UDP networking with multiple network

Question

I'm currently developing a network application on my machine with 2 network interfaces with the following setup -

I want to send UDP message by using the first configuration with IP 192.168.1.2.

using (var udpClient = new UdpClient(5556))
{
    udpClient.Connect(IPAddress.Parse("192.168.1.2"), 5556);
    // DO STUFF
}

When I try this I get the following error -

No connection could be made because the target machine actively refused it

奇怪的是,当我禁用我的其他网络,这是完美的,但有2个连接(局域网和WiFi)它不再工作...我猜它是发送错误的适配器？这是因为我的默认网关是相同的还是我做错了什么？我是开发基于网络的应用程序的新手......

Answer 1

您必须指定一个IPEndPoint网卡 IP，如下所示：

var endpoint = new IPEndPoint(IPAddress.Parse("192.168.1.2"), portNum);
UdpClient client = new UdpClient(endpoint);