Form Close After An Error Occurs During A SaveFileDialog

Oct 13, 2009

I am having an issues with my code causing my forum to close after an error occurs during a SaveFileDialog. My problem is if the form closes after an error occurs that doesn't save the file, the person would lose their text they made. If there a way I can embed the code in an If statement or Try catch so it only closes if the file was saved? Here is my

[Code]...

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Error Occurs When Using More Colums

Jun 22, 2010

My code was working fine when I tried with 3 columns. Now, when I mode columns (13) it throws the error.

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Close A Form That Has A Validation Error?

Oct 10, 2011

A wrong entry into a textbox causes the errorprovider to appear (set in the validation event e.cancel=true).Can I close the form (X in the upper right corner)?

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Error On Me.Close() Event Of Form

Sep 15, 2010

I have a VB.NET application writtene using VS 2008 and have been receiving a weird error when a form is closed - it gives me the following error message:

Windows has triggered a breakpoint in MyApplication.exe.

This may be due to a corruption of the heap, which indicates a bug in MyApplication.exe or any of the DLLs it has loaded. This may also be due to the user pressing F12 while MyApplication.exe has focus. The output window may have more diagnostic information.

The immediate window then has this error message:

Critical error detected c0000374

I tried fixing this by just hiding the window, but this simply moves the error up the chain and I get an error when exiting the program as it tries to close the form:

Unhandled exception at 0x7700e29b in MyApplication.exe: 0xC0000005: Access violation writing location 0x00000000.

I don't think I'm doing anything particularly strange in my application - reading from and writing to a database is about as complicated as anything gets for me. I've tried using AppVerifier, but then the program won't even open. I'm at a real loss as I don't know anything about memory management, or what a heap is. I just can't work out why this error is happening

By the way, the application compiles and runs fine on my old 32-bit computer running WinXP professional, but my new 64-bit Windows 7 computer is just not having it, even though I have targeted the compile for x86 and followed every bit of advice I could find on geting it to work in Windows 7. Should Windows 7 and VS 2008 really be incompatible? Do I need to get VS 2010 instead?

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Error When Hiding And Close A Form

May 1, 2012

I have a log in form, and once you log in, it's supposed to show a new form.

The problem here is...if I use Me.Close(), then both of the forms close, and the application terminates.

If I use Me.Hide(), than the first form doesn't actually stop running in the memory, and proceeds to run in the background even after you're done with the program.

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Threading Error On Form Close

Aug 15, 2011

I'm upgrading some code from VB2003 to VB2010. I'm now getting an error when I try to close a form from a media player event.

[Code]...

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Form Validation Error, Does Not Allow To Close The Form

Jun 8, 2012

I am using the following code

Private Sub txtAIT_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtAIT.Validating
If txtAIT.Text <> "" Then

[Code]....

In form I have a close/Cancel button, and I set Causes Validation = false, and on its Click I used "Me.Close", but form can not be closed.

Button Works fine, but form can not be closed until text field has been validated.

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Calling A DLL From .NET - Error Occurs On Windows 7?

Feb 8, 2012

I have a VB6 DLL that wraps a call to a 3rd party component. When I call my DLL from VB6, everything works fine, but when I call it from vb.net (2.0 framework targeted - VS2010) I get this error:

AccessViolationException occurred

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.This error only occurs on Windows 7 (Windows XP clients work fine).I've looked this up and all the articles I found talked about the declaration not being correct.I am not declaring any APIs calls though, the 3rd party component is early bound in my VB6 DLL.I can run the DLL, set a breakpoint,and it goes into my VB6 function, but errors calling a function in the 3rd party component.My VB6 DLL takes 3 string and one 32bit numeric (long in VB6) parameters. The 3rd party's DLL function that I am calling is taking a string (bstrDNSID as string is what Intellisense shows in VB6). This is where it errors.

Update: None of the marshalling has helped, so I tried creating a test sub in my VB6 DLL. I hardcoded all the values within the DLL's test sub. It works fine when called from VB6, but gives the same error as above when running from .NET. Also of interest, when I have the VB6 DLL running from the VB6 IDE, I do not get the error when calling the DLL from .NET.

