Need a VERY fast tree

DarrollWalsh

Hey guys, I'm writing an ASP.NET C# web application that needs to quickly (as possible) display trees that are on the order of thousands of nodes. I know there are commercial solutions out there but have been directed that they are off limits. I have also been told that freeware versions are also a no go. This is partly due to the legalities of using them as well as customer direction. I've tried building the nodes on the fly but my implementation didn't seem to speed up the rendering of the tree. It just seems like the tree control that is included is very bloated and was not built for VERY large trees. If you can point me into the right direction I would appreciate it. Thanks to everyone! This site rocks!

- Darroll

Christian Graus

http://www.obout.com/t2/eServerSideEvents.aspx[^] I've used it, and it works well. They say it's the fastest on the market, but then, they would :-)

Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Pete OHanlon

How deep are you going with your nodes? It's common to just retrieve nodes down to the next depth and then when expanding a node, get the nodes two layers down from that. This means that the user sees the nodes that can be expanded. Here's a quick example:

Now, imagine that you are expanding the first Level 1 node, you retrieve the nodes below Level 2 so that the user sees the appropriate visual cues:

As you can see, you only get the information that you need so that you can keep the user happy. I hope that helps.

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