如何递归填充ASP.NET Treeview？

Question

I have an ASP.NET treeview control that needs to be populated recursively from a series of objects. At the minimum, I need to hierarchically display the category name and description for each source and parent node. To this end, I've written the following in my codebehind page:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CATALooK.Automation;

namespace VBayUnMatched  
{
public partial class VBayCats : System.Web.UI.UserControl
{
    private int id;
    private CATALooK.Automation.SourceInfo source;
    private CATALooK.Automation.CategoryInfo parent;
    private string catID;
    private string catName;
    private string desc;
    private string rawData;
    private int advCatID;
    private DateTime lastUpdated;
    protected void Page_Load(object sender, EventArgs e)
    {
        CategoryController cc = new CategoryController();
        CategoryInfo ci = new CategoryInfo
        (id,source,parent,catID,catName,desc,rawData,advCatID,lastUpdated);
        //CATALooK.AdvCatInfoRemote[] acir = cc.getAdvancedCategories();
        TreeView trvUnMatchedCats = new TreeView();
        TreeNodeCollection tnColl = new TreeNodeCollection();
        TreeNode nodeSource = new TreeNode { Value = ToString(source) };
        TreeNode nodeParent = new TreeNode { Value = ToString(parent) };
        TreeNode nodeName = new TreeNode { Value = catName };
    }

    private void PopulateTreeview()
    {


    }

    private string ToString(SourceInfo source)
    {
        throw new NotImplementedException();
    }

    private string ToString(CategoryInfo parent)
    {
        throw new NotImplementedException();
    }

}

}

How do I use recursion to assign parent to nodeParent, source to nodeSource and catName to nodeName?

Thanks much for your help and guidance.

Answer 1

The easiest (and most readable) way is to create a class that implements the IHierarchyData interface. This exposes a node of a hierarchical data structure, including the node object and some properties that describe characteristics of the node. Objects that implement the IHierarchyData interface can be contained in IHierarchicalEnumerable collections, and are used by ASP.NET site navigation (like sitemaps) and data source controls.

a great sample of that is found here and here you see how to create IHierarchyData in a recursive manner