Hi,

Thanks for posting in the forum. I believe that behavior is by design. AutoCheckChildren, AutoCheckParent and AutoUncheckChildren only applies when a user click the node to check/uncheck it. It does not apply when you check/uncheck a node by code.

The reason that is implemented this way is to allow user to have full control over which node can be checked/unchecked when they do it through code. The idea is, if you choose to do it through code, most of the time you do not want to have limitations. If we were to automatically apply those AutoXXX properties there, then some users who want to use those properties, but want to have some special checking patterns on certain nodes (for example, for most items automatically checks parent item, but for one item he doesn't want to) would find out their design is simply not possible. On the other hand, pretty much everything is possible with the current design.

Another reason that these properties are ignored when setting Checked through code is that the sequence of checking/uncheck matters a lot. For example, with all those property set, when user check the parent node manually and then click a child node, the result is all nodes are checked, except for the single child node that was last clicked. However the result would be totally different if user were to click the child node first and then click the parent node. Such difference is very easy to understand when user does it manually because he/she can have immediately visual feedback from the TreeView. However if the same logics are applied when setting through code, many programmers can easily get confused within a few steps. So we decided to keep it simple: You get what you set, nothing more and nothing less.

The drawback of the current design is that, you may need to write a little bit more code to check the check state of a few more items (parent item, child items, etc) in order to decide whether to proceed with your specific business logic. But those code should be fairly easy.

Please feel free to let us know if you have any problems or questions.

Thanks