Check validation before save in ASP.Net using JavaScript

@dharmendr

problem solved use this code sir

the validation working properly and then save the data.

thanks much for the help.

using javascript for validation 

    <script type="text/javascript">
        $(document).ready(function () {
            $(document).on('click', '[id*=btnModalAddDataPengambilan]', function () {

                var JmlPengambilan = $("[id*=txtjumlah_pengambilan]").val();
                var Saldo = $("[id*=txt_Saldo]").val();

                if (JmlPengambilan > Saldo) {
                    alert('The maximum amount taken must not be greater than the Balance Amount !!!')
                    return false
                }
                else if (JmlPengambilan >= Saldo) {
                    alert('The maximum amount of taken should not be less than the minimum balance of !!!  \n Minimum Balance must be prepared Rp. 50.000')
                    return false
                }
                else {
                    alert('OK... Data Valid...')
                    return true
                }
            });
        });
    </script>

then data saved properly

    protected void btnModalAddDataPengambilan_Click(object sender, EventArgs e)
    {
        ClientScript.RegisterStartupScript(this.GetType(), "PopUp", "MessageSucces();", true);
        AddDataPengambilan();
        ShowData();
    }

    private void AddDataPengambilan()
    {
        using (SqlConnection con = new SqlConnection(koneksi))
        {
            using (SqlCommand cmd = new SqlCommand("spAddPengambilan"))
            {
                try
                {
                    con.Open();
                    cmd.Connection = con;
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.AddWithValue("@id_pengambilan", txtid_pengambilan.Text.Trim());
                    cmd.Parameters.AddWithValue("@tanggal_pengambilan", txttanggal_pengambilan.Text.Trim());
                    cmd.Parameters.AddWithValue("@id_anggota", txtid_anggota.Text.Trim());
                    cmd.Parameters.AddWithValue("@jumlah_pengambilan", txtjumlah_pengambilan.Text.Trim());
                    cmd.Parameters.AddWithValue("@id_user", txtid_user.Text.Trim());
                    cmd.Parameters.AddWithValue("@id_perusahaan", txtid_perusahaan.Text.Trim());
                    cmd.ExecuteNonQuery();
                    con.Close();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
        }
    }