.Net分享两个隐藏字符串的方法

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JS的方法

/*隐藏部分字符*@str 原字符串*@startIndex 开始索引*@length 隐藏长度*@replaceChar 替换字符*/function hiddenChar(str, startIndex, length, replaceChar) {    var str_start = "";    var str_end = "";    var str_middle = "";    var str_length = str.length;    var replace_length = length;    if (startIndex > 0)        str_start = str.substr(0, startIndex);    if (startIndex + replace_length < str_length)        str_end = str.substring(startIndex + replace_length);    if (startIndex + replace_length > str_length)        replace_length = str_length - startIndex;    for (var i = 0; i < replace_length; i++) {        str_middle += replaceChar;    }    str = str_start + str_middle + str_end;    return str;}

C#的方法

/// <summary>        /// 隐藏部分字符串        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="startIndex">开始隐藏位置</param>        /// <param name="length">隐藏长度</param>        /// <param name="replaceChar">替换符</param>        /// <returns></returns>        public static string HiddenPortion(string source, int startIndex, int length, string replaceChar)        {            string result = null;            string str_start = null;            string str_end = null;            string str_middle = null;            int str_length = source.Length;            int replace_length = length;            if (startIndex >= str_length)                startIndex = str_length;            if (startIndex > 0)                str_start = source.Substring(0, startIndex);            if (startIndex + replace_length < str_length)                str_end = source.Substring(startIndex + replace_length, str_length - startIndex - replace_length);            if (startIndex + replace_length > str_length)                replace_length = str_length - startIndex;            for (var i = 0; i < replace_length; i++)            {                str_middle += replaceChar;            }            result = str_start + str_middle + str_end;            return result;        }

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