Setting up form for HTML Email and Avoiding HttpRequestValidationException

In a previous post I showed you how to set up .NET for email. But what if I want to send it as HTML. I tried and received this error: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client ...

The validation problem is solved by setting the Page attribute Validation="false". But then when I sent the HTML it was received as text.

The solution is to use IsHTML=true In my example, I used a check box:

    protected void btnSend_Click(object sender, EventArgs e)
    {
        string sTo = "jane@foo.com";
        string sFrom = ddlFrom.SelectedItem.Text.Trim();
        string sSubject = txtSubject.Text.Trim();
        string sBody = txtContent.Text.Trim();
        lblStatus.Text = "Sending... please wait";
        MailMessage msg = new MailMessage(sFrom, sTo, sSubject, sBody);
        msg.IsBodyHtml = chkIsHTML.Checked;
        SmtpClient mailObj = new SmtpClient("localHost");
        mailObj.Credentials = new NetworkCredential("username", "password");
        mailObj.Send(msg);
        clearTexts();
        lblStatus.Text = "Success: Sent message to Jane at " + DateTime.Now.ToLongTimeString() + " Eastern.";
    
    }

References: http://www.hintsandtips.com/ShowPost/131/hat.aspx
http://aspnet.4guysfromrolla.com/articles/080206-1.aspx