ContentType 类

定义

命名空间:

System.Net.Mime

程序集:

System.Net.Mail.dll

Source:

ContentType.cs

表示 MIME 协议内容类型标题。

public ref class ContentType

public class ContentType

type ContentType = class

Public Class ContentType

继承

Object

ContentType

示例

下面的代码示例发送一封包含附件的电子邮件， ContentDisposition 并显示附件的属性。

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 = L"data.xls";
   
   // Create a message and set up the recipients.
   MailMessage^ message = gcnew MailMessage( L"jane@contoso.com",L"ben@contoso.com",L"Quarterly data report.",L"See the attached spreadsheet." );
   
   // Create  the file attachment for this email message.
   Attachment^ data = gcnew 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 email message.
   message->Attachments->Add( data );
   
   //Send the message.
   SmtpClient^ client = gcnew 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( L"Content disposition" );
   Console::WriteLine( cd );
   Console::WriteLine( L"File {0}", cd->FileName );
   Console::WriteLine( L"Size {0}", cd->Size );
   Console::WriteLine( L"Creation {0}", cd->CreationDate );
   Console::WriteLine( L"Modification {0}", cd->ModificationDate );
   Console::WriteLine( L"Read {0}", cd->ReadDate );
   Console::WriteLine( L"Inline {0}", cd->Inline );
   Console::WriteLine( L"Parameters: {0}", cd->Parameters->Count );
   IEnumerator^ myEnum1 = cd->Parameters->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      DictionaryEntry^ d = safe_cast<DictionaryEntry^>(myEnum1->Current);
      Console::WriteLine( L"{0} = {1}", d->Key, d->Value );
   }

   data->~Attachment();
   client->~SmtpClient();
}

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 email 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 email 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();
}

注解

类中 ContentType 的信息用于描述电子邮件中包含的数据，使显示电子邮件的软件能够以适当的方式显示内容。 ContentType 与 类一起使用 Attachment ，以指定附件中的内容类型。

RFC 2045 第 5.1 节介绍了 Content-Type 标头的语法。 RFC 2046 提供有关 MIME 媒体类型及其参数的详细信息。 这些 RFC 在 中可用 https://www.ietf.org。

构造函数

ContentType()	初始化 ContentType 类的新默认实例。
ContentType(String)	使用指定的字符串初始化 ContentType 类的新实例。

属性

Boundary	获取或设置由此实例表示的 Content-Type 标头中包含的边界参数的值。
CharSet	获取或设置由此实例表示的 Content-Type 标头中包含的字符集参数的值。
MediaType	获取或设置由此实例表示的 Content-Type 标头中包含的媒体类型值。
Name	获取或设置由此实例表示的 Content-Type 标头中包含的名称参数的值。
Parameters	获取包含由此实例表示的 Content-Type 标头中包含的参数的字典。

方法

Equals(Object)	确定指定 ContentType 对象的 Content-Type 标头是否等于此对象的 Content-Type 标头。
GetHashCode()	确定指定 ContentType 对象的哈希代码。
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回此 ContentType 对象的字符串表示形式。

另请参阅

• SmtpClient
• MailMessage