编码转换

 

C# GB2312 转 UTF-8

http://www.itzhe.cn/article/20080130/69110.html

http://blog.chinaunix.net/u1/46538/showart_396923.html

 public void EncryptFile(string strInFileName, string strOutFileName)
            {
                try
                {
                    byte[] data = File.ReadAllBytes(strInFileName);
                    StreamWriter sw = new StreamWriter(strOutFileName, false, Encoding.Unicode);
                    char[] buffer2 = Encoding.Unicode.GetChars(data);
                    sw.Write(buffer2);
                    sw.Flush();
                    sw.Close();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
            public void DecryptFile(string strInFileName, string strOutFileNameV)
            {
                StreamReader sr = new StreamReader(strInFileName, System.Text.Encoding.Unicode);
                StreamWriter sw = new StreamWriter(strOutFileNameV, false, System.Text.Encoding.GetEncoding("Shift-JIS"));
                try
                {
                    char[] buffer;
                    while (!sr.EndOfStream)
                    {
                        buffer = System.Text.Encoding.GetEncoding("Shift-JIS").GetChars(System.Text.Encoding.Unicode.GetBytes(sr.ReadLine()));
                        sw.WriteLine(buffer);
                    }
                    sw.Flush();
                    sw.Close();
                    sr.Close();
                }
                catch (Exception ex)
                {
                    throw ex;
                }

            }

bool writeunicodecsv()
        {
            StreamReader sr = new StreamReader(@"D:\q.csv", System.Text.Encoding.GetEncoding("Shift-JIS"));
            StreamWriter sw = new StreamWriter(@"D:\qUnicode.csv", false, Encoding.Unicode);
            try
            {
                string strline;
                string  strWrite;
                int i = 0;
                while (!sr.EndOfStream)
                {
                    i++;
                    strline = sr.ReadLine();
                    strWrite = System.Text.Encoding.Unicode.GetString(System.Text.Encoding.GetEncoding("Shift-JIS").GetBytes (strline));
                    sw.WriteLine(strWrite);

                }
                sr.Close();
                sw.Flush();
                sw.Close();
                MessageBox.Show(i.ToString());
            }
            catch (Exception ex)
            {
                throw ex;
                MessageBox.Show(ex.Message);
            }
            return true;

        }

        bool readcsv()
        {
            string strReadCsvFile = @"D:\qUnicode.csv";
            string strWriteCsvFile = @"D:\qshiftjis.csv";
            StreamReader sr = new StreamReader(strReadCsvFile, System.Text.Encoding.Unicode);
            StreamWriter sw = new StreamWriter(strWriteCsvFile, false, System.Text.Encoding.GetEncoding("Shift-JIS"));
            try
            {
                string strline;
                string strWrite;
                int i = 0;
                while (!sr.EndOfStream)
                {
                    i++;
                    strline = sr.ReadLine();          
                    strWrite = System.Text.Encoding.GetEncoding("Shift-JIS").GetString(System.Text.Encoding.Unicode.GetBytes(strline));
                    sw.WriteLine(strWrite);
                }
                sr.Close();
                sw.Flush();
                sw.Close();
            }
            catch (Exception ex)
            {
                throw ex;
                MessageBox.Show(ex.Message);
            }
            return true;
        }