The ECM features of SharePoint 2010 are excellent. The best thing is the extendibility of the platform using SharePoint designer and Visual Studio. By default SharePoint includes field types such as Single line text, multi-line text etc. The following is the snapshot of the fields available in SharePoint 2010
The out of the box field controls are useful for most situations, but still you may need additional field types when building business applications. Fortunately you can build custom field controls using Visual Studio 2010 and deploy to SharePoint. Custom field control can provide a unique editing and display experience. Custom field controls can be used to include custom client-side validation and a unique editing experience.
In this article I am going to demonstrate how you can build custom field control for SharePoint 2010. For the purpose of this article, I am going to build a custom field control that inherits the single line of text. When displaying the control, it will show the entered text in <h1> tags. Also the field will convert the text to upper case while displaying. The custom field will throw error if it contains more than 10 characters. The examples looks simple, my intention is to show you how easily you can build custom controls. In real time you can add your business logic to build your own field controls.
