NDEF 全称 NFC data exchange format 即 nfc 数据交换格式，是一种标准化的数据格式，可用于在任何兼容的NFC设备与另一个NFC设备或标签之间交换信息。数据格式由NDEF消息和NDEF记录组成。
NDEF信息可以写到不同类型的NFC芯片中，如Ntag系列芯片标、15693系列芯片、MifareClassic系列芯片、Forum_Type4_Tag标签等，不同类型的芯片NDEF信息的存储方式也略有不同，这就大大增加了NDEF信息写入、读取的难度。
广州荣士电子将各种不同类型的NDEF记录类型的写入、读取方式都函数化，开发人员不需再了解复杂的NDEF记录格式，只需调用相应的函数就可快速写入正确的NDEF信息。
本示例使用的发卡器：Android Linux RFID读写器NFC发卡器WEB可编程NDEF文本/智能海报/-淘宝网 (taobao.com)
NDEF函数声明
//------------------------------------------------------------------------------------------------------------------------------------------------------
//外部函数声明：让设备发出声响
[DllImport("OUR_MIFARE.dll", EntryPoint = "pcdbeep", CallingConvention = CallingConvention.StdCall)]
static extern byte pcdbeep(UInt32 xms);//xms单位为毫秒
//------------------------------------------------------------------------------------------------------------------------------------------------------
//读取设备编号，可做为软件加密狗用,也可以根据此编号在公司网站上查询保修期限
[DllImport("OUR_MIFARE.dll", EntryPoint = "pcdgetdevicenumber", CallingConvention = CallingConvention.StdCall)]
static extern byte pcdgetdevicenumber(byte[] devicenumber);//devicenumber用于返回编号
//------------------------------------------------------------------------------------------------------------------------------------------------------
//清空MifareClass卡类标签NDEF数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_clear", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_clear();//
//------------------------------------------------------------------------------------------------------------------------------------------------------
//清空ForumType4类标签NDEF数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_forumtype4_clear", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_forumtype4_clear();//
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF文本类型数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_addtext", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_addtext(string languagecodestr, int languagecodestrlen, string textstr, int textstrlen);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_adddata", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_adddata(string typestr, int typestrlen, string datastr, int datastrlen);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF URI数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_adduri", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_adduri(string languagecodestr, int languagecodestrlen, string titlestr, int titlestrlen, int uriheaderindex, string uristr, int uristrlen);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF电子名片数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_addbusinesscard", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_addbusinesscard(string infostr, int infostrlen);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF热点连接数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_addwifi", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_addwifi(string ssidstr, int ssidstrlen,int authtype,int crypttype,string keystr,int keystrlen );
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF蓝牙连接数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_addbluetooth", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_addbluetooth(string blenamestr, int blenamestrlen, byte[] blemac);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//生成NDEF启动应用数据缓冲
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_addapp", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_addapp(string packagestr, int packagestrlen);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//解析数据缓冲中的NDEF信息
[DllImport("OUR_MIFARE.dll", EntryPoint = "tagbuf_read", CallingConvention = CallingConvention.StdCall)]
static extern byte tagbuf_read(byte[] revstr, byte[] revstrlen, byte[] recordnumber);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//将NDEF数据缓冲写入MifareClasss标签
[DllImport("OUR_MIFARE.dll", EntryPoint = "piccwrite_ndeftag", CallingConvention = CallingConvention.StdCall)]
static extern byte piccwrite_ndeftag(byte ctrlword, byte[] serial, byte[] oldkey, byte[] newkey);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//清空MifareClasss类NDEF标签
[DllImport("OUR_MIFARE.dll", EntryPoint = "piccclear_ndeftag", CallingConvention = CallingConvention.StdCall)]
static extern byte piccclear_ndeftag(byte ctrlword, byte[] serial, byte[] oldkey);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//读取MifareClasss标签内的NDEF信息
[DllImport("OUR_MIFARE.dll", EntryPoint = "piccread_ndeftag", CallingConvention = CallingConvention.StdCall)]
static extern byte piccread_ndeftag(byte ctrlword, byte[] serial, byte[] oldkey);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//将NDEF数据缓冲写入ForumType4标签
[DllImport("OUR_MIFARE.dll", EntryPoint = "forumtype4_write_ndeftag", CallingConvention = CallingConvention.StdCall)]
static extern byte forumtype4_write_ndeftag(byte ctrlword, byte[] serial, byte[] seriallen, byte[] ndefwritekey);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//读取ForumType4标签内的NDEF信息
