包含非强类型数据的列
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如果工作表的所有列中的值都不是强类型的（这意味着列中的值可能具有不同的数据类型），那么我们可以通过调用Cells类的ExportDataTableAsString方法导出工作表内容。ExportDataTableAsString方法使用与ExportDataTable方法相同的一组参数将工作表数据导出为DataTable对象。
//Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream(FOD_OpenFile.FileName, FileMode.Open);
//Instantiating a Workbook object
//Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);
//Accessing the first worksheet in the Excel file
Worksheet worksheet = workbook.Worksheets[0];
//Exporting the contents of 2 rows and 2 columns starting from 1st cell to DataTable
DataTable dataTable = worksheet.Cells.ExportDataTableAsString(0, 0, 2, 2, true);
//Binding the DataTable with DataGrid
dataGridView2.DataSource = dataTable;
//Closing the file stream to free all resources
fstream.Close();
以下是屏幕截图：
