Updating database on button click from email body

You can try with simple ajax calls like below:

Consider this is the html on your email:

 charset="utf-8" /> 

 src="Scripts/jquery-1.10.2.js">

  type="text/javascript"> // Ajax call using jquery to your website's page
 function callAjax(actiontype) 

{ var request = $.ajax({ url: "http://yoururl/webform1.aspx", method: "GET", data: 

{ paramvalue: actiontype }, dataType: "html" }); }

  type="button" onclick="callAjax('Accept');" value="Accept" /> 

 type="button" onclick="callAjax('Reject');" value="Reject" /> 

Below is the Webform1.aspx code behind,

 where you can catch the parameter based on button click and do update on the DB.

 public partial class WebForm1 : System.Web.UI.Page 

{

 protected void Page_Load(object sender, EventArgs e)

 { var action = Request.QueryString["paramvalue"]; 

if (!string.IsNullOrEmpty(action)) { // implement the rest of the stuff 

if (action.ToLower() == "accept")

 { // update DB } else if (action == "reject")

 { // Update DB } } } }

Hope this helps!