selection ??

hello everyone

I have a question about selection.

template_path =
"#{get_plugin_root}/public/converter/templates/#{params[:template]}.xml"
converter_generate(sheet_id,date, output_path, template_path)

template_path argument of the method is taken from selection. least I
want to do it.
my selection is like

<select value=[:template]>
    <option value="csv" id="work_sheet_csv">csv</option>
    <option value="template_of_roster">template_of_roster</option>
    <option value="template_of_roster1">template_of_roster1</option>
    <option value="template_of_roster2">template_of_roster2</option>
    <option value="template_of_roster3">template_of_roster3</option>
  </select>
in the view page.
how can I add the selected value to my params[:template].