whenever I am clicking the logout button it is going to the logout page but Timer1_Tick function is not working and the execution is being stopped in the logout page.It is not going to GuestUser_HOME.aspx page.
The code in the logout page is here.
public partial class WebForm24 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetNoStore();
}
protected void Timer1_Tick(object sender, EventArgs e)
{
//string redirectUrl = FormsAuthentication.LoginUrl + "?
ReturnUrl=index2.html";
FormsAuthentication.SignOut();
Session["email"] = null;
Response.Redirect("GuestUser_HOME.aspx");
}
}
Are you sure your timer had started !?
check IsEnabled property before runtime to find out it`s enable or not.
but a better solution is like below ,
first :
Create a function for implement sign out operation.
second :
use this function in right place , for example in Click Event of button or Page Load event of sign out page.
third :
if you want implement this operation in a TimerTickEvent , you must stop timer after complete log out operation , and check if user logged in run SignOut operation not e
Related
My code looks like:
protected void Page_Load(object sender, EventArgs e)
{
if(IsPostback)
{
if(/* User is not authenticated to perform any actions on this page */)
{
Response.Redirect(/* Error Page */);
}
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
/* do some stuff */
}
I would have guessed that if I submit the button to do a postback and I was not authenticated, then in the Page_Load the redirect would happen and would send back an HTTP 302. However, it appears that it runs the Response.Redirect line of code, keeps processing past it in Page_Load, and then even runs btnSubmit_Click afterwards. The response is not the error page.
I can put a return call after the Response.Redirect to prevent further processing in that function, but the btnSubmit_Click function will still get run.
Why would it work this way?
To prevent more code from processing, use this:
Response.Redirect(url, true);
The second parameter will end further processing instead.
I have a user control of menu which have links on which user is redirected to the desired page. When I am using that user control in my aspx page, on first time when user click to the link he is redirected to the destination, but when user again click that link it is showing the page stating that "cannot find server", the same thing is happened to the other links also.
In my user control I am using:
Private void Link1_Click(Object sender, eventargs e)
{
Response.Redirect("Secondpage.aspx");
}
Private void Link2_Click(Object sender, eventargs e)
{
Response.Redirect("Thirdpage.aspx");
}
Unexpectdly, the same code is working fine on the production server but throwing issue in the developmwnt server.
I am not sure the cause of the error.. Thanks in advance.
your event is not found on the server as it is defined as Private
I think Private should be Protected
Protected void Link2_Click(Object sender, eventargs e)
{
Response.Redirect("Thirdpage.aspx");
}
I have a page Product.aspx,there I have a user control ProductDisplay.ascx which has been created by drag and drop.
Now when a button is clicked in ProductDisplay.ascx,I want a logging function to be called which is in Product.aspx.
To achieve this I have used delegates
on ProductDisplay.ascx
public delegate void LogUserActivity(ProductService objService);
public event LogUserActivity ActivityLog;
on Product.aspx
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ProductDisp.ActivityLog += new User_UserControl_ProductDisplayBox.LogUserActivity(LogProduct);
}
}
Now button click event of ProductDisplay.ascx
protected void imgBtnBuyNow_Click(object sender, ImageClickEventArgs e)
{
if (ActivityLog != null)
{
ActivityLog(Product);
}
Response.Redirect("~/User/ShoppingCart.aspx");
}
My problem is that whenever i click this button ActivityLog is null.Why is it null?
My idea is that once i click this button,page posts back and its previous state is lost.
Please help me out with a reason and solution.
Secondly,I want to do away with null checking
**if (ActivityLog != null)**
{
ActivityLog(Product);
}
I saw some code which instantiates a delegate with a default value the moment it is declared,but i was not able to find it.Please help.
I have found solution to first problem
if (!IsPostBack)
{
ProductDisp.ActivityLog += new User_UserControl_ProductDisplayBox.LogUserActivity(LogProduct);
}
This was causing the issue.Move this line
ProductDisp.ActivityLog += new User_UserControl_ProductDisplayBox.LogUserActivity(LogProduct);
out of if (!IsPostBack)
I need to insert a bit of Javascript into the process when a Web Form is submitted, but after the client side validation takes place.
RegisterOnSubmitStatement seems to place the javascript before the validation.
Anyone know how to get it to render after?
Solution found:
In a web control, I put something like this:
protected override OnInit(EventArgs e) {
Page.SaveStateComplete += new EventHandler(RegisterSaveStuff);
base.OnInit(e);
}
void RegisterSaveStuff(object sender, EventArgs e) {
Page.ClientScript.RegisterOnSubmitStatement(typeof(Page), "name", "JS code here");
}
that´s right, the RegisterOnSubmitStatement DO NOT WORK in the init function.
It should be called after in the page lige cycle.
