如何将Checkbox，Textbox和RadioButton放入pdf文件中使用Itextsharp

我想将Checkbox，Textbox和RadioButton控件放在我的pdf文件中，

实际上我制作了一个surevey工具，并希望将此foem转换为pdf文件。





我也试试这个链接。





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但这对我没有帮助。

任何人都可以给我这个建议。

先谢谢。

I want to put Checkbox,Textbox and RadioButton control in my pdf file,
Actually i make a surevey tool and want to convert this foem into pdf file.


I also try with this links.


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but this is no helpful for me.
can anyone give me suggestion for this.?
Thanks in advance.