WebPart Complex Property

下面代码是实现一个Dropdown，同时实现其同步变化。代码如下：

using System;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.ComponentModel;
using System.Collections;

namespace WebPartCollection
{
    [Guid("cf18e6af-3ab5-4503-8a41-c24ac8d38566")]
    public class ComplexProperty : System.Web.UI.WebControls.WebParts.WebPart
    {
        public ComplexProperty()
        {
        }
        private string _FirstName;
        [Personalizable]
        [WebBrowsable(true)]
        [Category("Name")]
        [WebDisplayName("FirstName")]
        public string FirstName
        {
            get { return _FirstName; }
            set { _FirstName = value; }
        }
        private string _LastName;
        [Personalizable]
        [WebBrowsable(true)]
        [Category("Name")]
        [WebDisplayName("LastName")]
        public string LastName
        {
            get { return _LastName; }
            set { _LastName = value; }
        }

        protected override void Render(HtmlTextWriter writer)
        {
            base.Render(writer);
        }
        public override EditorPartCollection CreateEditorParts()
        {
            ArrayList editorArray = new ArrayList();

            WebPartProperty1EditPart edPart = new WebPartProperty1EditPart();
            edPart.ID = "WebPartProperty1EditPart1";
            editorArray.Add(edPart);

            EditorPartCollection initEditorParts = base.CreateEditorParts();

            EditorPartCollection editorParts = new EditorPartCollection(initEditorParts, editorArray);

            return editorParts;
        }
        protected override void CreateChildControls()
        {
         
            base.CreateChildControls();

        }
    }

    public class WebPartProperty1EditPart : EditorPart
    {
        private DropDownList _dlValueList;
        private Label _lbCompany;


        //创建下拉列表控件
        protected override void CreateChildControls()
        {
            _lbCompany = new Label();
            _lbCompany.Text = "Company Name: ";

            _dlValueList = new DropDownList();
            _dlValueList.Items.Add("Carat");
            _dlValueList.Items.Add("HR");

            this.Controls.Add(_lbCompany);
            this.Controls.Add(new LiteralControl("<br/>"));
            this.Controls.Add(_dlValueList);
        }
        //将WebPart的值同步到下拉控件
        public override void SyncChanges()
        {
            this.EnsureChildControls();
            ComplexProperty wp = (ComplexProperty)this.WebPartToEdit;
            _dlValueList.SelectedValue = wp.FirstName;
        }
        //将下拉控件选择的值应用到WebPart
        public override bool ApplyChanges()
        {
            this.EnsureChildControls();
            ComplexProperty wp = (ComplexProperty)this.WebPartToEdit;
            wp.FirstName = _dlValueList.SelectedValue;
            return true;
        }
    }

}