Extract Text From Page Region In PDF File
This tutorial will guide you through the process of extracting text from a specific region on a page in PDF file using Aspose.PDF for .NET. The provided C# source code demonstrates the necessary steps.
Requirements
Before you begin, ensure that you have the following:
- Visual Studio or any other C# compiler installed on your machine.
- Aspose.PDF for .NET library. You can download it from the official Aspose website or use a package manager like NuGet to install it.
Step 1: Set up the project
- Create a new C# project in your preferred development environment.
- Add a reference to the Aspose.PDF for .NET library.
Step 2: Import required namespaces
In the code file where you want to extract text, add the following using directives at the top of the file:
using Aspose.Pdf;
using System.IO;
Step 3: Set the document directory
In the code, locate the line that says string dataDir = "YOUR DOCUMENT DIRECTORY"; and replace "YOUR DOCUMENT DIRECTORY" with the path to the directory where your documents are stored.
Step 4: Open the PDF document
Open an existing PDF document using the Document constructor and passing the path to the input PDF file.
Document pdfDocument = new Document(dataDir + "ExtractTextAll.pdf");
Step 5: Extract text from a page region
Create a TextAbsorber object to extract text from the document. Configure the TextSearchOptions to limit the search to a specific page region defined by a rectangle.
TextAbsorber absorb = new TextAbsorber();
absorb.TextSearchOptions.LimitToPageBounds = true;
absorb.TextSearchOptions.Rectangle = new Aspose.Pdf.Rectangle(100, 200, 250, 350);
pdfDocument.Pages[1].Accept(absorb);
Step 6: Get the extracted text
Access the extracted text from the TextAbsorber object.
string extractedText = absorb.Text;
Step 7: Save the extracted text
Create a TextWriter and open the file where you want to save the extracted text. Write the extracted text to the file and close the stream.
TextWriter tw = new StreamWriter(dataDir + "extracted-text.txt");
tw.WriteLine(extractedText);
tw. Close();
Sample source code for Extract Text From Page Region using Aspose.PDF for .NET
// The path to the documents directory.
string dataDir = "YOUR DOCUMENT DIRECTORY";
// Open document
Document pdfDocument = new Document(dataDir + "ExtractTextAll.pdf");
// Create TextAbsorber object to extract text
TextAbsorber absorber = new TextAbsorber();
absorber.TextSearchOptions.LimitToPageBounds = true;
absorber.TextSearchOptions.Rectangle = new Aspose.Pdf.Rectangle(100, 200, 250, 350);
// Accept the absorber for first page
pdfDocument.Pages[1].Accept(absorber);
// Get the extracted text
string extractedText = absorber.Text;
// Create a writer and open the file
TextWriter tw = new StreamWriter(dataDir + "extracted-text.txt");
// Write a line of text to the file
tw.WriteLine(extractedText);
// Close the stream
tw.Close();
Conclusion
You have successfully extracted text from a specific region on a page of a PDF document using Aspose.PDF for .NET. The extracted text has been saved to the specified output file.
FAQ’s
Q: What is the purpose of this tutorial?
A: This tutorial aims to guide you through the process of extracting text from a specific region on a page in a PDF file using Aspose.PDF for .NET. The accompanying C# source code provides step-by-step instructions for accomplishing this task.
Q: What namespaces should I import?
A: In the code file where you intend to extract text, include the following using directives at the beginning of the file:
using Aspose.Pdf;
using System.IO;
Q: How do I specify the document directory?
A: Locate the line string dataDir = "YOUR DOCUMENT DIRECTORY"; in the code and replace "YOUR DOCUMENT DIRECTORY" with the actual path to your document directory.
Q: How do I open an existing PDF document?
A: In Step 4, you’ll open an existing PDF document using the Document constructor and providing the path to the input PDF file.
Q: How do I extract text from a specific page region?
A: Step 5 involves creating a TextAbsorber object to extract text from the PDF document. You’ll then configure the TextSearchOptions to define a specific rectangular region on the page using coordinates.
Q: How do I access the extracted text?
A: Step 6 guides you through accessing the extracted text from the TextAbsorber object.
Q: How do I save the extracted text to a file?
A: In Step 7, you’ll create a TextWriter, open the file where you want to save the extracted text, write the extracted text to the file, and then close the stream.
Q: What is the key takeaway from this tutorial?
A: By following this tutorial, you’ve learned how to extract text from a specific region on a page of a PDF document using Aspose.PDF for .NET. The extracted text has been saved to a specified output file, allowing you to precisely target and analyze the desired textual content.
