WebPart Complex Property

下面代碼是實現一個Dropdown，同時實現其同步變化。代碼如下：

Complex Property

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;


//建立下拉式清單控制項
        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);
        }
//將WebPart的值同步到下拉控制項
        public override void SyncChanges()
        {
this.EnsureChildControls();
            ComplexProperty wp = (ComplexProperty)this.WebPartToEdit;
            _dlValueList.SelectedValue = wp.FirstName;
        }
//將下拉控制項選擇的值應用到WebPart
        public override bool ApplyChanges()
        {
this.EnsureChildControls();
            ComplexProperty wp = (ComplexProperty)this.WebPartToEdit;
            wp.FirstName = _dlValueList.SelectedValue;
return true;
        }
    }

}