ASP.NET How ViewState works

Question

I have a textbox and button on my .aspx page. The EnableViewState property of the textbox is set to false. But when I enter some text in the textbox and click the button the

Answer 1

This is by design

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.

This behavior occurs because the ViewState of a control is only one of the methods that are used to persist a control's attributes across requests. In the server controls that are mentioned in the "Symptoms" section, attributes that are not normally posted to the server through the form-get or the form-post are handled by the ViewState. These values include attributes of the control, such as BackColor. Attributes that are normally posted to the server are handled by the IPostBackDataHandler interface. An example of such an attribute is the checked attribute of the CheckBox control.

Also read this article

ASP.NET: TextBox and EnableViewState="False"

For understanding of Viewstate I don't think there is a better article than MSDN

Understanding ASP.NET View State