Excel连接

   public static OleDbConnection GetExcleConnection(string viFilePath,string viExcelFileName)
        {
            string nExtension = Path.GetExtension(viExcelFileName);
            if (nExtension != ".xls" && nExtension != ".xlsx")
            {
                throw new Exception("未指定Excel类型");
            }
            else
            {
                string nExcelConn = "";
                if (nExtension == ".xls")
                {
                    // Excel 97-2003
                    nExcelConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Path.Combine(viFilePath, viExcelFileName) + ";Extended Properties='Excel 8.0;HDR=YES;'";
                }
                else
                {
                    // Excel 2007
                    nExcelConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Path.Combine(viFilePath, viExcelFileName) + ";Extended Properties='Excel 12.0 Xml;HDR=YES;'";
                }
                return new OleDbConnection(nExcelConn);
            }

        }
        public static OleDbCommand GetExcelCommand(string viFilePath, string viExcelFileName)
        {
            OleDbCommand nCommand = new OleDbCommand();
            nCommand.Connection = GetExcleConnection(viFilePath, viExcelFileName);
            return nCommand;
        }