//报头
context.Response.ContentType="image/JPEG";
string newFileName = HttpUtility.UrlEncode(fileName);
context.Response.AddHeader("Content-Disposition", "attachment:filename=" + newFileName);
//根据ID获取数据
int user_id = (int)context.Session["登陆的ID"];
T_userInfoTableAdapter adapter = new T_userInfoTableAdapter();
var data = adapter.GetDataById(user_id);
var user = data.Single();
if (user.iLevel == 0) //普通用户
{
using (System.Drawing.Bitmap bitImage = new System.Drawing.Bitmap("image/" + fileName))
{
//设置画布
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitImage))
{
g.DrawString("免费用户试用——"+user.sUserName, new System.Drawing.Font("宋体", 20),Brushes.Red, 0, 0);
}
//保存到输出流中
bitImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
else//收费用户
{
context.Response.WriteFile("image/"+fileName);
}
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
跳转页面：Target.htm
复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>跳转中</title>
</head>
<body>
请先登录，页面将在5秒以后转向登陆页面，如果
您想立即进入登录界面，请<a href="https://www.jb51.net/login.aspx">点击这里</a>
<br/> 还剩<div></div>秒
</body>
</html>
<script type="text/javascript">
var leftSecond = 5;
setInterval(function () {
if (leftSecond <= 0) {
window.location.href = "https://www.jb51.net/login.aspx";
}
document.getElementById("leftDiv").innerHTML = leftSecond;
leftSecond--;
}, 1000)
</script>
总结：