protected void Page_Load(object sender, EventArgs e) { CommonHelper.SetResponseNoCache(Response); if (this.Session["CaptchaImageText"] == null) this.Session["CaptchaImageText"] = CommonHelper.GenerateRandomDigitCode(6); Captcha ci = new Captcha(this.Session["CaptchaImageText"].ToString(), 200, 50, "Century Schoolbook"); this.Response.Clear(); this.Response.ContentType = "image/jpeg"; ci.Image.Save(this.Response.OutputStream, ImageFormat.Jpeg); ci.Dispose(); }
protected void Page_Load(object sender, EventArgs e) { Response.CacheControl = "private"; Response.Expires = 0; Response.AddHeader("pragma", "no-cache"); if (this.Session["CaptchaImageText"] == null) this.Session["CaptchaImageText"] = CommonHelper.GenerateRandomDigitCode(6); Captcha ci = new Captcha(this.Session["CaptchaImageText"].ToString(), 200, 50, "Century Schoolbook"); this.Response.Clear(); this.Response.ContentType = "image/jpeg"; ci.Image.Save(this.Response.OutputStream, ImageFormat.Jpeg); ci.Dispose(); }