MailMessage クラスとは? わかりやすく解説

MailMessage クラス

メモ : このクラスは、.NET Framework version 2.0新しく追加されたものです。

SmtpClient クラス使用して送信できる電子メール メッセージ表します

名前空間: System.Net.Mail
アセンブリ: System (system.dll 内)
構文構文

Public Class MailMessage
    Implements IDisposable
public class MailMessage : IDisposable
public class MailMessage implements IDisposable
public class MailMessage implements IDisposable
解説解説
使用例使用例

添付データ含んだ電子メール メッセージ作成および送信を行うコード例次に示します

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;
    client.Send(message);
    // 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();
}
継承階層継承階層
System.Object
  System.Net.Mail.MailMessage
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
MailMessage メンバ
System.Net.Mail 名前空間

MailMessage クラス

メモ : このクラスは、互換性のために残されています。

電子メール作成するためのプロパティメソッド提供します推奨する代替 : System.Net.Mail

名前空間: System.Web.Mail
アセンブリ: System.Web (system.web.dll 内)
構文構文

<ObsoleteAttribute("The recommended alternative is System.Net.Mail.MailMessage.
 http://go.microsoft.com/fwlink/?linkid=14202")> _
Public Class MailMessage
[ObsoleteAttribute("The recommended alternative is System.Net.Mail.MailMessage.
 http://go.microsoft.com/fwlink/?linkid=14202")] 
public class MailMessage
[ObsoleteAttribute(L"The recommended alternative is System.Net.Mail.MailMessage.
 http://go.microsoft.com/fwlink/?linkid=14202")] 
public ref class MailMessage
/** @attribute ObsoleteAttribute("The recommended alternative is System.Net.Mail.MailMessage.
 http://go.microsoft.com/fwlink/?linkid=14202") */ 
public class MailMessage
ObsoleteAttribute("The recommended alternative is System.Net.Mail.MailMessage.
 http://go.microsoft.com/fwlink/?linkid=14202") 
public class MailMessage
使用例使用例
<%-- 
This example shows how to send a mail message from a Web Forms
 page 
using the classes in the System.Web.Mail namespace.
--%>

<%@ IMPORT namespace="System.Web.Mail"
 %>

<html>
   <script language=VB runat=server>
      Sub Page_Load()
         If Not IsPostback Then
            lblMsg1.Text=""
            txtTo.Text="john@contoso.com"
            txtFrom.Text="marsha@contoso.com"
            txtCc.Text="fred@contoso.com"
            txtBcc.Text="wilma@contoso.com"
            txtSubject.Text="Hello"
            txtBody.Text="This is a test message."
            txtAttach.Text="C:\Documents and Settings\All Users\Documents\My
 Pictures\Sample Pictures\Sunset.jpg," _
               & "C:\Documents and Settings\All Users\Documents\My
 Pictures\Sample Pictures\Winter.jpg"
        txtBodyEncoding.Text = Encoding.ASCII.EncodingName
        txtBodyFormat.Text="HTML"
         txtPriority.Text="Normal"
        txtUrlContentBase.Text="http://www.contoso.com/images"
        txtUrlContentLocation.Text="http://www.contoso.com/images"
            ' Name of relay mail server in your domain.
        txtMailServer.Text="smarthost"'
         End If
      End Sub

      Sub btnSubmit_Click(ByVal sender As
 Object, ByVal e As EventArgs)
         Dim sTo As String,
 sFrom As String, sSubject As
 String, sBody As String
         Dim sAttach As String,
 sCc As String, sBcc As
 String, sBodyEncoding As String
         Dim sBodyFormat As String,
 sMailServer As String, sPriority As
 String
         Dim sUrlContentBase As String,
 sUrlContentLocation As String
     Dim iLoop1 As Integer

     sTo = Trim(txtTo.Text)
     sFrom = Trim(txtFrom.Text)
     sSubject = Trim(txtSubject.Text)
     sBody = Trim(txtBody.Text)
     sAttach = Trim(txtAttach.Text)
     sCc = Trim(txtCc.Text)
     sBcc = Trim(txtBcc.Text)
     sBodyFormat = Trim(txtBodyFormat.Text)
     sBodyEncoding = Trim(txtBodyEncoding.Text)
     sPriority = Trim(txtPriority.Text)
     sUrlContentBase = Trim(txtUrlContentBase.Text)
     sUrlContentLocation = Trim(txtUrlContentLocation.Text)
     sMailServer = Trim(txtMailServer.Text)

     Dim MyMail As MailMessage = New
 MailMessage()
     MyMail.From = sFrom
     MyMail.To = sTo
     MyMail.Subject = sSubject
     MyMail.Body = sBody
     MyMail.Cc = sCc
     MyMail.Bcc = sBcc
     MyMail.UrlContentBase = sUrlContentBase
     MyMail.UrlContentLocation = sUrlContentLocation

     Select Case txtBodyEncoding.Text
            Case Encoding.UTF7.EncodingName : MyMail.BodyEncoding
 = Encoding.UTF7
            Case Encoding.UTF8.EncodingName : MyMail.BodyEncoding
 = Encoding.UTF8
            Case Else : MyMail.BodyEncoding
 = Encoding.ASCII
         End Select

