I want to catch the session if is null how can I do this. My session is:
Session["kullanici_name"].ToString();
if it is null
Response.Redirect("kulanicigiris.aspx");
And I want to make a logout button. If he /she press the button session=null then page load and check if the session null going to home page.
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]....
Here is the code copied from [URL] In asp.net code behind, I use try-catch try to catch any error but never catch it. In SQL database, if I rename Employees to Employeesx or change column DepartmentID to DepartmentIDx, record will not be deleted (it is right) without any error (it is wrong, suppose catch an error).
CREATE PROCEDURE DeleteDepartment
(
@DepartmentID int
)
AS
BEGIN TRANSACTION
DELETE FROM Employees
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
DELETE FROM Departments
WHERE DepartmentID = @DepartmentID
IF @@ERROR <> 0
BEGIN
ROLLBACK
RAISERROR ('Error', 16, 1)
RETURN
END
OMMIT
I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
i am binding onject in fromview from other webserivice gatewayhow to i catch if the object is not set?
<%# (gw.gatewayobject)gw.gwObject %>
I need to create a small web application. The first thing I need to do is to develop the login, logout and user session management functionality. I wanted to use a masterpage and a usercontrol for this purpose. When a user open the page and IS LOGGED IN, the usercontrol should something like this:
"Hello Username! <a>Logout</a>"
And if he is NOT LOGGED IN, the Usercontrol should show something like this
"Login | Logout"
When he clicks on the Login Button the Login-page should be opened. How can I build a Usercontrol which does the above thing. (I have never build a usercontrol and used it in a masterpage before!) The second problem is a little bit komplexer: What happens if the user idles some times and after that time (for example 30minutes) comes back to his pc and wants to execute an action in the web application. Normally he should get an session timeout asp.net exception. I don't want that the user sees this asp.net errorpage, I want to redirect him to the Login Page and he should relogin and gets an error message shown something like "You were timed out. Please login again".
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?
So I've read quite a few posts about how to do this, and it's still getting me. I'm trying to control access to a directory, but I continue to get a null session error. I'm doing my check in PostAcquireRequestState
[Code]....no matter where I put this, my session always comes back null. I am using IRequireSessionState on the class as well. Am I pulling the context wrong?
I have a requirement where i need to download mutiple files as a single zip file.There is linkbutton named HOME as well in the page. when this linkbutton is clicked it should redirect to homepage.aspx. I found a ICSharpCode.SharpZipLib.dll in net and used in my website. Here is the code
[Code]....
With the above code i got the expected result i,e. i can zip the files and save on client system. But the problem is after saving/canceling the zip file if user clicks on linkbutton in the page_load event Session[getdata] became null. there is no data in Session. what might be the problem? Actually it should redirect to homepage.aspx but its going to login.aspx because Session[getdata] is null.
I am fairly new to the asp.net scene. Having build a dashboard gathering info on my OLAP system's health status, I can't seem to figure out how to make sure that I catch the no connection exception.use the following statements on the datagrid:a) want to change the color of ssas2 button to red if an exception is thrown
View 5 Replieshow come a Null session value that is called, doesn't get directed to the Custom Error Page?
View 4 RepliesIf i have a page in which I want to check whether session is null.
If it is null it will redirect to other page.
But i also have a  if (!Page.IsPostBack)
so i will check the session inside this  if (!Page.IsPostBack) or outside it?
I need to pass some values around using session state. My approach is to first check if my session variable is null and if it is not, then proceed with my C# logic. Is that correct? Will my Session variable ever contain garbage in it, like a corrupted string? Or will I be guaranteed that it is null if not explicitly set.
if(Session["MyVariable"]!=null {
// Do some logic }
I use the simple code in onunload's body method like this:
<body
onunload="closeIt()"> ... </body>
The closeIt method is call a server method, like this:
function closeIt ()
{
$.ajax({
type: "POST",
url: "mypage.aspx/myFunc",
data: '{}',
contentType: "application/json; charset=utf-8",
dataType: "json",
//async: false,
success: function(response){},
failure: function(response) {
alert(response.d);
}
});
}
I delete a folder in temp directory in myFunc method. The folder's name is the same of value in Session["id"], like this:
string id = Session["id"];
string temp = "~/temp" + id;
temp = Server.MapPath(temp);
DirectoryInfo dr = new DirectoryInfo(temp);
Directory.Delete(dr.FullName);
When the last code( Directory.Delete(dr.FullName) ) is run, the all session in project is changed to null. If i disable the last code( //Directory.Delete(dr.FullName) ) every thing work properly(all session have the value). Why when i enable the last code, all session are null? What's the problem and how can i solve it?
I get this error in the browser:
Code:
Thread was being aborted.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Threading.ThreadAbortException: Thread was being aborted.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ThreadAbortException: Thread was being aborted.]
