VTemplate.Engine/VariableCollection.cs

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/* ***********************************************
 * Author		:  kingthy
 * Email		:  kingthy@gmail.com
 * Description	:  VariableCollection
 *
 * ***********************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using System.Collections.Specialized;

namespace VTemplate.Engine
{
    /// <summary>
    /// 变量集合
    /// </summary>
    public class VariableCollection
        : IEnumerable<Variable>
    {
        /// <summary>
        /// 构造默认集合
        /// </summary>
        internal VariableCollection()
        {
            _Dictionary = new Dictionary<string, Variable>(StringComparer.InvariantCultureIgnoreCase);
        }

        /// <summary>
        /// 构造一定容量的集合
        /// </summary>
        /// <param name="capacity"></param>
        public VariableCollection(int capacity)
        {
            _Dictionary = new Dictionary<string, Variable>(capacity, StringComparer.InvariantCultureIgnoreCase);
        }

        /// <summary>
        /// 存放容器
        /// </summary>
        private Dictionary<string, Variable> _Dictionary;

        /// <summary>
        /// 返回某个索引位置的变量
        /// </summary>
        /// <param name="index">索引值</param>
        /// <returns>如果存在此索引位置值,则返回其变量值否则返回null</returns>
        public Variable this[int index]
        {
            get
            {
                if (index >= 0 && index < _Dictionary.Count)
                {
                    IEnumerator<Variable> enumer = _Dictionary.Values.GetEnumerator();
                    int i = 0;
                    while (enumer.MoveNext())
                    {
                        if (i == index)
                        {
                            return enumer.Current;