一般来说，，C#如果要实现自界说属性必需要需要实现接口ICustomTypeDescriptor，具体实现要领如下：
// 摘要: // 供给为东西供给动态自界说类型信息的接口。 public interface ICustomTypeDescriptor
示例如下:
/// <summary> /// 自界说属性东西 /// </summary> public class MyAttr { private string name = string.Empty; public string Name { get { return name; } set { name = value; } } private object value = null; public object Value { get { return this.value; } set { this.value = value; } } private string description = string.Empty; public string Description { get { return description; } set { description = value; } } public override string ToString() { return string.Format("Name:{0},Value:{1}",name.ToString(),value.ToString()); } } /// <summary> /// 自界说性质描述类 /// </summary> public class MyPropertyDescription : PropertyDescriptor { private MyAttr myattr = null; public MyPropertyDescription(MyAttr myattr, Attribute[] attrs): base(myattr.Name, attrs) { this.myattr = myattr; } public override bool CanResetValue(object component) { return false; } public override Type ComponentType { get { return this.GetType(); } } public override object GetValue(object component) { return myattr.Value; } public override bool IsReadOnly { get { return false; } } public override Type PropertyType { get { return myattr.Value.GetType(); } } public override void ResetValue(object component) { //不重置，无行动 } public override void SetValue(object component, object value) { myattr.Value = value; } /// <summary> /// 是否应该长期化生存 /// </summary> /// <param></param> /// <returns></returns> public override bool ShouldSerializeValue(object component) { return false; } /// <summary> /// 属性说明 /// </summary> public override string Description { get { return myattr.Description; } } } /// <summary> /// 实现自界说的特殊属性东西必需担任ICustomTypeDescriptor,并实现Dictionary /// </summary> public class MyAttrCollection : Dictionary<String, MyAttr>, ICustomTypeDescriptor { /// <summary> /// 重写Add要领 /// </summary> /// <param></param> public void Add(MyAttr attr) { if (!this.ContainsKey(attr.Name)) { base.Add(attr.Name, attr); } } public AttributeCollection GetAttributes() { return TypeDescriptor.GetAttributes(this, true); } public string GetClassName() { return TypeDescriptor.GetClassName(this,true); } public string GetComponentName() { return TypeDescriptor.GetClassName(this, true); } public TypeConverter GetConverter() { return TypeDescriptor.GetConverter(this, true); } public EventDescriptor GetDefaultEvent() { return TypeDescriptor.GetDefaultEvent(this, true); } public PropertyDescriptor GetDefaultProperty() { return TypeDescriptor.GetDefaultProperty(this, true); } public object GetEditor(Type editorBaseType) { return TypeDescriptor.GetEditor(this, editorBaseType, true); } public EventDescriptorCollection GetEvents(Attribute[] attributes) { return TypeDescriptor.GetEvents(this, attributes, true); } public EventDescriptorCollection GetEvents() { return TypeDescriptor.GetEvents(this, true); } public PropertyDescriptorCollection GetProperties(Attribute[] attributes) { int count=this.Values.Count; PropertyDescriptor[] pds=new PropertyDescriptor[count]; int index = 0; foreach (MyAttr item in this.Values) { pds[index] = new MyPropertyDescription(item,attributes); index++; } return new PropertyDescriptorCollection(pds); } public PropertyDescriptorCollection GetProperties() { return TypeDescriptor.GetProperties(this,true); } public object GetPropertyOwner(PropertyDescriptor pd) { return this; } }
前台挪用如下图所示：
private void btnAddProperType_Click(object sender, EventArgs e) { MyAttr attr = new MyAttr(); attr.Name = txtName.Text.Trim(); attr.Value = txtValue.Text.Trim(); attr.Description = txtDescription.Text.Trim(); mac.Add(attr); MyGrid.Refresh(); } private void button1_Click(object sender, EventArgs e) { AddAttrColor(); AddAttrImage(); AddAttrEmun(); MyGrid.Refresh(); } private void AddAttrEmun() { MyAttr attr = new MyAttr(); attr.Name = "Dock"; attr.Value = DockStyle.Fill; attr.Description = "枚举"; mac.Add(attr); } private void AddAttrImage() { MyAttr attr = new MyAttr(); attr.Name = "Image"; attr.Value = new Bitmap(400,300); attr.Description = "图片"; mac.Add(attr); } private void AddAttrColor() { MyAttr attr = new MyAttr(); attr.Name = "Color"; attr.Value = Color.Red; attr.Description = "颜色"; mac.Add(attr); }
运行效果如下图所示：
