.Net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";
}