ContentType.Parameters Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the dictionary that contains the parameters included in the Content-Type header represented by this instance.
public:
property System::Collections::Specialized::StringDictionary ^ Parameters { System::Collections::Specialized::StringDictionary ^ get(); };public System.Collections.Specialized.StringDictionary Parameters { get; }member this.Parameters : System.Collections.Specialized.StringDictionaryPublic ReadOnly Property Parameters As StringDictionaryProperty Value
A writable StringDictionary that contains name and value pairs.
Examples
The following code example displays the values in the dictionary returned by this property.
static void CreateMessageWithMultipleViews( String^ server, String^ recipients )
{
// Create a message and set up the recipients.
MailMessage^ message = gcnew MailMessage( L"jane@contoso.com",recipients,L"This email message has multiple views.",L"This is some plain text." );
// Construct the alternate body as HTML.
String^ body = L"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";
body = String::Concat( body, L"<HTML><HEAD><META http-equiv=Content-Type content=\"text/html; charset=iso-8859-1\">" );
body = String::Concat( body, L"</HEAD><BODY><DIV><FONT face=Arial color=#ff0000 size=2>this is some HTML text" );
body = String::Concat( body, L"</FONT></DIV></BODY></HTML>" );
// Add the alternate body to the message.
AlternateView^ alternate = AlternateView::CreateAlternateViewFromString(body);
message->AlternateViews->Add(alternate);
// Send the message.
SmtpClient^ client = gcnew SmtpClient( server );
client->Credentials = CredentialCache::DefaultNetworkCredentials;
client->Send( message );
// Display the values in the ContentType for the attachment.
ContentType^ c = alternate->ContentType;
Console::WriteLine( L"Content type" );
Console::WriteLine( c );
Console::WriteLine( L"Boundary {0}", c->Boundary );
Console::WriteLine( L"CharSet {0}", c->CharSet );
Console::WriteLine( L"MediaType {0}", c->MediaType );
Console::WriteLine( L"Name {0}", c->Name );
Console::WriteLine( L"Parameters: {0}", c->Parameters->Count );
IEnumerator^ myEnum = c->Parameters->GetEnumerator();
while ( myEnum->MoveNext() )
{
DictionaryEntry^ d = safe_cast<DictionaryEntry^>(myEnum->Current);
Console::WriteLine( L"{0} = {1}", d->Key, d->Value );
}
Console::WriteLine();
alternate->~AlternateView();
}
public static void CreateMessageWithMultipleViews(string server, string recipients)
{
// Create a message and set up the recipients.
MailMessage message = new MailMessage(
"jane@contoso.com",
recipients,
"This email message has multiple views.",
"This is some plain text.");
// Construct the alternate body as HTML.
string body = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";
body += "<HTML><HEAD><META http-equiv=Content-Type content=\"text/html; charset=iso-8859-1\">";
body += "</HEAD><BODY><DIV><FONT face=Arial color=#ff0000 size=2>this is some HTML text";
body += "</FONT></DIV></BODY></HTML>";
ContentType mimeType = new System.Net.Mime.ContentType("text/html");
// Add the alternate body to the message.
AlternateView alternate = AlternateView.CreateAlternateViewFromString(body, mimeType);
message.AlternateViews.Add(alternate);
// Send the message.
SmtpClient client = new SmtpClient(server);
client.Credentials = CredentialCache.DefaultNetworkCredentials;
try
{
client.Send(message);
}
catch (Exception ex)
{
Console.WriteLine("Exception caught in CreateMessageWithMultipleViews(): {0}",
ex.ToString());
}
// Display the values in the ContentType for the attachment.
ContentType c = alternate.ContentType;
Console.WriteLine("Content type");
Console.WriteLine(c.ToString());
Console.WriteLine("Boundary {0}", c.Boundary);
Console.WriteLine("CharSet {0}", c.CharSet);
Console.WriteLine("MediaType {0}", c.MediaType);
Console.WriteLine("Name {0}", c.Name);
Console.WriteLine("Parameters: {0}", c.Parameters.Count);
foreach (DictionaryEntry d in c.Parameters)
{
Console.WriteLine("{0} = {1}", d.Key, d.Value);
}
Console.WriteLine();
alternate.Dispose();
}
Remarks
You can set the parameters by specifying the entire Content-Header value when constructing a ContentType object or you can add parameters to the StringDictionary returned by the Parameters property.
When adding a parameter entry to the dictionary, the name of the parameter is the entry's key and the value of the parameter is the entry's value.
A grammar that details the syntax of the Content-Type header is described in RFC 2045 Section 5.1. RFC 2046 provides detailed information on MIME media types and their associated parameters. These RFCs are available at https://www.ietf.org.
