set_expander_column

Description:

public void set_expander_column (TreeViewColumn? column)

Sets the column to draw the expander arrow at.

It must be in this. If column is null, then the expander arrow is always at the first visible column.

If you do not want expander arrow to appear in your tree, set the expander column to a hidden column.

Parameters:

this

A TreeView
column

null, or the column to draw the expander arrow at.