[Gtk-sharp-list] Query all values from TreeView

[MethodCZ]

Hi,

In the morning i didn't think it will be necessary to ask here, however
after all day which i spent trying to figure how to get values from my
TreeView, i'm kinda hopeless.

My problem is that i have have a TreeView with Model and everything required
where user can add/remove nodes. (it's actually only one level of nodes so
it's not really tree). User can add multiple nodes. This is ok and i had no
problem to wrote that. Problem is that i need to join all the values of all
the nodes into one single string variable. (My treeview has only 1 column)

So for example user adds values "a", "b", "c" and i want to join it into
string val = "abc".

I did some research on this and found few ideas how to do this from using
TreeModel.Foreach function to some suggestions to use Do cycle etc. but none
of them worked :{

Thanks for any ideas :]
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