Question

 <asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" ChildrenAsTriggers="true"   
 runat="server">
  <ContentTemplate> 
     <asp:ImageButton ID="imagebutton1" runat="server" ImageUrl="~/image.jpg" Width="125" 
     Height="125"  onclick="imagebutton1_Click" />
     <asp:Timer ID="timer1" runat="server" Interval="10000" ontick="timer1_Tick" />
     <asp:Label ID="label1" Visible="false" runat="server" Text="" />
  </ContentTemplate>
</asp:UpdatePanel>

If I don’t use an update panel the whole page refreshes.

protected void imagebutton1_Click(object sender, ImageClickEventArgs e){
    string link = label1.Text;
    Page.ClientScript.RegisterStartupScript(this.GetType(), "OPEN", "window.open(" + link +   
    ",'mywindow','width=200,height=200,');", true);
}

This is the variable “link” here in the timer handler

Random r = new Random();

if (datatable1.Rows.Count > 0)
{
    int randomnumber = r.Next(0, i);
    DataRow datarow1= datatable1.Rows[randomnumber ];
    imagebutton1.ImageUrl = (String)datarow1["image"];
    imagebutton1.DataBind();
    label1.Text = (String)datarow1["Link"];
}

Answer 1

I had to just add postback triggers as shown below in the updatepanel to make it work.

<Triggers>
<asp:PostBackTrigger  ControlID="ImageButton"/>
</Triggers>