What does the term ViewState mean?
What Does View State Mean? View state is the page-level state management technique used in the ASP.NET page framework to retain the value of controls and page between round trips. View state is ideally used when the data to be preserved is relatively small and the data need not be secured.
What is server control?
Server controls are tags that are understood by the server. There are three kinds of server controls: HTML Server Controls – Traditional HTML tags. Web Server Controls – New ASP.NET tags. Validation Server Controls – For input validation.
What is ViewState explain with example?
View state is the method that the ASP.NET page framework uses to preserve page and control values between round trips. When the HTML markup for the page is rendered, the current state of the page and values that must be retained during postback are serialized into base64-encoded strings.
How do I turn off ViewState?
ViewState can be easily disabled for a particular control by setting EnableViewState property to False. ViewState can be disabled for the whole Page i.e. all controls on the Page by setting the EnableViewState property to False in the @Page Directive.
How do I remove ViewState?
- Retrieves the Value from ViewState. txtAddress.Text = (string)ViewState[“UserAddress”] or. txtAddress.Text = ViewState[“UserAddress”].ToString(); or. txtAddress.Text = Convert.ToString(ViewState[“UserAddress”]);
- Removes an item from ViewState. ViewState.Remove(“UserAddress”)
- Clear all items from ViewState. ViewState.Clear.
What is HTML server control?
The HTML server controls are HTML elements that include a runat=server attribute. The HTML server controls have the same HTML output and the same properties as their corresponding HTML tags. In addition, HTML server controls provide automatic state management and server-side events.
Which are server-side controls?
Server-side controls are often called server controls or Web Forms controls. There are four types of Server controls: HTML server controls. Web server controls, validation control, and user controls. HTML developers must be familiar with old HTML controls, which they use to write GUI applications in HTML.
What is ViewState in Salesforce?
View state holds the state/size of the visual force page that includes the components, field values, and controller state. This is important in the light that salesforce provides only a standard size of 135kb for any individual page.
What is ViewState in ASP Net web forms?
View State is the method that the ASP.NET page Framework uses to preserve page and control values between round trips. When the HTML markup for the page is rendered, the current state of the page and values should be retained during postback.
Why ViewState is not used in MVC?
there is no viewstate in MVC because its not required. a MVC view is a template engine, while webforms used a control tree. with webforms on postback the tree needed to rebuilt before postback values could be applied, and this often required viewstate.
What is the scope of ViewState?
Scope of ViewState ViewState data is only available across PostBacks for the specific Page and is lost when the Page is redirected even redirection is done to the same Page.
What does VIEWSTATE do on the server side?
ViewState is a client side mechanism. It stores the value in the page itself. Preserving the value of page controls between client to server and server to client is called “roundtrip”. It stores the page or control value in the mode of hidden fields.
Is the view state enabled for all server controls?
View state is enabled for all server controls by default, but there are circumstances in which you will want to disable it. For more information, see ASP.NET Performance Overview. For information about dictionaries and how to use them, see Collections and Data Structures.
What happens when VIEWSTATE is set to false?
The following server controls persist their information across requests even when the control ViewState (the EnableViewState attribute) is set to False: The TextBox control. The CheckBox control. The RadioButton control.
How does VIEWSTATE preserve the value of page controls?
Preserving the value of page controls between client to server and server to client is called “roundtrip”. It stores the page or control value in the mode of hidden fields. Viewing the source of the page allows you to find the ViewState signature but stores the value in encrypted format even though any programmer can de-encrypt the value.