public static string CreateQrCode(string scanUrl, out string squarePicUrl)
{
squarePicUrl = null;
try
{
string logo_png = HttpContext.Current.Server.MapPath("~/qrcode_logo.png");
Bitmap bmp = QrCodeHelper.CreateQrCode(scanUrl, logo_png);
//int borderOffset = 30;
//int h = bmp.Height + borderOffset * 2;
//int w = h * 9 / 5;
//Bitmap tmpBmp = new Bitmap(w, h);
//int offsetX = (tmpBmp.Width - tmpBmp.Height) / 2 + borderOffset;
//int offsetY = borderOffset;
//Graphics g = Graphics.FromImage(tmpBmp);
//g.FillRectangle(Brushes.White, 0, 0, tmpBmp.Width, tmpBmp.Height);
//g.DrawImage(bmp, offsetX, offsetY, bmp.Width, bmp.Height);
int w = bmp.Width;
int h = bmp.Height;
Bitmap tmpBmp = new Bitmap(w + 10, h + 10);
Graphics g = Graphics.FromImage(tmpBmp);
g.FillRectangle(Brushes.White, 0, 0, tmpBmp.Width, tmpBmp.Height);
g.DrawImage(bmp, 5, 5, w, h);
string filename = "/pics/qrcode/" + DateTime.Today.ToString("yyyyMM") + "/" + DateTime.Today.ToString("dd") + "/" + Guid.NewGuid().ToString("N") + ".png";
string fullpath = HttpContext.Current.Server.MapPath("~" + filename);
string dir = System.IO.Path.GetDirectoryName(fullpath);
if (!System.IO.Directory.Exists(dir))
{
System.IO.Directory.CreateDirectory(dir);
}
tmpBmp.Save(fullpath);
string squareFullpath = fullpath.Replace(".png", "_square.png");
bmp.Save(squareFullpath);
squarePicUrl = filename.Replace(".png", "_square.png").Replace("\\", "/");
return(filename.Replace("\\", "/"));
}
catch (Exception ex)
{
LogHelper.WriteError("二维码管理", "生成QRCode图片失败", ex);
}
finally
{
GC.Collect();
}
return(null);
}
private async void ConnectAsHost(string username)
{
await WebSocketClient.Instance.ConnectToServerAsync();
WebSocketClient.Instance.RegisterForMessage <LoginResponse>(HandleLoginResponse);
WebSocketClient.Instance.RegisterForMessage <PlayerJoinedResponse>(HandlePlayerJoined);
WebSocketClient.Instance.RegisterForMessage <TimerResponse>(HandleTimerResponse);
await WebSocketClient.Instance.SendMessageAsync(new LoginMessage()
{
@event = "login", username = username
});
GameLogic.Instance.Self = new Player()
{
PlayerName = username
};
QrCodeHelper.CreateQrCode(username);
}
private async void btnImg_Clicked(object sender, EventArgs e)
{
await QrCodeHelper.CreateQrCode("test alex");
ImageQr.Source = QrCodeHelper.img;
}