private void InitGridViewHeader()
{
DataTable dtStation = Station.GetStation(DBConnection);
for (int r = FixedColCount; r <= StationList.Split(',').Length + (FixedColCount - 1); r++)
{
ToolUtility tool = new ToolUtility();
string descr = tool.GetStationDescr(dtStation, gvQuery.HeaderRow.Cells[r].Text.Trim());
string tip = tool.GetTipString(descr);
gvQuery.HeaderRow.Cells[r].Attributes.Add("onmouseover", tip);
gvQuery.HeaderRow.Cells[r].Attributes.Add("onmouseout", "UnTip()");
}
}