iTextSharp按钮字段的多个动作 [英] iTextSharp multiple actions for pushbuttonfield

问题描述

在PDF中，我可以设置一个按钮

In a PDF, I can set up a button to

1. 将FDF数据提交给我的RestAPI


2. 重定向到网页（告诉用户'谢谢'）并且效果很好。

但我需要这样做使用代码......我使用以下方式使用iTextSharp：

But I need to do this using code... I am using iTextSharp in the following way:

• pb 是我的按钮...


• sURL 是我需要数据去的网址...

• pb is my pushbutton...
• sURL is the URL I need the data to go to...

这是我的代码：

PdfFormField pff = pb.Field;
pff.SetAdditionalActions(PdfName.A, PdfAction.CreateSubmitForm(sURL, null, PdfAction.SUBMIT_XFDF));
af.ReplacePushbuttonField("submit", pff);

这确实用提交操作替换了按钮。如何保持页面重定向或如何在代码中设置？
我也尝试过基于示例的 PdfName.AA 和 PdfName.U 我不确定是什么不同的名字是为了。但没有任何作用。 ： - /

This does replace the button with the submit action. How do I keep the page redirect or how do I set it in code? I have also tried PdfName.AA and PdfName.U based on examples and I am not certain what the different names are for. But nothing works. :-/

显然， SetAdditionalActions（）会替换现有的操作。

Apparently, the SetAdditionalActions() replaces the existing actions.

我也尝试过使用注释，只添加一个不存在的按钮。

I have also tried using annotations and just adding a button that doesn't exist.

推荐答案

你正在寻找一个名为链式动作的概念，如 PrintTimeTable 示例：

You are looking for a concept called chained actions as demonstrated in the PrintTimeTable example:

Chunk chunk = new Chunk("print this page");
PdfAction action = PdfAction.javaScript(
    "app.alert('Think before you print!');", stamper.getWriter());
action.next(PdfAction.javaScript(
    "printCurrentPage(this.pageNum);", stamper.getWriter()));
action.next(new PdfAction("http://www.panda.org/savepaper/"));
chunk.setAction(action);

在这种情况下，我们有一个动作，显示警告，打印页面并重定向到URL 。这些操作使用 next（）方法相互链接。

In this case, we have an action that shows an alert, prints a page and redirects to an URL. These actions are chained to each other using the next() method.

在C＃中，这将是：

Chunk chunk = new Chunk("print this page");
PdfAction action = PdfAction.JavaScript("app.alert('Think before you print!');", stamper.Writer);
action.Next(PdfAction.JavaScript("printCurrentPage(this.pageNum);", stamper.Writer));
action.Next(new PdfAction("http://www.panda.org/savepaper/"));
chunk.SetAction(action);

另见图书示例的C＃端口。

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