AccessKey: a key that navigates to the ImageButton control.
AlternateText: alternate text for the image (required for accessibility).
DescriptionUrl: a link to a page that contains a detailed description of the image (required to make a complex image accessible).
CommandArgument: a command argument that is passed to the Command event.
CommandName: command name that is passed to the Command event.
Enabled: disable the ImageButton control.
GenerateEmptyAlternateText: set the AlternateText property to an empty string.
ImageAlign: align the image relative to other HTML elements in the page.
Possible values are AbsBottom, AbsMiddle, Baseline, Bottom, Left,
Middle, NotSet, Right, TextTop, and Top.
ImageUrl: URL to the image.
OnClientClick: a client-side script that executes when the ImageButton is clicked.
PostBackUrl: post a form to a particular page.
TabIndex: tab order of the ImageButton control.
Focus: set the initial form focus to the ImageButton control.
Click: Raised when the ImageButton control is clicked.
Command: Raised when the ImageButton control is clicked.
The CommandName and CommandArgument are passed to this event.