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      Displaying progress while processing bounces

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      Displaying progress while processing bounces

      When there are too many mail messages to process and your application may take time to process all of them, you may wish to show the progress of the validation to the user. The UltimateBounceInspector component provides progress notification through the Progress event. The Progress event is raised periodically while e-mail validation is in progress, making accessible necessary data to display progress information, such as e-mail address and validation level.

      The following steps show you how to use the Progress event to show progress information while validating e-mail addresses:

      Displaying progress while validating e-mail addresses

      1. Add using directives to your code to create aliases for existing namespaces and avoid having to type the fully qualified type names. The code looks similar to the following: 
        using System;
using ComponentPro.Net.Mail;
      2. Create a new instance of the BounceInspector class and register an event handler to the Progress event. 
        // Create a new instance of the BounceInspector class.
BounceInspector inspector = new BounceInspector();

// Register an event handler.
inspector.Progress += inspector_Progress;
      3. Now pass the path of the directory containing EML files to scan to the ProcessMessages method. The code looks similar to the following: 
        // Process all EML files in directory 'c:\\temp'.
BounceResultCollection result = inspector.ProcessMessages("c:\\temp");

// Display processed emails. 
foreach (BounceResult r in result)
{
    // If this message was identified as a bounced email message. 
    if (r.Identified)
    {
        // Print out the result 
        Console.Write("FileName: {0}\nSubject: {1}\nAddress: {2}\nBounce Category: {3}\nBounce Type: {4}\nDeleted: {5}\nDSN Action: {6}\nDSN Diagnostic Code: {7}\n\n",
                        System.IO.Path.GetFileName(r.FilePath),
                        r.MailMessage.Subject,
                        r.Addresses[0],
                        r.BounceCategory.Name,
                        r.BounceType.Name,
                        r.FileDeleted,
                        r.Dsn.Action,
                        r.Dsn.DiagnosticCode);
    }
}

Console.WriteLine("{0} bounced message found", result.BounceCount);

      Final example code

      using System;
using ComponentPro.Net.Mail;

...

static void Main()
{
    try 
    {
        // Create a new instance of the BounceInspector class. 
        BounceInspector inspector = new BounceInspector();

        // Register an event handler. 
        inspector.Progress += inspector_Progress;

        // Process all EML files in directory 'c:\\temp'. 
        BounceResultCollection result = inspector.ProcessMessages("c:\\temp");

        // Display processed emails. 
        foreach (BounceResult r in result)
        {
            // If this message was identified as a bounced email message. 
            if (r.Identified)
            {
                // Print out the result 
                Console.Write("FileName: {0}\nSubject: {1}\nAddress: {2}\nBounce Category: {3}\nBounce Type: {4}\nDeleted: {5}\nDSN Action: {6}\nDSN Diagnostic Code: {7}\n\n",
                                System.IO.Path.GetFileName(r.FilePath),
                                r.MailMessage.Subject,
                                r.Addresses[0],
                                r.BounceCategory.Name,
                                r.BounceType.Name,
                                r.FileDeleted,
                                r.Dsn.Action,
                                r.Dsn.DiagnosticCode);
            }
        }

        Console.WriteLine("{0} bounced message found", result.BounceCount);
    }
    catch (Exception exc)
    {
        Console.WriteLine(string.Format("An error occurred: {0}", exc.Message));
    }
}

/// <summary> 
/// Handles the BounceInspector's Progress event. 
/// </summary> 
/// <param name="sender">The BounceInspector object.</param> 
/// <param name="e">The event arguments.</param> 
static void inspector_Progress(object sender, ProgressEventArgs e)
{
    Console.WriteLine("{0}/{1} message(s) processed, {2}% completed", e.Current, e.Total, e.Percentage);
}