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:
| Member | Description |
|---|---|
| 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:
- Implement the class with ILogger interface implementation;
- Instantiate Parser object with ParserSettings object.
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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