title: passing value to umbraco form and setting the fields rendring through macro
body: <p>I want to set the form fields like name and email from data though url query string . I have rendered the form through macro . how i can do that
  my macro rendering code is </p>
  
  <pre><code>@Umbraco.RenderMacro("renderUmbracoForm", new {FormGuid="ccebfbe8-aa28-497e-8078-c3577c88f47a", FormTheme="" ,
   ExcludeScripts="0"} )
  </code></pre>
  
  <p>My form fields are Name, Email , EventName 
  <a href="https://i.stack.imgur.com/A3BqX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A3BqX.png" alt="form pic"></a>
  and url query is </p>
  
  <p><a href="http://localhost:17402/register?eventId=1342&amp;eventName=you%20cant%20save%20the%20world%20alone" rel="nofollow noreferrer">http://localhost:17402/register?eventId=1342&amp;eventName=you%20cant%20save%20the%20world%20alone</a></p>