C#动态对象 dynamic

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Dynamic;
using System.Reflection;

namespace DHUI.Base.Util
{
    /// <summary>
    /// 扩展动态对象
    /// </summary>
    public class DynamicObjectEx
        : DynamicObject
    {
        #region 成员

        private Dictionary<string, object> _dc;

        #endregion

        #region 构造

        /// <summary>
        /// 构造动态对象
        /// </summary>
        public DynamicObjectEx()
        {
            _dc = new Dictionary<string, object>();
        }
        /// <summary>
        /// 构造动态对象
        /// </summary>
        /// <param name="kv">字典</param>
        public DynamicObjectEx(Dictionary<string, object> kv)
        {
            _dc = kv;
        }

        #endregion

        #region 属性

        /// <summary>
        /// 键值对
        /// </summary>
        public Dictionary<string, object> KeyValues
        {
            get
            {
                return _dc;
            }
        }

        #endregion

        #region 方法

        /// <summary>
        /// 移除属性或索引
        /// </summary>
        /// <param name="nameOrIndexes">属性名或索引列表</param>
        /// <returns></returns>
        public void Remove(params object[] nameOrIndexes)
        {
            if (nameOrIndexes.Length > 0)
            {
                string propertyName = string.Join(",", nameOrIndexes);

                //非静态属性
                if (null == this.GetType().GetProperty(propertyName))
                {
                    //动态属性
                    lock (this)
                    {
                        if (_dc.ContainsKey(propertyName))
                        {
                            _dc.Remove(propertyName);
                        }
                    }
                }
            }
        }
        /// <summary>
        /// 清除动态属性
        /// </summary>
        public void Clear()
        {
            lock (this)
            {
                _dc.Clear();
            }
        }
        /// <summary>
        /// 是否存在属性或索引
        /// </summary>
        /// <param name="nameOrIndexes">属性名或索引列表</param>
        /// <returns></returns>
        public bool Exists(params object[] nameOrIndexes)
        {
            if (nameOrIndexes.Length > 0)
            {
                string propertyName = string.Join(",", nameOrIndexes);

                //静态属性
                if (null != this.GetType().GetProperty(propertyName))
                {
                    return true;
                }
                //动态属性
                lock (this)
                {
                    return _dc.ContainsKey(propertyName);
                }
            }

            return false;
        }
        /// <summary>
        /// 取属性或索引值
        /// </summary>
        /// <param name="defaultValue">默认值</param>
        /// <param name="nameOrIndexes">属性名或索引列表</param>
        /// <returns></returns>
        public object GetValue(object defaultValue, params object[] nameOrIndexes)
        {
            if (nameOrIndexes.Length > 0)
            {
                string propertyName = string.Join(",", nameOrIndexes);

                //静态属性
                PropertyInfo pi = this.GetType().GetProperty(propertyName);
                if (null != pi)
                {
                    return pi.GetValue(this, null);
                }
                //动态属性
                lock (this)
                {
                    if (_dc.ContainsKey(propertyName))
                        return _dc[propertyName];
                    else
                    {
                        _dc.Add(propertyName, defaultValue);
                    }
                }
            }

            return defaultValue;
        }
        /// <summary>
        /// 设置域值
        /// </summary>
        /// <param name="value">设置值</param>
        /// <param name="nameOrIndexes">属性名或索引列表</param>
        public void SetValue(object value, params object[] nameOrIndexes)
        {
            if (nameOrIndexes.Length > 0)
            {
                string propertyName = string.Join(",", nameOrIndexes);

                PropertyInfo pi = this.GetType().GetProperty(propertyName);
                if (null == pi)
                {
                    //动态属性
                    lock (this)
                    {
                        if (_dc.ContainsKey(propertyName))
                            _dc[propertyName] = value;
                        else
                        {
                            _dc.Add(propertyName, value);
                        }
                    }
                }
                else
                {
                    //静态属性
                    pi.SetValue(this, value, null);
                }
            }
        }
        /// <summary>
        /// 取动态索引值对
        /// </summary>
        /// <param name="indexes">索引列表</param>
        /// <returns></returns>
        public Dictionary<object[], object> GetIndex2Value(params object[] indexes)
        {
            Dictionary<object[], object> i2v = new Dictionary<object[], object>();
            if (indexes.Length > 0)
            {
                string propertyName = string.Join(",", indexes);
                lock (this)
                {
                    var keys = _dc.Keys.Where(k => Regex.IsMatch(k, string.Format("^{0}(,[^,]+)*$", Regex.Escape(propertyName)))).OrderBy(k => k).Select(k => new IndexComparer(k, indexes.Length));
                    foreach (IndexComparer k in keys)
                    {
                        i2v.Add(k.Key.Split(','), _dc[k.Key]);
                    }
                }
            }

