C#大写金额转数字代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Xml;

namespace Citic_DataProvider
{
    /// <summary>
    /// 判断是否Ping通
    /// </summary>
    public abstract class Utils
    {
        /// <summary>
        /// 将大写金额转成数字
        /// </summary>
        /// <param name="strMoney"></param>
        /// <returns></returns>
        public static double ConvertBigMoneyToDouble(string strMoney)
        {
            double ret = 0;
            if (string.IsNullOrEmpty(strMoney)) return ret;
            strMoney = strMoney.Replace(" ", "");
            strMoney = FilterString(strMoney);
            string strWei = "亿萬仟佰拾圆角分";

            int i;
            for (i = 0; i < strWei.Length; i++)
            {