ASP.NET

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)<br />
    {<br />
     <br />
           SqlDataSource1.SelectCommand="select * from cities where idcity="+dropdownlist1.SelectedValue;<br />
                DropDownList2.DataSourceID = "SqlDataSource1";<br />
                dropDownList2.DataValueField = "IDCity";<br />
                dropDownList2.DataTextField = "CityName";<br />
                dropDownList2.DataBind();<br />
}

yesu prakash wrote:

When i try to access the link above 10 or 12 pages it show page cannot found error. When refresh the already opened pages, same error.

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
        
// Add the current authentication cookie to the request
HttpCookie cookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
Cookie authenticationCookie = new Cookie(FormsAuthentication.FormsCookieName,
                                                    cookie.Value,
                                                    cookie.Path,
                                                    HttpContext.Current.Request.Url.Authority);

req.CookieContainer = new CookieContainer();
req.CookieContainer.Add(authenticationCookie);

WebResponse res = req.GetResponse();