c# - System.Argument异常:Specified argument was out of range of valid value

经过几次修复后，我仍然遇到一个令人讨厌的错误。我使用VS2013的开发人员命令提示符调试和运行服务器，并使用VS 2013运行客户端。

首先，我运行服务器没有任何问题，但是，当我启动客户端时，将数据放在那里的textbox中，然后单击“发送”问题。

这是指示问题的服务器端代码。

IPAddress ipaddr=IPAddress.Parse("127.0.0.1");

TcpListener serverSocket = new TcpListener(ipaddr,8002);

int requestCount = 0;

TcpClient clientSocket = default(TcpClient);

serverSocket.Start();

Console.WriteLine(" >> Server Started");

clientSocket = serverSocket.AcceptTcpClient();

Console.WriteLine(" >> Accept connection from client");

requestCount = 0;

while ((true))
{
    try
    {
        requestCount = requestCount + 1;

        NetworkStream networkStream = clientSocket.GetStream();

        byte[] bytesFrom = new byte[10025];
        //issue stems out of here although i changed bytes size and tried too
        networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);

        string dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
        dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"));

        Console.WriteLine(" >> Data from client - " + dataFromClient);

        string serverResponse = "Last Message from client" + dataFromClient;

        Byte[] sendBytes = Encoding.ASCII.GetBytes(serverResponse);

        networkStream.Write(sendBytes, 0, sendBytes.Length);
        networkStream.Flush();

        Console.WriteLine(" >> " + serverResponse);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.ToString());
    }
}

clientSocket.Close();
serverSocket.Stop();

Console.WriteLine(" >> exit");
Console.ReadLine();

编辑:提出建议后，我进行了更改:

byte[] bytesFrom = new byte[10025];
networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);`

到

byte[] bytesFrom = new byte[clientSocket.ReceiveBufferSize];
networkStream.Read(bytesFrom, 0, bytesFrom.Length);

导致给出了屏幕截图，但没有收到来自客户端的数据。

错误(来自命令提示符):-



他们实际上在叫什么valid value。

PS。抱歉，如果我在此处提供的代码过长，但有必要

最佳答案

您应该将receiveBuffer size指定为第三个参数，而不是clientSocket.ReceiveBufferSizenetworkStream.Read(bytesFrom, 0, bytesFrom.Length);
或者

用clientSocket.ReceiveBufferSize创建一个缓冲区；

byte[] bytesFrom = new byte[clientSocket.ReceiveBufferSize];
networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);

这是来自Microsoft的示例:

while(true)
      {
        Console.Write("Waiting for a connection... ");

        // Perform a blocking call to accept requests.
        // You could also user server.AcceptSocket() here.
        TcpClient client = server.AcceptTcpClient();
        Console.WriteLine("Connected!");

        data = null;

        // Get a stream object for reading and writing
        NetworkStream stream = client.GetStream();

        int i;

        // Loop to receive all the data sent by the client.
        while((i = stream.Read(bytes, 0, bytes.Length))!=0)
        {
          // Translate data bytes to a ASCII string.
          data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
          Console.WriteLine("Received: {0}", data);

          // Process the data sent by the client.
          data = data.ToUpper();

          byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);

          // Send back a response.
          stream.Write(msg, 0, msg.Length);
          Console.WriteLine("Sent: {0}", data);
        }

        // Shutdown and end connection
        client.Close();
      }