How to generate a sitemap ?(asp.net mvc3) - asp.net

Question

This is my database table
DB Table
how to generate a sitemap?
controller is category
action is Id
that is look like it
Page
TreeMenu.cs:
using System;
using System.Collections.Generic;
namespace Pmvc.Models
{
public partial class TreeMenu
{
public int TreeId { get; set; }
public int TreeParentId { get; set; }
public string TreeName { get; set; }
public List<TreeMenu> Children { get; set; }
}
}
StoreDetailsDynamicNodeProvider.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MvcSiteMapProvider.Extensibility;
using Pmvc.Models;
namespace Pmvc
{
public class StoreDetailsDynamicNodeProvider : DynamicNodeProviderBase
{
PMVCEntities pmvcDB = new PMVCEntities();
public override IEnumerable<DynamicNode> GetDynamicNodeCollection()
{
var nodes = new List<DynamicNode>();
foreach (var treemenu in pmvcDB.TreeMenu)
{
nodes.Add(CreateNode(treemenu));
}
return nodes;
}
private DynamicNode CreateNode(TreeMenu treemenu)
{
DynamicNode node = new DynamicNode();
node.Action = "ProductDetails";
node.Controller = "Product";
node.Title = treemenu.TreeName;
if (treemenu.Children != null)
{
foreach (var child in treemenu.Children)
{
node.Children.Add(CreateNode(child)); //This line is wrong!
}
}
return node;
}
}
}
wrong:
'MvcSiteMapProvider.Extensibility.DynamicNode' is not include 'Children' definition，and not find Extension Methods 'Children'
public class StoreDetailsDynamicNodeProvider : DynamicNodeProviderBase
{
PMVCEntities pmvcDB = new PMVCEntities();
public override IEnumerable<DynamicNode> GetDynamicNodeCollection()
{
// Build value
var returnValue = new List<DynamicNode>();
// Create a node for each album
foreach (var treemenu in pmvcDB.TreeMenu)
{
DynamicNode node = new DynamicNode();
node.Action = "ProductDetails";
node.Controller = "Product";
node.Title = treemenu.TreeName;
node.RouteValues.Add("id", treemenu.TreeId);
returnValue.Add(node);
}
// Return
return returnValue;
}
}
This is my table
TreeId TreeParentId TreeName
1 0 Category 1
2 1 Menu Item X
3 1 Menu Item Y
4 1 Menu Item Z
5 0 Category 2
6 5 Other Menu 1
7 5 Other Menu 2
8 0 Empty Category
9 7 Menu Lvl 3
How do I write child node code?

Answer 1

Take a look at the MvcSitemap provider. It's pretty easy to write a dynamic provider that reads from your database.
Edit - did you read the documentation or attempt to implement anything? Copied almost verbatim from their site:
Within the sitemap config file, add the dynamic node where appropriate:
<mvcSiteMapNode
title="Details"
action="Details"
dynamicNodeProvider="MyProjectName.MyDynamicNodeProvider, MyProjectName" />
Then, write the actual node provider:
public class MyDynamicNodeProvider
: DynamicNodeProviderBase
{
public override IEnumerable<DynamicNode> GetDynamicNodeCollection()
{
// Build value
var returnValue = new List<DynamicNode>();
// ... Here, get values from your database and build up
// the list of nodes. They can be in a tree structure
// too since it appears that's how your data is - just
// build the nodes in that way with sub-lists.
// Return
return returnValue;
}
}
And that's it.
Edit 2 - addressing other answer.
The code that you provided flattens the tree structure. In your original post you showed that you are already able to print the tree structure. Whatever code you had in your view, you can apply the same principles of a depth-first traversal.
Just in case that was a mockup and not actual code, here's some quick psuedo code to demonstrate an depth-first traversal.
public override IEnumerable<DynamicNode> GetDynamicNodeCollection()
{
// Build value
var nodes = new List<DynamicNode>();
// Get all categories without parents.
var rootCategories = db.GetRootCategories();
// Loop all root level categories, creating a node for each and adding
// to the return value.
foreach (var category in rootCategories)
{
nodes.Add(CreateNode(category));
}
return nodes;
}
private DynamicNode CreateNode(Category category)
{
// Create a new node for the category
DynamicNode node = new DynamicNode();
node.Name = category.Name;
// ... set node properties here ...
// If the category has children, then continue down the tree
// and create nodes for them. This will continue recursively
// to the bottom of the tree.
// Note that I'm just guessing on the property names because
// you didn't show us the code for what your entity actually
// looks like. This is why you should always show what code
// you've attempted - you can get better, more precise answers
// instead of complete guesses.
if (category.Children != null)
{
foreach (var child in category.Children)
{
// For each child, recursively branch into them.
node.Children.Add(CreateNode(child));
}
}
return Node;
}
Please note that this is no way tested or researched - it's only to show a tree traversal.