How to: Binding Treeview to XML based on Element's value

Question

I have a list of data that comes in in XML format (I can easily parse it to objects, but I still cant figure out how to bind), and I need help with binding based on value in XML...

Sample Data:

<CustomerRet>
    <ListID>1</ListID>
    <TimeCreated>2010-09-18T09:18:16-05:00</TimeCreated>
    <TimeModified>2011-03-13T23:12:50-05:00</TimeModified>
    <Name>Alex</Name>
   <FullName>Alex</FullName>
    <IsActive>true</IsActive>
    <Sublevel>0</Sublevel>
<CustomerRet>

<CustomerRet>
    <ListID>2</ListID>
    <TimeCreated>2010-09-18T09:18:16-05:00</TimeCreated>
    <TimeModified>2011-03-13T23:12:50-05:00</TimeModified>
    <Name>Steven</Name>
    <IsActive>true</IsActive>
    <Sublevel>1</Sublevel>
    <Parent>
      <ListID>1</ListID>
      <FullName>Alex:Steven</FullName>
    </Parent>
<CustomerRet>

<CustomerRet>
    <ListID>3</ListID>
    <TimeCreated>2010-09-18T09:18:16-05:00</TimeCreated>
    <TimeModified>2011-03-13T23:12:50-05:00</TimeModified>
    <Name>John</Name>
    <IsActive>true</IsActive>
    <Sublevel>2</Sublevel>
    <Parent>
      <ListID>2</ListID>
      <FullName>Alex:Steven:John</FullName>
    </Parent>
<CustomerRet>

Desired Treeview should be some thing like this:

Alex

   Steven

       John

Customer (Alex)

 Sub-cust(Steven)

    Sub-sub-cust(John)

Also, Some customers have only 1 or no levels, and the number of levels can go upto 5.

Thanks in advance

 

Answer 1

The problem here is that you have a planified hierarchical list. I'd say the best approach would be to parse your XML into a class of your own and then use a HierarchicalDataTemplate on the TreeView.

---

Bigsby, Lisboa, Portugal
O que for, quando for, é que será o que é...
Wenn ist das Nunstruck git und Slotermeyer? Ja! ... Beiherhund das Oder die Flipperwaldt gersput!
http://bigsby.eu

Answer 2

This might help get you started.

CustomerRet.cs:

using System;
using System.Collections.Generic;
using System.Linq;

namespace HierarchicalXML
{
  public class CustomerRet
  {
    public int ListID { get; set; }
    public DateTime TimeCreated { get; set; }
    public DateTime TimeModified { get; set; }
    public string Name { get; set; }
    public string FullName { get; set; }
    public bool IsActive { get; set; }
    public int Sublevel { get; set; }
    public ParentRef Parent { get; set; }
    private List<CustomerRet> _subCustomers;
    public List<CustomerRet> SubCustomers
    { get { return _subCustomers ?? (_subCustomers = new List<CustomerRet>()); } }

    public static List<CustomerRet> HierarchizeList(List<CustomerRet> planified)
    {
      var result = new List<CustomerRet>();
      var enumerator = planified.GetEnumerator();
      foreach (var customer in planified.Where(plan => plan.Sublevel == 0))
      {
        AddChildren(customer, planified);
        result.Add(customer);
      }
      return result;
    }

    private static void AddChildren(CustomerRet parent, IEnumerable<CustomerRet> planified)
    {
      foreach (var child in planified.Where(item => null != item.Parent && item.Parent.ListID == parent.ListID))
      { 
        parent.SubCustomers.Add(child);
        AddChildren(child, planified);
      }
    }
  }

  public class ParentRef
  {
    public int ListID { get; set; }
    public string FullName { get; set; }
  }
}

MainWindow.xaml.cs

using System.Collections.Generic;
using System.Windows;
using System.IO;
using System.Xml.Serialization;

namespace HierarchicalXML
{
  public partial class MainWindow : Window
  {
    // I put your xml in a file
    private static string _filePath = @"..\List.xml";
    public MainWindow()
    {
      InitializeComponent();
      var fileStream = File.OpenRead(_filePath);
      var serializer = new XmlSerializer(typeof(List<CustomerRet>),
        null,
        new[] { typeof(ParentRef) },
        new XmlRootAttribute("Customers"), "");
      var planifiedList = serializer.Deserialize(fileStream);
      treeView.ItemsSource = CustomerRet.HierarchizeList((List<CustomerRet>)planifiedList);
    }
  }
}

And, then, the binding and templating.

MainWindow.xaml

<Window x:Class="HierarchicalXML.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
  <Grid>
    <TreeView x:Name="treeView">
      <ItemsControl.ItemTemplate>
        <HierarchicalDataTemplate ItemsSource="{Binding SubCustomers}">
          <TextBlock Text="{Binding Name}"/>
        </HierarchicalDataTemplate>
      </ItemsControl.ItemTemplate>
    </TreeView>
  </Grid>
</Window>

 

---

Bigsby, Lisboa, Portugal
O que for, quando for, é que será o que é...
Wenn ist das Nunstruck git und Slotermeyer? Ja! ... Beiherhund das Oder die Flipperwaldt gersput!
http://bigsby.eu