我有一个列表，这个列表正在通过循环填充。每个循环直接从DB获取一个集合。问题是，当它获得CaseNo（PK）时，列表中存在相同的CaseNo并且我更改了其中一个属性的值，那么具有相同CaseNo的项目也已经在列表中也会发生变化。
离。 caseNo 1234，proc code = OTH
然后我再添加一个我从DB获得的项目。但这次我以编程方式更改了proc代码，上面列表中的项也也更改为该值。 我不希望发生这种情况，因为它与记录中的Case不同，因为Case可以将不同类型的专业代码作为其类别。
我知道它正在改变，因为它检测到它与列表中的项目相同，但是我需要在列表中添加相同的案例编号作为单独的项目，因为proc代码是不同的。有没有办法可以将它视为与列表中的实体不同的实体？
实施例。数据的 1.）CaseNO 123 Proc代码OTH 2.）CaseNO 123 Proc代码OTH
但我需要它： 1.）CaseNO 123 Proc代码DSP 1.）CaseNO 123 Proc代码OTH
执行此行时出错。
adrCase.ProcCode = "DSP";
然后列表中的项目（_adrMasterList）如果有任何相同的情况没有，则将其proc代码更改为“DSP”。
这是我的代码：
private void GenerateReport(string caseCoordinatorID) //LGF 08012011 ADR-59: add case coordinator - add parameter
{
var dispositions = FileMaintenanceBusiness.Instance.GetManyDispositionInfobyKeyword(_selectedProcCode, "ProcCode");
var adrDispos = FileMaintenanceBusiness.Instance.GetAllADRDispositionInfoList();
var calendarActivities = FileMaintenanceBusiness.Instance.GetManyCalendarActivityInfobyKeyword(_selectedProcCode, "ProcCode");
var adrCalActivities = FileMaintenanceBusiness.Instance.GetAllADRCalendars();
var otherActivities = FileMaintenanceBusiness.Instance.GetManyOtherActivities(_selectedProcCode, "ProcCode");
var adrOtherActivities = FileMaintenanceBusiness.Instance.GetAllADROtherActivities();
_adrMasterList.Clear();
if (_selectedProcCode == "ALL")
{
var dispositionALL = FileMaintenanceBusiness.Instance.GetAllDispositionInfoList();
var adrDisposALL = FileMaintenanceBusiness.Instance.GetAllADRDispositionInfoList();
var calendarActivitiesALL = FileMaintenanceBusiness.Instance.GetAllCalendarActivityInfoList();
var adrCalActivitiesALL = FileMaintenanceBusiness.Instance.GetAllADRCalendars();
var otherActivitiesALL = FileMaintenanceBusiness.Instance.GetAllOtherActivities();
var adrOtherActivitiesALL = FileMaintenanceBusiness.Instance.GetAllADROtherActivities();
if (dispositionALL != null && adrDisposALL != null)//dispos
{
foreach (var dispo in dispositionALL)
{
foreach (var adrDispo in adrDisposALL)
{
if (dispo.DispositionID == adrDispo.DispositionID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrDispo.CaseNo, "CaseNo");
if (adrCase != null)
{
adrCase.ProcCode = "DSP";
adrCase.ProcDateString = dispo.ProcDate.HasValue ? dispo.ProcDate.Value.ToShortDateString() : string.Empty;
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
//if (!_adrMasterList.Contains(adrCase) && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
// _adrMasterList.Add(adrCase);
if (CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
_adrMasterList.Add(adrCase);
}
}
}
}
}
if (calendarActivitiesALL != null && adrCalActivitiesALL != null)//cals
{
foreach (var cal in calendarActivitiesALL)
{
foreach (var adrCal in adrCalActivitiesALL)
{
if (cal.CalendarItemID == adrCal.CalendarItemID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrCal.CaseNo, "CaseNo");
if (adrCase != null)
{
adrCase.ProcCode = "CAL";
adrCase.ProcDateString = cal.ProcDate.ToShortDateString();
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
//if (!_adrMasterList.Contains(adrCase) && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
// _adrMasterList.Add(adrCase);
if (CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
_adrMasterList.Add(adrCase);
}
}
}
}
}
if (otherActivitiesALL != null && adrOtherActivitiesALL != null)//other activities
{
foreach (var otherActivity in otherActivitiesALL)
{
foreach (var adrotherActivity in adrOtherActivitiesALL)
{
if (otherActivity.ActivityID == adrotherActivity.ActivityID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrotherActivity.CaseNo, "CaseNo");
if (adrCase != null)
{
adrCase.ProcCode = otherActivity.ProcCode;
adrCase.ProcDateString = otherActivity.ProcDate.ToShortDateString();
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
//if (!_adrMasterList.Contains(adrCase) && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
if(CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
_adrMasterList.Add(adrCase);
}
}
}
}
}
}
else if (_selectedProcCode == "DSP")
{
if (dispositions != null && adrDispos != null)
{
foreach (var dispo in dispositions)
{
foreach (var adrDispo in adrDispos)
{
if (dispo.DispositionID == adrDispo.DispositionID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrDispo.CaseNo, "CaseNo");
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
if (adrCase != null && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
{
adrCase.ProcCode = _selectedProcCode;
//adrCase.ProcDateString = dispo.ProcDate.ToShortDateString();
_adrMasterList.Add(adrCase);
}
}
}
}
}
}
else if (_selectedProcCode == "CAL")
{
if (calendarActivities != null && adrCalActivities != null)
{
foreach (var cal in calendarActivities)
{
foreach (var adrCal in adrCalActivities)
{
if (cal.CalendarItemID == adrCal.CalendarItemID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrCal.CaseNo, "CaseNo");
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
if (adrCase != null && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
{
adrCase.ProcCode = _selectedProcCode;
adrCase.ProcDateString = cal.ProcDate.ToShortDateString();
_adrMasterList.Add(adrCase);
}
}
}
}
}
}
else
{
if (otherActivities != null && adrOtherActivities != null)
{
foreach (var otherActivity in otherActivities)
{
foreach (var adrotherActivity in adrOtherActivities)
{
if (otherActivity.ActivityID == adrotherActivity.ActivityID)
{
var adrCase = FileMaintenanceBusiness.Instance.GetADRMasterInfobyKeyword(adrotherActivity.CaseNo, "CaseNo");
//LGF 08012011 ADR-59: add case coordinator - add CaseCoordinatorFilter
if (adrCase != null && CaseCoordinatorFilter(caseCoordinatorID, adrCase.CaseNo))
{
adrCase.ProcCode = _selectedProcCode;
adrCase.ProcDateString = otherActivity.ProcDate.ToShortDateString();
_adrMasterList.Add(adrCase);
}
}
}
}
}
}
GeneratePrintReport();
}
答案 0 :(得分：0)
由于内部identity map pattern实施，这种情况正在发生。您永远不能将具有相同实体键的两个实体实例附加到同一上下文。加载实体后，您只需致电Detach。
context.Detach(entity);
或者您可以尝试将实体加载为非跟踪（我不确定它是否解决了这个问题）：
context.YourEntitySet.MergeOption = MergeOption.NoTracking;
// Now run the query from YourEntitySet
无论如何，您希望相同实体的两个实例具有不同的值，这很奇怪。您应该为“报告”使用单独的非实体对象，并对该对象进行投影。你根本不需要处理这个问题。