C# - Send HTML email with line breaks - c#

I'm attempting to send emails from my C# app using the System.Net.Mail.MailMessage class. For the body of the email, I want to include line breaks to create separate blocks of text. How can I get an email client, like Outlook, to respect the line breaks when display the email has HTML to users? What character(s) do I insert in the body of the email text so that the line breaks are treated as line breaks?
Note: The body of my email is pure text, not HTML.

Line breaks are white space characters, and all white space characters are interpreted as spaces in HTML.
You can use break tags (<br/>) to add line breaks in the HTML code, and you can use paragraph tags (<p>...</p>) around paragraphs to get a distance between them.

You can just use Environment.NewLine property. That will insert a newline string defined for the current environment.

You need to insert HTML line-breaks i.e. <br/>

using the parograph tag is the best way in my opinion because it keeps the format clean and easy to maintain.
I hope this helps.
<p>Dear Mike</p>
<p>This is a sample message</p>
<p><b>Thank You,</b></p>

If you want to send the email as HTML, use the break tag as others have described. If you want line breaks to work, you'll need to send the message as plain text, which can be specified by setting IsBodyHtml = false.
If your existing line breaks aren't being used, try forcing with "\n" which is an escape sequence for a new line.

email.Body = new MessageBody(BodyType.Text, stringThatCointainsMessage);
at least using Microsoft.Exchange.WebServices.Data this will solve the problem
you need to use the overloaded method and the enum BodyType.Text

Related

which Newline Character works with Both C# and HTML at a time?

Hello I need Newline Character which works with both i.e C# and HTML
I know That in C# We can use,
System.Environment.NewLine or "\r\n"
and in Html We can use,
<br/>
What is the alternative to this?
That depends on where you intend using that new line. For text files, use NewLine or \r\n. For HTML documents, use <br/>.
As you wrote in the comments:
I want to write log in log file and also send that log via mail as html body.
So you would need to seperate the two cases.
For breaking a line in your log file, use \r\n or System.Environment.NewLine.
For breaking a line in your HTML body, use <br/>.
For using the log as an HTML document body, you can simply use:
string body = logFileConent.Replace(#"\r\n", "<br/>");
Where logFileConent is a string variable holding your text file lines.
Allright, use this type of strings:
"Debug: This is Debug 1 \r\n <br> Debug: This is Debug 2"
It will always display the <br> in the log file:
But the e-mail will only display a line break, if it displays HTML normally:

Matching a URL Encoded e-mail address in C#

I did some searching and didn't quite figure out why my solution is not working. Basically I need to take a string (which is HTML code) parse it and look for mailto links (which I then want to replace as part of an obfuscation). Here is what I have thus far:
string text = "<p>Some Person<br /> Person's Position<br />p. 123-456-7890<br /> e. <a title=\"Email Some Person\" target=\"_blank\" href=\"mailto:someperson%40domain.com\">someperson#domain.com</a></p>";
text = Server.UrlDecode(text);
string safeEmails = Regex.Replace(text, "()(.*?)()", "<a class=\"mailme\" href=\"$2*$4\">$6</a>");
Response.Write( Server.HtmlDecode(safeEmails));
The text is coming out of a WYSIWYG text editor (Telrik RadEditor for those familiar) and for all intents and purposes I don't have access to be able to control what is coming out of it.
Basically I need to find and replace any:
someone#domain.com
With:
<a class="mailme" href="someone#domain.com">someone#domain.com</a>
Some background: I am attempting to create a mailto link that will avoid detection by harvesters. The problem is that I receive a string with the e-mail as a standard mailto link. I cannot control the incoming string, so the mailto will always be an unprotected mailto. My object is to find all of them, obfuscate them, then use JavaScript to "fix" the link so that human vistors can easily use the mailto links. I am open to new approaches as well as modifications to the above code.
You could use a regex or the HTML agility pack to find and obfuscate all your mailto. If you want a good obfuscation try reading ten methods to obfuscate e-mail addresses compared
EDIT:
sorry, from the first version of your question I didn't get you had a problem in making your regex work. Since you're usign a WYSIWYG text editor, I think the HTML that comes out of it should be pretty "regular", so you may be fine using a regex.
You can try changing your Replace line like this:
string safeEmails = Regex.Replace(text, "href=\"mailto:.*\">(.*)</a>", "class=\"mailme\" href=\"$1\">$1</a>");

Remove Encoded HTML from Strings using RegEx

I currently have an extension method from removing any HTML from strings.
Regex.Replace(s, #"<(.|\n)*?>", string.Empty);
This works fine on the whole, however, I am occasionally getting passed strings that have both standard HTML markup within them, along with encoded markup (I don't have control of the source data so can't correct things at the point of entry), e.g.
<p><p>Sample text</p></p>
I need an expression that will remove both encoded and non-encoded HTML (whether it be paragraph tags, anchor tags, formatting tags etc.) from a string.
I think you can do that in two passes with your same Extension method.
First Replace the usual un-encoded tags then Decode the returned string and do it again. Simple

