If you click a button that takes you to a page using <a href....> is the session variable lost?
In VS testing the web app everything works perfect, but when it is pushed to production when the page is loaded the Session Variable is null?
For my current project I am using form authentication.What occasionally will happen is a user will timeout (unbeknownst to them),they try navigating to a different page (call it Page B) and they get kicked back to the login screen.This is fine and I have no problems with this.
However,after they enter their credentials and are authenticated they are redirected back to "Page B" and an error is produced because a session variable wasn't loaded. This is due to the fact that they were redirected to "Page B" instead of the page they would normally hit after a login (call it Page A).Is there anyway to force the user to go to Page A instead of Page B in these situation to avoid these errors?
I have a problem with a SessionVariable. I will explain what is happening:
1. From the default.aspx I send Session["LoginByAdmin"] = "Dummy"; and then redirect to this page where I have the code below. So the Page_Load sees that this Session["LoginByAdmin"] != null and enter this page. This works fine !
2. In the Page_Load, I later fill a ListBox1 with foldernames.
3. With Button1_Click1, I will now delete the choosen Folder in the ListBox1 wich works fine the first time and the ListBox updates the new existing folders in the ListBox. (I have wrapped this inside an updatepanel)
The problems comes now when I try to delete a choosen folder in the ListBox1 the second time in a row. When I select a Folder in the ListBox1 and now Press Button1, I will be redirected to "Default.aspx". This meens that this code is running: (That meens that Session["LoginByAdmin"] == null and I have not set this to null anywhere. This is my big question how this variable can be = null here?
if (Session["LoginByAdmin"] == null)
Response.Redirect("Default.aspx");
break;
[Code]....
I have some cascading dropdownlists using the ajax toolkit I have a set up datatables in an xsd file. Then use these in a webservice to populate all the fields ... this all works great but now i need to pass an additional paramter to the first dropdownlist ( a date) but don't know how to do this? The method is below...
[Code]....
The other code is:
[Code]....
The first change would be to the tableadapter to add a param to the code i.e
AuditWebDS.TeamsDataTable teams = teamsAdapter.GetTeams(calldate);
but how do i get the calldate param to the webservice method... i tried a session variable but it comes up with session is null ? Is there another better way?
Currently in an .aspx file, I am storing a value (filename that was created in that session) in an hidden text box. When the user clicks on the "Print" labeled Hyperlink control, it opens the file that was stored in the hidden text box control. But when the user goes to different screen (in the same session), I loose the filename value that is stored in the hidden text box control. So I would like to store the filename variable in a session variable. So that if the user leaves this .aspx file and comes back to this .aspx file I can load the value into the hidden text box from the session variable.
View 11 RepliesI want to show my data in next page with well formated in table.I all ready write code for session which show data in next page.but i want to show it in table format and i also want to comapre in database for a price and show too. this is my code for next page:
[Code]....
this code show me data but as i say iwant it in table format and want to comapare session varibles in database i want to show price accoding that particular product. The Pervious page code:
[Code]....
I am using ASP.NET..........
It is possible to create a session variable on page load just for a particular page/url?
The problem that I have is: The user comes to page 1 and the session variable becomes A, then he opens page 2 in a new tab and the session variable because B on both page 1 and page 2.
So when the user needs the session variable on page 1 it does not work because the variable have changed!
I want to extend the System.Web.UI.Page-class with some extra stuff.
In the ctor I need the value of a session-variable.
The problem is that the Session-object is null...
public class ExtendedPage : System.Web.UI.Page {
protected foo;
public ExtendedPage() {
this.foo = (int)HttpContext.Current.Session["foo"]; // NullReferenceException
}
}
If I move the part with the session-object into the Load-Event everything works fine...
public class ExtendedPage : System.Web.UI.Page {
protected foo;
public ExtendedPage() {
this.Load += new EventHandler(ExtendedPage_Load);
}
void ExtendedPage_Load(object sender, EventArgs e) {
this.foo = (int)HttpContext.Current.Session["foo"];
}
}
Why is the Session-object null in the first case??
how can I access a simple session state variable from any page?i would think to use: session("variableName")but that just doesnt work....
View 3 RepliesI am creating some sessions on successful login and I need to access them from my master page. How do I go about this?
public void showUser()
{
if (!string.IsNullOrEmpty(Session["User"].ToString()))
{
Response.Write(Session["User"].ToString());
}
else
{
Response.Write("Not Logged In");
}
}
IDE: MS Visual Studio 2008 / SQL Server 2005 Express / SQL Server Management Studio Express 2005
Skills: Beginner
Well im trying to make a custom login page(im not using ASP.net Login Control), in Admin.aspx page
UserName and Pasword are entered in textboxes , then Code-Behind file checks the UserName and Pasword against DataBase(it stores the UserName and Pasword) if both are correct Session["IsAuthenticated"] = "true" and then user is redirected to AdminArea.aspx
AdminArea.aspx checks if ( Session["IsAuthenticated"].ToString() == "false" ) then redirect to Error page..
but i get NullReferenceException on AdminArea.aspx because Session["IsAuthenticated"] is null , i dont know why ?
I even tried PreviousPage.Session["IsAuthneticated"] but still got the same error..
