treeview -- go back to initial state

[YU WU <wuyu_2001 hotmail com>]

dear all,

i have one problem. i have built a treeview modal. it reads data from a file. if i click one column header, 
the treeview is sorted. now, i want to restore the initial state. how can i realize this? one thing at least 
is to make the sort indicator arrow not displayed. but the function "gtk_tree_view_column_get_sort_indicator" 
doesn't work in gtk+2.10.11(my case). what's more, no idea how to go back to the initial state.

any idea?

thank you.

wu yu

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