GroupDocs.Parser for .NET 18.9 Release Notes

Major Features

There are the following features in this release:

  • Ability to extract a text from databases
  • Ability to extract data from PDF Forms

Full List of Issues Covering all Changes in this Release

KeySummaryIssue Type
PARSERNET-555Implement the ability to extract a text from databasesNew feature
PARSERNET-975Implement the ability to extract data from the form fields of PDFsNew feature

Public API and Backward Incompatible Changes

Ability to extract a text from databases


This feature allows extracting a text from databases.

Public API changes

  • Added DbContainer class
  • Added DbTableReader class


To extract a text from databases DbContainer class is used. DbContainer class implements IContainer interface. Each data table is represented by the entity. The content of the entity is CSV-presentation of data table. For more detailed text extraction GetTableReader method is used. Also, this method is faster and consumes less memory. GetTableReader method returns an instance of DbTableReader class.

DbTableReader class has the following members:

Read()Reads the next data row and returns a collection of row cells
ReadLine()Reads the next data row and returns a string representation of comma-separated values
ColumnsFilterGets or sets a collection of columns names which are returned by Read and ReadLine methods; null if all table columns are returned
ColumnsGets a collection of table columns names

Using DbContainer as a container:


// Create a container
using (var container = new DbContainer(new SQLiteConnection(connectionString)))
    // Iterate over entities 
    foreach (var entity in container.Entities)
        // Print a table name
        // Print a media type
        // Create a stream reader for CSV document: OpenStream method converts a table to the CSV file and returns it as Stream
        using (var reader = new StreamReader(entity.OpenStream()))
            // Read a line
            string line = reader.ReadLine();
            // Loop to the end of the file
            while (line != null)
                // Print a line from the document
                // Read the next line
                line = reader.ReadLine();

Ability to extract data from the form fields of PDFs


This feature allows extracting data from PDF Forms.

Public API changes

  • Added GetFormData method to PdfTextExtractor class



// Create a text extractor
using (var extractor = new PdfTextExtractor(fileName))
    // Extract forms data
    var fields = extractor.GetFormData();
    // Iterate over fields
    foreach (var f in fields)
        // Print field name and value
        System.Console.WriteLine(string.Format("{0}: {1}", f.Key, f.Value));