I have an ASPX page where I want to show an error id when an unhandled error occurs. So I throw an Exception with an error id. However all the user sees is an "Internal Server Error 500" from IIS/ASP-NET Dev. How can I control this? I want the user to either see my Exception.
View 5 RepliesI am working on a 3-tier asp.net application. Currently I'm stuck up in a situation where I need to handle a specific type of exception (User Defined) in DAL and Show alert to the user if that exception occurs in DAL.
I tried following things:
1) I raised that exception from the DAL and catch it in BLL and throw a new BLL exception to for that DAL exception and finally catch it in the UI layer to show the alert to the user. I've successfully implement this in my project. But there are some issues in this approach. First of all I feel this is not right way to do this as it may lead to performance related issues. Secondly, the application contains more than 500 pages and classes. so I need to attach additional catch block in every method to catch the BLL exception. which is the last option i'd like to take.
2) in second approach I logged the the DAL exception into a text file. but problem in this approach is that how could the UI layer know that exception has occurred and show the alert to the user. Is there any event in asp.net where i could handle all this activities?
my question is what is the best approach to handle this type of situation? Will Exception handling block help me in this?
I've tried reading many articles on this but i couldn't get an answer for my question? I might not be using right keywords for my search.
How to identify the line nr. where the exception has occured and show a piece of code around the exception?I would like to implement a custom exception handler page which would display the stack trace, and I'm looking for the easiest way to accomplish the above. While most of the information is available through the Exception object, the source code information is not available there.
View 1 Replieshave the code...try
{
do something..
}
catch(Exception ex)
{
Response.Write("<script>alert('"+ex+"')</script>");
}
but the alert box is not displaying...if i use the code.
try{do some thing}
catch (Exception ex)
{
Response.Write("<script>alert("an error occur")</script>");
}
alert box appears....how could i can display the exception variable in alert box
I'm working on having two forms that communicate together. In order to do this, I am passing public value from the source page. Here's how I did it:
In the source page I have:
Public ReadOnly Property CurrentCity() As String
Get
Return txtboxfake.Text
End Get
End Property
Then under page_load of the page I have:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
txtteam.Text = PreviousPage.CurrentCity
txtboxdate.Text = Calendar1.SelectedDate
End Sub
For some reason I keep getting an error that says "NullReference exception unhandled by user code" that points to txtteam.text = PreviousPage.CurrentCity.
how can i show the full blown .net exception that may occur on an ajax enabled page. i want it to show like it would if the page wasnt using ajax. This for my QA environment for which i dont have the option to temporarily disable update panel. Also i dont want javascript to handle it as our QA testers are wanting to see the usual full blown asp.net exception.
View 1 RepliesI am stuck into a problem, i have a user control ProductListing.ascx that contains ListView binded to an object datasource, SelectMethod and SelectCountmethod are provided as well. Everything works fine but the problem started when i add another user control declarativlly Filter.ascx in the productListing.ascx. I want to assign value to a public property MaxPrice in Filter.ascx. I am trying to set this property in the SelectMethod of ObjectDataSource. Usercontrol "Filter.ascx" throws null reference exception when i try to set its MaxPrice Property.
I tried to acced the usercontrol in Databind method of ListView , it is accessible here but viewstate is empty at this point, i saved the value in viewstate in SelectMethod of objectDatasource but i cant access viewstate in ListView Databind. Its empty. Its a simple code and no rewriting to viewstate elsewhere.
Important: My Codebehind files are in a seperate project and .ascx files in seperate project
how can we show error in our application when exception occur in webs service
View 10 RepliesNull Reference Exception was not handled by user Object Reference not set to instance of an object
View 2 RepliesI'm trying to throw the exception back to Page_Load but the throw statement causes error: ArgumentNullException was unhandled by user code. How can that be fixed? Also, I can't see Label1.Text displayed on the page after the ArgumentNullException occurs because the page is not re-load. If there is no exception, it's fine to not reload the page. How can I see the Label1.Text displayed?
protected void Page_Load(object sender, EventArgs e)
{
try
{
...do something here...
}
catch (ArgumentNullException ae)
{
System.Diagnostics.Debug.Write(ae.Message);
Label1.Text = ae.Message;
Label1.Style.Add("visibility", "visible");
}
catch (Exception ex)
{
...do something here...
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)............................
I want to show user already exist erroe in user create wizard but user create wizard is disaply in pop up so after click create user button ot shows error user already exist and pop got closed how i can show error on popup or how can skip postback so clicking on button it will not close popup???
View 6 RepliesI am involved in designing a asp.net webforms application using .NET 3.5. I have a requirement where we need to log exceptions.
What is the best approach for exception handling, given that there would be concurrent users for this application?
Is there a need or possibility to log in exceptions at a user level? My support team in-charge wants to have a feature where the support team can get user specific log files.
To give you a background, this application is currently on VB 6.0 and we are migrating it along with some enhancements. So, today the support personnel have a provision to get user specific log files.
