Business rule validation of hierarchical list of objects ASP.NET MVC
- by SergeanT
I have a list of objects that are organized in a tree using a Depth property:
public class Quota
{
[Range(0, int.MaxValue, ErrorMessage = "Please enter an amount above zero.")]
public int Amount { get; set; }
public int Depth { get; set; }
[Required]
[RegularExpression("^[a-zA-Z]+$")]
public string Origin { get; set; }
// ... another properties with validation attributes
}
For data example (amount - origin)
100 originA
200 originB
50 originC
150 originD
the model data looks like:
IList<Quota> model = new List<Quota>();
model.Add(new Quota{ Amount = 100, Depth = 0, Origin = "originA");
model.Add(new Quota{ Amount = 200, Depth = 0, Origin = "originB");
model.Add(new Quota{ Amount = 50, Depth = 1, Origin = "originC");
model.Add(new Quota{ Amount = 150, Depth = 1, Orinig = "originD");
Editing of the list
Then I use Editing a variable length list, ASP.NET MVC 2-style to raise editing of the list.
Controller actions QuotaController.cs:
public class QuotaController : Controller
{
//
// GET: /Quota/EditList
public ActionResult EditList()
{
IList<Quota> model = // ... assigments as in example above;
return View(viewModel);
}
//
// POST: /Quota/EditList
[HttpPost]
public ActionResult EditList(IList<Quota> quotas)
{
if (ModelState.IsValid)
{
// ... save logic
return RedirectToAction("Details");
}
return View(quotas); // Redisplay the form with errors
}
// ... other controller actions
}
View EditList.aspx:
<%@ Page Title="" Language="C#" ... Inherits="System.Web.Mvc.ViewPage<IList<Quota>>" %>
...
<h2>Edit Quotas</h2>
<%=Html.ValidationSummary("Fix errors:") %>
<% using (Html.BeginForm()) {
foreach (var quota in Model)
{
Html.RenderPartial("QuotaEditorRow", quota);
} %>
<% } %>
...
Partial View QuotaEditorRow.ascx:
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Quota>" %>
<div class="quotas" style="margin-left: <%=Model.Depth*45 %>px">
<% using (Html.BeginCollectionItem("Quotas")) { %>
<%=Html.HiddenFor(m=>m.Id) %>
<%=Html.HiddenFor(m=>m.Depth) %>
<%=Html.TextBoxFor(m=>m.Amount, new {@class = "number", size = 5})%>
<%=Html.ValidationMessageFor(m=>m.Amount) %>
Origin:
<%=Html.TextBoxFor(m=>m.Origin)%>
<%=Html.ValidationMessageFor(m=>m.Origin) %>
...
<% } %>
</div>
Business rule validation
How do I implement validation of business rule:
Amount of quota and sum of amounts of nested quotas should equal (e.a. 200 = 50 + 150 in example)?
I want to appropriate inputs Html.TextBoxFor(m=>m.Amount) be highlighted red if the rule is broken for it.
In example if user enters not 200, but 201 - it should be red on submit.
Using sever validation only.
Thanks a lot for any advise.
