XML binding to flex2 tree

Problem

When you use XML to bind a tree as a dataprovider, you can use the delete statement to delete the XML node. The tree does not delete the corresponding node.

Solution

After the delete statement is called, update tree. selectedindex. A simple method is to make it equal to itself, that is, point to the previous node of the deleted node.

Function (Event: resultevent): void ...{
VaR ID: Int = tree. selecteditem. @ ID;
Delete courses. courseware. (@ ID = ID) [0];
Tree. selectedindex = tree. selectedindex; // otherwise, the interface is not updated.
If (tree. selecteditem. Name () = "courseware")... {// at this time, selectedindex is the last node to delete a node.
Loadcourseware (tree. selecteditem. @ ID, false );
}
}