Page a TemplateControl derived from Control derived from Object important page members debug: Trace - for debug log storage: Session -- session data for the current caller Cache -- client side livable kvp Application -- webapp (to use common variables KVP bag) To know call/caller 1 ClientTarget requesting browser 2 IsPostBack -- in response to a client postback or first time 3 Request HTTPRequest- to get the request details Output related: MasterPageFile = common page components. Establishes the master page for the current page Response - this is what you output Server HttpServerUtility object, for server-side helper functions Theme page theme

Members of the HttpRequest Cookies : kvps @clients pace as cookies Form collection of HTTP form variables Headers collection of HTTP headers QueryString collection of HTTP query variables ServerVariables a collection of web server variables ApplicationPath WebApps virtual application root path on the server FilePath Indicates the virtual path of the current request Browser : Client capabilities HttpMethod transfer method (GET/ POST) IsSecureConnection whether HTTP /HTTPS RawUrl request’s URL RequestType data transfer method by client (GET/POST) UserHostAddress IP host address of the remote client UserHostName DNS name of client

some validation controls CompareValidator CustomValidator RangeValidator RegularExpressionValidator RequiredFieldValidator ValidationSummary

validation controls are not used to emit HTML for rendering purposes, but are used to emit client-side JavaScript (and possibly related server-side code) for the purpose of form validation ControlToValidate ,,Display ,EnableClientScript ,ErrorMessage ,ForeColor Enabling Client Side JavaScript Validation Support with ASP.NET 4.5, "EnableClientScript " a new setting which can be used to control how validation controls respond at runtime.