程式碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace GB2312ConvertChinese
{
    class Program
    {
        static void Main(string[] args)
        {
            string content = "/HTC Butterfly X920e是剛剛推出不久的一款智慧手機，該機的5.0英寸大屏&";
            Console.WriteLine(GBKToChinese(content));
            Console.ReadKey();
        }
        static string GBKToChinese(string content)
        {
            string pattern = "&#(.+?);";          
            if (!Regex.IsMatch(content, pattern))
                return content;
            MatchCollection collection = Regex.Matches(content, pattern);
            foreach (Match item in collection)
            {
                string GBK_Code = item.Value;
                string GBK_Value = item.Groups[1].Value;
                string chinese = ((char)Convert.ToInt32(GBK_Value, 10)).ToString();
                content = content.Replace(GBK_Code, chinese);
            }
            return content;
        }
    }
}
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        //獲得GB2312編碼。
        static void Main(string[] args)
        {
            string str = "研究中心";
            StringBuilder sb = new StringBuilder();
            foreach (char c in str)
                sb.AppendFormat("&#{0};", Convert.ToString((int)c, 10));
            Console.WriteLine(sb.ToString());
            Console.ReadKey();
        }
    }
}
 

參考：請問關於\u開頭的漢字編碼是什麼型別的編碼，c#怎樣轉換

unicode字元
如果是這樣的string str = "\u5317\u4eac";
那直接輸出就可以了
如果這個字串是從其它地方得到的話，就這樣：

C# code

string str ="\\u5317\\u4eac"; string[] temp = str.Split(newstring[] { "\\u" }, StringSplitOptions.RemoveEmptyEntries); for (int i =0; i < temp.Length; i++

) temp[i] = ((char)Convert.ToInt32(temp[i], 16)).ToString(); string result =string.Join("", temp); Console.WriteLine(result);

要從漢字轉成unicode編碼：

C# code

string str ="北京"; StringBuilder sb =new StringBuilder(); foreach (char c in str) sb.AppendFormat("\\u{0}", Convert.ToString((int)c, 16)); Response.Write(sb.ToString());