Table of contents

  1. Display label text with line breaks in c#
  2. Convert (render) HTML to Text with correct line-breaks in C#
  3. Line breaks ignored when sending mail as plain text in C#

Display label text with line breaks in c#

To display label text with line breaks in C#, you can set the Text property of the label to a string that includes newline characters (\n). Here's an example:

label1.Text = "Line 1\nLine 2\nLine 3";

In this example, we set the Text property of label1 to a string that includes three lines of text, separated by newline characters.

When you run the application, the label will display the text with line breaks:

Line 1
Line 2
Line 3

You can also use the Environment.NewLine property to insert a platform-specific newline sequence, which is usually equivalent to \r\n. Here's an example:

label1.Text = "Line 1" + Environment.NewLine + "Line 2" + Environment.NewLine + "Line 3";

This will produce the same result as the previous example.


Convert (render) HTML to Text with correct line-breaks in C#

To convert HTML to plain text with correct line breaks in C# you can use the HtmlAgilityPack and System.Text.RegularExpressions packages.

Here's an example of how to use these packages to convert HTML to plain text with correct line breaks:

using HtmlAgilityPack;
using System.Text.RegularExpressions;

public static string ConvertHtmlToText(string html)
{
    // Load the HTML string into an HtmlDocument object
    HtmlDocument htmlDoc = new HtmlDocument();
    htmlDoc.LoadHtml(html);

    // Extract the text from the HTML document
    string text = htmlDoc.DocumentNode.InnerText;

    // Remove all leading and trailing white space characters
    text = text.Trim();

    // Replace all sequences of white space characters with a single space character
    text = Regex.Replace(text, @"\s+", " ");

    // Replace all occurrences of <br> or <br/> tags with a line break character
    text = Regex.Replace(text, @"<br\s*/?>", "\n");

    return text;
}

In this example, we first load the HTML string into an HtmlDocument object using the HtmlAgilityPack package. We then extract the text from the HTML document using the InnerText property of the HtmlDocument.DocumentNode object.

We remove all leading and trailing white space characters from the text using the Trim method, and replace all sequences of white space characters with a single space character using a regular expression pattern.

Finally, we replace all occurrences of <br> or <br/> tags with a line break character (\n) using another regular expression pattern.

Note that this method is not perfect and may not handle all HTML tags and special cases. If you need more robust HTML-to-text conversion, you may want to consider using a third-party library or service that specializes in this task.


Line breaks ignored when sending mail as plain text in C#

When sending an email as plain text in C# using the System.Net.Mail namespace, line breaks can be ignored if they are not in the correct format. In plain text emails, you should use the carriage return and line feed characters ("\r\n") to represent line breaks.

Here's how you can send an email as plain text with proper line breaks:

using System;
using System.Net;
using System.Net.Mail;

public class Program
{
    public static void Main()
    {
        // SMTP settings for your email provider
        string smtpHost = "smtp.example.com";
        int smtpPort = 587;
        string smtpUsername = "[email protected]";
        string smtpPassword = "your-email-password";

        // Sender and recipient information
        string senderEmail = "[email protected]";
        string recipientEmail = "[email protected]";

        // Email content
        string subject = "Plain Text Email";
        string body = "Hello,\r\nThis is a plain text email.\r\nThank you.";

        try
        {
            using (SmtpClient smtpClient = new SmtpClient(smtpHost, smtpPort))
            {
                smtpClient.EnableSsl = true;
                smtpClient.Credentials = new NetworkCredential(smtpUsername, smtpPassword);

                using (MailMessage mailMessage = new MailMessage(senderEmail, recipientEmail, subject, body))
                {
                    mailMessage.IsBodyHtml = false; // Set to false for plain text

                    smtpClient.Send(mailMessage);
                    Console.WriteLine("Email sent successfully.");
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Failed to send email: {ex.Message}");
        }
    }
}

In the body variable, we use "\r\n" to represent line breaks. When you send this email, the line breaks should be correctly preserved in the plain text email message.

If you notice that line breaks are still being ignored, make sure you are using the correct "\r\n" sequence for line breaks and that your email client is displaying plain text emails correctly. Some email clients may still interpret plain text emails and modify the appearance of line breaks for better readability. However, the "\r\n" sequence should generally be preserved as intended.


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