如何阅读选定的Excel列

使用http://exceldatareader.codeplex.com的ExcelDataReader和以下代码：

Dim stream As FileStream = File.Open(filePath, FileMode.Open, FileAccess.Read) '1. Reading from a binary Excel file ('97-2003 format; *.xls) Dim excelReader As IExcelDataReader = ExcelReaderFactory.CreateBinaryReader(stream) '... '2. Reading from a OpenXml Excel file (2007 format; *.xlsx) Dim excelReader As IExcelDataReader = ExcelReaderFactory.CreateOpenXmlReader(stream) '... '3. DataSet - The result of each spreadsheet will be created in the result.Tables Dim result As DataSet = excelReader.AsDataSet() '... '4. DataSet - Create column names from first row excelReader.IsFirstRowAsColumnNames = True Dim result As DataSet = excelReader.AsDataSet() '5. Data Reader methods While excelReader.Read() 'excelReader.GetInt32(0); End While '6. Free resources (IExcelDataReader is IDisposable) excelReader.Close() 

如何阅读选定的excel列？ 谢谢。