二进制样式的字符串与byte数组互转函数示例

开发时用到的方法，记录下：

    /// <summary>
    /// 测试方法 
    /// </summary>
    private void TestFun()
    {
        Response.Write("=================<p>");

        var b = BinaryStr2ByteArray("10011010010");
        var str = ByteArray2BinaryStr(b);
        str = str.TrimStart('0');
        Response.Write(str);

        
        Response.Write("<p>=================");
        Response.End();
    }

    /// <summary>
    /// 二进制样式的字符串转byte数组
    /// </summary>
    /// <param name="binaryStr">二进制样式的字符串</param>
    /// <returns></returns>
    private byte[] BinaryStr2ByteArray(string binaryStr)
    {
        if (string.IsNullOrEmpty(binaryStr)) binaryStr = string.Empty;

        List<byte> byte_List = new List<byte>();
        var strL = binaryStr.Length;
        if (strL == 0)
            byte_List.Add(0);
        else if (strL > 0 && strL <= 4)
            byte_List.Add(Convert.ToByte(binaryStr, 2));
        else
        {
            var tempStr = string.Empty;
            for (var i = strL; i > 0; i = i - 4)
            {
                if (i - 4 > 0)
                    tempStr = binaryStr.Substring(i - 4, 4);
                else
                    tempStr = binaryStr.Substring(0, i);
                byte_List.Add(Convert.ToByte(tempStr, 2));
            }
        }

        byte_List.Reverse();
        return byte_List.ToArray();
    }


    /// <summary>
    /// byte数组转二进制样式的字符串
    /// </summary>
    /// <param name="byteArr">byte数组</param>
    /// <returns></returns>
    private string ByteArray2BinaryStr(byte[] byteArr)
    {
        List<string> strList = new List<string>();
        var bl = byteArr.Length;
        if (bl == 0)
            return "";
        else
        {
            var tempStr = string.Empty;
            for (var i = 0; i < bl; i++)
            {
                tempStr = Convert.ToString(byteArr[i], 2);
                if (tempStr.Length < 4)
                    tempStr = tempStr.PadLeft(4, '0');
                strList.Add(tempStr);
            }
        }

        return string.Join("", strList.ToArray());
    }


}
}