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +486
System.Web.ApplicationStepManager.ResumeSteps(Exception error) +501
System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +123
System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +379
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053
I have try{}catch(Exception ex){} in the right place:
Code:
protected void Button1_Click(object sender, EventArgs e)
{
try
{
// all processing occurs inside here
}
catch(Exception ex)
{
}
}
I even created a global.asax file and on the Application_Error event, I wrote a code that would email me the error (and i'm not getting an email regarding that error when I get the error shown above). I know for a fact that the thread is going inside the "try" statement because I send emails to myself whenever it finishes certain codes inside of it. So how come I'm getting that error in my browser instead of it being handled in my "catch" statement? I have two problems here, one, why is the exception not going to my "catch" statement, and two, why am I getting that error in the first place.
Note: my web app calls a webservice.
In my ASP.NET 4.0 application, I've got an event handler for PreRequestHandlerExecute in global.asax.cs.
I want to access data in the Session. Most times, the session is defined, but sometimes it is null. when it is initialized and when it is not?
Its related to datatable in gridview store in session and then session retrive and store to database. basically i am using gridview here creating new row for button click and these row adding untill user's last entry then submit all these entry to database. so i want to use session variable to store this data temporarily and after final entry user click on submit button and all data shold be save in db.
View 9 RepliesUsing a class component, an Object data source and a formview I am successfully pulliing data from a SQL database. In some cases the rows contain one or more Null values and I would like them to be ignored completely. My simple code follows:-
<%# Eval("add_1") & ","%>
<%# Eval("Add_2") & ","%>
<%# Eval("Add_3") & ","%>
OUTPUT:-
Rose Cottage, 123 New Road, Margate,
I am getting HttpContext.Current.Session is null.Will this be a problem if we have application hosted in web farm.
View 1 RepliesIf I access session variable in ashx handler through it is always null. How can I access the current user here.
public void ProcessRequest (HttpContext context) {
context.Session[UIConstants.SessionItems.ID] = Id;
}
I apologize if this question has been asked prior, but I hunted around for about 3 hours today looking for some information. I have taken our existing application and converted it to use both Web Forms and MVC. This application uses multiple modulessuch as Products, Orders, Administration, etc... Each one of those is a web application and a hybrid that is copied into the main application at build time. We are using the Composite Web Application Block to handle our modules and IoC. I have created a Controller Factory that inherits the DefaultControllerFactory and overrides the GetControllerInstance method. However, I commented this out and it still gives the same problem. That problem being that when the controller is in an action, the Session is null. From what I understand, the Handler implements IRequiresSessionState, so the session should not be null. I have tried it out in a smaller, non-hybrid application and the Session is not null. Therefore, it is something that I am missing in the application that I have converted. If anyone has any information on what I might be doing wrong,
View 3 RepliesI've been using the session array to store a state variable for my webpart... so I have a property like this:
public INode RootNode
{
get
{
return this.Context.Session["RootNode"] as INode;
}
set
{
this.Context.Session["RootNode"] = value as object;
}
}
This usually works fine. I've discovered that sometimes, the context.session variable will be null.
I'd like to know what are the conditions that cause the session to be null in the first place, and whats the best way to persist my object when this happens? Can I just assign a new HttpSessionState object to the context, or does that screw things up?
Edit: Ok, so its not just the session that is null... the whole context is screwed up. When the webpart enters the init, the context is fine... but when it reaches the dropbox selectedindexchange postback event (the dropbox contains node id's to use to set the rootnode variable), the context contains mostly null properties.
also, it only seems to happen when certain id's are selected. This looks more like some kind of weird bug on my end than a problem with my understanding of the session.
If I create an ASP.NET Web Application project and then add an ASP.NET MVC 2 to it using the default routes defined like so
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { action = "Index", id = UrlParameter.Optional }
);
The Session object is NULL when I try and access it in the action methods of the controllers. If I change my routes to this.
routes.MapRoute(
"Default", // Route name
"{controller}.aspx/{action}/{id}", // URL with parameters
new { action = "Index", id = UrlParameter.Optional }
);
Everything works just fine. For whatever reason having the .aspx extension allows for session to be used, but the later doesn't. I'm using .NET 3.5 for everything.
I'm populating an object model with a linq query. The model looks like this:
MyModel{
DateTime AppointDate {get; set;}
int TotalAppoints {get; set;}
int AppointDuration {get; set;}
}
The linq-to-sql query looks like that:
public static GetAppointsFromDB(params){
var MyQuery = from....where...
select new MyModel{
AppointDate = ...,
TotalAppoints = ...,
AppointDuration =...};
return MyQuery as MyModel;}
In the master page, I'm looking to load the result of this query in the session like this:
if (Session["Appoints"] == null) {Session["Appoints"] = GetAppointsFromDB(...);}
When I run with the code, the session is always null. I added this line a second time, just right after, and the query runs again. When I'm looking to use the session at some other point in the code, it is null too there too. The query works because when I put a breakpoint on the return statement, I see the object properly filled.
I have an IHttpHandler that implements IRequiresSessionState. Everything works fine on most servers but there are 2 servers (one IIS 7.0 and one IIS 7.5) that give me null sessions. Aspx pages are fine on every server. I've searched for hours and failed to find anything that is not related to IRequiresSessionState.
View 1 Replies
