c# 将xml格式的Excel文件转换为标准的Excel

public static void ConvertExcel(string savePath)
    {
        //将xml文件转换为标准的Excel格式 
        Object Nothing = Missing.Value;//由于yongCOM组件很多值需要用Missing.Value代替   
        Excel.Application ExclApp = new Excel.ApplicationClass();// 初始化
        Excel.Workbook ExclDoc = ExclApp.Workbooks.Open(savePath, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing);//打开Excl工作薄   
        try
        {
            Object format = Excel.XlFileFormat.xlWorkbookNormal;//获取Excl 2007文件格式   
            ExclApp.DisplayAlerts = false;
            ExclDoc.SaveAs(savePath, format, Nothing, Nothing, Nothing, Nothing, Excel.XlSaveAsAccessMode.xlExclusive, Nothing, Nothing, Nothing, Nothing, Nothing);//保存为Excl 2007格式   
        }
        catch (Exception ex) { }
        ExclDoc.Close(Nothing, Nothing, Nothing);
        ExclApp.Quit();