Capturing Session Variables Inside Jquery Code?
Nov 30, 2010
I use asp.net (webforms flavour) for the server coding. Let's say that I stored a variable called "test" inside the Session object.Is there a way to grab its content inside the javascript js file (I use Jquery). Currently, I use the following workaround - in my aspx.cs file I populate a hidden field, then in Jquery I grab the contents of that field.What is the proper way to do that?I tried to expose the session through a web method and using $ajax function to get the value on the Jquery side, but I am getting security error - "permission denied" - no additional explanation offered.My workaround works fine, but to me it seems rather clunky. What are the common ways to achieve session access in Jquery?
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Oct 26, 2010
I am having with asp.net app inside of SharePoint (as page viewer).
When the Default page is loaded, it works fine. However, when I try to go to next page, i am getting a null reference exception. It looks like my session variables are becoming null on the next page (even though I set them on the previous page). Here are a couple things that I tried to diagnose the problem.
I try on the couple other computers; some work fine, some still don'ts. In the property of the page viewer inside of the SharePoint, after I click on the "Test link", it started to work fine until the session expired (on the computer didn't work initially).
I am not sure if there are settings that I need to check on the browser or the app server.
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May 12, 2010
I'm trying to set session variables in one page, and retrieve them in my code file in the page that it posts to.
I keep getting this error. I put the correct namespaces in, and enabledSessionState = true to my application files, but no luck.
Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration><system.web><httpModules> section in the application configuration.
I'm just calling a session variable, and I get that error
e.g,
Public AUID As Integer = Convert.ToInt16(Session("AUID"))
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Aug 8, 2010
i am trying to collect 2 variables from one hyperlink, and use those variables in the page_load to set as session. but i don't know how to collect those 2 variables
such :
<a href="javascript:;" onclick="wsChangeColor('mainData', '#FF0000','#FFE4E1');return false;" title="Change color" id="red">1</a>
i would like to collect '#FF0000','#FFE4E1' or direct set '#FF0000','#FFE4E1' to string then send to pageload, how can i do this by only clicking on it ?
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Nov 18, 2010
I am using a EntityDataModel. I have one table that has fields id, first, last
I have a stored procedure for inserting that is mapped to this table in the entydatamodel.
[Code]....
If I execute this in the Code Editor the Output window would look like this
[Code]....
Here is the sample code for a button click event on a simple page that only has a button. This is a bit of bad example because I am actually setting the field id. But assuming that it was an Identity field that was incrementing itself by 1....what would be the code after SaveChanges() that would capture the reutrn value from expId in the stored procedure.
[Code]....
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Jul 2, 2010
I have two GridViews that list out included and exclude data items respectively. By clicking "Change Status" (a custom button for each row) Users can change the row status from included to excluded or vice versa. However before changing the status - users would need to specify the reason and enter a date for when they want something included/excluded. So these are additional operations that need to take place after the "Change Status" button is clicked and before an update occurs. I want to use jQuery to capture the row id being "changed", save this value and pass back the update to the database. I will use an absolute div for the menu but I'm running into issues as to how to capture row id and how to pass this back to my C# in codebehind.
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Oct 29, 2010
My Problam is on Capturing Text Box and Dropdown seleted itam from grid view i create a gridview with Empty DB binding using [URL] this senirio. I only used setinitional value() function and called its in page load as discribed in above lonk. insted of adding New record Button i callled a java scrit code discribed below. and i also create a button (SAVE) to capture a value intered in text box . On this button click event i try to capture a textbox and dropdown value like
for (int i = 0; i < Gridview1.Rows.Count; i++)
{
DropDownList sen_to1 = (DropDownList)Gridview1.Rows[i].Cells[1].FindControl("DD_sento_org");
TextBox Add_to1 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("Txt_addto");
int Add_to = Convert.ToInt32(sen_to1.SelectedValue);
String Addd_to = Add_to1.Text;
}
but its not working i can not go inside loop.
<script
type='text/javascript'
language='javascript'>
function AddNewRecord(keyCode, obj)
{
if (window.event.keyCode==13 )var grd = document.getElementById('Gridview1');
var tbod=grd.rows[0].parentNode;
var newRow=grd.rows[grd.rows.length - 1].cloneNode(true);
cleanUpInputs(newRow);
tbod.appendChild(newRow);
}
}
return
false ;
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Oct 11, 2010
I use some session variables to get the job done(shopping cart, etc) but it is not stable..manytimes I get no items in session object and other times(refreshing the page) I get missing data...I downloaded the entire site code to my local pc and debugged it and run it succesfully without any session data missing...When I run it in the server, I get bad session again: no products in shopping cart or products with missing quantities...
