如何检查我的串行端口是否没有在C＃中接收更多数据？

Question

I am trying to determine whether I am receiving data or not, since every time I run my program I am expecting a different amount of data. Here is my code to illustrate:`

List<int> Receiverlist = new List<int>();
 while (There is data from serialPort1 ) {
  serialinput = serialPort1.ReadChar();
  Receiverlist.Add(serialinput);
  }`

Do I need to add \\0 in the end of my list ?

Answer 1

You can use the BytesToRead property. It will show you whether data is in the received buffer. If so you can read it with one of the read methods.

In your code example you seem to read char by char

List<int> Receiverlist = new List<int>();

while (serialPort1.BytesToRead > 0) 
{
    string serialinput = serialPort1.ReadChar();
    Receiverlist.Add(serialinput);
}

another possibility would be to read the entire buffer and parse the input afterwards:

if(serialPort1.BytesToRead > 0) 
{
    string serialinput = serialPort1.ReadExisting();
    // parse the input according to your needs
}

Do I need to add \\0 in the end of my list ?

It depends on what your purpose is with this char. But to get the last element of a list you can just use:

int last = Receiverlist.Last();