remove "_" from TextField="#InnerText"

[prefersgolfing]

I'm using an XMLDataSource as a DataSource for a TreeView. In the XML data,
I added "_" between words in order to create elements with them. I want to
get rid of the "_" when the menu presents. How can I edit the TextField
value below to get rid of the "_"?

<asp:Treeview...
<DataBindings>