Control.ViewState Property
Assembly: System.Web (in system.web.dll)
'Declaration Protected Overridable ReadOnly Property ViewState As StateBag 'Usage Dim value As StateBag value = Me.ViewState
/** @property */ protected StateBag get_ViewState ()
protected function get ViewState () : StateBag
Not applicable.
Property Value
An instance of the StateBag class that contains the server control's view-state information.A server control's view state is the accumulation of all its property values. In order to preserve these values across HTTP requests, ASP.NET server controls use this property, which is an instance of the StateBag class, to store the property values. The values are then passed as a variable to an HTML hidden input element when subsequent requests are processed. For more information about saving server control view state, see ASP.NET State Management.
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 Developing High-Performance ASP.NET Applications.
For information about dictionaries and how to use them, see Collections and Data Structures.
| Topic | Location |
|---|---|
| How to: Save Values in View State | Building ASP .NET Web Applications |
| How to: Read Values from View State | Building ASP .NET Web Applications |
| How to: Save Values in View State | Building ASP .NET Web Applications |
| How to: Read Values from View State | Building ASP .NET Web Applications |
The following example demonstrates implementing a Text property that stores and retrieves its value from its control's ViewState property.
' Add property values to view state with set; ' retrieve them from view state with get. Public Property [Text]() As String Get Dim o As Object = ViewState("Text") If (IsNothing(o)) Then Return String.Empty Else Return CStr(o) End If End Get Set(ByVal value As String) ViewState("Text") = value End Set End Property
// Add property values to view state with set;
// retrieve them from view state with get.
/** @property
*/
public String get_Text()
{
return ((String)(get_ViewState().get_Item("Text")));
} //get_Text
/** @property
*/
public void set_Text(String value)
{
get_ViewState().set_Item("Text", value);
} //set_Text
// Add property values to view state with set; // retrieve them from view state with get. public function get Text() : String { return String(ViewState["Text"]); } public function set Text(value : String) { ViewState["Text"] = value; }
Reference
Control ClassControl Members
System.Web.UI Namespace
StateBag