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ContentDisposition.Inline Property

Gets or sets a Boolean value that determines the disposition type (Inline or Attachment) for an e-mail attachment.

Namespace:  System.Net.Mime
Assembly:  System (in System.dll)

public bool Inline { get; set; }

Property Value

Type: System.Boolean
true if content in the attachment is presented inline as part of the e-mail body; otherwise, false.

The Inline property sets the disposition type in the Content-Disposition header sent with the e-mail message. The disposition type can be used by software that displays e-mail to determine the correct way to present the e-mail attachments. Attachments with a disposition type of DispositionTypeNames.Inline are usually displayed when the user opens the e-mail. Attachments with a disposition type of DispositionTypeNames.Attachment are usually not opened until the user performs some additional action, such as clicking an icon that represents the attachment.

The Content-Disposition header is described in RFC 2183 available at http://www.ietf.org.

The following code example demonstrates how to set the value of this property.

		public static void CreateMessageInlineAttachment(string server, string
		textMessage)
		{
			// Create a message and set up the recipients.
			MailMessage message = new MailMessage(
			   "jane@contoso.com",
			   "ben@contoso.com",
			   "An inline text message for you.",
			   "Message: ");

			// Attach the message string to this e-mail message.
			Attachment data = new Attachment(textMessage, MediaTypeNames.Text.Plain);
			// Send textMessage as part of the e-mail body.
			message.Attachments.Add(data);
			ContentDisposition disposition = data.ContentDisposition;
			disposition.Inline = true;
			//Send the message. 
			// Include credentials if the server requires them.
			SmtpClient client = new SmtpClient(server);
			client.Credentials = CredentialCache.DefaultNetworkCredentials;

	    try {
        client.Send(message);
      }
      catch (Exception ex) {
        Console.WriteLine("Exception caught in CreateMessageInlineAttachment: {0}", 
                    ex.ToString() );
      }
			data.Dispose();
		}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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