C＃从FileStream打开Excel工作表文件

Question

I need to open an existing worksheet and using OPENXML tools, modify it, but I don't seem to have the opening down

 // Append a new worksheet and associate it with the workbook.
   XmlDocument doc = new XmlDocument();
   doc.Load(new FileStream(sheetfilename + ".xls", FileMode.Open));
   Sheet sheet;
   //?

Problem with the above is how to take the XML and open it as a Sheet.

Below is another attempt I made earlier to do something similar using a FileStream but I got the error

Cannot convert type System.IO.FileStream to Document.OpenXML.SpreadSheet.Sheet

Sheet sheet = (Sheet)new FileStream(sheetfilename + ".xls",FileMode.Open);

Can I please get some help with this please?

Answer 1

If it's an older, non-OpenXML version of version of Excel you can use NPOI, it's available for download here:

http://npoi.codeplex.com/

HSSFWorkbook workbook;

using (FileStream fs = new FileStream(sheetfilename + ".xls", FileMode.Open, FileAccess.Read))
{
    workbook = new HSSFWorkbook(fs);

    var sheet = workbook.GetSheet("Sheet1");

    ...do something..
}