UserControl.IsPostBack Property
Definition
Important
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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.
public:
property bool IsPostBack { bool get(); };
[System.ComponentModel.Browsable(false)]
public bool IsPostBack { get; }
[<System.ComponentModel.Browsable(false)>]
member this.IsPostBack : bool
Public ReadOnly Property IsPostBack As Boolean
Property Value
true
if the user control is being loaded in response to a client postback; otherwise, false
.
- Attributes
Examples
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.
if (!myControl.IsPostBack)
{
// Add new objects to the HttpApplicationState.
// These will be maintained as long 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", null, DateTime.Now.AddMinutes(0.1), Cache.NoSlidingExpiration);
}
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)
Applies to
See also
.NET
피드백
https://aka.ms/ContentUserFeedback
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