private void CreateYZM(HttpContext context)
{
// 在此处放置用户代码以初始化页面
context.Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache); //不缓存
Common.YZMHelper yz = new Common.YZMHelper();
context.Session["validcode"] = yz.Text; //将验证字符写入Session，供前台调用
MemoryStream ms = new MemoryStream();
yz.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
yz.Image.Dispose();
context.Response.ClearContent();
context.Response.ContentType = "image/Gif";
context.Response.BinaryWrite(ms.ToArray());
}
private void CreateYZM(HttpContext context)
{
// 在此处放置用户代码以初始化页面
context.Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache); //不缓存
Common.YZMHelper yz = new Common.YZMHelper();
context.Session["validcode"] = yz.Text; //将验证字符写入Session，供前台调用
MemoryStream ms = new MemoryStream();
yz.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
yz.Image.Dispose();
context.Response.ClearContent();
context.Response.ContentType = "image/Gif";
context.Response.BinaryWrite(ms.ToArray());
}
//获取验证码
public void VerifyChars()
{
Response.ContentType = "image/Png";
// 在此处放置用户代码以初始化页面
Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache); //不缓存
Common.YZMHelper yz = new Common.YZMHelper();
yz.CreateImage();
Session["checkcode"] = yz.Text; //将验证字符写入Session，供前台调用
MemoryStream ms = new MemoryStream();
yz.Image.Save(ms, ImageFormat.Png);
//Response.ClearContent(); //需要输出图象信息 要修改HTTP头
Response.BinaryWrite(ms.ToArray());
yz.Image.Dispose();
//Response.End();
//return ms.ToArray();
}