Set and get Image Url from Season using C# in ASP.Net

hello,

I would like make a season for image to open new window in ASP.Net.

I am follwing this Display user data with picture (image) on AutoComplete selection using C# and Generic Handler in ASP.Net

C# 

        protected void Buttonrm0_Click(object sender, EventArgs e)
        {
            Session["Gender"] = RadioButtonList5.SelectedValue; //الموظف / المدير
            Session["Gender2"] = RadioButtonList2.SelectedValue; // بداية نهاية
            //total
            Session["rsmonth0"] = rsmonth0.Text;
            Session["rsmtotal0"] = rsmtotal0.Text;

            //date
            Session["rsmdate"] = TextBox18.Text; // التاريخ
            Session["rsmtime"] = TextBox17.Text; // الوقت

            //data user
            Session["name"] = txtUsername.Text; // الاسم
            Session["filenumber"] = filenumber.Text; // رقم الملف
            Session["location"] = txtSearch2.Text; // الموقع
            Session["markazel3mel"] = markazel3mel.Text; // القسم
            Session["civilid"] = civilid.Text; // الرقم المدني

            string url = "/Admin/rasmi.aspx";
            string s = "window.open('" + url + "', 'popup_window', 'width=800,height=950,left=100,top=100,resizable=yes');";
            ClientScript.RegisterStartupScript(this.GetType(), "script", s, true);
        }

        protected void Searchdata2()
        {
            try
            {
                String constring = ConfigurationManager.ConnectionStrings["kankonConnectionString"].ConnectionString;
                SqlConnection sqlcon = new SqlConnection(constring);
                String pname = "Insert_Userupdate2"; ;
                sqlcon.Open();
                SqlCommand com = new SqlCommand(pname, sqlcon);
                com.CommandType = CommandType.StoredProcedure;
                com.Parameters.AddWithValue("namelocation", txtSearch2.Text);
                SqlDataReader rdr;
                rdr = com.ExecuteReader();
                if (rdr.Read())
                {
                    txtSearch2.Text = rdr["namelocation"].ToString();
                    byte[] bytes = null;
                    System.Drawing.ImageConverter converter = new System.Drawing.ImageConverter();
                    System.Drawing.Image img = (System.Drawing.Image)converter.ConvertFrom((byte[])rdr["filelocation"]);
                    using (MemoryStream ms = new MemoryStream())
                    {
                        img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                        bytes = ms.ToArray();
                    }
                    string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
                    im1.ImageUrl = "data:image/png;base64," + base64String;
                }
                else
                {
                    txtUsername.Text = "";
                    civilid.Text = "";
                    ClientScript.RegisterClientScriptBlock(GetType(), "alert", "alert('" + "no data\\n " + txtSearch2.Text.ToString() + "');", true);
                }
                sqlcon.Close();
            }
            catch (Exception)
            {
            }
        }