     Select Case UCase(sBodyFormat)
            Case "HTML" : MyMail.BodyFormat
 = MailFormat.Html
            Case Else : MyMail.BodyFormat =
 MailFormat.Text
         End Select
         
         Select Case UCase(sPriority)
            Case "HIGH" : MyMail.Priority
 = MailPriority.High
            Case "LOW" : MyMail.Priority
 = MailPriority.Low
            Case Else : MyMail.Priority = MailPriority.Normal
         End Select
         
         ' Build an IList of mail attachments.
         If sAttach<>"" Then
            Dim delim As Char
 = ","
            Dim sSubstr As String
            For Each sSubstr in
 sAttach.Split(delim)
               Dim myAttachment As MailAttachment
 = New MailAttachment(sSubstr)
               myMail.Attachments.Add(myAttachment)
            Next
         End If
     
         SmtpMail.SmtpServer = sMailServer
     SmtpMail.Send(MyMail)

     lblMsg1.Text="VB Message sent to " & MyMail.To
      End Sub

      Sub btnClear_Click(ByVal sender As
 Object, ByVal e As EventArgs)
         lblMsg1.Text=""
         txtTo.Text=""
         txtFrom.Text=""
         txtSubject.Text=""
         txtBody.Text=""
         txtAttach.Text=""
         txtBcc.Text=""
         txtCc.Text=""
     txtBodyEncoding.Text=""
     txtBodyFormat.Text=""
      txtPriority.Text=""
     txtUrlContentBase.Text=""
     txtUrlContentLocation.Text=""
     txtMailServer.Text=""
         btnSubmit.Text="Submit"
      End Sub
   </script>

   <p><h4>Send a new mail message:<h4></p>
   <Form method="Post" action="MailForm.aspx"
 runat=server>
      <table width="350" bgcolor="#FFFF99">
         <tr>
            <td Align="Right"><b>To:</b></td>
            <td><Asp:Textbox id="txtTo" runat=server/></td>
         </tr>
         <tr>
            <h4><td Align="Right"><b>From:</b></td></h4>
            <td><Asp:Textbox id="txtFrom"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Subject:</b></td>
            <td><Asp:Textbox id="txtSubject"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>MessageBody:</b></td>
            <td><Asp:Textbox id="txtBody"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Attachments:</b></td>
            <td><Asp:Textbox id="txtAttach"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>CC:</b></td>
            <td><Asp:Textbox id="txtBcc"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BCC:</b></td>
            <td><Asp:Textbox id="txtCc" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyEncoding:</b></td>
            <td><Asp:Textbox id="txtBodyEncoding"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyFormat:</b></td>
            <td><Asp:Textbox id="txtBodyFormat"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Priority:</b></td>
            <td><Asp:Textbox id="txtPriority"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content
 Base:</b></td>
            <td><Asp:Textbox id="txtUrlContentBase"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content
 Location:</b></td>
            <td><Asp:Textbox id="txtUrlContentLocation"
 runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Mail
 Server:</b></td>
            <td><Asp:Textbox id="txtMailServer"
 runat=server/></td>
         </tr>
      </table><br>

      <asp:button id="btnSubmit" Text="Submit"
 OnClick="btnSubmit_Click" runat=server/>
      <asp:button id="btnClear" Text="Clear"
 OnClick="btnClear_Click" runat=server/>
      <p><asp:Label id="lblMsg1" runat=server/></p>
   </form>
</html>
<%-- 
This example shows how to send a mail message from a Web Forms page
using the classes in the System.Web.Mail namespace.
--%>

<%@ IMPORT namespace="System.Web.Mail" %>

<html>
   <script language=C# runat=server>
      void Page_Load()
      {
         if (!IsPostBack)
         {
            txtTo.Text="john@contoso.com";
            txtFrom.Text="marsha@contoso.com";
            txtCc.Text="fred@contoso.com";
            txtBcc.Text="wilma@contoso.com";
            txtSubject.Text="Hello";
            txtBody.Text="This is a test message.";
            txtAttach.Text=@"C:\Documents and Settings\All Users\Documents\My
 Pictures\Sample Pictures\Sunset.jpg,"
               + @"C:\Documents and Settings\All Users\Documents\My Pictures\Sample
 Pictures\Winter.jpg";
        txtBodyEncoding.Text = Encoding.ASCII.EncodingName;
        txtBodyFormat.Text="HTML";
         txtPriority.Text="Normal";
        txtUrlContentBase.Text="http://www.contoso.com/images";
        txtUrlContentLocation.Text="http://www.contoso.com/images";
            // Name of relay mail server in your domain.
        txtMailServer.Text="smarthost";
         }
      }

      void btnSubmit_Click(Object sender, EventArgs e)
      {
         string sTo, sFrom, sSubject, sBody;
         string sAttach, sCc, sBcc, sBodyEncoding;
         string sBodyFormat, sMailServer, sPriority;
         string sUrlContentBase, sUrlContentLocation;
     int iLoop1;

     sTo = txtTo.Text.Trim();
     sFrom = txtFrom.Text.Trim();
     sSubject = txtSubject.Text.Trim();
     sBody = txtBody.Text.Trim();
     sAttach = txtAttach.Text.Trim();
     sCc = txtCc.Text.Trim();
     sBcc = txtBcc.Text.Trim();
     sBodyFormat = txtBodyFormat.Text.Trim();
     sBodyEncoding = txtBodyEncoding.Text.Trim();
     sPriority = txtPriority.Text.Trim();
     sUrlContentBase = txtUrlContentBase.Text.Trim();
     sUrlContentLocation = txtUrlContentLocation.Text.Trim();
     sMailServer = txtMailServer.Text.Trim();