Safely insert line breaks into HTML

I have an application allows a user to copy paste html into a form. This html gets sent as an email, and the email server will not allow more than 1000 characters per line. So, I'd like to insert line breaks (\r\n) into the html after the user has hit submit. How can I do this without changing the content?
My idea is this:
html.replace('<', '\r\n<');
But is that guaranteed to not change the result? Is '<' not allowed in attributes?
Edit: I'm actually thinking this will not work because the html could have a script block with something like if(x < 3). I guess what I need is an html pretty printer that works in either js or C#.
If you Base64 encode the content, then you can break up the content into however many lines you want.
Email MIME standard uses transfer encoding techniques to solve this problem. Ideally you would be using a mail library that takes care of this for you, so you can insert lines of any length.
Using the System.Net.Mail.MailMessage class in C#, you should be able to construct a normal message and it will transfer-encode it for you. If that doesn't work, you can also construct a multi-part message with a single System.Net.Mail.AlternativeView and set the transfer-encoding explicitly.
Here is a sample I am currently using (note it has a character encoding bug, so your body text must be a unicode string):
private void Send(string body, bool isHtml, string subject, string recipientAddress, string recipientName, string fromAddress)
{
using (var message = new MailMessage(new MailAddress(fromAddress),
new MailAddress(recipientAddress, recipientName)))
{
message.Subject = subject;
var alternateView = AlternateView.CreateAlternateViewFromString(body, message.BodyEncoding,
isHtml ? "text/html" : "text/plain");
alternateView.TransferEncoding = TransferEncoding.QuotedPrintable;
message.AlternateViews.Add(alternateView);
var client = new SmtpClient();
client.Send(message);
}
}
You're getting into dangerous territory attempting to parse HTML with a replace function. The easiest method would be to just display a warning box on the form that tells the user that lines cannot be longer than 1000 characters, and return an error message if they attempt to submit content with lines over that length.
Otherwise, you could insert a linebreak after X number of characters, and insert some special markup (like <!--AUTO-LINEBREAK-->, or similar) that informs whoever is receiving the e-mail that an automatic line break was inserted.
Add normal line breaks where you think they should be. For example:
Off the top of my head, find all <p>, <table>, <tr>,<td>,<br>, and <div> tags and add a \r\n right before them.
Once that is done, loop through all the lines one more time. If there are any that are still 1000+ characters long, I would insert a \r\n in the whitespace.
Also, you should be removing any script tags from the HTML email body. Having script tags can cause all types of problems (marked as spam, marked as a virus, blocked, etc..).
I am not sure how you are delivering your email... if it is handed off to a php script that then send it to a mail server or uses the mail() method, then this link might help.
http://php.net/manual/en/function.wordwrap.php
If not, can you clarify your question a bit?
Another simply thought, is that you could use:
html.replace('','\r\n');
or:
html.replace('',''+String.fromCharCode(13));//inserts a carriage return
However, since the will ideally be parsed in the browser, inserting "\r\n" may not be effective and may actually just display as "\r\n"....
Hope any of this is helpful.

Regex Pattern to Extract Email Data

I'm retrieving raw text (includes header, and message) from a POP server. I need to capture everything after the header which is terminated by a blank line between it and the user message.
At the same time I'm wanting to ignore anything from original messages if it's a reply. The start of a reply for the emails I'm parsing start with
------Original Message------
An example email might look like this
Return-Path: ...
...
More Email Metadata: ...
Hello from regex land, I'm glad to hear from you.
------Original Message------
Metadata: ...
...
Hey regex dude, can you help me? Thanks!
Sincerely, Me.
I need to extract "Hello from regex land, I'm glad to hear from you." and any other text/lines prior to the original message.
I'm using this regex right now (C# in multiline mode)and it seems to work except it's capturing ------Original Message------ if the body is blank. I'd rather just have a blank string instead.
^\s*$\n(.*)(\n------Original Message------)?
Edit
I haven't down voted anyone and if you happen to downvote, it's usually helpful to include comments.
The reason for this is that you have an extra \n inside the parenthesis. If the body is blank, there is no extra newline there. Therefore, try this:
^\s*$\r\n(.*)(^------Original Message------$)?
If you don’t want the newline at the end of the body, you can still use string.Trim() on the matched part.
Note: This assumes that the input uses \r\n line terminators (which is required in e-mail headers according to the MIME standard).
Why don't you not use DotnetOpenMail? Using a regex to do this is a wrong approach, you'd be better off using a dedicated email handler instead....
You need to replace (\n------Original Message------) with (?=(\n------Original Message------)) lookahead to not return that part, just to ensure it's there

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