C#中QuotedPrintable编解码

using System.Collections;

using System.Globalization;

 

public string QuotedPrintableEncode(string AText)// QP编码

{

    string Result = "";

    byte[] vBuffer = Encoding.Default.GetBytes(AText);

    foreach(byte vByte in vBuffer)

        // 可见字符并非"="(#61)

        if ((vByte >= 33 && vByte <= 60) || (vByte >= 62 && vByte <= 126)) 

            Result += (char)vByte;

        else Result += "=" + vByte.ToString("X2");

    return Result;

}

 

public static string QuotedPrintableDecode(string ACode)// 解码

{

    ArrayList vBuffer = new ArrayList();

   

    for(int i = 0; i < ACode.Length; i++)

    {

        if (ACode[i] == '=')

        {

            i++;

            if (ACode[i] != '/r')

            {

                byte vByte;

                if (byte.TryParse(ACode.Substring(i, 2), 

                    NumberStyles.HexNumber, null, out vByte))

                    vBuffer.Add(vByte);

            }

            i++;

        }

        else if (ACode[i] != '/n') vBuffer.Add((byte)ACode[i]);

    }

    return Encoding.Default.GetString((byte[])vBuffer.ToArray(typeof(byte)));

}

 

private void button1_Click(object sender, EventArgs e)

{

    Text = QuotedPrintableDecode(QuotedPrintableEncode("zswang 路过"));

}