     MailMessage MyMail = new MailMessage();
     MyMail.From = sFrom;
     MyMail.To = sTo;
     MyMail.Subject = sSubject;
     MyMail.Body = sBody;
     MyMail.Cc = sCc;
     MyMail.Bcc = sBcc;
     MyMail.UrlContentBase = sUrlContentBase;
     MyMail.UrlContentLocation = sUrlContentLocation;

         if (txtBodyEncoding.Text == Encoding.UTF7.EncodingName)
            MyMail.BodyEncoding = Encoding.UTF7;
         else if (txtBodyEncoding.Text == Encoding.UTF8.EncodingName)
            MyMail.BodyEncoding = Encoding.UTF8;
         else
            MyMail.BodyEncoding = Encoding.ASCII;

     switch (sBodyFormat.ToUpper())
         {
            case "HTML": 
               MyMail.BodyFormat = MailFormat.Html;
               break;
            default: 
               MyMail.BodyFormat = MailFormat.Text;
               break;
         }
         
         switch (sPriority.ToUpper())
         {
            case "HIGH": 
               MyMail.Priority = MailPriority.High;
               break;
            case "LOW": 
               MyMail.Priority = MailPriority.Low;
               break;
            default: 
               MyMail.Priority = MailPriority.Normal;
               break;
         }
         
         // Build an IList of mail attachments.
         if (sAttach != "")
         {
            char[] delim = new char[]
 {','};
            foreach (string sSubstr in
 sAttach.Split(delim))
            {
               MailAttachment MyAttachment = new MailAttachment(sSubstr);
               MyMail.Attachments.Add(MyAttachment);
            }
         }
     
         SmtpMail.SmtpServer = sMailServer;
     SmtpMail.Send(MyMail);
     lblMsg1.Text="C# Message sent to " + MyMail.To;
      }

      void btnClear_Click(Object sender, EventArgs e)
      {
         lblMsg1.Text="";
         txtTo.Text="";
         txtFrom.Text="";
         txtSubject.Text="";
         txtBody.Text="";
         txtAttach.Text="";
         txtBcc.Text="";
         txtCc.Text="";
     txtBodyEncoding.Text="";
     txtBodyFormat.Text="";
      txtPriority.Text="";
     txtUrlContentBase.Text="";
     txtUrlContentLocation.Text="";
     txtMailServer.Text="";
         btnSubmit.Text="Submit";
      }
   </script>

   <p><h4>Send a new mail message:<h4></p>
   <Form method="Post" action="MailForm.aspx" runat=server>
      <table width="350" bgcolor="#FFFF99">
         <tr>
            <td Align="Right"><b>To:</b></td>
            <td><Asp:Textbox id="txtTo" runat=server/></td>
         </tr>
         <tr>
            <h4><td Align="Right"><b>From:</b></td></h4>
            <td><Asp:Textbox id="txtFrom" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Subject:</b></td>
            <td><Asp:Textbox id="txtSubject" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>MessageBody:</b></td>
            <td><Asp:Textbox id="txtBody" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Attachments:</b></td>
            <td><Asp:Textbox id="txtAttach" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>CC:</b></td>
            <td><Asp:Textbox id="txtBcc" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BCC:</b></td>
            <td><Asp:Textbox id="txtCc" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyEncoding:</b></td>
            <td><Asp:Textbox id="txtBodyEncoding" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>BodyFormat:</b></td>
            <td><Asp:Textbox id="txtBodyFormat" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Priority:</b></td>
            <td><Asp:Textbox id="txtPriority" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content Base:</b></td>
            <td><Asp:Textbox id="txtUrlContentBase" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>URL Content Location:</b></td>
            <td><Asp:Textbox id="txtUrlContentLocation" runat=server/></td>
         </tr>
         <tr>
            <td Align="Right"><b>Mail Server:</b></td>
            <td><Asp:Textbox id="txtMailServer" runat=server/></td>
         </tr>
      </table><br>

      <asp:button id="btnSubmit" Text="Submit" OnClick="btnSubmit_Click"
 runat=server/>
      <asp:button id="btnClear" Text="Clear" OnClick="btnClear_Click"
 runat=server/>
      <p><asp:Label id="lblMsg1" runat=server/></p>
   </form>
</html>
継承階層継承階層
System.Object
  System.Web.Mail.MailMessage
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
MailMessage メンバ
System.Web.Mail 名前空間


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