把别人的例子稍做了一下修改，部分内容没看懂，但程序可以运行，如果有什么错误或不当之处，请指教！
1 /// <summary>
2 /// 一.自定义一个特性类ListAttribute,提供下拉列表值:
3 /// </summary>
4 public class ListAttribute : Attribute
5 {
6 public string[] _lst;
7
8 public ListAttribute(string[] lst)
9 {
10 //初始化列表值
11 _lst =lst;
12 }
13 }
14
15 /// <summary>
16 /// 二.特性转换器MyConverter
17 /// </summary>
18 public class MyConverter : ExpandableObjectConverter
19 {
20 public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
21 {
22 return true;
23 }
24
25 public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
26 {
27 return true;
28 }
29
30 public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
31 {
32 ListAttribute listAttribute = (ListAttribute)context.PropertyDescriptor.Attributes[typeof(ListAttribute)];
33 StandardValuesCollection vals = new TypeConverter.StandardValuesCollection(listAttribute._lst);
34
35 return vals;
36 }
37
38 public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
39 {
40 return true;
41 }
42 }
43
44 /// <summary>
45 /// 三.应用示例：
46 /// </summary>
47 public class MyObject
48 {
49 private string _name;
50
51 [CategoryAttribute("信息"), DescriptionAttribute("姓名"),
52 TypeConverter(typeof(MyConverter)), ListAttribute( new string[] { "张三", "李四", "王五", "赵六", "马七" })]
53 public string Name
54 {
55 get { return _name; }
56 set { _name = value; }
57 }
58 }
59
60 private void Form1_Load(object sender, EventArgs e)
61 {
62 this.propertyGrid1.SelectedObject = new MyObject();
63 }
显示效果如下:
