Open an XML file through URL and save it

public static void main( String[] args ) {
  EventQueue.invokeLater( new Runnable() {
    @Override
    public void run() {
      JFileChooser chooser = new JFileChooser(  );
      chooser.setFileSelectionMode( JFileChooser.DIRECTORIES_ONLY );
      chooser.showSaveDialog( null );
      System.out.println( chooser.getSelectedFile() );
    }
  } );
}

private void ConvertToExcel(string srcPath, string outputPath, XlFileFormat format)
{
    if (srcPath== null) { throw new ArgumentNullException("srcPath"); }
    if (outputPath== null) { throw new ArgumentNullException("outputPath"); }

    var excelApp = new Application();
    try
    {
        var wb = excelApp.Workbooks.Open(srcPath);
        try
        {
            wb.SaveAs(outputPath, format);
        }
        finally
        {
            Marshal.ReleaseComObject(wb);
        }
    }
    finally
    {
        excelApp.Quit();
    }
}

//generate excel file from the HTML output of GenerateHtml action.
var generateHtmlUri = new Uri(this.Request.Url, Url.Action("GenerateHtml"));
ConvertToExcel(generateHtmlUri.AbsoluteUri, @"D:\output.xlsx", XlFileFormat.xlOpenXMLStrictWorkbook);