The same website runs smoothly in our production server too....The problem is with our development server...
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Nov 11, 2010
I have some code in my page load event where I just want to fire once when the user opens the Browser. The only issue is if you open a new tab with the same website the session variable does not reset. Is there a way to reset the session variable when you open a new tab or do you have to take the whole web browser down for it to clear the session variable.
In Global Page:
[code]....
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Apr 23, 2010
I've got a button inside the gridview that isn't firing the onCommand, ONLY when I uncomment some seemingly unrelated code having to do with session in the page load.
Markup:
[Code]....
Code Behind:
[Code]....
Now here is the odd thing. If I comment out the If Not Session block in the page_load....it works and deleteUser will fire upon a button click. If I leave it uncommented as now.....it won't work.
The weird part is when I step through the code in debug, upon clicking the remove button, it still registers that as being clicked and runs page_load, etc again. But won't run deleteUser.
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Feb 9, 2010
My pages base on master and content pages and in content pages I have Multiviews; inside Multiviews I have RadComboBoxes.Two of my RadComboBoxes are parent and child, like country and city dropdowns. Therefore in code-behind I put some code in the OnSelectedIndexChange event of parent RadComboBox for filling its child; I use a hidden field for country id and sql datasources (stored procedures). Meantime parent and child combo boxes are in an update panel.For doing this job i set the autopostback property of parent combobox to true,but I do not want that autopostback=true because of some focus problems that I coded with jQuery.So I want to convert the OnSelectedIndexChange event in code-behind to a method and call it in jQuery (in change event or something like that of parent combobox). How can I do this?
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Nov 12, 2010
There are reams of info out there about things causing InProc session to drop session objects, but that's not what's happening here. We're missing individual variables within stable InProc session objects, and are not sure whether they're not being written or being lost after a successful write. I've confirmed with WinDBG that the sessions are live and contain some, but not all, of the data written to them.
Guid g = System.Guid.NewGuid();
this.Context.Session.Add(g.ToString(), result.ImageData);
output.Write("<img src="display.aspx?id=" + g.ToString() + "">");
This code is pretty straightforward, and it works flawlessly in Test. In Production, under heavy load, though, it fails ~1% of the time. If Mr Smith visits the site and attempts to display 4 pieces of image data, 2 of them might be saved in his session and two of them be lost. The InProc session object for Mr. Smith exists. The traffic logs show he clicked 4 times, each with a different id param. But there are only 2 guids in his InProc session object, instead of 4. The 2 session objects we did capture do correspond to 2 of the id's shown in the traffic log (his 1st and 3rd clicks.) The traffic logs for his 2nd and 4th clicks, though, show a guid id that's not in his InProc session object.
Lines 1&3 of the above code obviously worked for those 2nd and 4th clicks, or he'd not have had the id in the URI for him to click. Line 2, however seems to have failed silently in some way. If any exception had been thrown, I'd expect we'd not ever have arrived at line 3. I can't see any way for the user to receive the guid id, but the session to fail to have it. The other possibility is line 2 worked successfully, but the variable later disappeared, how I cannot even imagine.
Details:
ASP.NET v3.5
IIS 6
No Web Gardening
We're running a web farm, but users constantly return to the same server. I'm researching now whether there's any way users might be slipping off to the other server.
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Mar 31, 2011
I have a piece of code written in 2 different ways, one a web service and another a WCF client which are trying to access an external 3rd party URL.
The same code when written as an exe works fine, i see my submissions on the 3rd party site, while the web code does not work.
I installed Fiddler to check traffic and to my surprise the web code works when Fiddler is capturing traffic, As soon as I stop Fiddler my code does not work.
For the web service code I get error: The remote name could not be resolved:
For the WCF client I get error: There was no endpoint listening at <<3rd party URL>> that could accept the message. This is often caused by an incorrect address or SOAP action.
Am quite sure now that this is because of some network and/or proxy on my corporate network, but not able to figure out what it can be.
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Aug 7, 2010
Let's say I have some HTML and Javascript which adds text fields dynamically to a form:
[code]...