In my ASP.NET MVC application, I do not want to report all exception messages to the user. But there are certain types of exceptions that I'd like to report to the user, so I created an action filter to decide if it's this particular type of exception, and if so then display the exception's message, otherwise display a generic message. So I created a custom exception called ClientException.
My filter looks something like this:
if (filterContext.Exception is ClientException)
message = filterContext.Exception.Message.Replace("
", " ").Replace("
", " ");
else
message = "An error occured while attemting to perform the last action. Sorry for the inconvenience.";
filterContext.HttpContext.Response.Status = "500 " + message;
I read this http://blogs.msdn.com/b/kcwalina/archive/2007/01/30/exceptionhierarchies.aspx where the author recommends using existing .NET exception types to report usage errors. However, by introducing my custom exception, I just have to do a single check in my filter.
If a logged in user is inactive on the page for more than 20 minutes and thenclicks a button to cause post back they get the error below.Server Error in '/' Application.Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.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.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster
View 5 RepliesI have LOGIN PANEL for student, and I want to disable it in different page. And only the admin can enable and disable it. I dont know the logic behind here.
View 1 RepliesI need to develop a web applicaiton which will have a user tree like shown in the picture.Generate Labels dynamically with different "CSSCLASS" and design it like that.
Admin,
Coordinator,
TeamLeaders,
Endusers...
How to give such a UI to the user.... There no options required, but it want to show as group and team level.
I am part of a team that is developing a SharePoint web part. My task is to create a user control which will ultimately be wrapped in another class for presentation in a web part. Because of these requirements, I must fit all of my code in a single user control.To organize my code in the code-behind, I created a few private classes for the different objects which are represented in the database. I want to add some exception handling whereby if some sort of DB exception is thrown I can update a message on the page informing the user of the problem.
My problem is that the page-level controls are inaccessible from the private class where I'm issuing the query, so even if I catch the exception I have no way of directly accessing a Label control to populate the error. I tried to create a baseclass with an EventHandler defined, but when I throw events from the private class I'm not able to catch them for whatever reason. I'm far from an OOP expert Here is a snippet:
ASP Code:
using System;
using System.Collections;
[code]....
I' m using a web custom control to upload images and mark them as primary. all the flow is working fine but it fails to mark images as primary in a diffrent category(there are four categories in which we can load a image-,catalog,primary,misc).It works in - category but not in others when I debug it is failing at a condition in grey . If it is not an element of the Datalist item it would not even enter the loop. I' m lost and unable to find the reason.
View 2 RepliesI developed a asp.net application in vs2008. It is working fine Locally. When I deployed it to the IIS am getting the System.data.sql exception Login Failed for user 'DomainMechine Name'rror.hen I add <identity impersonate ="true" /> then It is working on the server (locally) but not workingWhen I try to acces the page thru link.I already added NT AUTHORITYNETWORK SERVICE permission to the database. understand why am I getting this issue and How can I resolve this Issue? Note: I have authorization enabled in my web.config. I am allowing only certain people to access this site. I have full rights.
View 2 RepliesI'm making a forum.
I need to show if a user is Offline or Online.
Like this:
Where is says Online i need it to say Offline when the user if offline.
Okay, now i think i got explained what i would like to do.
How i would like this to work:
When a user logs in i want his status to change to Online.When the user press Log Out i want the status to go Offline.
When the user haven't been active for 10 minutes i want the status to change to Offline, but he is still logged in.If he clicks on something he's active again, so i want the status to go to Online again.If the user browse away from the site or close the browser/site i want it to go to Offline status again.
I'm trying to use the following code to show a panel if the user belongs to a group:
protected void Page_Load(object sender, EventArgs e)
{
panEditor.Visible = (this.User.IsInRole("Administrators") || this.User.IsInRole("Editor"));
}
}
This is not working. It errors with "...does not contain a definition for 'User'...
Using vb.net/asp.net 2005 and SQL Server 2005:I have a unique constraint setup to prevent users from entering duplicate email addresses in my online system.When a user tries to edit an existing email to one that already exists (add a duplicate) it shows the following<ERROR>Cannot insert duplicate key row in ojbect "dbo.someTableName" with unique index.....The statement has been terminated This prevents the user from adding duplicates which is good but I would like to provide a more user friendly exception message and I do not want to show the table and field names to the user.
View 4 RepliesYou can for example enter the length and width of the web (VS.NET2005), when it runs out of range index error exception was unhandled by user code for chieudai
Code:
public class Tinh
{
private Int32 _quanhuyen;
private String _diachiNha;
private Double _chieudai;
private Double _chieurong;
private Double _dientichDat;
}
[Code] ....
if any one login how to get user name and show in our web page
and how to get location of client side (Physically Ex-India -Delhi-Anand Vihar)
I am have done a basic asp.net application User Module with out using any authentication classes.
Now I need to store last user login details in my asp page when user performs any operation. and need to show to other User who next login that ( the last user has made changes before ).