Here Mudassar Ahmed Khan has explained with an example, how to send email using Contact Us Form in ASP.Net using C# and VB.Net.

The Contact Us Form contains some TextBox controls, a Rich TextBox and a FileUpload control to attach file.

When the Send Button is clicked, the values from the TextBox fields are embedded into HTML string and the HTML string is send as Email and the File is attached to the Email.

Here Mudassar Ahmed Khan has explained with an example and attached sample code, how to implement free TinyMCE Editor as Rich TextBox in ASP.Net using C# and VB.Net.

Here Mudassar Ahmed Khan has explained the cause and solution for the error A potentially dangerous Request.Form value was detected from the client in ASP.Net.

The error exception A potentially dangerous Request.Form value was detected from the client occurs when ValidateRequest is set true and someone tries to submit HTML content to server example <a>Hello</a>. This error comes since ASP.Net tries to protect the application from Script Attacks.

Here Mudassar Ahmed Khan has explained with an example, how to create a Contact Us Form with HTML Rich Text Editor in ASP.Net using C# and VB.Net.

The Contact Us Form contains some TextBox controls and a FileUpload control to attach file.

When the Send Button is clicked, the values from the TextBox fields are embedded into HTML string and the HTML string is send as Email and the File is attached to the Email.