I debugged,and found out Admin.aspx saves value in Session["IsAuthenticated"] succesfully but AdminArea.aspx looses the Session["IsAuthenticated"]..so it gets null
My Question is how to retain value in Session["IsAuthenticated"] when page is changed (I want to retrieve value in next page from Session)?
i'm a asp.net c# beginner, i set a session variable in a.aspx but it's null when i try to retrieve it in b.aspx
below is .ashx file shows error on If context.Session("photo1") <> "" Then why? I need to display an image on button click that saved in database.
imgHandler.ashx:
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
If context.Session("photo1") <> "" Then
Dim bytes() As Byte = DirectCast(context.Session("photo1"), [Byte]())
context.Response.Buffer = True
[code]...
on display page on button click:Â
Session("photo1") = HttpUtility.HtmlEncode(ds.Tables(0).Rows(0)("applicant_photo").ToString())
Image1.ImageUrl = "../imgHandler.ashx"
I have logged in to the application and naviagate to Resource Editor page where it allows user to enter the value and saves to the resource file of the application.
After user clicks save button and navigate to different page the session value becomes null.
If the user navigate to different page without clicking save the session variable has its value
Im trying to use code provide in this link below.http://www.codeproject.com/KB/aspnet/MultipleTabWindows.aspxim trying to have the below code in my master page instead of adding to each page. it works if i add to each page, but when i add to ,master page the session value for "WindowName" is always null.how can i fix this?
<script language="javascript" type="text/javascript">if(window.name != "<%=GetWindowName()%>"){ window.name = "invalidAccess"; window.open("InvalidAccess.aspx", "_self");}</script>public string GetWindowName(){ return Session["WindowName"].ToString();}
I have a session variable which contains a list of elements. The user defines filters, which are sent to the Database, which fills the object with the elements that match. Then, that list is shown in a table. The code goes something like this:
[Code]....
Inside that page there is a button, which sends the request given the user filters. The Server creates the object and the session variable is assigned a value.
[Code]....
It works when the user sets the filters. However, given that once done it, the session variable has a value, I don't understand why if you navigate to other pages, the table doesn't appear when you return, given that:
1. It works when you perform the query and reload the page
2. The Session variable should be set for the rest of the session
Ive created an object and placed it in the session, then in my .ashx handler I want to get that object from the session. The problem is that its always null !
heres how ive placed the object into the session from an aspx page
[Code]....
I am working on a web application that is consuming a Dataset returned by a web service. As the application is running I store that Dataset as a session variable to be used over and over again as the user navigates to the different pages that will edit the tables within the dataset. The idea was the user will only have to wait for the data once when the application loads then the application would use the session variable until the user saves the changes they made, when that happens it would pass the edited tables to the service to update the database. Is there problems with this design and the storage of the Dataset and Datatables as a session variable?
View 4 RepliesI would like to wrap Session variables in a manner similar to that discussed on CodeProject.
[code]....
Here is my question: if I have to access CurrentUser multiple times in the same page, would I get a performance improvement by assigning it to a local variable instead of accessing the wrapping property? Or does the HttpSessionState make sure the object is only deserialized once per request, so that subsequent calls in the same http request don't cost any more?
Is it possible to use a session variable in the markup aspx page ?
Cause I have a gridview that use an sqldatasource and in the UpdateCommand I want to include a the session variable : session("username").
Ex :
UpdateCommand="UPDATE departments SET DEP_name = @DEP_name, DEP_active = @DEP_active, DEP_date_stamp = CONVERT (CHAR(8), GETDATE(), 112) + ' ' + CONVERT (VARCHAR(8), GETDATE(), 108),
DEP_user_stamp = <% session("username") %> WHERE (DEP_mnc = @original_DEP_mnc)">
This give me an error :
Server tags cannot contain <% .... %> constructs.
can we grab a global variable or Session or View State variable in the javascript or using jquery?
I have a web application which uses a session variable to store the logged in userid. If no user is logged in, of course this variable will be empty and the contents displayed on my website are meant for guests. If there is a user logged in, the user specific controls/access/links will then be a displayed.
I am now having issues with my hosting where on shared application pool, the worker recycle is triggered every 90 minutes, this will clear sessions causing all my users to be logged out. I opted for a dedicated application pool, which got worse because I am only allocated 50MB memory limit and if this is reached, the worker recycle is triggered and I lose my sessions again. I have tried as much as possible optimization techniques, e.g. dispose where possible, close connections, disable viewstate for static controls etc but my memory per instance keeps building up from page to page without any signs of improvement. I don't use loops nor store huge objects like bitmaps etc but my sessions are now gone even faster than 90 minutes in shared application pool before.
I have considered using SQL Session State but there isn't a simple guide on using this with MySQL. I am getting desperate and considering using a public variable, a string as a replacement to store logged in user id instead of in a session variable. I am pretty sure this will solve my issue with sessions being recycled but are there any negative consequences of doing this? One problem I can think of is if the user closes the browser, the system will never know that the user is now logged out and this public variable should be nothing. In this scenario, will the GC eventually clear this abandoned public variable.
I'm storing a token in a session variable. I launch a report that needs this token in a new ASPX page by using the javascript windows.open function. When this new page loads the HttpContext.Current.Session is null.I have gotten around this by passing the token in the query string but activity in this window needs to keep the session of the parent window active and I'm not sure what the session object being null means for this scenario.
View 3 Repliesi have 2 page,
1.login.aspx --- 2.welcome.aspx
in my login.aspx im storing username into sesssion as below:
Session["usernm"] = txtUsername.Text;
in my welcome.aspx page
in page_load event
if (Session["usernm"]==null)
{
Response.Redirect("Login.aspx");
}
here if i manulally paste the url ( http://localhost:4125/Loginado/welcome.aspx) it should go to login.aspx for user credentials
but its going directly to welcome.aspx page.
i have a gridview with link button and one field called "ID" i have five values....when i click the link button that row value ill show in next page in textboxes ,txtid, txtage, txtsalary,......... if i click that link button that "Id" values should pass to next page using "SESSION" variable in C#.net
View 1 Replies