here i am passing session id, to another page there capturing id to display some content.

But i am getting error as "Object reference not set to an instance of an object." while capturing id in redirected page.

<asp:HyperLink ID="myHyperlink"   Text='<%# Eval("PersonName") %>' NavigateUrl='<%# Eval("ImageId", "~/Display.aspx?")%>' runat="server"></asp:HyperLink>
                             

i have doubt near navigate url field.

captured the same in display.aspx as,

string strImageid = (string)Session["ImageId"].ToString();         if (strImageid != null)

{

some.....

}

can you help me in this error.....