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Detect When A Popup Error Occurs?

Mar 30, 2010

I have an error appearing in my webbrowser, and as there doesn't seem to be a solution to stopping it, i'm attempting to just detect when it occurs, and use sendkeys to press enter.[code]..

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Throw A Message Box If An Error Occurs

May 4, 2009

I wanted a Message Box to appear when a file can't be found, for example. I made a Combo Box (ComboBox1) and a button, this is what the code was:[code]If a file can't be found, I want a message box to appear, not an Error Provider, I tried this code, but it did not work:[code]

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Getting SaveFileDialog Error

Apr 14, 2010

[code]...

This code works on my local machine (Windows 7 Ultimate).When I tried it on WindowsXP,it didn't even open the dialog,instead it gave me an Unhandeled Exception error.

I can't remember the specific details of the error,but I do recall my profesor telling me there could be something wrong with permissions(me being the ONLY user on my machine,and his machine having multiple user accounts).

But what does all that have to do with opening the SaveFileDialog?

Could it be that SaveFileDialog1.AutoUpgradeEnabled = True is causing the problem?

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Asp.net - Find Line # Of Code That This Error Occurs?

Nov 18, 2011

My asp.net website logs errors when they occur, but only sometimes shows the line of code where it occurred. Is there a way to find out what line of code my error is occuring on when the line is not provided?My Global.asax logs the error with the following code:

Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
'Get MemberNumber
Dim MemberNumber As String

[code]....

It looks like the checkbox labeled "ckAdmin" is causing this error, but I do not know how to trace it. How should I go about tracing down this error or finding the line of the code this error occurs in?

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Error Occurs When Closing Serial Port?

Jul 5, 2010

I have developed serial port communication application using vb 2008 with serial port class.

Previously everything was ok. Now a days error occurs when closing serial port.

At the time of closing there is no receiving data .

Error is "The i/o operation has been aborted because of either a thread exit or an application request"

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Generate Notifications Whenever An Event / Error Occurs

Jun 30, 2009

I am currently using Snarl to generate notifications whenever an event / error occurs in my program. How would I go about coding a native VB notification instead of using a 3rd party program?

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Handling Datatable.acceptchanges When Error Occurs

Jan 19, 2010

if the rows CurTXId is 0 then I insert new records. and then call AcceptChanges on the PeopleTable.now if I have an error, for example conversion from null to Decimal causes an error and the first insert occurs before the error. now i have a row inserted but AcceptChanges hasn't been called yet.then i click save again and the insert happens again since the rowstate hasn't changed.how should I handle this?[code]

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Programming A Dialog That Pops Up When Error Occurs?

Jul 31, 2009

As part of a review of my program on Softpedia, the Reviewer stated the following: If you call on a piece of software and it is not installed on your computer the application will pop up a nasty error message that may discourage beginners. Popping a dialog saying the reason of the error or that the software is not installed on the system would be a great fix.

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Close Form = Cannot Access A Disposed Object Error?

Jul 17, 2010

By default my app loads the activation form. On the form load it checks if the license is valid and if so i want it to close/hide the registration form and open the form that starts my app.

When i try to do this it crashes my app with the following error

Quote:

Cannot access a disposed object

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'check if a valid license is available

[Code]....

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Close The Form Without Entering Any Input And Not Generate An Error?

May 8, 2011

i am using validated function and i would like to close the form without entering any input and not generate an error. is there a method that changes the exit command to allow this?Sometimes the answer is so blindingly obvious i fail to see it.

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Designer Generated Lookup Throws Error On Form Close

Jan 17, 2011

I have a project with multiple forms that are used to edit tables in a project data source (access DB). All the forms work fine, except the ones that use designer generated lookups.

When I am editing a row in a bound DGV on the lookup forms, they function fine, and the save button works fine. However, once I go to close the form it starts throwing "System.ArgumentException: DataGridViewComboBoxCell value is not valid." multiple times.

