Tips for custom EditForm and NewForm

First of all, if you create new custom page for editing or adding items, BASE IT OFF THE ORIGINAL EditForm.aspx or NewForm.aspx.
You do it by saving these files “AS”.

Second of all, DO NOT REMOVE THE ORIGINAL ListFormWebPart.
If you do it, you will not be able to set this page as the default edit or add page.
Even if you don’t create custom page, instead you modify the default once, when users are opening item for edit, they will be redirected to the home page of the portal.

The key is to hide the original ListFormWebPart and modify some properties in order for it not to be displayed and interfering with the submission of the custom List Form webPart that will be doing all the action.
Here are the properties that you will have to modify in the original ListFormWebPart:
1. <IsVisible>true</IsVisible> set it to <IsVisible>false</IsVisible>
2. <ControlMode xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">Edit</ControlMode>
Or
3. <ControlMode xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">New</ControlMode>

set it to

<ControlMode xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">Display</ControlMode>

Enjoy