尝试编辑对象时,我在我的 asp.net mvc Web 应用程序中收到以下错误:-
ObjectStateManager 中已存在具有相同键的对象。ObjectStateManager 无法跟踪具有相同键的多个对象。
Post Edit 操作方法是:-
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(ServerJoin sj, FormCollection formValues)
{
string controllername = RouteData.Values["controller"].ToString();
var databaseTechnology = repository.FindTechnology(sj.Server.RackID);
//code goes here
repository.InsertOrUpdateServer(sj.Server, User.Identity.Name, sj.Resource.RESOURCEID);
repository.Save();
return RedirectToAction("Details", new { id = sj.Server.TMSServerID });
//codegoes here
}
执行编辑并导致异常的存储库方法是:-
public void InsertOrUpdateServer(TMSServer server, string username,long assetid)
{
var resource = GetResourceDetials(assetid);
if (server.TMSServerID == default(int))
{
// New entity
//codegoes here
else
{
var auditinfo = IntiateTechnologyAudit(tms.AuditActions.SingleOrDefault(a => a.Name.ToUpper() == "EDIT").ID,
tms.TechnologyTypes.SingleOrDefault(a => a.Name.ToUpper() == "SERVER").AssetTypeID,
username, server.TMSServerID);
server.IT360SiteID = resource.SITEID.Value;
tms.Entry(server).State = EntityState.Modified;
InsertOrUpdateTechnologyAudit(auditinfo);
}
}
审计的存储方法是:-
public TechnologyAudit IntiateTechnologyAudit(int actionId, int assettypeID, string username, int? technologyID)
{
TechnologyAudit ta = new TechnologyAudit();
ta.ActionID = actionId;
ta.AssetTypeID = assettypeID;
ta.DateTimeStart = DateTime.Now;
ta.UserName = username;
if (technologyID != null)
{
ta.TechnologyID = technologyID.Value;
}
return ta;
}
public void InsertOrUpdateTechnologyAudit(TechnologyAudit ta)
{
if (ta.ID == default(int))
{
// New entity
ta.DateTimeEnd = DateTime.Now;
tms.TechnologyAudits.Add(ta);
}
else
{
// Existing entity
tms.Entry(ta).State = EntityState.Modified;
}
}
TMSServer 的模型类是:-
public partial class TMSServer
{
public TMSServer()
{
this.TMSVirtualMachines = new HashSet<TMSVirtualMachine>();
}
public int TMSServerID { get; set; }
public Nullable<int> ServerModelID { get; set; }
public int DataCenterID { get; set; }
public string ILOIP { get; set; }
public int RackID { get; set; }
public Nullable<int> StatusID { get; set; }
public Nullable<int> BackUpStatusID { get; set; }
public int RoleID { get; set; }
public Nullable<int> OperatingSystemID { get; set; }
public Nullable<int> VirtualCenterID { get; set; }
public string Comment { get; set; }
public byte[] timestamp { get; set; }
public long IT360SiteID { get; set; }
public virtual DataCenter DataCenter { get; set; }
public virtual OperatingSystem OperatingSystem { get; set; }
public virtual ServerModel ServerModel { get; set; }
public virtual Technology Technology { get; set; }
public virtual TechnologyBackUpStatu TechnologyBackUpStatu { get; set; }
public virtual TechnologyRole TechnologyRole { get; set; }
public virtual TechnologyStatu TechnologyStatu { get; set; }
public virtual TMSRack TMSRack { get; set; }
public virtual ICollection<TMSVirtualMachine> TMSVirtualMachines { get; set; }
}
该技术的模型类别是:-
public partial class Technology
{
public Technology()
{
this.TMSSwitchPorts = new HashSet<TMSSwitchPort>();
this.TechnologyAudits = new HashSet<TechnologyAudit>();
this.TechnologyIPs = new HashSet<TechnologyIP>();
}
public int TechnologyID { get; set; }
public string Tag { get; set; }
public bool IsDeleted { get; set; }
public byte[] timestamp { get; set; }
public Nullable<int> TypeID { get; set; }
public Nullable<System.DateTime> StartDate { get; set; }
public Nullable<long> IT360ID { get; set; }
public virtual TMSFirewall TMSFirewall { get; set; }
public virtual TMSRack TMSRack { get; set; }
public virtual TMsRouter TMsRouter { get; set; }
public virtual TMSServer TMSServer { get; set; }
public virtual TMSStorageDevice TMSStorageDevice { get; set; }
public virtual TMSSwitch TMSSwitch { get; set; }
public virtual ICollection<TMSSwitchPort> TMSSwitchPorts { get; set; }
public virtual TechnologyType TechnologyType { get; set; }
public virtual ICollection<TechnologyAudit> TechnologyAudits { get; set; }
public virtual ICollection<TechnologyIP> TechnologyIPs { get; set; }
public virtual TMSVirtualMachine TMSVirtualMachine { get; set; }
}
我在 tms.Entry(server).State = EntityState.Modified;
InsertOrUpdateServer 存储库方法内部收到错误。知道是什么导致了这个异常吗?记住我只跟踪一个 TMSServer 对象。
提前感谢您的帮助。