protected void Regbtn_Click(object sender, EventArgs e) { if (txtFName.Text != string.Empty && txtlname.Text != string.Empty && txtPassword.Text != string.Empty && txtusername.Text != string.Empty && txtemail.Text != string.Empty && txtdob.Text != string.Empty) { Userbll bll = new Userbll(); string gender = null; if (rdMale.Checked == true) { gender = "Male"; } else if (rdFemale.Checked == true) { gender = "Female"; } bool check = bll.isvalidsignup(txtFName.Text, txtlname.Text, txtusername.Text, txtPassword.Text, txtdob.Text, txtemail.Text, gender); if (check == true) { Response.Redirect("WebForm1.aspx"); } else { errorlabel.Text = "Username already Exists"; errorlabel.Visible = true; } } else { errorlabel.Text = "No field can be left empty"; errorlabel.Visible = true; } }