Please short out the query

try this:

if (rbtmale.Checked == true)
        {
            rbtngender = "male";
        }
        else if (rbtfemale.Checked == true)
        {
            rbtngender = "female";
        }
        if (txtfirstname.Text == "" || txtfirstname.Text == null)
        {
            lblName.Text = "Please Enter the First Name";
            return;
        }
        else if (txtmiddlename.Text == "" || txtmiddlename.Text == null)
        {
            lblName.Text = "Please enter the middle name";
            return;
        }
        else if (txtlastname.Text == "" || txtlastname.Text == null)
        {
            lblName.Text = "Please enter the last name";
            return;
        }
        else
        {
            lblName.Text = "";
        }
        if (emailid.Text == "" || emailid.Text == null)
        {

            lblemailid.Text = "Please enter the emailid";
            lblName.Text = "";
            return;
        }
        else
        {
            lblemailid.Text = "";    // Hear its give error how can resolve
        }


        con.Open();
        SqlCommand cmd = new SqlCommand("sp_ins_register", con);
        cmd.CommandType = CommandType.StoredProcedure;

        cmd.Parameters.AddWithValue("@First_name", txtfirstname.Text);
        cmd.Parameters.AddWithValue("@Middle_name", txtmiddlename.Text);
        cmd.Parameters.AddWithValue("@Last_name", txtlastname.Text);
        cmd.Parameters.AddWithValue("@Email_id", emailid.Text);
        cmd.Parameters.AddWithValue("@Mob_no", txtmobileno.Text);
        cmd.Parameters.AddWithValue("@pwd", txtpassword.Text);
        cmd.Parameters.AddWithValue("@Gender", rbtngender);
        cmd.Parameters.AddWithValue("@Education", TextEducation.Text);
        cmd.Parameters.AddWithValue("@photo", fluphoto1);
        cmd.Parameters.AddWithValue("@country", ddlcountry.SelectedValue);
        cmd.Parameters.AddWithValue("@state", ddlstate.SelectedValue);
        cmd.Parameters.AddWithValue("@city", ddlcity.SelectedValue);
        cmd.Parameters.AddWithValue("@address", txtaddress.Text);
        cmd.ExecuteNonQuery();
        con.Close();
        registerbind();
        txtfirstname.Text = "";
        txtmiddlename.Text = "";
        txtlastname.Text = "";
        emailid.Text = "";
        txtmobileno.Text = "";
        txtpassword.Text = "";
        TextEducation.Text = "";
        ddlcountry.SelectedIndex = 0;
        ddlstate.SelectedIndex = 0;
        ddlcity.SelectedIndex = 0;
        txtaddress.Text = "";
        txtfirstname.Focus();