I haven't heard of anyone doing this.

Hi McGoldi,



When I used the load-on-demand feature, I created a page that would parse query string parameters and return the correct XML for the nodes requested. In my initial set of nodes, I would build the ContentCallbackUrl string to pass the appropriate query string parameters that would retrieve the correct set of nodes.



private void Page_Load(object sender, System.EventArgs e)

{

if (!IsPostBack)

{

TreeView tree = new TreeView();

// Examine Request.Params collection and build correct nodes

BindTreeData(tree);



Response.Clear();

Response.ContentType = "text/xml";

Response.Write(tree.GetXml());

Response.End();

}

}



However, I ran into some problems with using Forms Authentication with ContentCallbackUrl. In the end, I used an alternative method for doing load-on-demand using the AutoPostBackOnDemand and NodeExpanded event. You can read more about it at http://www.componentart.com/forums/ShowPost.aspx?PostID=2246

Hi Sarah,



Speed depends on a number of factors, such as the source of the data, the efficiency of the code, and whether or not the page performs postbacks. However, loading 6000 nodes at once may take a while, no matter what improvements are made (i.e. caching the data).



I would seriously consider using the TreeView's support for load on demand so that not all 6000 nodes are loaded at once. Take a look at the load on demand demo. You can accomplish load on demand using the TreeViewNode's ContentCallbackUrl property, which does not require postbacks, or use the AutoPostBackOnExpand and the NodeExpanded event to load up additional nodes as needed.

Hi Bryan,



Yes, I have looked at Telerik's products. However, I have only looked at their menu and HTML editor. I was not overly impressed. Also, at the time, I believe they only had domain/site licenses, which is a very sore subject with me. It looks like they have developer licenses now. My opinion, just based on Telerik's demos, is that ComponentArt's TreeView visual interface is far superior. That's what your customers care about. What your developers care about is the API. I don't know about Telerik's API, but ComponentArt's API rocks.



I believe you can do just about anything with TreeView on the client that you can do on the server. Take a look at their online documentation. One of the advantages of ComponentArt is getting the source code. This opens up the door to doing just about anything you wish.



One thing that has impressed me most about ComponentArt's products is that they all share a common base framework for rendering, object models, and so forth. I've looked at it, and it is very solid stuff. I see ComponentArt doing even greater things down the road based on this framework. Read the support forums and you'll catch a glimpse of some of the products and improvements they are thinking about. To me, ComponentArt is a strategic investment.