C# iTextSharp列表项不同字体'；问题

我需要使用iTextSharp在我的PDF上显示这样的文本

" 提高学习和记忆能力的建议

•集中注意力：为了记住一些东西，你需要学习它。只有当你足够注意它时，学习才有可能。只有当你在学习时集中注意力时，你才能将信息保留更长的时间

•尽可能多地使用感官：重写信息的物理行为有助于将其印在大脑中。即使你是视觉学习者，也要大声朗读你想记住的内容。如果你能有节奏地背诵，效果会更好。 "

我试着用手来做这件事

ListItem firstRecommend = new ListItem(new Chunk("Concentrate:", new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.BOLD, BaseColor.BLUE)));
            firstRecommend.Add(new Chunk("In order to remember something you need to learn it. Learning is possible only if you pay enough attention to it. You will retain information for a longer period of time only if you concentrate properly at the time of learning."
                                , new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.NORMAL, BaseColor.BLUE)));
            recommendationList.Add(firstRecommend);

但它不起作用，整个文本是粗体而不是部分粗体

这也不起作用

ListItem FirstRecommendable=新的ListItem（新的区块（“浓缩：”，新字体（iTextSharp.text.Font.FontFamily.TIMES_-ROMAN，11，Font.BOLD，BaseColor.BLUE））； firstrecomment.Chunks.Add（新Chunk）（“为了记住你需要学习的东西，只有当你足够注意它时，学习才有可能。只有当你在学习时集中注意力时，你才能将信息保留更长的时间。” ，新字体（iTextSharp.text.Font.FontFamily.TIMES_ROMAN，11，Font.NORMAL，BaseColor.BLUE））； 推荐列表。添加（首次推荐）

pdf上只显示粗体部分，因为我注意到ListItem.Chunks是只读的

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如何使其工作？？？

您可以尝试先创建一个段落，然后将其添加到列表项中

请参阅下面的代码

    Chunk c1 = new Chunk("Concentrate:", new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.BOLD, BaseColor.BLUE)));
    Chunk c2 = new Chunk("In order to remember something you need to learn it. Learning is possible only if you pay enough attention to it. You will retain information for a longer period of time only if you concentrate properly at the time of learning.", new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.NORMAL, BaseColor.BLUE)));

    Pharagraph p2 = new Pharagraph();
    p2.Add(c1);
    p2.Add(c2);

    ListItem firstRecommend = new ListItem(p2);

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您可以尝试先创建一个段落，然后将其添加到listitem

请参阅下面的代码

    Chunk c1 = new Chunk("Concentrate:", new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.BOLD, BaseColor.BLUE)));
    Chunk c2 = new Chunk("In order to remember something you need to learn it. Learning is possible only if you pay enough attention to it. You will retain information for a longer period of time only if you concentrate properly at the time of learning.", new Font(iTextSharp.text.Font.FontFamily.TIMES_ROMAN, 11, Font.NORMAL, BaseColor.BLUE)));

    Pharagraph p2 = new Pharagraph();
    p2.Add(c1);
    p2.Add(c2);

    ListItem firstRecommend = new ListItem(p2);