How to build a page URL from database in ASP.Net

I can write this code in Page load 

con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString); da = new SqlDataAdapter("Select URL from Table1 where ID =" + Session["USERID"], con); cb = new SqlCommandBuilder(da); ds = new DataSet(); da.Fill(ds, "Table1"); string pageUrl = ds.Tables["Table1"].Rows[0]["URL"].ToString();

Response.Redirect(pageUrl);

This code working fine

I want to this code working on Hyperlink click

Like below

<li><a href="http://Mysite.azurewebsites.net/?ID=<%=Session["USERID"]%>" target="_blank">URLS</a></li>

How can i modify my code?