问题
I need to convert a .pdf file to a .txt file (or .doc, but I prefer .txt).
How can I do this in C#?
回答1:
Ghostscript could do what you need. Below is a command for extracting text from a pdf file into a txt file (you can run it from a command line to test if it works for you):
gswin32c.exe -q -dNODISPLAY -dSAFER -dDELAYBIND -dWRITESYSTEMDICT -dSIMPLE -c save -f ps2ascii.ps "test.pdf" -c quit >"test.txt"
Check here: codeproject: Convert PDF to Image Using Ghostscript API for details on how to use ghostscript with C#
回答2:
I've had the need myself and I used this article to get me started: http://www.codeproject.com/KB/string/pdf2text.aspx
回答3:
The concept of converting PDF to text is not really straight forward and you wont see anyone posting a code here that will convert PDF to text straight. So your best bet now is to use a library that would do the job for you... a good one is PDFBox, you can google it. You'll probably find it written in java but fortunately you can use IKVM to convert it to .Net....
回答4:
As an alternative to Don's solution there I found the following:
Extract Text from PDF in C# (100% .NET)
回答5:
Docotic.Pdf library can extract text from PDF files (formatted or not).
Here is a sample code that shows how to extract formatted text from a PDF file and save it to an other file.
public static void ExtractFormattedText(string pdfFile, string textFile)
{
using (PdfDocument doc = new PdfDocument(pdfFile))
{
string text = doc.GetTextWithFormatting();
File.WriteAllText(textFile, text);
}
}
Also, there is a sample on our site that shows other options for extraction of text from PDF files.
Disclaimer: I work for Bit Miracle, vendor of the library.
回答6:
public void PDF_TEXT()
{
richTextBox1.Text = string.Empty;
ReadPdfFile(@"C:\Myfile.pdf"); //read pdf file from location
}
public void ReadPdfFile(string fileName)
{
string strText = string.Empty;
StringBuilder text = new StringBuilder();
try
{
PdfReader reader = new PdfReader((string)fileName);
if (File.Exists(fileName))
{
PdfReader pdfReader = new PdfReader(fileName);
for (int page = 1; page <= pdfReader.NumberOfPages; page++)
{
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(pdfReader, page, strategy);
text.Append(currentText);
}
pdfReader.Close();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
richTextBox1.Text = text.ToString();
}
private void Save_TextFile_Click(object sender, EventArgs e)
{
SaveFileDialog sfd = new SaveFileDialog();
DialogResult messageResult = MessageBox.Show("Save this file into Text?", "Text File", MessageBoxButtons.OKCancel);
if (messageResult == DialogResult.Cancel)
{
}
else
{
sfd.Title = "Save As Textfile";
sfd.InitialDirectory = @"C:\";
sfd.Filter = "TextDocuments|*.txt";
if (sfd.ShowDialog() == DialogResult.OK)
{
if (richTextBox1.Text != "")
{
richTextBox1.SaveFile(sfd.FileName, RichTextBoxStreamType.PlainText);
richTextBox1.Text = "";
MessageBox.Show("Text Saved Succesfully", "Text File");
}
else
{
MessageBox.Show("Please Upload Your Pdf", "Text File",
MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk);
}
}
}
}
来源：https://stackoverflow.com/questions/1944576/convert-a-pdf-file-to-text-in-c-sharp