data.EntityState.Added);
item.Id = 0;
item.listId = theLongDes; //this field must be change in paste
}
cwContext.SaveChanges();
}