I have a textbox that invokes a function on text changed. When the function encounters exception, I want to throw the exception back to the caller. But the problem is the caller is from .aspx file, not .cs file. How can the caller handle the exception?
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I am converting the entered values in textbox into decimal values to saev in sql table. In case user does not enter any value i get a Format exception. How do i handle this..
My code is as below
DMLObj.Add("ItemID", Convert.ToInt32(drpitemname.SelectedValue).ToString());
DMLObj.Add("SupplierName", Convert.ToInt32(drpvendor.SelectedValue).ToString());
DMLObj.Add("Quantity", Convert.ToDecimal(txtqty.Text).ToString());//qty.ToString());
DMLObj.Add("Unit", Convert.ToInt32(drpunit.SelectedValue).ToString());
[Code] ....
how to handle the Exception
View 9 RepliesHow can I coerce an exception message that has bubbled from my business layer into an alert box in javascript?BTW, I'm using ASP.NET MVC 1.0.
View 1 RepliesI have a asp.net 2.0 application connecting to a SQL database. Sometimes while browsing through the application, we stumble across the OutOfMemory Exception. I am currently using VS 2005. What is the best way to tackle this exception. Maybe something like a memory profiler...or something like that.
View 4 RepliesI've written a custom FilterAttribute that implements IExceptionFilter. But this only catches exceptions in the controller actions. What is the best way to handle exceptions in views and html helper methods on a Windows 2008 64-bit Server running IIS 7
View 4 Repliesi got this exception when i done the code given below..
"Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack."
--code--
try
{
if (retVal == 0)
Response.Redirect("Success.aspx");
}
catch(Exception error)
{
Response.Redirect("errorpage.aspx");
}
finally{
}
from searching in net i found it to be a bug and if its success then we should end response... ie " Response.Redirect("Success.aspx", false); ".it works fine.. is this a good method or there is any other efficient method to handle this exception
I am using Session variable throughout in my application and my timeout is 1 hour. Here I need to catch the exception for session expires in any global way across my application.
View 3 RepliesFor example, I am using wenclient.DownloadfileAsync to download a file asynchronously.
In the DownloadFileCompleted event handler, I can check if I have any exception or not by using AsyncCompletedEventArgs.Error property.
If I re-throw this exception, however my executable is stopping running immediately.
I am wondering how to handle this kind of exeception? How to pass this exception back to the
calling thread?
i'm using asp.net 2.0 form with ajax. i have an ihhtpmodule which can thrown an exception at Application_EndRequest step. my problem is that if this happen in an async postback (i mean a postback of an update panel) i can't manage the exception (with manage i mean set a custom error message server-side) becouse it's too late for the error handler of the ScriptManager.
(the alert will print a message as:
Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near 'MyButt" />
|<html>
<head>)
at the moment my idea is to clear the response in the module and find a way to use the scriptmanager to send the correctly response of an error/exception. it's this possible? or samebody has another option of how to manage this case? note:i can't edit the aspx to manage this client client side with custom javascript
In my code i am running an exe file through a process call. How to handle exception generated by the exe file.
View 1 RepliesMy web application some times gives error 'The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE))' on server. I never comes on production server. Then I just upload the bin folder again on server and it starts running fine. I don't know what is the actual reason behind this.
Some experts suggested Min pool size =1, I applied that but no luck.
I have attached error image.
string connectionstring = WebConfigurationManager.ConnectionStrings["AdventureWorks"].ConnectionString;
SqlConnection con = new SqlConnection(connectionstring);
DataSet ds = new DataSet();
DataRelation dr = new DataRelation("show", ds.Tables["HumanResources.Employee"].Columns["EmployeeID"], ds.Tables["HumanResources.EmployeeAddress"].Columns["EmployeeID"],false);
ds.Relations.Add(dr);
foreach (DataRow row1 in ds.Tables["HumanResources.Employee"].Rows)
{
Response.Write("customertitle:" + row1["Title"].ToString());
foreach (DataRow row2 in row1.GetChildRows(dr))
{
Response.Write("customer add" + row2["ModifiedDate"].ToString());
}
}
Object reference not set to an instance of an object. 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.NullReferenceException: Object reference not set to an instance of an object. Source Error:
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Line 31: Line 32: DataSet ds = new DataSet();Line 33: DataRelation dr = new DataRelation("show", ds.Tables["HumanResources.Employee"].Columns["EmployeeID"], ds.Tables["HumanResources.EmployeeAddress"].Columns["EmployeeID"],false);Line 34: //ds.Tables["HumanResources.Employee"].ParentRelations.Add(dr);Line 35: ds.Relations.Add(dr);
Source File: d:databaseDataset showing selected
field of 2 tables.aspx.cs Line: 33
Stack Trace:
[Code]....
[NullReferenceException: Object reference not set to an instance of an object.] dataset__with_two_tables.Page_Load(Object sender, EventArgs e) in d:databaseDataset showing selected field of 2 tables.aspx.cs:33 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +33 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +47 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1436
I want handle exceptions in update panel control with c#.
