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ContentDisposition.Parameters Property

Gets the parameters included in the Content-Disposition header represented by this instance.

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

public StringDictionary Parameters { get; }

Property Value

Type: System.Collections.Specialized.StringDictionary
A writable StringDictionary that contains parameter name/value pairs.

Typically, the parameters are determined by the property values so you do not need to access them. If you need to add or change parameter information, modify the dictionary returned by the Parameters property.

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

The following code example displays the parameters that are sent to the Content-Disposition header.

		public static void CreateMessageWithAttachment(string server)
		{
			// Specify the file to be attached and sent. 
			// This example assumes that a file named Data.xls exists in the 
			// current working directory.
			string file = "data.xls";
			// Create a message and set up the recipients.
			MailMessage message = new MailMessage(
			   "jane@contoso.com",
			   "ben@contoso.com",
			   "Quarterly data report.",
			   "See the attached spreadsheet.");

			// Create  the file attachment for this e-mail message.
			Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
			// Add time stamp information for the file.
			ContentDisposition disposition = data.ContentDisposition;
			disposition.CreationDate = System.IO.File.GetCreationTime(file);
			disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
			disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
			// Add the file attachment to this e-mail message.
			message.Attachments.Add(data);

			//Send the message.
			SmtpClient client = new SmtpClient(server);
			// Add credentials if the SMTP server requires them.
			client.Credentials = CredentialCache.DefaultNetworkCredentials;

      try {
			  client.Send(message);
			}
			catch (Exception ex) {
			  Console.WriteLine("Exception caught in CreateMessageWithAttachment(): {0}", 
                    ex.ToString() );			  
			}
			// Display the values in the ContentDisposition for the attachment.
			ContentDisposition cd = data.ContentDisposition;
			Console.WriteLine("Content disposition");
			Console.WriteLine(cd.ToString());
			Console.WriteLine("File {0}", cd.FileName);
			Console.WriteLine("Size {0}", cd.Size);
			Console.WriteLine("Creation {0}", cd.CreationDate);
			Console.WriteLine("Modification {0}", cd.ModificationDate);
			Console.WriteLine("Read {0}", cd.ReadDate);
			Console.WriteLine("Inline {0}", cd.Inline);
			Console.WriteLine("Parameters: {0}", cd.Parameters.Count);
			foreach (DictionaryEntry d in cd.Parameters)
			{
				Console.WriteLine("{0} = {1}", d.Key, d.Value);
			}
			data.Dispose();
		}
public:
    static void CreateMessageWithAttachment(String* server)
    {
        // Specify the file to be attached and sent.
        // This example assumes that a file named Data.xls exists in the
        // current working directory.
        String* file = S"data.xls";
         // Create a message and set up the recipients.
         MailMessage* message = new MailMessage(
            S"jane@contoso.com", 
            S"ben@contoso.com",
            S"Quarterly data report.", 
            S"See the attached spreadsheet.");

        // Create  the file attachment for this e-mail message.
        Attachment* data = new Attachment();
        data->SetContentFromFile(file, 0, MediaTypeNames::Application::Octet);
        // Add time stamp information for the file.
        ContentDisposition* disposition = data->ContentDisposition;
        disposition->CreationDate = System::IO::File::GetCreationTime(file);
        disposition->ModificationDate = System::IO::File::GetLastWriteTime(file);
        disposition->ReadDate = System::IO::File::GetLastAccessTime(file);
        // Add the file attachment to this e-mail message.
        message->Attachments->Add(data);
        //Send the message.
        SmtpClient* client = new SmtpClient(server);
        // Add credentials if the SMTP server requires them.
        client->Credentials = CredentialCache::DefaultNetworkCredentials;
        client->Send(message);
        // Display the values in the ContentDisposition for the attachment.
        ContentDisposition* cd = data->ContentDisposition;
        Console::WriteLine(S"Content disposition");
        Console::WriteLine(cd);
        Console::WriteLine(S"File {0}",cd->FileName);
        Console::WriteLine(S"Size {0}", __box(cd->Size));
        Console::WriteLine(S"Creation {0}", __box(cd->CreationDate));
        Console::WriteLine(S"Modification {0}", __box(cd->ModificationDate));
        Console::WriteLine(S"Read {0}", __box(cd->ReadDate));
        Console::WriteLine(S"Inline {0}", __box(cd->Inline));
        Console::WriteLine(S"Parameters: {0}", __box(cd->Parameters->Count));
        IEnumerator* myEnum1 = cd->Parameters->GetEnumerator();
        while (myEnum1->MoveNext())
        {
            DictionaryEntry* d = __try_cast<DictionaryEntry*>(myEnum1->Current);
            Console::WriteLine(S"{0} = {1}", d->Key, d->Value);
        }
        data->Dispose();
        client->Dispose();
    }

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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