public string ejecuta(string query)
    {
        string        devuelt = "";
        SqlCommand    cm      = new SqlCommand(query, c.AbrirConexion());
        SqlDataReader dr      = cm.ExecuteReader();

        while (dr.Read())
        {
            devuelt = dr[0].ToString();
            nombre  = dr[1].ToString();
        }
        c.CerrarConexion();
        return(devuelt);
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        conexion c = new conexion();

        if (!string.IsNullOrEmpty(Session["nombre"] + ""))
        {
            SqlCommand cm = new SqlCommand("insert into regstro (" + 1 + ",'" + Session["entrada"] + "','" + Session["salida"] + "')", c.AbrirConexion());
            cm.ExecuteNonQuery();
            Label1.Text = "Registro exitoso";
        }
        else
        {
            ScriptManager.RegisterStartupScript(this, typeof(Page), "Información", "alert('Debe Iniciar sesión')", true);
        }
    }
    protected void registrar(object sender, EventArgs e)
    {
        if (!string.IsNullOrEmpty(TextBox6.Text) && !string.IsNullOrEmpty(TextBox1.Text) && !string.IsNullOrEmpty(TextBox2.Text) && !string.IsNullOrEmpty(TextBox3.Text) && !string.IsNullOrEmpty(TextBox4.Text) && !string.IsNullOrEmpty(TextBox5.Text) && !string.IsNullOrEmpty(DropDownList1.Text) && !string.IsNullOrEmpty(TextBox7.Text) && !string.IsNullOrEmpty(TextBox8.Text))
        {
            if (!TextBox7.Text.Equals(TextBox8.Text))
            {
                Label10.Text = "Las contraseñas no coinciden";
                return;
            }

            conexion   c  = new conexion();
            SqlCommand cm = new SqlCommand("insert into Usuario values('" + TextBox6.Text + "','" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "'," + TextBox4.Text + "," + TextBox5.Text + ",'" + DropDownList1.Text + "','" + TextBox7.Text + "')", c.AbrirConexion());
            cm.ExecuteNonQuery();
            Label10.Text = "¡Registro Exitoso!";
        }
        else
        {
            Label10.Text = "Diligencie todos los campos";
        }
    }