iTextSharp的PDFTemplate FormFlattening移除填充数据 [英] ITextSharp PDFTemplate FormFlattening removes filled data

问题描述

我移植从Java到C＃现有的应用程序。原来的应用程序使用的iText库填写PDF表单模板，并将其保存为新的PDF的。我的C＃代码（例如）如下：

I am porting an existing app from Java to C#. The original app used the IText library to fill PDF form templates and save them as new PDF's. My C# code (example) below:

string templateFilename = @"C:\Templates\test.pdf"; 
string outputFilename = @"C:\Output\demo.pdf";

using (var existingFileStream = new FileStream(templateFilename, FileMode.Open))
{
    using (var newFileStream = new FileStream(outputFilename, FileMode.Create))
    {
        var pdfReader = new PdfReader(existingFileStream);
        var stamper = new PdfStamper(pdfReader, newFileStream);

        var form = stamper.AcroFields;
        var fieldKeys = form.Fields.Keys;

        foreach (string fieldKey in fieldKeys)
        {
            form.SetField(fieldKey, "REPLACED!");
        }

        stamper.FormFlattening = true;
        stamper.Close();
        pdfReader.Close();
    }
}

所有只有行之有效的，如果我ommit了。

All works well only if I ommit the

stamper.FormFlattening = true;

行，但随后的形式是可见的...的形式。
当我添加了这条线，设置为窗体字段的任何值都将丢失，从而导致一个空白窗体。我真的很感激的任何建议。

line, but then the forms are visible as...forms. When I add the this line, any values set to the form fields are lost, resulting in a blank form. I would really appreciate any advice.

推荐答案

解决使用iTextSharp的以前的版本（5.4.3）的问题。不知道其中的原因，但...

Resolved the issue by using a previous version of ITextSharp (5.4.3). Not sure what the cause is though...

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