﻿using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.Web.DynamicData;

namespace DynamicDataAdmin
{
    public partial class ForeignKey_EditField : System.Web.DynamicData.FieldTemplateUserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (DropDownList1.Items.Count == 0)
            {
                if (!Column.IsRequired)
                {
                    DropDownList1.Items.Add(new ListItem("[Not Set]", ""));
                }

                PopulateListControl(DropDownList1);
            }
        }

        protected override void OnDataBinding(EventArgs e)
        {
            base.OnDataBinding(e);

            if (Mode == DataBoundControlMode.Edit)
            {
                string foreignkey = ForeignKeyColumn.GetForeignKeyString(Row);
                ListItem item = DropDownList1.Items.FindByValue(foreignkey);
                if (item != null)
                {
                    DropDownList1.SelectedValue = foreignkey;
                }
            }
        }

        protected override void ExtractValues(IOrderedDictionary dictionary)
        {
            // If it's an empty string, change it to null
            string val = DropDownList1.SelectedValue;
            if (val == String.Empty)
                val = null;

            ExtractForeignKey(dictionary, val);
        }

        public override Control DataControl
        {
            get
            {
                return DropDownList1;
            }
        }
    }
}
