标签：Winform

1. 动态对象

// 动态对象实现
    [TypeConverter(typeof(CategoriesSortedByClassDefinitionConverter)), CategoriesSortedByClassDefinitionConverter.ElementsSameOrder]
    public class DynamicObject : ICustomTypeDescriptor
    {
        /// <summary>
        /// 项目的英文名称
        /// </summary>
        public string CustomName { set; get; }
        public object TagInfo { get; set; }

        // private PropertyCollection _properties = new PropertyCollection();
        private List<DynamicProperty> _properties = new List<DynamicProperty>();
        private List<string> _categoryList = new List<string>();

        public void AddProperty(string name, object value, string displayName = null, string description = null, string cateogry = "属性", bool readOnly = false, Type converterType = null, bool browsable = true, TypeConverter typeConverter = null)
        {
            _properties.Add(new DynamicProperty(name, value, displayName, description, cateogry, readOnly, converterType, browsable, typeConverter));
            if (!string.IsNullOrEmpty(cateogry) && !_categoryList.Contains(cateogry))
            {
                _categoryList.Add(cateogry);
            }
        }

        public object GetPropertyOwner(PropertyDescriptor pd) => this;

        /// <summary>
        /// 返回属性的集合
        /// </summary>
        /// <returns></returns>
        public PropertyDescriptorCollection GetProperties()
        {
            /*var visibleProperties = _properties.Where(p => p.IsBrowsable);
            return new PropertyDescriptorCollection(visibleProperties.ToArray());*/

            //return new PropertyDescriptorCollection(_properties.ToArray(), true);

            var arr = _properties.Where(x => x.IsBrowsable).ToArray();
            return new PropertyDescriptorCollection(arr, true);
        }

        public PropertyDescriptorCollection GetProperties(Attribute[] attributes)
        {
            return GetProperties();
            //return new PropertyDescriptorCollection(_properties.ToArray());
        }

        // ICustomTypeDescriptor 其他接口方法可以选择实现空逻辑
        public AttributeCollection GetAttributes() => AttributeCollection.Empty;
        public string GetClassName() => null;
        public string GetComponentName() => null;
        public TypeConverter GetConverter() => null;
        public EventDescriptor GetDefaultEvent() => null;
        public PropertyDescriptor GetDefaultProperty() => null;
        public object GetEditor(Type editorBaseType) => null;
        public EventDescriptorCollection GetEvents() => EventDescriptorCollection.Empty;
        public EventDescriptorCollection GetEvents(Attribute[] attributes) => EventDescriptorCollection.Empty;

        public List<DynamicProperty> GetDynamicProperties() => _properties;

        public DynamicProperty GetDynamicProperty(string name)
        {
            if (string.IsNullOrEmpty(name))
            {
                return null;
            }

            DynamicProperty data = null;
            foreach (DynamicProperty tmp in _properties)
            {
                if (!tmp.Name.Equals(name))
                {
                    continue;
                }

                data = tmp;
                break;
            }

            return data;
        }

        public void SetPropertyReadonly(string name, bool isReadOnly)
        {
            foreach (var tmp in _properties)
            {
                if (!tmp.Name.Equals(name))
                {
                    continue;
                }

                tmp.CustomIsRreadOnly = isReadOnly;
                break;
            }
        }

        public void SetPropertyBrowse(string name, bool browse)
        {
            foreach (var tmp in _properties)
            {
                if (!tmp.Name.Equals(name))
                {
                    continue;
                }

                tmp.SetBrowse(browse);
                break;
            }
        }

        public void SetCustomConverter(string name, TypeConverter typeConverter)
        {
            foreach (var tmp in _properties)
            {
                if (!tmp.Name.Equals(name))
                {
                    continue;
                }

                tmp.CustomTypeConverter = typeConverter;
                break;
            }
        }

        public bool RemovePropertyByName(string name)
        {
            if (string.IsNullOrEmpty(name))
            {
                return true;
            }

            DynamicProperty data = null;

            foreach (DynamicProperty tmp in _properties)
            {
                if (!tmp.Name.Equals(name))
                {
                    continue;
                }

                data = tmp;
                break;
            }

            _properties.Remove(data);

            return true;
        }
    }

2. 动态属性

// 动态属性类
    public class DynamicProperty : PropertyDescriptor
    {
        private object _value;
        private Type _converterType;
        private string _displayName;
        private string _category;
        private bool _brows;
        private string _desc;
        private bool _readOnly;
        private TypeConverter _typeConverter;

        public bool CustomIsRreadOnly { set; get; }

        public TypeConverter CustomTypeConverter { get => _typeConverter; set { _typeConverter = value; } }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="value"></param>
        /// <param name="displayName">显示名称</param>
        /// <param name="description">描述</param>
        /// <param name="cateogry">分类</param>
        /// <param name="readlyOnly">只读</param>
        /// <param name="converterType">转换器</param>
        /// <param name="brows">显示</param>
        public DynamicProperty(string name, object value, string displayName = null, string description = null, string cateogry = "属性", bool readlyOnly = false, Type converterType = null, bool brows = true, TypeConverter typeConverter = null) : base(name, new Attribute[0])
        {
            _value = value;
            _converterType = converterType;
            _displayName = displayName;
            if (string.IsNullOrEmpty(displayName))
            {
                _displayName = name;
            }
            _category = cateogry;
            _brows = brows;
            _desc = description;
            _readOnly = readlyOnly;
            CustomIsRreadOnly = readlyOnly;
            _typeConverter = typeConverter;
        }

        public override bool CanResetValue(object component) => false;
        public override Type ComponentType => typeof(DynamicObject);
        public override object GetValue(object component) => _value;
        public override bool IsReadOnly => CustomIsRreadOnly;
        public override Type PropertyType => _value.GetType();
        public override void ResetValue(object component) { }
        public override void SetValue(object component, object value) => _value = value;
        public override bool ShouldSerializeValue(object component) => true;

        public override TypeConverter Converter
        {
            get
            {
                /*if (_value is bool)
                {
                    return new BooleanCheckBoxConverter();
                }*/
                if (_converterType != null)
                {
                    return (TypeConverter)Activator.CreateInstance(_converterType);
                }
                if (_typeConverter != null)
                {
                    return _typeConverter;
                }
                return base.Converter;
            }
        }

        public override string DisplayName => _displayName;

        public override string Category => _category;

        public override bool IsBrowsable => _brows;

        public override string Description => _desc;


        public override AttributeCollection Attributes
        {
            get
            {
                var attributes = base.Attributes.Cast<Attribute>().ToList();
                if (CustomIsRreadOnly)
                {
                    attributes.Add(new ReadOnlyAttribute(true));
                }

                return new AttributeCollection(attributes.ToArray());
            }
        }

        public void SetCategory(string newCategory)
        {
            _category = newCategory;
        }

        public void SetBrowse(bool val)
        {
            _brows = val;
        }
    }

3. 用法

DynamicObject gradeObj = new DynamicObject()
{
	CustomName = "YourName",
	TagInfo = tagInfo
};
gradeObj.AddProperty("Category", "三年级", "年级", "班级描述", "基本属性", true, null, true);
gradeObj.AddProperty("Type", "", "二班", "班级", "基本属性", true, null, true);
PropertyGrid.SelectedObject = gradeObj;

// 读取
DynamicObject customroperty = (DynamicObject)PropertyGrid.SelectedObject;
string catStr = customroperty.GetDynamicProperty("Category").GetValue("Category").ToString();