public void Query()
{
try
{
string first, last;
GetRevisionRange(RevisionRange, out first, out last);
QueryResult = new ResultViewModel(SelectedIndex.Query(QueryText, first, last), SelectedIndex.Path);
}
catch (Exception x)
{
MessageBox.Show(Dump.ExceptionMessage(x), "Search failed", MessageBoxButton.OK, MessageBoxImage.Warning);
}
}