本示例使用的发卡器：https://item.taobao.com/item.htm?ft=t&id=615391857885
一、读取旧Ntag卡的UID和数据
vbnet
Private Sub Button15_Click(sender As Object, e As EventArgs) Handles Button15.Click
'轻松读卡
'技术支持:
'网站:
Dim i, j As Integer
Dim cardidhex, authkey, Str As String
Dim status, myctrlword, comedc As Byte '存放返回值
Dim mypiccserial(7) As Byte '卡序列号
Dim mypicckey(0 To 3) As Byte '认证密码
Dim mypiccdata(0 To 3) As Byte '读卡的数据缓冲，Ultralight卡及NTAG21x卡的数组长度必须为16个字节，写卡的为4个字节
Dim piccdata(0 To 8191) As Byte
Dim myblockaddr As Byte '起始块地址
Dim myblocksize As Byte '总块数
If CheckBox3.Checked Then
If Len(Trim(TextBox7.Text)) < 8 Then
i = MsgBox("卡认证密码位数不足！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
If i <> vbOK Then
TextBox7.Select()
Exit Sub
End If
Else
authkey = Trim(TextBox7.Text)
For i = 0 To 3
mypicckey(i) = CByte("&H" & Mid(authkey, i * 2 + 1, 2))
Next
End If
myctrlword = &H10 '需要认证卡密码后再继续
Else
myctrlword = 0
End If
myblockaddr = CByte(rwbeginp.Value)
myblocksize = CByte(rwps.Value)
j = 0
For i = myblockaddr To myblockaddr + myblocksize - 1
status = piccreadex_ntag(myctrlword, mypiccserial(0), mypicckey(0), i, 1, mypiccdata(0))
If status = 0 Then
piccdata(j * 4 + 0) = mypiccdata(0)
piccdata(j * 4 + 1) = mypiccdata(1)
piccdata(j * 4 + 2) = mypiccdata(2)
piccdata(j * 4 + 3) = mypiccdata(3)
j = j + 1
Else
Exit For
End If
Next
Select Case status
Case 0
pcdbeep(50)
cardidhex = ""
For i = 0 To 6
cardidhex = cardidhex + Strings.Right("00" + Hex(mypiccserial(i)), 2)
Next
TextBox8.Text = cardidhex
cardidhex = ""
For i = 0 To myblocksize * 4 - 1
cardidhex = cardidhex + Strings.Right("00" + Hex(piccdata(i)), 2)
Next
RichTextBox1.Text = cardidhex
lcddispfull("读卡成功！ ")
MsgBox("读卡成功！", MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "提示")
Case 8
lcddispfull("请将卡放在感应区！ ")
MsgBox("请将卡放在感应区！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 12
lcddispfull("读块" + Convert.ToString(i) + "失败，密码错误！ ")
MsgBox("读块" + Convert.ToString(i) + "失败，密码错误！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 13
lcddispfull("读块" + Convert.ToString(i) + "失败，可能需要验证密码！ ")
MsgBox("读块" + Convert.ToString(i) + "失败，可能需要验证密码！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 23
MsgBox("请连上USB读写器！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case Else
lcddispfull("读块" + Convert.ToString(i) + "时操作异常，返回代码：" + Convert.ToString(status) + " ")
MsgBox("读块" + Convert.ToString(i) + "时操作异常，返回代码：" + Convert.ToString(status), MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
End Select
End Sub二、将读取的UID和数据写入新标签
vbnet
Private Sub Button16_Click(sender As Object, e As EventArgs) Handles Button16.Click
'技术支持:
'网站:
Dim i, j As Integer
Dim cardidhex, authkey, Str, writstr As String
Dim status, myctrlword, comedc As Byte '存放返回值
Dim mypiccserial(7) As Byte '卡序列号
Dim mypicckey(0 To 3) As Byte '认证密码
Dim mypiccdata(0 To 3) As Byte '写卡的为4个字节
Dim myblockaddr As Byte '起始块地址
Dim myblocksize As Byte '总块数
Dim piccdata(0 To 8100) As Byte
Dim rwlen As Integer
If rwps.Value < 1 Then
MsgBox("写卡页数必须大于0！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Exit Sub
End If
myblockaddr = CByte(rwbeginp.Value)
myblocksize = CByte(rwps.Value)
If CheckBox3.Checked Then
If Len(Trim(TextBox7.Text)) < 8 Then
i = MsgBox("卡认证密码位数不足！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
If i <> vbOK Then
TextBox7.Select()
Exit Sub
End If
Else
authkey = Trim(TextBox7.Text)
For i = 0 To 3
mypicckey(i) = CByte("&H" & Mid(authkey, i * 2 + 1, 2))
Next
End If
myctrlword = &H10 '需要认证卡密码后再继续
Else
myctrlword = 0
End If
rwlen = myblocksize * 4
If Not checkhexstr(RichTextBox1.Text.Trim(), rwlen, piccdata) Then
MessageBox.Show("写卡信息不足,建议先读取对应块内数据后再改写！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error)
Return
End If
j = 0
For i = myblockaddr To myblockaddr + myblocksize - 1
mypiccdata(0) = piccdata(j * 4 + 0)
mypiccdata(1) = piccdata(j * 4 + 1)
mypiccdata(2) = piccdata(j * 4 + 2)
mypiccdata(3) = piccdata(j * 4 + 3)
If i = 2 Then
mypiccdata(2) = 0
mypiccdata(3) = 0
status = picclock_ntag(0, mypiccdata(0)) '2块的后两个字节是静态锁
Else
status = piccwriteex_ntag(myctrlword, mypiccserial(0), mypicckey(0), i, 1, mypiccdata(0))
End If
If status = 0 Then
j = j + 1
Else
Exit For
End If
Next
Select Case status
Case 0
pcdbeep(50)
cardidhex = ""
For i = 0 To 6
cardidhex = cardidhex + Strings.Right("00" + Hex(mypiccserial(i)), 2)
Next
TextBox8.Text = cardidhex
lcddispfull("写卡成功！ ")
MsgBox("写卡成功！", MsgBoxStyle.Information + MsgBoxStyle.OkOnly, "提示")
Case 8
lcddispfull("请将卡放在感应区！ ")
MsgBox("请将卡放在感应区！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 12
lcddispfull("写块" + Convert.ToString(i) + "时失败，卡密码错误！ ")
MsgBox("写块" + Convert.ToString(i) + "时失败，卡密码错误！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 14
lcddispfull("写块" + Convert.ToString(i) + "时失败，可能需要验证密码或页已经锁定！ ")
MsgBox("写块" + Convert.ToString(i) + "时失败，可能需要验证密码或页已经锁定！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case 23
MsgBox("请连上USB读写器！", MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
Case Else
lcddispfull("写块" + Convert.ToString(i) + "时操作异常，代码：" + Convert.ToString(status) + " ")
MsgBox("写块" + Convert.ToString(i) + "时操作异常，返回代码：" + Convert.ToString(status), MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "提示")
End Select
End Sub