I have been looking through the net for the past few days but still couldn't get what I want. Maybe is my way for researching is wrong. But here's the problem I have an Order Model
public class Order
{
[Key]
public int Id { get; set; }
public int TotalItems { get; set; }
public DateTime DeliveryDate { get; set; }
public string OrderNumber { get; set; }
public string DeliveryAddress { get; set; }
[ForeignKey("ClientId")]
public int ClientId { get; set; }
public int OrderItemId { get; set; }
[ForeignKey("OrderItemId")]
public List<OrderItem> OrderItems { get; set; }
public Client Client { get; set; }
}
And an OrderItem model
public class OrderItem
{
public int Id { get; set; }
[ForeignKey("OrderId")]
public int OrderId{ get; set; }
public int InventoryInfoId { get; set; }
[ForeignKey("InventoryInfoId")]
[Required]
public string ItemCode { get; set; }
public int Quantity { get; set; }
public virtual InventoryInfo InventoryInfo { get; set; }
public Order Order { get; set; }
}
One Order can have many OrderItems base on the users input. This is my OrderViewModel
public class OrderViewModel
{
//public int OrderId { get; set; }
//public string OrderNumber { get; set; }
//public string DeliveryAddress { get; set; }
//public int ClientId { get; set; }
//public DateTime Deliverydate { get; set; }
public Order Order { get; set; }
public IList<OrderItem> OrderItems { get; set; }
public int ItemCode { get; set; }
public int Quantity { get; set; }
}
Here's my Create.cshtml
<div >
<div >
<form asp-action="Create">
<div asp-validation-summary="All" ></div>
<div >
<label asp-for="Order.ClientId" ></label>
<select asp-for="Order.ClientId" asp-items="ViewBag.ClientId">
<option>-- Select Client --</option>
</select>
<span asp-validation-for="Order.ClientId" ></span>
</div>
<div >
<label asp-for="Order.OrderNumber" ></label>
<input asp-for="Order.OrderNumber" />
<span asp-validation-for="Order.OrderNumber" ></span>
</div>
<div >
<label asp-for="Order.DeliveryDate" ></label>
<input type="date" data-val="true" asp-for="Order.DeliveryDate" />
<span asp-validation-for="Order.DeliveryDate" ></span>
</div>
<div >
<label asp-for="Order.DeliveryAddress" ></label>
<input asp-for="Order.DeliveryAddress" />
<span asp-validation-for="Order.DeliveryAddress" ></span>
</div>
<table id="tblCustomers" cellpadding="0" cellspacing="0">
<thead>
<tr>
<th style="width:150px">Item Code</th>
<th style="width:150px">Quantity</th>
<th></th>
</tr>
</thead>
<tbody></tbody>
<tfoot id="item-list">
<tr>
<td>
<select asp-for="OrderItems[0].ItemCode" asp-items="@ViewBag.Item"></select>
</td>
<td><input type="text" asp-for="OrderItems[0].Quantity" /></td>
@*<td><input type="button" id="btnAdd" value="Add" /></td>*@
</tr>
</tfoot>
</table>
<button id="add">Add another item</button>
<div >
<input type="submit" value="Create" />
</div>
</form>
</div>
</div>
@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
<script>
$("#add").click(function (e) {
e.preventDefault();
var i = ($(".items").length) / 2;
var model = @Html.Raw(@ViewBag.Items);
var n = '<tr><td><select id="OrderItems_' 1 '_ItemCode" name="OrderItems[' 1 '].ItemCode" /></td>'
'<td><input type="text" name="OrderItems[' 1 '].Quantity" /></td></tr>'
$("#item-list").append(n);
var Items = "";
$(model).each(function (e) {
Items = Items '<option value="' this.Value '">' this.Text '</option>'
});
var subItemList = $("#OrderItems" 1 "_ItemCode");
subItemList.empty();
subItemList.append(Items);
});
</script>
}
There are two parts for the user, Order Details and Order Items And here is my OrdersController Create
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("ClientId", "OrderNumber", "DeliveryDate", "DeliveryAddress")]OrderViewModel OrderVM)
{
try
{
if (ModelState.IsValid)
{
var order = new Order()
{
Id = OrderVM.OrderId,
DeliveryAddress = OrderVM.DeliveryAddress,
DeliveryDate = OrderVM.Deliverydate,
OrderNumber = OrderVM.OrderNumber
};
_context.Add(order);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
}
catch (DbUpdateException ex)
{
//Log the error(uncomment ex variable name and write a log.
ModelState.AddModelError("", "Unable to save changes. "
"Try again, and if the problem persists "
"see your system administrator.");
}
PopulateClientDropDownList(OrderVM.ClientId);
CreateMultipleOrderItem();
return View(OrderVM);
}
I'm actually so lost right now as I have tried several tutorials and look through examples but it seems that nothing can help me with this. Maybe I couldn't understand them. Please help me guys!
With the help of Jeffery.
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(OrderViewModel OrderVM)
{
try
{
if (ModelState.IsValid)
{
//var order = new Order()
//{
// Id = OrderVM.OrderId,
// DeliveryAddress = OrderVM.DeliveryAddress,
// DeliveryDate = OrderVM.Deliverydate,
// OrderNumber = OrderVM.OrderNumber
//};
_context.AddRange(OrderVM);
//_context.AddRange(OrderVM.OrderItems);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
}
catch (DbUpdateException ex)
{
//Log the error(uncomment ex variable name and write a log.
ModelState.AddModelError("", "Unable to save changes. "
"Try again, and if the problem persists "
"see your system administrator.");
}
PopulateClientDropDownList(OrderVM.Order.ClientId);
CreateMultipleOrderItem();
return View(OrderVM);
}
The edited version of the controller allows the data to pass from my view page to the controller. However there's an error.InvalidOperationException: The entity type 'OrderViewModel' was not found. Ensure that the entity type has been added to the model. Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.GetOrCreateEntry(object entity)
CodePudding user response：
Try something like this
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(OrderViewModel OrderVM)
{
try
{
if (ModelState.IsValid)
{
var order = new Order()
{
// Id = OrderVM.OrderId,- Primary keys will be auto generated
DeliveryAddress = OrderVM.DeliveryAddress,
DeliveryDate = OrderVM.Deliverydate,
OrderNumber = OrderVM.OrderNumber,
ClientId = OrderVM.ClientId,
TotalItems = OrderVM.TotalItems,
OrderItems = OrderVM.Select(item => new OrderItem()
{
ItemCode = item.ItemCode,
Quantity = item.Quantity,
InventoryInfoId = item.InventoryInfoId
}).ToList()
};
await _context.Orders.AddAsync(order);
//_context.AddRange(OrderVM.OrderItems);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
}
catch (DbUpdateException ex)
{
//Log the error(uncomment ex variable name and write a log.
ModelState.AddModelError("", "Unable to save changes. "
"Try again, and if the problem persists "
"see your system administrator.");
}
PopulateClientDropDownList(OrderVM.Order.ClientId);
CreateMultipleOrderItem();
return View(OrderVM);
}