public static void NewCode(string vctype)
{
CaptchaImage validate = new CaptchaImage(12, 50);
validate.strFont = "宋体";
validate.nFontSize = 13;
MemoryStream stream = validate.GetCode(1, 4, 58, 22);
Guid id;
lock (CodeCache)
{
id = Guid.NewGuid();
CodeCache[id] = new CodeInf {
Code = validate.strValidate, Time = DateTime.Now
};
}
var Response = System.Web.HttpContext.Current.Response;
Response.Cookies.Add(new HttpCookie("vc_" + vctype, id.ToString())
{
HttpOnly = true
});
Response.ContentType = "image/jpeg";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Clear();
Response.BinaryWrite(stream.ToArray());
Response.Flush();
Response.End();
}