obtain value from users table and use this to set the option in drop down list on another form

[shortsam1]

I am trying to obtain a value set in the user table (this value is set via a drop down list) and have this value automatically set a value in another drop down list in another form on opening of the form. So far my code is as follows but I get a script error. This is my first project is asp and serenity.

this is the error message:

PSwitchDialog.ts

namespace OnlineForms.PSwitch {
    @Serenity.Decorators.registerClass()
    export class PSwitchDialog extends Serenity.EntityDialog<PSwitchRow, any> {
        protected getFormKey() { return PSwitchForm.formKey; }
        protected getIdProperty() { return PSwitchRow.idProperty; }
        protected getLocalTextPrefix() { return PSwitchRow.localTextPrefix; }
        protected getNameProperty() { return PSwitchRow.nameProperty; }
        protected getService() { return PSwitchService.baseUrl; }
        protected getDeletePermission() { return PSwitchRow.deletePermission; }
        protected getInsertPermission() { return PSwitchRow.insertPermission; }
        protected getUpdatePermission() { return PSwitchRow.updatePermission; }

        protected form = new PSwitchForm(this.idPrefix);

        constructor() {
            super();
     }

        protected afterLoadEntity(): void {
            super.afterLoadEntity();

            if (this.isNew()) {
                var ud = Authorization.userDefinition;
                this.form.HpId.value = Administration.UserRow.getLookup().itemById['ud.DefaultHpId'].DefaultHpId.toString();
            }
        }
        protected updateInterface(): void {
            super.updateInterface();
        }
    }
}

ScriptUserDefinition.cs

using Serenity.ComponentModel;
using System;
using System.Collections.Generic;

namespace OnlineForms
{
    /// <summary>
    /// This data will be available from script code using a dynamic script.
    /// Add properties you need from script code and set them in UserEndpoint.GetUserData.
    /// </summary>
    [ScriptInclude]
    public class ScriptUserDefinition
    {
        public String Username { get; set; }
        public String DisplayName { get; set; }
        public Int32 DefaultHpId { get; set; }
        public Boolean IsAdmin { get; set; }
        public Dictionary<string, bool> Permissions { get; set; }
    }
}

PSwitchForm.cs

using Serenity;
using Serenity.ComponentModel;
using Serenity.Data;
using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.IO;

namespace OnlineForms.PSwitch.Forms
{
    [FormScript("PSwitch.PSwitch")]
    [BasedOnRow(typeof(Entities.PSwitchRow), CheckNames = true)]
    public class PSwitchForm
    {
        public Int32 HpId { get; set; }
        [DateTimeEditor]
        public DateTime CallDateTime { get; set; }
        public Int32 CallMadeId { get; set; }
        public Int32 WId { get; set; }
        public String BNumber { get; set; }
        public Int32 CallMethod { get; set; }
        public Int32 CallMethod2 { get; set; }
        public Int16 IsActive { get; set; }
        public DateTime InsertDate { get; set; }
        public Int32 InsertUserId { get; set; }
        public DateTime UpdateDate { get; set; }
        public Int32 UpdateUserId { get; set; }
    }
}

[VictorTomaili]

.itemById['ud.DefaultHpId'] this key is used as string. you need to use .itemById[ud.DefaultHpId] instead.

[shortsam1]

I tried that but it did not work

[shortsam1]

This is the code that ended up working for me.
if (this.isNew()) { var ud = Authorization.userDefinition; this.form.HospitalId.value = ud.DefaultHospital.toString(); }