注释过的vcf文件怎么分析（C生成vcf文件源代码）

需要需要生成vcf 联系人通讯录，想到最快的是C# 做桌面应用程序，搜索了一下发现 contacts.vcf 文件其实就是文本，可以用记事本打开，格式如下

BEGIN:VCARD VERSION:2.1 N;CHARSET=UTF-8;Encoding=QUOTED-PRINTABLE:Ben TEL;CELL:123546 END:VCARD

如果是多个就一直这样排列下去；

public static void CreateCard(string name,string phoneNumber,bool isUtf8Encode) { String fileName = string.Format(@"D:/{0}_{1}.vcf", name, isUtf8Encode ? "Android":"windows"); FileStream fs = new FileStream(fileName, FileMode.Create); StreamWriter sw = new StreamWriter(fs); sw.WriteLine("BEGIN:VCARD"); sw.WriteLine("VERSION:2.1"); sw.WriteLine("N;charSET=UTF-8;ENCODING=QUOTED-PRINTABLE:" EncodeQuotedPrintable(name, isUtf8Encode)); sw.WriteLine("TEL;CELL:" phoneNumber); sw.WriteLine("END:VCARD"); sw.Flush(); sw.Close(); fs.Close(); ; }

Quoted-Printable编码定义，其实很简单，就是将要编码的文字转换成byte字节流，然后使用十六进制的char型和“=”联合表达出来，如=0C表示12。下面提供编码及解码的方式：

public static string EncodeQuotedPrintable(string value,bool isUtf8Encode) { if (string.IsNullOrEmpty(value)) return value; StringBuilder builder = new StringBuilder(); byte[] bytes = isUtf8Encode? Encoding.UTF8.GetBytes(value): Encoding.Default.GetBytes(value); foreach (byte v in bytes) { // The following are not required to be encoded: // - Tab (ascii 9) // - Space (ASCII 32) // - Characters 33 to 126, except for the equal sign (61). if ((v == 9) || ((v >= 32) && (v <= 60)) || ((v >= 62) && (v <= 126))) { builder.Append(Convert.ToChar(v)); } else { builder.Append('='); builder.Append(v.ToString("X2")); } } char lastChar = builder[builder.Length - 1]; if (char.IsWhiteSpace(lastChar)) { builder.Remove(builder.Length - 1, 1); builder.Append('='); builder.Append(((int)lastChar).ToString("X2")); } return builder.ToString(); } public static string DecodeQuotedPrintable(string input, string charSet) { Encoding enc; try { enc = Encoding.GetEncoding(charSet); } catch { enc = new UTF8Encoding(); } var occurences = new Regex(@"(=[0-9A-Z]{2}){1,}", RegexOptions.Multiline); var matches = occurences.Matches(input); foreach (Match match in matches) { try { byte[] b = new byte[match.Groups[0].Value.Length / 3]; for (int i = 0; i < match.Groups[0].Value.Length / 3; i ) { b[i] = byte.Parse(match.Groups[0].Value.Substring(i * 3 1, 2), System.Globalization.NumberStyles.AllowHexSpecifier); } char[] hexChar = enc.GetChars(b); input = input.Replace(match.Groups[0].Value, new String(hexChar)); } catch {; } } input = input.Replace("?=", "").Replace("\r\n", ""); return input; }

由于outlook 和Android 的解码方式不同，所以在编码的时候也需要注意，Android使用的是Utf-8, 而outlook 使用的是ascii,所以这里需要注意； utf8占用3个字节，ascii 占用两个字节；

下面是通过UTF-8生成出来 的

BEGIN:VCARD VERSION:2.1 N;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:=E5=B0=8F=E6=9B=BE TEL;CELL:13912341234 END:VCARD

下面是通过default (ASCII)生成出来 的

BEGIN:VCARD VERSION:2.1 N;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:=D0=A1=D4=F8 TEL;CELL:13912341234 END:VCARD

完整源代码见CSDN 搜索 C# 生成VCF demo源代码，支持Android，outlook QuotedPrintable 中文编码

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