PDF文本搜索C＃ [英] PDF Text search C#

问题描述

我必须要求阅读PDF文件，然后搜索文本。
我应该显示在页面文本存在和出现的次数。
我可以阅读PDF格式的文本，但我需要知道的页码。

I have requirement to read a pdf file and search for a text. I should display in which page that text exist and the number of occurances. I can read the pdf to text but i need to know the page number.

感谢

推荐答案

您可以使用 Docotic.Pdf 这个（我的奇迹位工作）。

You can use Docotic.Pdf for this (I work for Bit Miracle).

下面是如何搜索的PDF文本的例子：

Here is a sample for how to search text in PDF:

PdfDocument doc = new PdfDocument("file.pdf");
string textToSearch = "some text";
for (int i = 0; i < doc.Pages.Count; i++)
{
    string pageText = doc.Pages[i].GetText();
    int count = 0;
    int lastStartIndex = pageText.IndexOf(textToSearch, 0, StringComparison.CurrentCultureIgnoreCase);
    while (lastStartIndex != -1)
    {
        count++;
        lastStartIndex = pageText.IndexOf(textToSearch, lastStartIndex + 1, StringComparison.CurrentCultureIgnoreCase);
    }

    if (count != 0)
        Console.WriteLine("Page {0}: '{1}' found {2} times", i, textToSearch, count);
}

如果您要执行区分大小写的搜索您可能希望删除第三个参数为的IndexOf 方法。

You may want to remove third argument for IndexOf method if you want to perform case-sensitive search.

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