Availability of PR_HTML Property in MapiMessage and MailMessage

Aspose.Email Product Family
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1

When we construct a MapiMessage, set PR_HTML property, and send the message to the target, PR_HTML property is available.

Message construction example:

 using (MapiMessage mapiMessage = new MapiMessage())
                    {
                        mapiMessage.Subject = "test";
                        mapiMessage.Body = "test bodyy";
                        mapiMessage.SetProperty(new MapiProperty(MapiPropertyTag.PR_HTML, Encoding.Unicode.GetBytes(byteArray)));
                        
                        if (mapiMessage.Properties.ContainsKey(MapiPropertyTag.PR_HTML))// this condition is true
                        {
                            
                        }
                    }

When we construct a MapiMessage from MailMessage using FromMailMessage(mailMessage), set PR_HTML property, and send the message to the target, PR_HTML property is NOT available.

Message construction example:

 using (var ms = new MemoryStream(byteArray))
						{
							using (MailMessage mailMessage = MailMessage.Load(ms))
							{
								using (MapiMessage mapiMessage = MapiMessage.FromMailMessage(mailMessage))
								{
									mapiMessage.SetProperty(new MapiProperty(MapiPropertyTag.PR_HTML, byteArray));

									if (mapiMessage.Properties.ContainsKey(MapiPropertyTag.PR_HTML))// this condition is true
									{

									}

								}
							}
						}

Why PR_HTML property is available in the first case, while NOT available in the second one?

2

@merge1,
Welcome to our community! Thank you for posting the query. Unfortunately, I cannot use your code snippets containing the unknown symbol byteArray to investigate the issue on our side. Please share a comprehensive code example and email file (if the file is required) to investigate the problem.

3

Hi,

Thanks for the response.
Please see below the code snippets which describe the issue more accurately.

MapiMessage construction example 1:
using (MapiMessage mapiMessage = new MapiMessage())
{
mapiMessage.Subject = “test”;
mapiMessage.Body = “test bodyy”;
mapiMessage.SetProperty(new MapiProperty(MapiPropertyTag.PR_HTML, Encoding.Unicode.GetBytes(htmlBody)));

                    if (mapiMessage.Properties.ContainsKey(MapiPropertyTag.PR_HTML))// this condition is true
                    {
                        
                    }
                }

MapiMessage construction example 2:
using (var ms = new MemoryStream(byteArray))
{
using (MailMessage mailMessage = MailMessage.Load(ms))
{
using (MapiMessage mapiMessage = MapiMessage.FromMailMessage(mailMessage))
{
mapiMessage.SetProperty(new MapiProperty(MapiPropertyTag.PR_HTML, Encoding.Unicode.GetBytes(htmlBody)));

								if (mapiMessage.Properties.ContainsKey(MapiPropertyTag.PR_HTML))// this condition is true
								{

								}

							}
						}
					}

I also attach the file. You can use this file represented by byteArray to investigate the issue.

message.zip (30.8 KB)

4

@merge1,
Thank you for the EML file. Unfortunately, I cannot use your code snippets containing the unknown symbol htmlBody. You should share complete code examples so that we can help you.