防止网页后退--禁止缓存~

protected void Page_Load(object sender, EventArgs e)
{
//防止网页后退--禁止缓存

    Response.Expires = 0;
    Response.Buffer = true;
    Response.ExpiresAbsolute = DateTime.Now.AddSeconds(-1);
    Response.AddHeader("pragma", "no-cache");
    Response.CacheControl = "no-cache";
}