c# 寫url:encode和decode

        //
        public static string UrlEncode(string str)
        {
            StringBuilder sb = new StringBuilder();
            byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str);             
            for (int i = 0; i < byStr.Length; i++)
            {
                    sb.Append(@"%" + Convert.ToString(byStr[i], 16));
             }
             return (sb.ToString());
        }
        public static string UrlEncode2(string str)
        {
            StringBuilder sb = new StringBuilder();
            byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str);            
            for (int i = 0; i < byStr.Length; i++)
            {
                   sb.Append(Convert.ToString(byStr[i], 16));
            }
            return (sb.ToString());
        }
        public static string UrlDecode(string str)
        {
            char[] cr = str.ToCharArray();

            byte[] byStr = new byte[cr.Length/2];

            int j = 0;
            for (int i = 0; i < byStr.Length; i++)
            {
                byStr[i] = byte.Parse(cr[j]+""+cr[j+1], System.Globalization.NumberStyles.HexNumber);
                j=j+2;
            }
            str = System.Text.Encoding.UTF8.GetString(byStr);
            
            return (str);
        }

public static string UrlDecode(string str)
其實是沒有%情況的Url解碼

 

有%分隔情況下

char[] cr = str.ToCharArray();
就不用這么麻煩了

可以直接寫  string[] cr = str.split('%');

更簡單....

 

更多關於c#轉換問題，可以看這里：http://hi.baidu.com/xdwu/blog/item/5bc9e9437823871673f05dae.html