To achieve what you’re describing, you’ll need:
- the exact name of the post type (event) and field name (price)
- a way to create the URL with dynamic template tags
The second point requires that you have control over the entire link being displayed, for example in a block or theme template file. Depending on what is displaying the link currently (sounds like the form plugin), it may be difficult to use dynamic template tags necessary for passing the URL query parameter.
- The name of the Post Type is events and the field name is Price.
- I really don’t understand what you mean here.
…The Form was just placed on a normal Page, through its shortcode: so it doesn’t really control anything. However, if you add a query string parameter value to the URL where the Form is located, it is able to capture that value into the Form.
How and where are you displaying the URL (the link to the form page)? Are you able to add a dynamic template tag there?
Here’s a rough sketch of the events list.
<Loop type=event count=4>
<Field title /><br>
Price: <Field name=Price /><br>
<a href="/example-form?price={Field Price}">Link to form</a>
</Loop>
You might want to encode the URL query parameter using Format: