How to retrieve the data of the selected row in TreeView containing GtkListStore

[<chenjun1 egr msu edu>]

Hi, dear all,

I'm trying to retrieve the data of the selected row in TreeView containing
GtkListStore.But not succeded. Is it possible to finish this
functionality? Is there something wrong with my code? or will you just
give a example having that functionality.

thanks a lot,

Jun 
 
GtkListStore *fileListStore;
GtkWidget *fileTree;

main()
{

        fileListStore = gtk_list_store_new (1, G_TYPE_STRING);
        
        //insert items into list
        gtk_list_store_append (fileListStore, &fileIter);
        gtk_list_store_set(fileListStore, &fileIter, 0, "spacemusic.sb", -1);
        
        
        fileTree = gtk_tree_view_new();
        gtk_tree_view_set_model(GTK_TREE_VIEW(fileTree),
GTK_TREE_MODEL(fileListStore)); 

        fileRenderer = gtk_cell_renderer_text_new();
        fileColumn = gtk_tree_view_column_new_with_attributes("Name",
fileRenderer,"text",0, NULL);
        gtk_tree_view_append_column(GTK_TREE_VIEW(fileTree), fileColumn);
        gtk_container_add (GTK_CONTAINER (fileScrolledWindow), fileTree);
        gtk_widget_show (fileTree);

}

//button clicked function
{
        GtkTreeSelection* TreeSelection;
        GtkTreeIter iter;
        GtkTreeModel *model;
        TreeSelection = gtk_tree_view_get_selection(GTK_TREE_VIEW(fileTree));
        if(gtk_tree_selection_get_selected (TreeSelection,
                                             &model,
                                             &iter))
        {
                char *str;
                gtk_tree_model_get_value(model, &iter, 
                             0, &str);
                g_print ("%s\n", str);
                g_free (str);
        }


}