主题：已知串口指令为a01d102 要怎么发送a01d102这个内容给串口呢？

怎么获取当前所有的端口  然后赋值给选择框呢？

Dim c1 As WinForm.ComboBox = e.Form.Controls("ComboBox1")
Dim s As String
For Each sp As String In Ports.PortNames
    s = sp
    s = s & "|"
    Output.Show(s)
Next
c1.ComboList = s

当前代码得到的数据输出为空？

zhDim s As String
For Each sp As String In Ports.PortNames
    If sp.Contains("COM") = False Then
        s = "空"
    Else
        s = s & "|" & sp
    End If
   
Next
Output.Show(s)

怎么判断当前是否存在com系列的串口号呢？不存在就提示未空  上述运行直接是空白

发送字节  按钮代码如下：

红色部分要怎么表示呢？

Dim t1 As WinForm.TextBox = e.Form.Controls("TextBox1")

Dim c1 As WinForm.ComboBox = e.Form.Controls("ComboBox1")

Dim Val()As Byte = New Byte() {t1.Text}

Ports(c1.Text).Write(Val, 0, Val.Length)

帮助中的{49,50,51,52}这个代表什么意思呢？