UserControl.IsPostBack Property

.NET Framework (current version)
 

Gets a value indicating whether the user control is being loaded in response to a client postback, or if it is being loaded and accessed for the first time.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

C#
C++
F#
VB
Copy 
<BrowsableAttribute(False)>
Public ReadOnly Property IsPostBack As Boolean

Property Value

Type: System.Boolean

true if the user control is being loaded in response to a client postback; otherwise, false.

The following example adds two key value pairs to the application state associated with a user control if the user control's IsPostBack property returns false. When this condition is met, the code uses the Add method, through the user control's Application property, to add the keys and their values.

C#
VB
Copy 
If (Not myControl.IsPostBack) Then
  ' Add new objects to the HttpApplicationState.
  ' These will be maintained as long as the as the application is active.
  myControl.Application.Add("Author","Shafeeque")                
  myControl.Application.Add("Date",new DateTime(2001,6,21))
  ' Add an object to the cache with expirations
  ' set to 0.1 minute.
  myControl.Cache.Insert("MyData1", "somevalue", Nothing, DateTime.Now.AddMinutes(0.1), Cache.NoSlidingExpiration)

.NET Framework
Available since 1.1
Return to top
Show: