Windows - Find Out Where In User Code An Internal .Net Exception Originated?
Feb 27, 2010
I am currently working on an existing Windows Forms application (VB.net), and am busy reworking the exception handling mechanism.Currently, a lot of methods in the code are just surrounded with try/catch block that catches a generic exception and then calls a utility method that just shows the user a messagebox informing him of the error, and then logging it.So in a lot of cases no corrective action is taken and the exception is just logged. I know this probably isn't the best way but that's they way we're gonna have to do it for the near future.Anyway, I wanted to do this in a more generic way, so I hooked up Application.ThreadException and AppDomain.UnhandledException.
This seems to work well, except for one inconvenience. Whenever an error gets thrown from the .net runtime itself, or a 3rd party control, the stacktrace begins there where the exception is thrown in the framework-methods or 3rd party methods (obviously!)But it would be handier if I had an easy way of finding out exactly where these exceptions cross the boundary into my code. I would like an easy way of determining (in Application.ThreadException) where in my own code an exception originated. am aware this information is contained in the Exception.StackTrace property, but I would like an easy way to get to this specific information seeing as the stacktrace property is one huge string.
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Sep 10, 2010
In my project, I have a local dataset (XSD) that I am using as local-temporary tables. I am getting a System.InvalidCastException when trying to access the field in one the tables. I believe this is because I my code is (incorrectly) not setting a field's value in a row before trying to access it.My problem is that the exception is breaking in the designer file and not in my code. As a result, I'm having difficulting determining which line of my code reading the field value before it has been set. Is there any way to configure Visual Studio to break in my code instead of in the designer created file?
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Feb 19, 2010
i develop the following code in vs2005, now i just using this module in my new project @ vs 2008..But this error was araised. I cant able to fix this problem...
Private Sub DataAccess()
Dim errHandle As New ErrorHandler
Dim lobjCommon As New eCopsCommonFunctions
[code].....
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Aug 25, 2010
On a recent project I stumbled across a page of code that looked unfamiliar, but which evidently was the code behind my form design. I'll copy and paste an excerpt to show you what I mean:
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
[code]....
I thought this was a useful way to back up my project via email because it's in text form. But now I can't find the same information. I've looked in the Object Browser but couldn't find it anywhere. I think I stumbled on it the first time by right clicking Go to definition, but now that doesn't take me anywhere if I click on say form1. So where will I find this mysterious page that has all the form items information in text, not graphic form? Can't find it anywhere.
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Apr 28, 2012
I have this code to show a user their internal IP address. How can I get their external one?
vb.net Dim h As System.Net.IPHostEntry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName)
MsgBox(h.AddressList.GetValue(0).ToString)
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Jul 28, 2011
I have the following code :
Imports System.Data.OleDb
Private Sub getData()
Dim connStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:
[Code].....
Exception Text : Can-not find installable ISAM.
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Mar 8, 2010
I've made a user control and have added some internal labels inside it. In the User control class I'm trying to handle the mouse events so that: When the mouse enters the User-Control the background of the User-Control turns white - using MouseEnter event. When the mouse leaves the User-Control the background of the User-Control turns grey - using MouseLeave event. However as soon as I move the mouse over the internal labels it triggers the MouseLeave event. I don't want it to do that, because the mouse hasn't left the bounds of the User-Control! So, how do I get it to not trigger the MouseLeave event when the mouse is still internal to the User-Control?
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Nov 10, 2009
In my project, a reference xxx.dll is added. I am going to step into the code inside xxx.dll, therefore I add the project into the existing solution.So far so good for the vb.net xxx.dll file.Suppose another COM Interop.yyy.dll will be added, is there anyway to step into the yyy.dlll internal code?
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May 3, 2009
Is it possible to have an internal XML dataset within a VB 08 program I ask because we at present have the program load an external XML on startup, but i would prefer this to be internal withing the program to stop other editing the XML file.
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Sep 28, 2009
I've seen a few people on here saying that you shouldnt use GoTo in VB.NET and to be honest I've tended to agree as I have never needed to use it and there is always another way of doing something without using it. However, I'm just wondering what is so bad about it? I actually noticed that Microsoft seem to use it a fair bit in the internal .NET framework code, which is what makes me wonder why people are so against it.
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Aug 15, 2011
So heres the deal i am still learning VB (bet you guessed that), now what i am tryiing to do is create a form with a number of text boxes (say 25) where a user can enter their own data. Which they can then save as a file and reload. Now when they reload the file the data needs to be put back in the text boxes where it originated
Which would be the most efficient way to write this?, would i write it ti a csv file or a database or text file, as you can tell i'm a little confused on what areas i need to research.
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Mar 30, 2009
I am trying to figure out how to generate code from user input. In Visual Studio 2008, Visual Basic.My script always begins with:function Init (Quest)Then from here a user would input a quest name, type and zone in a interface using windows forms.[code]I would also like to have these available on the UI but wont generate unless a user checks a box to add them or there is a box already for them but wont step into the code unless the user enters something into the box.Is there anyone that can explain how I would go about doing this. Or maybe some kind of visual studio plugin that will help me out.
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Mar 30, 2009
How to generate code from user input. In Visual Studio 2008, Visual Basic. My script always begins with:
Code:
function Init(Quest)
Then from here a user would input a quest name, type and zone in a interface using windows forms.
Ex:
Code:
RegisterQuest(Quest, "Kill Zombies", "Heritage", "Firestorm")
end
This part a user would enter in his interface what would an NPC say if accepted.
[Code] .....
What I need is a few text boxs that a user can input "Kill Zombies" or whatever they like and when they push a generate button it will create a file with a .quest extension. All of the code remains the same except for the quotes that would be the user input from the interface. Basically everything in quotes can be changed by the user in an interface. I have created my own functions for when a user accepts, deny and complete a quest. The user just needs to input what should happen then click a generate button to throw it all together as a .quest file to be saved in his or her quest folder for the server to call on later.
I also have many other functions like:
AddQuestRewardFaction --- (Quest, Faction ID, Amount)
AddQuestRewardCoin --- (Quest, Copper, Silver, Gold, Plat)
AddQuestStepObtainItem --- (Quest, Step ID, Description, Quantity, Percentage, TaskGroupText, Item ID(s))
Etc
I would also like to have these available on the UI but wont generate unless a user checks a box to add them or there is a box already for them but wont step into the code unless the user enters something into the box.
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May 23, 2011
How can I raise an event from another class which implements an interface that contains an event?
Public Interface IMyEvent
Event MyEvent()
End Interface
[Code].....
Note the comment - that code doesn't work. How can I raise an event like this, if it's contained within another class through an interface?
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Apr 5, 2012
Background : I have built a VB .NET application on the 4.0 Framework, part of the primary functionality is the built in AxWMPLib.AxWindowsMediaPlayer which allows us to pass a file path as a URL to the player and then play it through the built in media player. My Development Platform is VS 2010 Pro on Windows 7.
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Aug 7, 2009
in vb.net i am trying to save application settings but for USER but i cannot find the user.config file
when does this file get created?
i searched my entire hardrive. i also searched the entire project.
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Aug 24, 2010
I am having problem with executing a program that uses a cmd command to run through the Visual Basic .Net. The code is as following
Dim myThemeProcess As New Process
Dim myTheme As New ProcessStartInfo
myTheme.FileName = "%SystemRoot%system32
[Code]....
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Apr 23, 2012
I get this exception "could not find installable isam" when trying to read from an excel file in vb. I tried google and the most I get refers to a problem with my connection but I don't know how to fix that. Here is my connection string
Dim MyConnection As System.Data.OleDb.OleDbConnection
MyConnection = New System.Data.OleDb.OleDbConnection _
("Provider=Microsoft.Jet.Oledb.4.0; Data Source='" & Application.StartupPath & "kk.xls'; Extended Properties=Excel 9.0;")
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Apr 15, 2011
Dim con As New OleDb.OleDbConnection
Sub connecttodatabase(ByVal fileselected As String)
Dim databasepassword
[code].....
The error I am encountering occurs at the second con.Open() when I try to connect to a .mdb database file which I created in access, the function correctly tells me I have a password, but then once I enter my password I get the error defined in the title, and I have no idea why.
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Mar 11, 2010
I have my .net app running on my home machine, and at one point it threw an exception.Problem is, Windows doesn't tell me what the exception is, just says that it stopped responding and closed it.I want to find the exception and stack trace so I can debug it, since I can't to reproduce the problem inside visual studio.The machine is running Windows 7 x64. I found in the event viewer some minor information:
Problem signature:
P1: server info.exe
P2: 1.4.0.0
[code].....
So based on that I can see there was a null reference. I remember way back when I was on XP, when the application crashed it would show the whole exception stack. Can I find that information somewhere?
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Aug 27, 2010
I need to open and read a Dbase file in my ASP.NET application. When I try to open the connection, I am getting the exception "Could not find installable ISAM." I have tried the solutions in the top answer in this question, but they did not work for me.The filepath of the data file is C:devDATA.DBF. Here is the code I am using to try to open the connection:
Dim connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;DataSource=C:devDATA.DBF;Extended Properties=dBASE IV;"
Dim connection As OleDbConnection = New OleDbConnection(connectionString)
[code].....
