一些有用的dll

1.生成excel工具- EPPlus
EPPlus.dll

2.生成word工具 - OpenXml
DocumentFormat.OpenXml.dll

3.生成条形码工具 -  ZXing
zxing.dll
zxing.presentation.dll

 https://zxingnet.codeplex.com/

http://www.cnblogs.com/tuyile006/archive/2013/01/16/2863367.html

4.生成加密PDF - Foxit PDF Merger(须付费)

http://www.foxitsoftware.com/products/sdk/merger/pricing.php

5.生成加密PDF - iTextSharp (须付费)

http://itextpdf.com/pricing/server_license

6.fastJson
http://github.com/kamranayub/fastJSON

string str = fastJSON.JSON.Instance.ToJSON(obj);
object obj = fastJSON.JSON.Instance.ToObject(str);

7.Json.NET
http://james.newtonking.com/json