NavigateUrl in ASP.Net - asp.net

Question

I am new to ASP.NET. I am having problem with NavigateUrl.
<td align="right" valign="middle">
<p id="posCstmr">
<asp:HyperLink ID="hlnkContact" CssClass="addbtn-cmplist" runat="server" NavigateUrl='<%# "Actions/Contact.aspx?ContactID=" + Eval("ContactID") + "&CompanyID=" + Eval("CompanyID") %>' Text="View"></asp:HyperLink>
</p>
</td>
When I click to view following hlnkContact, it redirects to the following link with specified values which is OK.
[http://localhost:1426/Actions/Contact.aspx?ContactID=78724&CompanyID=92971]
But I want to store these values in session variables on Page_load event of Contact.aspx.
if (!Page.IsPostBack)
{
Session["ContactID"] = String.IsNullOrEmpty(Request.QueryString["ContactID"].ToString()) ? String.Empty : Session["ContactID"];
}
But I cant store the Session variable on Page_Load because NavigateUrl show the values after loading of this page.
Please Help me.

Answer 1

Same type of question was answered HERE, you can tweak like below:
[Assuming that the td is inside any databound container, else Eval wouldn't work]
Change your markup to this:
<td align="right" valign="middle">
<p id="posCstmr">
<asp:LinkButton ID="LinkButton1" CssClass="addbtn-cmplist" runat="server"
Text="View" CommandName="Link" CommandArgument='<%#Eval("ContactID") + ";" + Eval("CompanyID") %>'
OnClick="ButtonLink_Click" />
</p>
</td>
Code:
protected void ButtonLink_Click(object sender, System.EventArgs e)
{
LinkButton lb = (LinkButton)sender;
string[] arguments = lb.CommandArgument.Split(';');
string ContactID = arguments[0];
string CompanyID = arguments[1];
//Save in session
Session["ContactID"] = ContactID ;
Session["CompanyID"] = CompanyID ;
//Redirect
Response.Redirect(string.Format("Actions/Contact.aspx?ContactID={0}&CompanyID={1}", ContactID, CompanyID));
}