Registers a hidden field for every asynchronous postback by using the ScriptManager control.
Syntax
CSharp
public static void RegisterHiddenField (
Page page,
string hiddenFieldName,
string hiddenFieldInitialValue
)
VisualBasic
Public Shared Sub RegisterHiddenField ( _
page As Page, _
hiddenFieldName As String, _
hiddenFieldInitialValue As String _
)
ManagedCPlusPlus
public:
static void RegisterHiddenField (
Page^ page,
String^ hiddenFieldName,
String^ hiddenFieldInitialValue
)
JSharp
public static void RegisterHiddenField (
Page page,
String hiddenFieldName,
String hiddenFieldInitialValue
)
Parameters
- page (Page)
The Page object that is registering the hidden field.
- hiddenFieldName (String)
The name of the hidden field to register.
- hiddenFieldInitialValue (String)
The initial value of the hidden field to register.
Remarks
The RegisterHiddenField method is used to a register a hidden field that is compatible with partial-page rendering and that has no Microsoft AJAX Library dependencies. This method registers the hidden field each time an asynchronous postback occurs. To register a hidden field for a control that is inside an UpdatePanel control so that the field is registered only when the panel is updated, use the RegisterHiddenField(Control, String, String) overload of this method. If you are registering a hidden field that does not pertain to partial-page updates and you want to register a hidden field only one time during initial page rendering, use the RegisterHiddenField(String, String) method of the ClientScriptManager class. You can get a reference to the ClientScriptManager object from the ClientScript property of the page.
Exceptions
| Exception | Condition |
|---|
| ArgumentNullException | The page that is registering the hidden field is null. - or - hiddenFieldName is null. |
Assembly: System.Web.Extensions (Module: System.Web.Extensions)