[DllImport("OUR_MIFARE.dll", EntryPoint = "forumtype4_read_ndeftag", CallingConvention = CallingConvention.StdCall)]
static extern byte forumtype4_read_ndeftag(byte ctrlword, byte[] serial, byte[] seriallen, byte[] ndefwritekey);
//-------------------------------------------------------------------------------------------------------------------------------------------------------
//读取Ntag卡
[DllImport("OUR_MIFARE.dll", EntryPoint = "piccreadex_ntag", CallingConvention = CallingConvention.StdCall)]
public static extern byte piccreadex_ntag(byte ctrlword, byte[] serial, byte[] picckey, byte blockadd, byte blocksize, byte[] piccdata);
//-------------------------------------------------------------------------------------------------------------------------------------------------------
//读取15693卡
[DllImport("OUR_MIFARE.dll", EntryPoint = "iso15693readex", CallingConvention = CallingConvention.StdCall)]
static extern byte iso15693readex(byte flags, byte afi, byte startblock, byte blocknum, byte[] uid, byte[] revbuf);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//轻松读MifareClass卡
[DllImport("OUR_MIFARE.dll", EntryPoint = "piccreadex", CallingConvention = CallingConvention.StdCall)]
static extern byte piccreadex(byte ctrlword, byte[] serial, byte area, byte keyA1B0, byte[] picckey, byte[] piccdata0_2);
//------------------------------------------------------------------------------------------------------------------------------------------------------
//轻松读forumtype4卡
[DllImport("OUR_MIFARE.dll", EntryPoint = "forumtype4request", CallingConvention = CallingConvention.StdCall)]
static extern byte forumtype4request(byte ctrlword, byte[] serial, byte[] seriallen);写入NDEF文本
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
string languagecodestr = "en"; //语言编码，英文为en,中文为zh
int languagecodestrlen = languagecodestr.Length;
string textstr = textBox1.Text.Trim();
int textstrlen = System.Text.Encoding.GetEncoding(936).GetBytes(textstr).Length;
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addtext(languagecodestr, languagecodestrlen, textstr, textstrlen);
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF纯文本标签写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF纯文本标签数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_forumtype4_clear(); //清空标签数据缓冲
status = tagbuf_addtext(languagecodestr, languagecodestrlen, textstr, textstrlen);
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF纯文本标签写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF纯文本标签数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
}写入NDEF智能海报
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
string languagecodestr = "en"; //语言编码，英文为en,中文为zh
int languagecodestrlen = languagecodestr.Length;
string titlestr = textBox4.Text.Trim(); //标题
int titlestrlen = System.Text.Encoding.GetEncoding(936).GetBytes(titlestr).Length; //标题长度
int uriheaderindex = comboBox1.SelectedIndex; //前缀
string uristr = textBox5.Text.Trim(); //uri
int uristrlen = System.Text.Encoding.GetEncoding(936).GetBytes(uristr).Length; //uri长度
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_adduri(languagecodestr, languagecodestrlen, titlestr, titlestrlen, uriheaderindex, uristr, uristrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF智能海报写入成功！！", "示例提示",MessageBoxButtons.OK, MessageBoxIcon.Information );
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF智能海报数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_forumtype4_clear(); //清空标签数据缓冲
status = tagbuf_adduri(languagecodestr, languagecodestrlen, titlestr, titlestrlen, uriheaderindex, uristr, uristrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF智能海报写入成功！！", "示例提示",MessageBoxButtons.OK, MessageBoxIcon.Information );
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF智能海报数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
}写入电子名片
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
string infostr = "BEGIN:VCARD"+"\n"; //语言编码，英文为en,中文为zh
infostr = infostr + "VERSION:3.0" + "\n";
infostr = infostr + "FN:" +textBox12.Text.Trim() + "\n"; //姓名
infostr = infostr + "TEL:" + textBox11.Text.Trim() + "\n"; //电话
infostr = infostr + "ORG:" + textBox10.Text.Trim() + "\n"; //单位名称
infostr = infostr + "ADR:" + textBox15.Text.Trim() + "\n"; //地址
infostr = infostr + "EMAIL:" + textBox13.Text.Trim() + "\n";//邮箱
infostr = infostr + "URL:" + textBox14.Text.Trim() + "\n"; //官网
infostr = infostr + "END:VCARD" + "\n";
int infostrlen = System.Text.Encoding.GetEncoding(936).GetBytes(infostr).Length; //名片长度
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addbusinesscard(infostr, infostrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF电子名片写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF电子名片数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addbusinesscard(infostr, infostrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF电子名片写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF电子名片数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
