C#读取Excel并转化成Xml

XmlDocument excelData = new XmlDocument();
               DataSet excelTableDataSet = new DataSet();
               StreamReader excelContent = new StreamReader(excelFilePath,System.Text.Encoding.Default);
               string stringConnectToExcelFile =string.Format("provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +excelFilePath + ";Extended Properties="Excel 12.0;"");
               System.Data.OleDb.OleDbConnection oleConnectionToExcelFile = newSystem.Data.OleDb.OleDbConnection(stringConnectToExcelFile);
               System.Data.OleDb.OleDbDataAdapter oleDataAdapterForGetExcelTable =new System.Data.OleDb.OleDbDataAdapter(string.Format("select * from[Sheet 1$]"), oleConnectionToExcelFile);
               try
               {
                   oleDataAdapterForGetExcelTable.Fill(excelTableDataSet);
               }
               catch
               {
                   return null;
               }
               string excelOutputXml = Path.GetTempFileName();
               excelTableDataSet.WriteXml(excelOutputXml);
               excelData.Load(excelOutputXml);
               File.Delete(excelOutputXml);
               return excelData;