A small example of Ajax application in ASP. NET

Recently, many people on the CSDN Forum asked about ajax in ASP. NET applications, and problems are constantly being mentioned. Many experts have also published many professional technical documents. I am also ugly today, and I will give you a simple and easy-to-understand example...
First, we will introduce several professional terms:
Ajax: AJAX is "Asynchronous JavaScript and XML" (Asynchronous JavaScript and XML). AJAX is not a acronym, but a term created by Jesse James Gaiiett, this is a web development technology used to create interactive web applications.
Common Ajax controls in Visual studio 2008:
ScriptManager control: Manages Ajax server controls in pages and is the core control of Ajax.
UpdatePanel control: Implements asynchronous update of containers so that server controls that cannot be asynchronously updated implement Ajax functions.
Timer control: Timer is a Timer, but it is not only difficult but also resource-consuming in ASP.net.
After the component is introduced, paste the following code:
Front-end Html code and server-side controls
Html code
<Form id = "form1" runat = "server">

<Asp: ScriptManager ID = "ScriptManager1" runat = "server">
</Asp: ScriptManager>
<Asp: Timer ID = "Timer1" runat = "server" ontick = "Timer1_Tick">
</Asp: Timer>
<Div>
<Asp: UpdatePanel ID = "UpdatePanel1" runat = "server">
<Triggers>
<Asp: AsyncPostBackTrigger ControlID = "Timer1" EventName = "Tick"/>
</Triggers>
<ContentTemplate>
<Asp: Label ID = "Label1" runat = "server" Text = "Label"> </asp: Label>
</ContentTemplate>
</Asp: UpdatePanel>
</Div>
</Form>
Background C # code
Csharp code
Protected void Page_Load (object sender, EventArgs e)
{
Databing ();
}
Protected void timereffectick (object sender, EventArgs e)
{
Timer1.integer = 5000;
}
Private void databing ()
{
Label1.Text = DateTime. Now. ToString ();
}

To dynamically update pages within 5 seconds, it is not necessarily possible to achieve this at the beginning of the operation because of the high overhead.
Timer1.integer = 5000
The value here is the number of milliseconds, 1 second = 1000 milliseconds

 

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