//define ConnectionString property.CustomProperty<string> ConnectionStringProperty = new CustomProperty<string>("ConnectionStringProperty");//create customDataCustomData data = new CustomData();data.SetValue<string>(ConnectionStringProperty, "test");string v = data.GetValue<string>(ConnectionStringProperty);详细的代码如下：
CustomProperty//==========================================// File: CustomProperty.cs// Date: 2008-03-10// Author: tansm//------------------------------//// Description:// 提供自定义的选项属性键//// History: 2008-03-10 Created////===========================================using System;namespace Dcms.Common.Advanced 
{
/**//// <summary> /// 自定义选项属性的描述对象。被应用在ApplicationControlService的自定义属性描述 /// </summary>
/// <typeparam name="T">此属性的类型，必须是值类型 </typeparam> [ Serializable, System.Diagnostics.DebuggerDisplay(@"{PropertyName}:{PropertyType}") ] public sealed class CustomProperty<T> { /**//// <summary> /// 创建 CustomProperty 实例 /// </summary> /// <param name="propertyName">属性的名称,不能为空</param> public CustomProperty(string propertyName) { 参数检查#region 参数检查 if (string.IsNullOrEmpty(propertyName)) { throw new ArgumentNullException("propertyName"); } #endregion _propertyName = propertyName; _defaultValue = default(T); _isReadonly = false; } /**//// <summary> /// 创建 CustomProperty 实例 /// </summary> /// <param name="propertyName">属性的名称,不能为空</param> /// <param name="defaultValue">属性的缺省值</param> /// <param name="isReadonly">此属性是否是只读</param> public CustomProperty(string propertyName, T defaultValue, bool isReadonly) { 参数检查#region 参数检查 if (string.IsNullOrEmpty(propertyName)) { throw new ArgumentNullException("propertyName"); } #endregion _propertyName = propertyName; _defaultValue = defaultValue; _isReadonly = isReadonly; } private string _propertyName; /**//// <summary> /// 返回自定义属性的名称 /// </summary> public string PropertyName { get { return _propertyName; } } /**//// <summary> /// 返回属性的类型 /// </summary> public Type PropertyType { get { return typeof(T); } } private T _defaultValue; /**//// <summary> /// 返回此属性的默认值 /// </summary> public T DefaultValue { get { return _defaultValue; } } private bool _isReadonly; /**//// <summary> /// 返回属性是否是只读属性 /// </summary> public bool IsReadonly { get { return _isReadonly; } } /**//// <summary> /// 返回此对象的Hash值 /// </summary> /// <returns>实例的Hash值</returns> public override int GetHashCode() { return System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(this); } /**//// <summary> /// 判断两个对象是否相等 /// </summary> /// <param name="obj">要判断的实例</param> /// <returns>相等返回true</returns> public override bool Equals(object obj) { return object.ReferenceEquals(obj, this); } /**//// <summary> /// 返回此实例的字符串表示 /// </summary> /// <returns>实例的字符串表示</returns> public override string ToString() { return string.Format("{0}:{1}", _propertyName, typeof(T)); } }
}CustomData//==========================================// File: CustomData.cs// Date: 2008-03-10// Author: tansm//------------------------------//// Description:// 自定义属性包装类//// History: 2008-03-10 Created////===========================================using System;using System.Collections.Generic;using System.Diagnostics;namespace Dcms.Common.Advanced { /**//// <summary> /// 包含自定义属性的类，此类被应用在ApplicationControlService /// </summary> [ Serializable, System.Diagnostics.DebuggerDisplay(@"Count = {Count}"), DebuggerTypeProxy(typeof(CustomDataDebugView)), ] public class CustomData { private Dictionary<object, object> _values; //property为键 /**//// <summary> /// 创建 CustomData 实例 /// </summary> public CustomData() { _values = new Dictionary<object, object>(); } /**//// <summary> /// 返回指定自定义属性的值，如果没有包含值，将返回默认值 /// </summary> /// <typeparam name="T">属性的值类型</typeparam> /// <param name="property">属性键</param> /// <returns>此属性的值，如果没有找到将返回默认值</returns> public T GetValue<T>(CustomProperty<T> property) { 参数检查#region 参数检查 if (property == null) { throw new ArgumentNullException("property"); } #endregion object result; if (_values.TryGetValue(property, out result)) { return (T)result; } return property.DefaultValue; } /**//// <summary> /// 设置某个属性的值，如果是只读属性只能设置一次。 /// </summary> /// <typeparam name="T">属性的值类型</typeparam> /// <param name="property">属性键</param> /// <param name="value">属性的新值</param> public void SetValue<T>(CustomProperty<T> property, T value) { 参数检查#region 参数检查 if (property == null) { throw new ArgumentNullException("property"); } #endregion if (_values.ContainsKey(property)) { if (property.IsReadonly) { throw new ApplicationException(string.Format("自定义属性{0}是只读属性，只能设置一次。", property)); } _values[property] = value; } else { _values.Add(property, value); } } /**//// <summary> /// 返回所有的属性列表 /// </summary> /// <returns>属性列表 </returns> public object[] GetProperties() { object[] keys = new object[_values.Count]; _values.Keys.CopyTo(keys, 0); return keys; } /**//// <summary> /// 返回属性的总数 /// </summary> public int Count { get { return _values.Count; } } /**//// <summary> /// 将数据复制到数组中 /// </summary> /// <param name="array">新的数组</param> /// <param name="arrayIndex">开始索引</param> internal void CopyTo(KeyValuePair<object, object>[] array, int arrayIndex) { ((ICollection<KeyValuePair<object, object>>)_values).CopyTo(array, arrayIndex); } } internal sealed class CustomDataDebugView { private CustomData _customData; public CustomDataDebugView(CustomData customData) { 参数检查#region 参数检查 if (customData == null) { throw new ArgumentNullException("customData"); } #endregion this._customData = customData; } [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)] public KeyValuePair<object, object>[] Items { get { KeyValuePair<object, object>[] values = new KeyValuePair<object, object>[_customData.Count]; _customData.CopyTo(values, 0); return values; } } }}