当我在ASP.NET中使用EF调用update时会抛出此错误：
System.InvalidOperationException：属性＆＃39; Id＆＃39;是对象关键信息的一部分，不能修改。
我很感激能为此提供一些帮助。
控制器代码：
Save和Update方法代码：
[HttpPost]
public JsonResult CashVoucherSaveData(CashVoucherFormViewModel cashVoucherFormViewModel)
{
try
{
int? id = null;
Voucher voucher;
VoucherDetail voucherDetail;
if (cashVoucherFormViewModel.Id == null)
{
voucher = new Voucher();
voucherDetail = new VoucherDetail();
}
else
{
id = (int)cashVoucherFormViewModel.Id;
voucher = _voucherService.GetVoucherById((int)id);
voucherDetail = _voucherDetailService.GetVoucherDetailById((int)id);
}
// voucherFormViewModel.Debit = 33;
voucher = (Voucher)Mapper.Map(cashVoucherFormViewModel, voucher, typeof(CashVoucherFormViewModel), typeof(Voucher));
voucherDetail = (VoucherDetail)Mapper.Map(cashVoucherFormViewModel, voucherDetail, typeof(CashVoucherFormViewModel), typeof(VoucherDetail));
voucher.FinancialYearId = 2;
voucher.CompanyId = 2;
voucher.BusinessUnitId = 6;
voucher.Prefix = "3";
//voucherDetail.Serial = 3;
// voucher.Code = "23"; // voucher #
VoucherValidator voucherValidator = new VoucherValidator();
VoucherDetailValidator voucherDetailValidator = new VoucherDetailValidator();
ValidationResult validationResult = voucherValidator.Validate(voucher);
ValidationResult validationResultVoucheDetail = voucherDetailValidator.Validate(voucherDetail);
if (validationResult.IsValid && validationResultVoucheDetail.IsValid)
{
if (id == null)
{
_voucherService.CreateVoucher(voucher);
_voucherDetailService.CreateVoucherDetail(voucherDetail);
}
else
{
_voucherService.Update(voucher);
_voucherDetailService.Update(voucherDetail);
}
_voucherService.SaveVoucher();
_voucherDetailService.SaveVoucherDetail();
return new JsonSuccessResult();
}
else
{
Response.StatusCode = (int)ResponseCode.UnprocessableEntity;
return new JsonErrorResult(validationResult);
}
}
catch (Exception ex)
{
Response.StatusCode = (int)ResponseCode.UnprocessableEntity;
return new JsonErrorResult(ex.ToString());
}
}
查看代码：
@model RPS.WebApp.Areas.Accounting.ViewModels.CashVoucherFormViewModel
<div id="modal_backdrop" class="modal fade" data-backdrop="false">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body">
<div class="text-center">
<h5 class="content-group-lg">Cash Payment Voucher</h5>
</div>
</div>
@using (Html.BeginForm("CashVoucherSaveData", "Vouchers", FormMethod.Post, new { @class = "stepy-basic", @id = "frmVoucher", @role = "form" }))
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
if (ViewBag.FormMode == FormMode.Edit)
{
@Html.HiddenFor(model => model.Id)
@Html.HiddenFor(model => model.VoucherDetailId)
}
<fieldset title="1">
<legend class="text-semibold">Basic Info</legend>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label>Voucher Date </label>
@Html.EditorFor(model => model.VoucherDate, new { htmlAttributes = new { @class = "form-control daterange-single", @type = "text", @id = "pick_date", @placeholder = "Pick a Date" } })
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Voucher #</label>
@Html.EditorFor(model => model.Code, new { htmlAttributes = new { @class = "form-control daterange-single", @type = "text", @readonly = "true", @id = "voucherCode" } })
</div>
</div>
</div>
<div class="row">
<!--Start Debit account Field-->
<div class="col-md-12 " id="DebitAcc">
<div class="form-group">
<label>Debit Account</label>
@Html.DropDownListFor(model => model.AccountId, new SelectList(Model.Accounts, "Id", "Name"), "-- Select Debit Account --", new { @class = "select required select2insidemodal", @id = "DACC" })
</div>
</div>
<!--End Debit account Field-->
</div>
</fieldset>
<fieldset title="2">
<legend class="text-semibold">Fill Voucher</legend>
<fieldset>
<div>
<div class="col-lg-1 col-lg-offset-9" style="padding-bottom:5px;padding-left:27px;">
<button type="button" class="btn btn-info" id="addMore">
<span class="glyphicon glyphicon-plus"></span> Add More
</button>
</div>
</div>
@Html.EditorFor(model => model.Serial, new { htmlAttributes = new { @id = "serialCount" } })
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Total Debit Amount</label>
@Html.EditorFor(model => model.Debit, new { htmlAttributes = new { @class = "form-control daterange-single", @type = "text", @id = "debit", @readonly = true } })
</div>
</div>
</div>
<div id="dynamicBlock">
</div>
<hr />
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label>Credit Account</label>
@Html.DropDownListFor(model => model.AccountId, new SelectList(Model.Accounts, "Id", "Name"), "-- select account --", new { @class = "select required select2insidemodal", @id = "creditAccount" })
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Amount</label>
@Html.EditorFor(model => model.Credit, new { htmlAttributes = new { @class = "form-control", @type = "text", @id = "credit" } })
</div>
</div>
</div>
<div id ="HiddenTemplate" class="dN">
<div id="ROW-0" class="row">
<hr />
<div class="col-md-4">
<div class="form-group">
<label>Credit Account</label>
@Html.DropDownListFor(model => model.AccountId, new SelectList(Model.Accounts, "Id", "Name"), "-- select account --", new { @class = "select required select2insidemodal", @id = "creditAccount" })
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label>Amount</label>
@Html.EditorFor(model => model.Credit, new { htmlAttributes = new { @class = "form-control", @type = "text", @id = "credit" } })
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<button type="button" id="btnRemove-0" class="btn bg-teal-400 stepy-finish">Remove <i class="icon-check position-right"></i></button>
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Narration</label>
@Html.EditorFor(model => model.narration, new { htmlAttributes = new { @class = "form-control", @type = "text" } })
</div>
</div>
</div>
<span> Created by:</span> <span>Created Date:</span>
</fieldset>
</fieldset>
<button type="button" id="btnSave" class="btn bg-teal-400 stepy-finish">Save <i class="icon-check position-right"></i></button>
}
</div>
</div>
</div>
Service和repository适用于其他来电。
请帮我解决一下发生的事情。谢谢