demo.aspx
<html xmlns="http://www.w3.org/1999/
Example on Updatepane
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Timer ID="Timer1" runat="server" Interval="3000" OnTick="Timer_Tick">
</asp:Timer>
<br />
sample...
<br />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Timer1" />
</Triggers>
<ContentTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl="~/powered.png" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
deom.aspx.cs
protected void Timer_Tick(object sender, EventArgs e)
{
string a = Convert.ToString( new Random().Next(1, 5));
Image1.ImageUrl = "img1/"+ a +".png";
}
Example on Updatepane
<html xmlns="http://www.w3.org/1999/
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" Text="Button"
onclick="Button1_Click1" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
<asp:Image runat="server" ImageUrl="~/Processing.gif"></
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>
Update Panel con AJAX C#
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<br />
&
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
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