c#之如何使用 C# 在电子邮件中发送格式化文本

下面是我发送电子邮件的代码片段:

            MySqlCommand cmdsd; 
            MySqlConnection conn; 
            string s23 = ""; 
            conn = new MySqlConnection("server=localhost;database=projecttt;uid=root;password=techsoft"); 
            conn.Open(); 
 
             //smtp which will be loaded is webmail.techsofttechnologies.com 
            cmdsd = new MySqlCommand("select smtp from smtp", conn); 
            MySqlDataReader dr45 = cmdsd.ExecuteReader(); 
 
            while (dr45.Read()) 
            { 
                s23 = dr45.GetString(0).Trim(); 
            } 
            string s1 = textBox3.Text; 
            string s4 = textBox1.Text; 
            string S5 = textBox2.Text; 
            string attachment = textBox5.Text; 
            MailMessage mail = new MailMessage(); 
            mail.From = new MailAddress(s4, S5); 
            mail.BodyEncoding = Encoding.UTF8;                 
            mail.To.Add(s1); 
            mail.Subject = textBox4.Text; 
            mail.Body = "<body>"+textBox6.Text+"</body>";                 
            //mail.Body = textBox6.AppendText("\n"); 
 
            AlternateView planview = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable tby those clients that don't support html"); 
            AlternateView htmlview = AlternateView.CreateAlternateViewFromString("<b>This is bold text and viewable by those mail clients that support html<b>"); 
            mail.IsBodyHtml = true; 
            mail.Priority = MailPriority.High; 
            System.Net.Mail.Attachment jil = new System.Net.Mail.Attachment(attachment); 
            mail.Attachments.Add(jil); 
            SmtpClient smtp = new SmtpClient(s23); 
            try 
            { 
                smtp.Send(mail); 
            } 
 
            catch (Exception ex) 
            { 
                Exception exc = ex; 
                string Message = string.Empty; 
                while (exc != null) 
                { 
                    Message += exc.ToString(); 
                    exc = exc.InnerException; 
                } 
            } 
            conn.Close(); 
            this.Close(); 
        } 
        catch (Exception err) 
        { 
            MessageBox.Show(err.Message); 
        } 
 
    } 

邮件正文包含带换行符的文本。

但是我无法格式化文本。在邮件中，它显示为用空格代替换行符的连续行。

如何让它按预期工作？

请您参考如下方法:

您可能需要将换行符转换为正确的 HTML 分隔符:

text.Replace("\n", "<br/>")