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Dyanamic HTML out of a Database

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Bryan Andrews

We have a subscription service that reads html stored in a table for =
things (email content) such as Welcome Messages, Opt Out, Passwords, =
etc., and I need to be able to dynamically insert things such as the =
users email address etc. when I send it.

I have already gone down the path of just putting made up fields in the =
html like: [[usersemail]] and doing a replace on it when I am formatting =
the email.

While this works ok, I feel like there may be an easier (and perhaps =
more logical) way to do this.=20

Maybe not though.

Thanks for any thoughts...

Reply to this message...

Michael Storey

If all you are doing is creating HTML to be inserted into an email why =
not create a page that contains bound fields. This page can then be =
requested in memory and the HTML can be read out of it. I do a similar =
thing using the (cut down) code below. The EmailToSend.aspx is a page =
containing the dynamic information to be sent to the indidvidual user. I =
loop through this code using a datareader object (dr here). BTW this =
code can be put anywhere it doesn't necessarily have to be in the code =
behind of an aspx page.

The performence of this is actually suprisingly good. I tested it on =
about 10000 records and it took about a dozen or so seconds. I would =
imagine millions of records (SPAM!) would cause problems though.

''''''' Imports may not need some of these=20
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.IO
Imports System.Net
Imports System.Web.Mail

Dim objResponse As WebResponse
Dim objRequest As WebRequest =3D =
System.Net.HttpWebRequest.Create("EmailToSend.aspx?UserID=3D" + =
CStr(dr.Item("User_ID")))

objResponse =3D objRequest.GetResponse
Dim sr As New StreamReader(objResponse.GetResponseStream)
Dim strTheMessage As String =3D sr.ReadToEnd()

Dim msgMail As New MailMessage()
msgMail.To =3D dr("email_address")
msgMail.From =3D "Michael"
msgMail.Subject =3D "DO NOT reply to this message"
msgMail.BodyFormat =3D MailFormat.Html
msgMail.Body =3D strTheMessage

Try
SmtpMail.SmtpServer =3D "whatever"
SmtpMail.Send(msgMail)
Catch e As Exception
Response.Write(SmtpMail.SmtpServer + e.Message)
End Try

Reply to this message...

	System.IO.StreamReader
	System.Net.HttpWebRequest
	System.Net.WebRequest
	System.Net.WebResponse
	System.Web.Mail.MailFormat
	System.Web.Mail.MailMessage
	System.Web.Mail.SmtpMail

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