View 1 RepliesI'm calling an asp.net webservice from a VB.Net application.Is there any way to determine in the webservice that it was called from a specific application. I had a look at Me.Context.Request but I can't see anything that refers to my VB app.
View 1 RepliesIs there a way to know an URL that calling the web service?
View 4 RepliesI have a modal popup built in jquery. I have an apx which has several ascx controls. Each of the ascx control has a button calling the modalpopup. I need to know the id of the calling control so I can handle it differently.
View 2 RepliesI need to make an autoupdater for my application. This has been done, and it is working perfectly. However, my application currently downloads version.txt, and reads it to work out whether it needs to download the new application. This is hideous, and slow, and was only supposed to be very temporary. It is also very annoying that we have to update this file every time we release a new version.
My boss wants me to create a webpage that reads the version data from the uploaded .exe, and then returns that to the Desktop application. Therefore, I would be able to call www.example.com/version.aspx, and it would return the version number, such as 1.1. I could then compare to the current version (don't worry, it is generated on the fly, and not hard coded) and then I could download the application if required.
Here comes my question. How would I go about this? I have heard of CGI scripts, and asp.net. Which one of these has the power to solve my problem. If you could just tell me that, then I will be all sorted, as I could read up on it, learn, and broaden my knowledge.
If this is not possible, or not easily possible, is there any way of reading the file version of a remote .exe, without downloading it. This would also be preferable in many ways.
P.S. I did try to explain this to my boss, and suggested that maybe he could either do it, but he is not very good at web applications, and refused, saying that it would broaden my education in this matter.
EDIT: Somehow forgot to add: I normally program in C#, although this application should be so small, that it would not really matter. Also, C# code would be ideal, if there is a way to check the version of a file on a remote server.
Is it possible to retrieve the URL of a 3rd party webservice calling my controller method?
Things like Request.Current.Url refer to my own URL (/someController/someAction/).
The 3rd party webservice is sending HTTP POST data to my /someController/someAction and I wish to send back a HTTP POST message to the caller of the method, the 3rd party webservice, without using
return Content["some response"] which will force me to exit the method. Since the answer is plain text I would like to send it using HTTP Post.
What I actually try to do is respond to the calling webservice without exiting my method (return Content() will exit) so I can call other methods to process the data send to me by the webservice. I want to first tell the webservice I received their stuff and than process, in this way when a processing error occurs the webservice at least will not resend old data. Is there another way to do this than building your own HTTP post?
I am having a simple WCF service hosted in my website. I am using a console client to send and receive messages from the service. It works fine when I run the WCF web host in my local computer, but fails badly with the SecurityNegotiation exception "The caller was not authenticated by the service". It works fine if I use basicHttpBinding, but fails for wsDualHttpBinding which is required for duplex communication.All the source code for both (console) client & (web) server can be downloaded at:http://www.supernovaservices.com/downloads/WfcEventService.zipI have searched a lot and could not get a proper answer
View 2 Repliesi need to restore Database.mdf; I create a blank new database exactly the same name as the .mdf file. However, I could not restore the database.
The error message prompted was:
TITLE: Microsoft SQL Server Management Studio Express
An exception occurred while executing a Transact-SQL statement or batch.
(Microsoft.SqlServer.Express.ConnectionInfo)
ADDITIONAL INFORMATION:
Cannot open backup device 'C:inetpubwwwrootTCPSystemApp_DataDatabase.mdf'. Operating system error 32(error not found).
RESTORE HEADERONLY is terminating abnormally. (Microsoft SQL Server, Error: 3201)
click: [URL]
BUTTONS:
OK
I 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.
In ASP.NET,How can i know the Specific details about an exception (like What kind of Exception it is (FileNotFound /Arithmentc etc..) )from a General Exception class object.
View 2 Repliesi have this application structure:
1. Presentation Layer which calls
2. Business Logic Layer which in turn calls
3. Data Access Layer to do the dealing with the database.
Now i have a Contacts page from where i can add a new contact to the database.So to add a New Contact i fill in all the required details and then call a Add Method (residing in the BLL) from the page, which in turn call a Add Method residing in the DAL.this method in the DAL returns the Current Identity of the record which is then return back to the BLL method and finally delivered on the page.this is fine. but what if a get an exception how do i handle it properly because the method in DAL has a return type of int and i dont want to throw another error!! coz other wise i will have to write try catch in almost all the methods.
//something like this
public int AddMethod(ContactClass contactObj)
{
int result = 0;[code]...
rather i want to show the user a user-friendly message which they can easily understand and in the mean while i will send a mail to myself documenting the Error that just occurred.how can i implement my custom exception classes.
Is there any way to uniquely identify a particular exception from the general exception class.
i.e any property or method that retrieves a unique identifier that to identify a particular exception.
I have kept some error values and corresponding error texts in an xml file. I want to read that xml file and have to taken the error ids and fix the corresponding texts to a label. in the case of a system exception we have to identify a particular exception.