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Feb 11, 2011
I am creating a form for work where managers can report when they find a customer's personal information laying around on a desk (we work at a call center where agents answer calls for a wireless cell phone provider, so we take personal information security very seriously). Anyway, I am wondering if there is a way to have a text box autofill with that manager's windows username (since they will need to be logged into their own profile to use the form).
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May 8, 2009
It is possible to catch an exception and throw a new exception which wraps the first exception as an inner exception: [URL] Also, if I call a function and it throws a certain error, but I catch it, will the calling code's catch handler execute? If so, and it is of a higher exception type, is this not wrapping the exception? eg I can throw exception ex of type IndexOutOfRange, log it but rethrow, catch a higher up exception and do something, or I can throw a new exception and wrap an inner exception like:
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Sep 10, 2009
I know that using Dim currUser As String = Request.ServerVariables("LOGON_USER") retunrs the DomainUsername, but I want to know what Group that user is in say in Active Directory.
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Jul 14, 2009
I'm trying to save what the user types in the vb code Dim user as Inputbox("") for example in a .txt file i can save the textbox and listbox but i cnt figure out how to save the inputbox i really need this to be saved the most.
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Mar 6, 2012
When I try to run my windows application it says that there is an inner exception problem and I have no clue what this means,
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Sep 13, 2007
Somehow the User.Config file was corrupted for an instance of my VB .NET app. When access one of my user level config property (My.Settings.MyProp) I get the a ConfigurationErrorsException with the message "Configuration system failed to initialize." I looked at the User.Config file and found that it is empty, it can be opened but there is no XML text contained within.I would like to programmatically fix the file if an exception is seen. When I attempt to use any of my user level properties, I continue to get the same exception. I've tried calling the Reset() but that yeilds the same exception. I then tried Save() to see if it would write out a default version, but it appears to do nothing (the file is not updated). My.Settings appears to be useless at this point.How can I reinitialize the User.Config file to the default config settings without deleting the old file? I would think that there should be some mechanism for restoring this file back to its default. And how can I update/reinitialize the My.Settings instance so that I can access the properties normally?
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Oct 1, 2009
I am trying to get a textbox to have a time value of mm:ss. I am trying to make sure that what the user has entered is in the correct format. i.e. If a user enters in 0923 the exception would be thrown. But if 09:23 is entered it would pass through. Below is the code I currently have. I have tried 3 different things and none work. Any help would be appreciated.
Thanks
Try
'If txtRun.Text <> Format(txtRun.Text, "{0,mm:ss}") Then
'If txtRun.Text <> Format("{0:mm:ss}", txtRun.Text) Then
If txtRun.Text <> Format(txtRun.Text, "{0:mm:ss}") Then
Throw New BadTimeException("Please Enter a Correct Time")
End If
Catch BadTimeExceptionParameter As BadTimeException
MessageBox.Show(BadTimeExceptionParameter.Message, "Invalid Time", MessageBoxButtons.OK, MessageBoxIcon.Error)
Exit Sub
End Try
Run = Format("{0:mm:ss}", txtRun.Text)
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Apr 27, 2009
I have to get the balance from the web server. Once that is done it will call back into my main app with the result.However, sometime the web server fails for some unknown reason. Could be high volume of traffic or something else. However, I haven't implemented any exception handling in my class. As the app that uses this handles the exception. However, the client has confirmed that when the web server does fail it displays a unhandled exception dialog box. Then they have to click continue to keep using my application. So below I am not sure if I should implement the exception handling in my class.[code]
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Mar 8, 2010
I have created a windows form based application and I want the form to add a user specified amount of user controls (with textboxes) on to a panel. The user can then click some button and the controls on this panel are cleared and new ones are added. The user does something and the process is repeated. Now, I wanted these textboxes to support spell checking and looked all over for a free solution.
WPF textboxes support spell checking where the ones in regular win forms do not. I thought I would be able to use these WPF textboxes by adding them to an ElementHost object which is, in turn, within a panel. This panel would be a user control.
So, in my application, I would be able to add instances of these user controls onto the form and make use of .NET's spell checking goodness. This actually worked but after using the application for a while, found that the application would eventually freeze on me due to out of memory errors. I have pinpointed the memory errors to these WPF controls since this problem does not happen with normal textboxes.
When the window is opened and the number of controls is specified, this is pretty much how the controls are added:
Dim xOffset As Integer = 0
For i As Integer = 0 To theNumber
Dim myUserControl As New SpecialUserControl()
[Code].....
There are a lot of results on the internet when I tried to find a solution and I'm thinking that the problem I am having is due to the fact that the WPF control is not going away even after clearing the panel. Following this conclusion, I have tried different solutions regarding disposing these controls or setting them to nothing but the memory problem keeps occurring.
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