Logging

ILogger interface is used to receive the information about errors, warnings and events which occur while data extraction. ILogger interface has the following members:

MemberDescription
Error(string, Exception)Logs an error that occurred during data extraction.
Warning(string)Logs a warning that occurred during data extraction.
Trace(string)Logs an event occurred during data extraction.

Here are the steps to receive the information via ILogger interface:

The following example shows how to receive the information via ILogger interface.

try
{
    // Create an instance of Logger class
    Logger logger = new Logger();
    // Create an instance of Parser class with the parser settings
    using (Parser parser = new Parser(Constants.SamplePassword, null, new ParserSettings(logger)))
    {
        // Check if text extraction is supported
        if (!parser.Features.Text)
        {
            Console.WriteLine("Text extraction isn't supported.");
            return;
        }
        // Print the document text
        using (TextReader reader = parser.GetText())
        {
            Console.WriteLine(reader.ReadToEnd());
        }
    }
}
catch (InvalidPasswordException)
{
    ; // Ignore the exception
}

private class Logger : ILogger
{
    public void Error(string message, Exception exception)
    {
        // Print error message
        Console.WriteLine("Error: " + message);
    }
    public void Trace(string message)
    {
        // Print event message
        Console.WriteLine("Event: " + message);
    }
    public void Warning(string message)
    {
        // Print warning message
        Console.WriteLine("Warning: " + message);
    }
}

More resources

GitHub examples

You may easily run the code above and see the feature in action in our GitHub examples:

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