私はこのビューモデルを使用しています:
public class CaseComplaintsViewModel
{
public int CasesID { get; set; }
public int CaseComplaintID { get; set; }
public string ComplaintCode { get; set; }
public string ComplaintType { get; set; }
}
これは、ビュー モデルを使用するビューです。
@model IEnumerable<cummins_db.ViewModels.CaseComplaintsViewModel>
<table width="100%">
<tr>
<th></th>
<th></th>
<th>Complaint Code</th>
<th>Complaint Description</th>
<th>Delete</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.HiddenFor(modelItem => item.CasesID )
</td>
<td>
@Html.HiddenFor(modelItem => item.CaseComplaintID )
</td>
<td>
@Html.DisplayFor(modelItem => item.ComplaintCode )
</td>
<td>
@Html.DisplayFor(modelItem => item.ComplaintType)
</td>
<td>
@Ajax.ActionLink("Delete", "RemoveCodeFromCase", "Cases", new { caseid item.CasesID, id = item.CaseComplaintID }, null)
</td>
</tr>
}
</table>
これは、この部分ビューをメイン ビューに返すコントローラー アクションです。
public ActionResult SelectForCase(int caseid, int compid)
{
if (ModelState.IsValid)
{
CaseComplaint c = new CaseComplaint
{
CasesID = caseid,
ComplaintCodeID = compid
};
db.CaseComplaints.Add(c);
db.SaveChanges();
var data = (from C in db.CaseComplaints
where C.CasesID == caseid
select C).ToList().Select( x => new CaseComplaintsViewModel()
{
CasesID = x.CasesID,
CaseComplaintID = x.ComplaintCodeID,
ComplaintCode = x.ComplaintCode.ComplaintCodeName,
ComplaintType = x.ComplaintCode.ComplaintType
}).ToList();
return PartialView("_CaseComplaintCodes", data);
}
return PartialView("_CaseComplaintCodes");
}
db.SaveChanges
ViewModel を読み込もうとすると、その行で null 例外が発生しますComplaintCode = x.ComplaintCode.ComplaintCodeName
このビュー モデルは、CaseComplaints
および ComplaintCode モデルのビューを返すことを目的としています。
コード内のブレークポイントは、ComplaintCode
がロードされていないことを示しています。私は何かが欠けていることを知っていますが、何がわかりません。
ありがとう
** * ***編集* ** * ** * * これは私のケース モデルです
public class Cases
{
//case data model for call center
//implement lists for all related child tables too
[Key]
public int CasesID { get; set; }
public string CaseNumber { get; set; }
[Required(ErrorMessage = "Customer is Required")]
public int CustomerID { get; set; }
public virtual Customer Customer { get; set; }
[MaxLength(50)]
public string UserName { get; set; } //get user name from the aspnet membership
[Required(ErrorMessage = "Case Category is Required")]
public int CaseCategoryID { get; set; }
public int TechnicianID { get; set; }
public virtual Technician Technicians { get; set; }
[Required(ErrorMessage = "Engine Model is Required")]
public int EngineModelID { get; set; }
public virtual EngineModel EngineModel { get; set; }
[MaxLength(50)]
public string BMSWorkorder { get; set; }
[MaxLength(50)]
[Required(ErrorMessage = "Status is Required")]
public string CaseStatus { get; set; }
[MaxLength(50)]
public string OpenedBy { get; set; }
[Required(ErrorMessage = "Opened Date is Required")]
[DataType(DataType.DateTime)]
public DateTime? OpenedDate { get; set; }
[MaxLength(50)]
public string ClosedBy { get; set; }
[DataType(DataType.DateTime)]
public DateTime? ClosedDate { get; set; }
[MaxLength(50)]
[Required(ErrorMessage="Caller First Name is Required")]
public string CallerFirstName { get; set; }
[MaxLength(50)]
[Required(ErrorMessage = "Caller Last Name is Required")]
public string CallerLastName { get; set; }
[MaxLength(100)]
public string AdditionalContact { get; set; }
[MaxLength(10)]
[Required(ErrorMessage = "Qualified is Required")]
public string Qualified { get; set; }
public string Description { get; set; }
[MaxLength(50)]
[Required(ErrorMessage = "ESN is Required")]
public string ESN { get; set; }
[MaxLength(50)]
[Required(ErrorMessage = "Mileage is Required")]
public string Mileage { get; set; }
[DataType(DataType.Date)]
public DateTime? DateInService { get; set; }
[MaxLength(50)]
public string ESTR { get; set; }
[MaxLength(50)]
public string EDS { get; set; }
[MaxLength(50)]
public string GensetSerialNumber { get; set; }
[MaxLength(50)]
public string GensetModelNumber { get; set; }
//child Case Notes records
public virtual ICollection<CaseNotes> CaseNotes { get; set; }
//child case attachment records
public virtual ICollection<Attachment> Attachments { get; set; }
//child case complaint records
public virtual ICollection<CaseComplaint> CaseComplaint { get; set; }
//tracking fields
public DateTime? CreatedOn { get; set; }
[MaxLength(50)]
public string CreatedBy { get; set; }
public DateTime? ModifiedOn { get; set; }
[MaxLength(50)]
public string ModifiedBy { get; set; }
}
これは私のケースの苦情モデルです
public class CaseComplaint
{
[Key]
public int CaseComplaintID { get; set; }
public int CasesID { get; set; }
public int ComplaintCodeID { get; set; }
public virtual Cases Cases { get; set; }
public virtual ComplaintCode ComplaintCode { get; set; }
}
これは私の苦情コードモデルです
public class ComplaintCode
{
public int ComplaintCodeID { get; set; }
[MaxLength(50)]
[Required(ErrorMessage="Complaint Code is required")]
public string ComplaintCodeName { get; set; }
[MaxLength(50)]
[Required(ErrorMessage="Complaint Type is required")]
public string ComplaintType { get; set; }
public virtual ICollection<CaseComplaint> CaseComplaint { get; set; }
}