public ActionResult GetCaptcha()
{
var randomText = captchaBLL.GenerateRandomText(4);
CaptchaHash = captchaBLL.ComputeMd5Hash(randomText);
return(File(captchaBLL.GenerateCaptchaImage(randomText), "image/gif"));
}
protected void Page_Load(object sender, EventArgs e)
{
//Captcha1.ImageStyle = BotDetect.ImageStyle.Negative;
//Captcha1.CustomDarkColor = Color.White;
//Captcha1.CustomLightColor = Color.FromArgb(72, 72, 72);
if (Page.IsPostBack)
{
// validate the Captcha to check we're not dealing with a bot
//bool isHuman = Captcha1.Validate(CaptchaControl1.Text);
//CaptchaControl1.Text = null; // clear previous user input
//if (!isHuman)
//{
// // TODO: Captcha validation failed, show error message
// Label_ErrorMsg.Text = "驗證碼錯誤!";
//}
//else
//{
// // TODO: Captcha validation passed, proceed with protected action
// //MvcCaptcha.ResetCaptcha("ExampleCaptcha");
// Label_ErrorMsg.Text = "";
//}
bool isHuman = Session["CAPTCHA"].ToString().Equals(CaptchaControl1.Text);
CaptchaControl1.Text = null; // clear previous user input
if (!isHuman)
{
// TODO: Captcha validation failed, show error message
Label_ErrorMsg.Text = "驗證碼錯誤!";
}
else
{
// TODO: Captcha validation passed, proceed with protected action
//MvcCaptcha.ResetCaptcha("ExampleCaptcha");
Label_ErrorMsg.Text = "";
}
CaptchaBLL captchaBll = new CaptchaBLL();
string captcha = captchaBll.GenerateRandomText(5);
byte[] arr = captchaBll.GenerateCaptchaImage(captcha);
Session["CAPTCHA"] = captcha;
Image1.ImageUrl = "data:image;base64," + Convert.ToBase64String(arr);
CaptchaCode.Text = captcha;
}
else
{
CaptchaBLL captchaBll = new CaptchaBLL();
string captcha = captchaBll.GenerateRandomText(5);
byte[] arr = captchaBll.GenerateCaptchaImage(captcha);
Session["CAPTCHA"] = captcha;
Image1.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(arr);
CaptchaCode.Text = captcha;
}
}
public ActionResult GetCaptcha()
{
// 隨機產生四個字元
var randomText = captchaBLL.GenerateRandomText(4);
// 加密後存在 Session，也可以不用加密，比對時一致就好。
CaptchaHash = randomText;
//CaptchaHash = captchaBLL.ComputeMd5Hash(randomText);
// 回傳 gif 圖檔
return(File(captchaBLL.GenerateCaptchaImage(randomText), "image/gif"));
}