Dev treelist row location

The previous day, when using the treelist control, I did not know how to add, modify, and locate the deleted row. I have searched the internet for a long time and have not found a proper solution. Later I found that treelist has a findnodebyfieldvalue (string fieldname, object cellvalue) method to find the node of the specified field, after you set the current node of the treelist to the node you are looking for, you can locate it. The following is the main code

Treelistnode = treelistcode. findnodebyfieldvalue ("fguid", fguid );
Treelistcode. focusednode = treelistnode;

If you only want to display a level-1 directory, you can set its expanded attribute to false;

For (INT I = 0; I <treelistcode. nodes. Count; I ++)
{
Treelistcode. nodes [I]. Expanded = false;
}