            return i2v;
        }
        /// <summary>
        /// 取顶层动态索引值对
        /// </summary>
        /// <returns></returns>
        public Dictionary<string, object> GetRootIndex2Value()
        {
            Dictionary<string, object> i2v = new Dictionary<string, object>();
            lock (this)
            {
                foreach (string k in _dc.Keys)
                    if (k.IndexOf(',') < 0)
                        i2v.Add(k, _dc[k]);
            }

            return i2v;
        }
        /// <summary>
        /// 取索引属性
        /// </summary>
        /// <param name="binder">绑定器</param>
        /// <param name="indexes">索引列表</param>
        /// <param name="result">获取值</param>
        /// <returns></returns>
        public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
        {
            result = null;

            string propertyName = string.Join(",", indexes);
            lock (this)
            {
                if (_dc.ContainsKey(propertyName))
                    result = _dc[propertyName];
            }

            return true;
        }
        /// <summary>
        /// 设置索引属性
        /// </summary>
        /// <param name="binder">绑定器</param>
        /// <param name="indexes">索引列表</param>
        /// <param name="value">设定值</param>
        /// <returns></returns>
        public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
        {
            string propertyName = string.Join(",", indexes);
            lock (this)
            {
                if (_dc.ContainsKey(propertyName))
                    _dc.Remove(propertyName);

                _dc.Add(propertyName, value);
            }
            return true;
        }
        /// <summary>
        /// 取动态属性
        /// </summary>
        /// <param name="binder">绑定器</param>
        /// <param name="result">结果值</param>
        /// <returns></returns>
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            result = null;

            lock (this)
            {
                if (_dc.ContainsKey(binder.Name))
                    result = _dc[binder.Name];
            }

            return true;
        }
        /// <summary>
        /// 设置动态属性
        /// </summary>
        /// <param name="binder">绑定器</param>
        /// <param name="value">设置值</param>
        /// <returns></returns>
        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            lock (this)
            {
                if (_dc.ContainsKey(binder.Name))
                    _dc.Remove(binder.Name);

                _dc.Add(binder.Name, value);
            }
            return true;
        }

        #endregion

        /// <summary>
        /// 索引比较器
        /// </summary>
        private class IndexComparer
            : IComparable
        {

            #region 构造

            public IndexComparer(string key, int startPos)
            {
                _key = key;
                _startPos = startPos;
            }

            #endregion

            #region 成员

            private int _startPos;
            private string _key;

            #endregion

            #region 属性

            /// <summary>
            /// 键值
            /// </summary>
            public string Key
            {
                get
                {
                    return _key;
                }
            }

            #endregion

            #region IComparable 成员

            public int CompareTo(object obj)
            {
                try
                {
                    string[] a = _key.Split(',');
                    string[] b = (obj as IndexComparer)._key.Split(',');
                    int m = a.Length;
                    if (m > b.Length) m = b.Length;
                    int c;
                    for (int i = _startPos; i < m; i++)
                    {
                        decimal a1, b1;
                        if (decimal.TryParse(a[i], out a1) && decimal.TryParse(b[i], out b1))
                        {
                            if (a1 < b1)
                                return -1;
                            else if (a1 > b1)
                                return 1;
                        }
                        else
                        {
                            c = string.Compare(a[i], b[i]);
                            if (0 != c)
                                return c;
                        }
                    }
                    if (a.Length < b.Length)
                        return -1;
                    else
                        return 1;
                }
                catch
                {

                }

                return -1;
            }

            #endregion
        }
    }
}

dynamic 的相关文章

C#动态对象(dynamic)示例(实现方法和属性的动态)

C#4.0的动态性大大增强——dynamic