} 写入WIFI连接
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
string ssidstr = textBox16.Text.Trim() ; //热点名称
int ssidstrlen = System.Text.Encoding.GetEncoding(936).GetBytes(ssidstr).Length; //热点名称长度
int authtype = comboBox2.SelectedIndex; //认证方式
int crypttype = comboBox3.SelectedIndex;//加密算法
string keystr = textBox17.Text.Trim(); //密码
int keystrlen = System.Text.Encoding.GetEncoding(936).GetBytes(keystr).Length; //密码长度
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addwifi(ssidstr, ssidstrlen, authtype, crypttype, keystr, keystrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF无线连接写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF无线连接数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addwifi(ssidstr, ssidstrlen, authtype, crypttype, keystr, keystrlen); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF无线连接写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF无线连接数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
} 写入地图坐标
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
string languagecodestr = "en"; //语言编码，英文为en,中文为zh
int languagecodestrlen = languagecodestr.Length;
string titlestr = textBox7.Text.Trim(); //标题
int titlestrlen = System.Text.Encoding.GetEncoding(936).GetBytes(titlestr).Length; //标题长度
int uriheaderindex = 0; //地理位置没有链接前缀
string uristr = "geo:" + textBox6.Text.Trim() + "," + textBox8.Text.Trim();
int uristrlen = System.Text.Encoding.GetEncoding(936).GetBytes(uristr).Length; //uri长度
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_adduri(languagecodestr, languagecodestrlen, titlestr, titlestrlen, uriheaderindex, uristr, uristrlen);
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF地图坐标写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF地图坐标数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_adduri(languagecodestr, languagecodestrlen, titlestr, titlestrlen, uriheaderindex, uristr, uristrlen);
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF地图坐标写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF地图坐标数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
}写入蓝牙连接
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] newpicckey = new byte[6]; //卡片新密码
byte[] mypiccseriallen = new byte[1];
byte[] macbuf = new byte[6]; //设备MAC地址
string blenamestr = textBox19.Text.Trim(); //设备名称
int blenamestrlen = System.Text.Encoding.GetEncoding(936).GetBytes(blenamestr).Length; //设备名称长度
string[] macstr = textBox18.Text.Split(new char[2] { ':', ':' });//设备MAC地址
try
{
macbuf[0] = (byte)Convert.ToInt32(macstr[0], 16);
macbuf[1] = (byte)Convert.ToInt32(macstr[1], 16);
macbuf[2] = (byte)Convert.ToInt32(macstr[2], 16);
macbuf[3] = (byte)Convert.ToInt32(macstr[3], 16);
macbuf[4] = (byte)Convert.ToInt32(macstr[4], 16);
macbuf[5] = (byte)Convert.ToInt32(macstr[5], 16);
}
catch
{
MessageBox.Show("蓝牙设备的MAC地址输入错误，请输入正确的MAC地址！" , "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
textBox18.Select();
return;
}
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addbluetooth(blenamestr, blenamestrlen, macbuf); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0x80 + 0x10;
status = piccwrite_ndeftag(myctrlword, mypiccserial, oldpicckey, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF蓝牙连接写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF蓝牙连接数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
case 4: //ForumType4标签
tagbuf_clear(); //清空标签数据缓冲
status = tagbuf_addbluetooth(blenamestr, blenamestrlen, macbuf); //可以用此方法写入多条记录
if (status == 0)
{
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_write_ndeftag(myctrlword, mypiccserial, mypiccseriallen, newpicckey);
if (status == 0)
{
pcdbeep(38);
MessageBox.Show("NDEF蓝牙连接写入成功！！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else { disperrinf(status); }
}
else { MessageBox.Show("生成NDEF蓝牙连接数据缓冲时返回码错误代码:" + status, "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error); }
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
} 读取NDEF标签信息
byte status;
byte myctrlword;//控制字
byte[] mypiccserial = new byte[8];//卡序列号
byte[] oldpicckey = new byte[6]; //卡片旧密码
byte[] mypiccseriallen = new byte[1];
byte[] revstrlen=new byte[1];
byte[] recordnumber=new byte[1] ;
byte[] mypiccdata=new byte[2048];
textBox21.Text = "";
status = 255;
int cardtype = checkcardtype();
switch (cardtype)
{
case 1: //Ntag2x标签
break;
case 2: //15693标签
break;
case 3: //MifareClass标签
myctrlword = 0x80 + 0x10;
status = piccread_ndeftag(myctrlword, mypiccserial, oldpicckey);
break;
case 4: //ForumType4标签
myctrlword = 0; //0表示标签无密码，如设置密码取值 &H40 ，mypicckey 存放密码
status = forumtype4_read_ndeftag(myctrlword, mypiccserial, mypiccseriallen, oldpicckey);
break;
default:
MessageBox.Show("请刷有效的NFC标签！", "示例提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
break;
}
if (status == 0)
{
pcdbeep(38);
tagbuf_read(mypiccdata, revstrlen, recordnumber);
string ndefstr = Encoding.Default.GetString(mypiccdata);
textBox21.Text = ndefstr;
} 
