通过套接字网络发送图像

Question

我目前正在做一个小项目，使用tcp网络套接字创建会议应用程序。

我发现编码和解码字符串并将数据从服务器发送到客户端非常困难。我正在尝试将图片框图像发送给客户。

流程中涉及的方法和语句:( drawBox是图片框）

    private void SaveSnapshot()
    {
        Bitmap bmp = new Bitmap(drawBox.ClientSize.Width, drawBox.ClientSize.Height);
        drawBox.DrawToBitmap(bmp, drawBox.ClientRectangle);
        OnUpdatedDrawing(ImageToBase64(bmp, ImageFormat.Bmp));
    };
    public string ImageToBase64(Bitmap image, System.Drawing.Imaging.ImageFormat format)
    {
        using (MemoryStream ms = new MemoryStream())
        {
            // Convert Image to byte[]
            image.Save(ms, format);
            byte[] imageBytes = ms.ToArray();

            // Convert byte[] to base 64 string
            string base64String = Convert.ToString(imageBytes);
            return base64String;
        }
    }
    private void Drawboard_OnUpdatedDrawing(string data)
    {
        BroadCast("Draw|" + data);
    }
    private void BroadCast(string data)
    {
        foreach(var socket in Clients)
        {
            try { socket.Send(Encoding.ASCII.GetBytes(data)); }
            catch (SocketException SE) { MessageBox.Show("Error: " + SE.Message, "Error"); }
        }
    }

            case "Draw":
                this.Invoke(() =>
                {
                    byte[] NewBytes = Convert.FromBase64String(command[1]); // Contains the base 64 string of the picture box bitmap
                    MemoryStream ms1 = new MemoryStream();
                    Drawboard.drawBox.Image = Image.FromStream(ms1);
                    Drawboard.drawBox.Refresh();
                });

错误：参数无效。错误来自：

    private void ReadCallback(IAsyncResult AR)
    {
        try
        {
            var buffer = (byte[])AR.AsyncState;
            var receive = _Socket.EndReceive(AR);

            if (receive != 0)
            {
                var data = Encoding.ASCII.GetString(buffer, 0, receive);
                this.OnReceived(this, data);
            }
            else
            {
                this.OnDisconnected(this);
                this.isConnected = false;
                this.Close();
                return;
            }

            this._Socket.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, ReadCallback, buffer);
        }
        catch (Exception ex)
        {
            OnErrorReceived(this, ex.Message + "\n\nError connecting to the server");
        }
    }

GUI Error