What might the ASP.NET code for capturing the data from these dynamically created text boxes look like?
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Nov 6, 2010
I have a default.aspx page with an iFrame that displays another "main.aspx" page.
The main.aspx page has some buttons and other controls .. and some events associated to page load and so on .. When i open main.aspx in a browser, evrthg works perfect .. but when i open up defaults.aspx , evrthg loads correctly, but if i click on any button inside "main.aspx" , nthg happens .. and none of the events is triggered ..
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Dec 24, 2010
Where exactly are session variables saved? Cookies? Server memory? Again where are Application variables saved?
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Mar 22, 2010
I need to clear all sessions at the end of my application, to many to list individually.
So I have found the following ways, but which is best?
Session.Clear();
Session.Abandon();
Session.RemoveAll();
And then the specific way
Session.Remove("variable");
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Jan 27, 2010
Am trying to design login page for my website and I am looking for methods other than forms authentication. The way in which I am trying is to have a table in the database that stores user information and check for the user validity.
The point where I get struck is how do i set cookies and session variables and how will I carry it through out the system. Can anyone tell/suggest me where I can relevant material so as to move forward. And also is my idea of negating traditional forms authentication and going for a model I described, is it good also does any other better method exist?
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Jul 30, 2010
I want to password protect an area of a website by a login/registration form.
I'm using session variables to check wheter the user is logged in or not. I already have a database with users/passwords... so I thought that the membership approach wasn't an option... (correct me if I'm wrong)
in the constructor of the controller of the area I want to protect I've added the following:
[Code]....
but this throws an error:
Server Error in '/' Application.
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace or more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
Line 28: this.productsRepository = productsRepository;Line 29: Line 30: if (Session["user"] == null)Line 31: RedirectToAction("List", "Products");Line 32: }
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Nov 10, 2010
I am working on an asp.net mvc app.Right now I am looking for the best solution to access session variables.
Is it oke to make a static class to get session variables, like:
[Code]....
And so on for other session variables.Is it allowed to access session variables in static model classes ?
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Mar 25, 2010
In my .NET web app, I keep basic user info in a user session object. I also usually keep a director class in the session; which is basically just has info about whatever thing it being worked on on that screen (like a customer id).
I am trying to keep from adding a ton of sessions. I also want to make sure at any given time ONLY the sessions that are necessary are in memory.
This means I need an effective way of managing my session variables.
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Mar 28, 2011
I am using ASP.NET 2.0 and C#. I would like to know if the Session variables are Case-sensitive.
Is Session["StudentId"] and Session["StudentID"] considered the same.
Which would be the proper way to access the session details, when in a page someone passes data as Session["StudentId"] and somebody else passes as Session["StudentID"]?
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Jun 10, 2010
I have a situation where my session variables seem to get corrupted. I Page_Load I am calling 2 subs. Each of them fills a GridView with data from a table. I am saving the content of each Data.DataTable into Session Variables:
Get_Summary_Last_Completed_Shift()
code in sub:
mySqlDataAdapter.Fill(mySqlDataTable)
Session("mySqlDataTable1") = mySqlDataTable
GridView1.DataSource = mySqlDataTable
GridView1.DataBind()
Code:
Get_Petroleum_Disbursement()
code in sub:
mySqlDataAdapter.Fill(mySqlDataTable)
Session("mySqlDataTable5") = mySqlDataTable
GridView5.DataSource = mySqlDataTable
GridView5.DataBind()
After I call the 1st sub and I debug the session variable "mySqlDataTable1" contains all the data from the table. After I call the 2nd sub and I debug the session variable "mySqlDataTable1" has been changed and contains a mix of data from the 2 tables.
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Oct 15, 2010
I'm trying to pass some variables from one page to another via the session state and then post those variables to labels on page 2. When I try to write the code for my labels on page2, I get an error of "Declaration expected"Here is my code from that page:
Partial Class Default2
Inherits System.Web.UI.Page
Dim firstname As String = CType(Session.Item("FirstName"), String)
[code]...
Am I missing a page_load event handler or what am I missing?
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May 5, 2010
I am doing web based projects in dotnet. Currently I am implementing security using session variables. I keep current user id and user type in session and authenticate user from these session variables (say Session["UserId"],Session["UserName"] and Session["UserType"]).
I've heard that such security can be broken and applications can be hacked very easily, like it is possible to get session id and directly connect to that session id etc.
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