C＃UDP广播发送和接收 [英] C# UDP Broadcast Send And Receive

问题描述

大家好：

我正在尝试创建一个代码，将LAN上的UDP消息广播到设备并接收广播回复。我已经能够成功地广播消息并查看广播响应。问题是我无法捕获广播响应。我正在从255.255.255.255端口15000发送广播消息。我也试图听这个相同的端口进行广播响应而没有运气。这就像我在听错了端口或其他东西。这是我的代码：

I am trying to create a code that will broadcast UDP messages across my LAN to devices and receive the broadcast replies. I have been able to successfully broadcast messages and see the broadcast response. The problem is that i can't capture the broadcast response. I am sending the broadcast messages from 255.255.255.255 port 15000. I am also trying to listen to this same port for broadcast responses with no  luck. It's like i'm listening on the wrong port or something. Here is my code:

Code Snippet

推荐答案

更改

string returnData =编码。 ASCII.GetString（receiveBytes）;

string returnData = Encoding.ASCII.GetString(receiveBytes);

到

string returnData = Encoding.ASCII.GetString（receiveBytes，0 ，receiveBytes.Length）;

udp.Close（）;

udp.Close();

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