get info from one page and show it on other page - asp.net

Question

i m working on shopping cart site
i want to show complete information of a product contained in a div section. on an other page. i have may div that contained information.
goal is to get the info on a new page when user clicks some product's image.
Error:
Control 'MainContent_ImageButton1' of type 'ImageButton' must be placed inside a form tag with runat=server.
HTML:
<div id="physics" runat="server">
<h3>High School Physics</h3>
<%-- <img src="images/Book.jpg" /> --%>
<asp:ImageButton ID="ImageButton1"
src="images/Book.jpg" runat="server" onclick="ImageButton1_Click" />
<p> Book Description Goes Here
<br />
<asp:Label ID="Label1" runat="server" Text="Label">PKR 770/-</asp:Label>
<br />
<asp:TextBox ID="TextBox1" Text="1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Add" />
</p>
</div>
Code :
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
StringWriter sw = new StringWriter();
HtmlTextWriter w = new HtmlTextWriter(sw);
physics.RenderControl(w);
Session["mySessionVar"] = sw.GetStringBuilder().ToString();
Response.Redirect("ShowLarge.aspx", true);
}
HTML: where i want to show this info
<div id="ShowInLargeView" runat="server">
</div>
Code:
protected void Page_Load(object sender, EventArgs e)
{
ShowInLargeView.InnerHtml = (String)Session["mySessionVar"];
}
i want to show the complete info of Div in an other page. i m getting an error. this scenario is about shopping cart
i need help
please help.

Answer 1

The error you are getting is related to the fact that you are trying to add an event handler
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
In order to add an event handler to an element on your page it will need to be encapsulated in a 'form' with the runat="server" attribute. this will result in the click event of the ImageButton ending up in your code-behind.
so your aspx would become something like :
<form runat="server">
<div id="physics" runat="server">
<h3>High School Physics</h3>
<%-- <img src="images/Book.jpg" /> --%>
<asp:ImageButton ID="ImageButton1"
src="images/Book.jpg" runat="server" onclick="ImageButton1_Click" />
<p> Book Description Goes Here
<br />
<asp:Label ID="Label1" runat="server" Text="Label">PKR 770/-</asp:Label>
<br />
<asp:TextBox ID="TextBox1" Text="1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Add" />
</p>
</div>
</form>
In general it should suffice to encapsulate your entire page in a form tag, this way all events will be passed to your code-behind.