Office 2007的Microsoft.Office.Interop.Excel

我想尝试将Office文件（Excel，Word，Powerpoint）转换为PDF文件的Windows窗体应用程序。我的客户的PC不会安装Visual Studio，而Office版本是2007。我的应用程序用于Microsoft.Office.Iterop.Excel.dll隐藏PDF格式。在我的客户端的PC上找不到该dll文件，并且发生了如下错误。

System.AugumentException: Value does not fall within the expected range.
at Microsoft.Office.Interop.Excel._Workbook.ExportAsFixedFromat(.......)

我怎么解决这个问题？

我的代码如下

public bool ExportWorkbookToPdf(string workbookPath, string outputPath)
        {
            // If either required string is null or empty, stop and bail out
            if (string.IsNullOrEmpty(workbookPath) || string.IsNullOrEmpty(outputPath))
            {
                return false;
            }

            // Create COM Objects
            Microsoft.Office.Interop.Excel.Application excelApplication;
            Microsoft.Office.Interop.Excel.Workbook excelWorkbook;

            // Create new instance of Excel
            excelApplication = new Microsoft.Office.Interop.Excel.Application();

            // Make the process invisible to the user
            excelApplication.ScreenUpdating = false;

            // Make the process silent
            excelApplication.DisplayAlerts = false;

            // Open the workbook that you wish to export to PDF
            excelWorkbook = excelApplication.Workbooks.Open(workbookPath);

            MessageBox.Show(workbookPath);
            // If the workbook failed to open, stop, clean up, and bail out
            if (excelWorkbook == null)
            {
                excelApplication.Quit();

                excelApplication = null;
                excelWorkbook = null;
                MessageBox.Show("in null");
                return false;
            }

            var exportSuccessful = true;
            try
            {
                // Call Excel's native export function (valid in Office 2007 and Office 2010, AFAIK)
                excelWorkbook.ExportAsFixedFormat(Microsoft.Office.Interop.Excel.XlFixedFormatType.xlTypePDF, outputPath);
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message);
                // Mark the export as failed for the return value...
                exportSuccessful = false;

                // Do something with any exceptions here, if you wish...
                // MessageBox.Show...        
            }
            finally
            {
                // Close the workbook, quit the Excel, and clean up regardless of the results...
                excelWorkbook.Close();
                excelApplication.Quit();

                excelApplication = null;
                excelWorkbook = null;
            }

            // You can use the following method to automatically open the PDF after export if you wish
            // Make sure that the file actually exists first...
            if (System.IO.File.Exists(outputPath))
            {
                MessageBox.Show(outputPath);
                System.Diagnostics.Process.Start(outputPath);
            }

            return exportSuccessful;
        }