有些工具允许提取PDF文件的整个文本部分,以便对PDF进行全文索引。
我需要的是一种搜索某些字符串的方法,如果在PDF文件中找到了该字符串,则返回页码?
答案 0 :(得分:2)
此示例使用Adobe Reader附带的库,来自http://www.dotnetspider.com/resources/5040-Get-PDF-Page-Number.aspx:
using Acrobat;
using AFORMAUTLib;
private void pdfRandD(string fPath)
{
AcroPDDocClass objPages = new AcroPDDocClass();
objPages.Open(fPath);
long TotalPDFPages = objPages.GetNumPages();
objPages.Close();
AcroAVDocClass avDoc = new AcroAVDocClass();
avDoc.Open(fPath, "Title");
IAFormApp formApp = new AFormAppClass();
IFields myFields = (IFields)formApp.Fields;
string searchWord = "Search String";
string k = "";
StreamWriter sw = new
StreamWriter(@"D:\KCG_FileChecker_Inputs\MAC\pdf\0230_525490_23_cha17.txt", false);
for (int p = 0; p < TotalPDFPages; p++)
{
int numWords = int.Parse(myFields.ExecuteThisJavascript("event.value=this.getPageNumWords(" + p + ");"));
k = "";
for (int i = 0; i < numWords; i++)
{
string chkWord = myFields.ExecuteThisJavascript("event.value=this.getPageNthWord(" + p + "," + i + ", true);");
k = k + " " + chkWord;
}
if(k.Trim().Contains(searchWord))
{
int pNum = int.Parse(myFields.ExecuteThisJavascript("event.value=this.getPageLabel(" + p + ",true);"));
sw.WriteLine("The Word " + searchWord + " is exists in " + pNum);
}
}
sw.Close();
MessageBox.Show("Process completed");
}
答案 1 :(得分:2)
您可以使用Docotic.Pdf library搜索PDF文件中的文字。
以下示例显示了如何在PDF文件和相应的页码中查找指定的字符串:
static void searchForTextStrings()
{
string path = "";
string[] stringsToFind = new string[] { };
using (PdfDocument pdf = new PdfDocument(path))
{
for (int i = 0; i < pdf.Pages.Count; i++)
{
string pageText = pdf.Pages[i].GetText();
foreach (string s in stringsToFind)
{
int index = pageText.IndexOf(s, 0, StringComparison.CurrentCultureIgnoreCase);
if (index != -1)
Console.WriteLine("'{0}' found on page {1}", s, i);
}
}
}
}
如果删除IndexOf方法的第三个参数,则可以进行区分大小写的搜索。
免责声明:我为图书馆的供应商Bit Miracle工作。