I thing the right place therefor is:
"PreRenderComplete"
protected override OnInit(EventArgs e)
{
Page.PreRenderComplete+= new EventHandler(Page_PreRenderComplete);
base.OnInit(e);
}
void Page_PreRenderComplete(object sender, EventArgs e)
{
Page.ClientScript.RegisterOnSubmitStatement(typeof(Page), "name", "JS code here");
}
After some research online and playing around with it, I figured out that you can do it by hooking into the Page's SaveStateComplete event. I guess the validation submit statement is registered during the PreRender event, so if you register it after that (in the SaveStateComplete event) you can get it afterward.
You do have to re-register it, but that's not a big deal because I'm not relying on ViewState for my JS.
Duplicate of Asp.Net Button Event on refresh fires again??? GUID?
hello, ive a website and when a user click a button and the page postback, if the user refresh the Page or hit F5 the button method is called again.
any one know some method to prevent page refresh with out redirect the page to the same page again ?
something like if (page.isRefresh) or something... or if exist any javascript solution is better.
this seen to works.... but when i refresh it does not postback but show the before value in the textbox
http://www.dotnetspider.com/resources/4040-IsPageRefresh-ASP-NET.aspx
private Boolean IsPageRefresh = false;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["postids"] = System.Guid.NewGuid().ToString();
Session["postid"] = ViewState["postids"].ToString();
TextBox1.Text = "Hi";
}
else
{
if (ViewState["postids"].ToString() != Session["postid"].ToString())
{
IsPageRefresh = true;
}
Session["postid"] = System.Guid.NewGuid().ToString();
ViewState["postids"] = Session["postid"];
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (!IsPageRefresh) // check that page is not refreshed by browser.
{
TextBox2.Text = TextBox1.Text + "#";
}
}
Thanks for comments and sorry for my mistake,
I found this code in:
http://www.codeproject.com/KB/aspnet/Detecting_Refresh.aspx
And this time tested ;)
private bool _refreshState;
private bool _isRefresh;
protected override void LoadViewState(object savedState)
{
object[] AllStates = (object[])savedState;
base.LoadViewState(AllStates[0]);
_refreshState = bool.Parse(AllStates[1].ToString());
_isRefresh = _refreshState == bool.Parse(Session["__ISREFRESH"].ToString());
}
protected override object SaveViewState()
{
Session["__ISREFRESH"] = _refreshState;
object[] AllStates = new object[2];
AllStates[0] = base.SaveViewState();
AllStates[1] = !(_refreshState);
return AllStates;
}
protected void btn_Click(object sender, EventArgs e)
{
if (!_isRefresh)
Response.Write(DateTime.Now.Millisecond.ToString());
}
You can test for the Page.IsPostBack property to see if the page is responding to an initial request or if it's handling a PostBack such as your button click event. Here's a bit more information: w3schools on IsPostBack
Unfortunately that's not going to solve your problem since IsPostBack will be true when the user clicks the button as well as when they refresh the page after the button action has taken place.
If you're doing a task like performing CRUD on some data, you can Response.Redirect the user back to the same page when you're done processing and get around this problem. It has the side benefit of reloading your content (assuming you added a record to the DB it would now show in the page...) and prevents the refresh problem behavior. The only caveat is they still resubmit the form by going back in their history.
Postbacks were a bad implementation choice for the Asp.net and generally are what ruin the Webforms platform for me.
This doesn't solve the problem.
First of all, storing a token in the view state is not a good idea, since it can be disabled. Use control state instead. Although, a HttpModule is a better solution.
All in all, this will not work anyway. If you open another tab/window the session will be invalid for the previous tab/window. Therefore braking it. You must somehow store a unique value each time a page is first loaded. Use that to determine where the request came from and then check the "refresh ticket". As you may see, the object for one user might get pretty big depending on the amount of requests made, where and how long you store this information.
I haven't seen any solution to this I'm afraid, as it is pretty complex.
bool IsPageRefresh ;
if (Page.IsPostBack)
{
if (ViewState["postid"].ToString() != Session["postid"].ToString())
IsPageRefresh = true;
}
Session["postid"] = System.Guid.NewGuid().ToString();
ViewState["postid"] = Session["postid"];
I tried many ways and I ended up looking for the form data sent when the postback / refresh is triggered... I found that there is a Key for any VIEWSTATE created and you can just compare those Keys like...
I put that on my custom basepage to reuse it like an Property
public bool IsPageRefresh = false;
protected void Page_Init(object sender, EventArgs e)
{
if (IsPostBack)
{
var rForm = Request.Form;
var vw = rForm["__EVENTVALIDATION"].ToString();
var svw = Session["__EVENTVALIDATION"] ?? "";
if (vw.Equals(svw)) IsPageRefresh = true;
Session["__EVENTVALIDATION"] = vw;
}
}