如何在c＃中覆盖pdfBox的PDFTextStripper类的writeString方法？

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问题描述

如何在c＃中覆盖pdfBox的PDFTextStripper类的writeString方法？

我想提取pdf文件内容的字体大小和样式使用pdfBox。当我搜索时，我发现我应该覆盖PDFTextStripper类的writeString方法。

我是c＃的新手，我无法实现覆盖。

我使用的代码如下：

How can I override the writeString method of PDFTextStripper class of pdfBox in c#?

I want to extract the font size and style of the contents of a pdf file using pdfBox. When I searched, I found that I should override the writeString method of the PDFTextStripper class.

I am a newbie in c# and I am not able to implement the overriding.

The code that I used is as follows:

PDFTextStripper stripper = new PDFTextStripper(){

protected override void writeString(String text, List<TextPosition> textPositions)
        {
            String prevBaseFont = "";
            StringBuilder builder = new StringBuilder();

            foreach (TextPosition position in textPositions)
            {
                String baseFont = position.getFont().getBaseFont();
                if (baseFont != null && baseFont != (prevBaseFont))
                {
                    builder.Append('[').Append(baseFont).Append(']');
                    prevBaseFont = baseFont;
                }
                builder.Append(position.getCharacter());
            }

            writeString(builder.ToString());
        }

};

请帮助我。

Please help me.

推荐答案

public class MyPDFTextStripper : PDFTextStripper
{
    protected override void writeString(String text, List textPositions)
    {
    }

    // Another option is to hide the original method by using the keyword new
    protected new void writeString(String text, List textPositions)
    {
    }
}

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