Question

C#中另存为xls格式，用WorkBook.SaveAs

//保存方式一：保存WorkBook
xBook.SaveAs(@"D:\CData.xls",
56，Missing.Value,Missing.Value,Missing.Value,Missing.Value,
Excel.XlSaveAsAccessMode.xlNoChange,Missing.Value,Missing.Value,Missing.Value,
Missing.Value,Missing.Value); C#里面想用这个把xlsx文件转成xls文件，但是每次转之后都还是之前的xlsx格式，第二个参数是fileFormat，但是换之后还是不行

Answer 1

试试这个行吗：

string fileName = @"C:\Users\L-3\Desktop\my.xlsx";
string svfileName = @"C:\Users\L-3\Desktop\ssc\my1.xls";
object oMissing = Type.Missing;
var app = new Microsoft.Office.Interop.Excel.Application();
var wb = app.Workbooks.Open(fileName, oMissing, oMissing,
                oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing);
wb.SaveAs(svfileName, XlFileFormat.xlExcel8, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
app.Quit();

http://stackoverflow.com/questions/15548713/c-sharp-convert-excel-2007-xlsx-file-into-excel-2003-xls-file