编码格式的转换

（整理：网站建设与网站制作公司-VeiSun.Com）c#实现GB2312和UTF8字符编码方式的转换

public string UTF8ToGB2312(string str)
{
try
{
Encoding utf8 = Encoding.GetEncoding(65001);
Encoding gb2312 = Encoding.GetEncoding("gb2312");//Encoding.Default ,936
byte[] temp = utf8.GetBytes(str);
byte[] temp1 = Encoding.Convert(utf8, gb2312, temp);
string result = gb2312.GetString(temp1);
return result;
}
catch (Exception ex)//(UnsupportedEncodingException ex)
{
MessageBox.Show(ex.ToString());
return null;
}
}
public string GB2312ToUTF8(string str)
{
try
{
Encoding uft8 = Encoding.GetEncoding(65001);
Encoding gb2312 = Encoding.GetEncoding("gb2312");
byte[] temp = gb2312.GetBytes(str);
MessageBox.Show("gb2312的编码的字节个数：" + temp.Length);
for (int i = 0; i < temp.Length; i++)
{
MessageBox.Show(Convert.ToUInt16(temp[i]).ToString());
}
byte[] temp1 = Encoding.Convert(gb2312, uft8, temp);
MessageBox.Show("uft8的编码的字节个数：" + temp1.Length);
for (int i = 0; i < temp1.Length; i++)
{
MessageBox.Show(Convert.ToUInt16(temp1[i]).ToString());
}
string result = uft8.GetString(temp1);
return result;
}
catch (Exception ex)//(UnsupportedEncodingException ex)
{
MessageBox.Show(ex.ToString());
return null;
}
}

代码说明：

Encoding utf8 = Encoding.GetEncoding(65001);//使用code page

Encoding gb2312 = Encoding.GetEncoding("gb2312");//通过bodyname

获取字符编码字节序列：byte[] temp=utf8.GetBytes(str);

编码方式转换：byte[] temp1=Encoding.Convert(utf8, gb2312, temp);

获取编码的字符串：string str1=gb2312.GetString(temp1);

这样即完成了字符编码的转换。

Encoding.Default在 简体中文os中一般是gb2312格式。