AsyncTcpSocket

this is a Class Library about tcp socket ,it is based on dot netcore 3.1, the classLib was created by Dennis Gao,I developed server-side and client-side desktop applications that can be uses for testing.

• Messages are sent in bytes, increasing the message length in the protocol header to prevent interception of messages of wrong length

/// <summary>
/// 待发送字符串加长度头后转字节数组
/// </summary>
/// <param name="sendMsg">待转换字符串</param>
/// <returns></returns>
public static byte[] ConvertToByteData(string sendMsg)
{
    byte[] data = Encoding.UTF8.GetBytes(sendMsg);
    byte[] sendData = new byte[sizeof(int)+ data.Length];
    byte[] dataLen = BitConverter.GetBytes(data.Length);
    sendData = dataLen.Concat(data).ToArray();
    return sendData;
}

/// <summary>
/// 收到的字节数组还原成消息字符串
/// </summary>
/// <param name="receiveData">待转换消息字节数组</param>
/// <returns></returns>
public static string ConvertToStrData(byte[] receiveData)
{
    string receiveStr = string.Empty;
    byte[] dataLen = receiveData.Take(sizeof(int)).ToArray();
    int msgLen = BitConverter.ToInt32(dataLen);
    byte[] receiveMsg = receiveData.Skip(sizeof(int)).Take(msgLen).ToArray();
    receiveStr = Encoding.UTF8.GetString(receiveMsg);
    return receiveStr;
}

• If you want to use the Winform designer,You must be using Visual Studio 16.5 Preview 1 or a later version.You need to enable the designer in Visual Studio.

  Go to Tools > Options > Environment > Preview Features and select the Use the preview Windows Forms designer for .NET Core apps option.