I've created applications similar to this in VS2008 without any issues.

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Runtime Error 217 Appears When Close The Last Form Of An Own Made Program?

Jul 13, 2009

I've made a project with serveral forms and instances of classes.The program works fine until the last form close.2 messages were shown:1. The exception unknown software exception(0x0eedfade) occured in the application at location (?????????)2. Regular dialogue "Runtime error 217 at (????????)

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NullReferenceException Error Occurs In Kinect-controls Window Project

Dec 7, 2011

So, concering my project: I am trying to control an RC Car via Kinect, until now I got it working with key control only (eg WASD). So, I am using a Velleman K8055 Interface Board + the Kinect and VB Windows Forms. So far, so good, I created 4 Forms: menu, info, kinect-controls + wasdcontrols window. The error only occurs for my kinect-controls window (german name: Steuerung.vb) & that's my source

[Code]...

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Using IASyncResult To Wait For A Stored Procedure But Missing When An Error Occurs In The SP?

Jan 28, 2012

I have an application where I make calls to multiple SQL Server Stored Procedures,keep the user aware that the program is still running and how long the specific SP has been running so that they can abort it if it's taking too long.

My initial attempt was to wrap up each call to the SPs like this example:

Dim cm As SqlCommand = Nothing
Dim Conn As SqlConnection = Nothing
Dim Tran As SqlTransaction = Nothing
Dim PrevTime As Date = Nothing

[Code]...

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VS 2008 : Modal Form Hide Instead Of Close - Main Form Does Not Close

Mar 20, 2009

I have a main form that has a button with which a smaller form is shown. Think of the smaller form as the Find/Replace dialog in many applications, such as Notepad. It's important that the form is (what I believe is called) modal. What I mean is that it always stays on top of the main form. I ensure that by calling the Show method with "Me" as the owner argument. Whenever the small form loses focus it will not disappear into the background but stay visible (albeit out of focus). If you don't understand open up Notepad and have a look at the behavior of the Find/Replace dialog.

Here's my problem: instead of actually closing the form when the X is pressed, I want it to simply Hide itself, so its position and the state of any controls (checkboxes etc) is preserved automatically.To achieve this I simply cancel the FormClosing event and Hide it:

vb.net
Private Sub Form2_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

[code]....

To show the form, I use the following (note the (Me) to make the main form the owner of the form; this ensures that it remains visible even when it is out of focus):

vb.net
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Form2.Show(Me)
End Sub

Now. When I run my project, and open the Form2 (small form), then hide it again (by 'closing' it), I can no longer close the main form (Form1)! It seems the main form cannot close when the small form still exists (albeit invisible)...?? When I don't use the Me argument in the Show method, I don't get the behavior I want. I know I can set the TopMost property to True but that will also cause it to become visible on top of all the other forms, even windows not part of my application.

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VS 2008 Table Adaptor - Error Occurs When Adding Column To Query

Aug 10, 2009

I have a table adaptor that pulls from the sql database, when I edit the table adaptor query it makes this specific table adaptor not a part of the dataset. I have added a column to my database which will contain an integer, when I try to add this column to the query this error occurs, i am using the configure area of the table adaptor.
Error 'AuditProductsTableAdapter' is not a member of 'MemKingClient.MemKingDataSetTableAdapters.TableAdapterManager'.

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VS 2010 : Show Message Box Error If System.componentmodel.win32exception Occurs?

May 16, 2012

I created a simple program which basically launches programs installed on 32-bit system in the C:Program Files directory. I purposely put an .exe line of code in the compiler but that .exe wasn't installed on the system, I was expecting for an error when I tried to click the launch button and I did. NOTE: I already have a beginning If statement and that program is actually installed in the system, works perfectly no errors appearing.

ElseIf lstMultimedia.SelectedItem = "HyperCam" Then Process.Start("C:Program FilesHyperCam 2HyCam2.exe") 'this program doesn't exist in the system"

When the error appeared I looked at it in detail and found it was a system.componentmodel.win32exception type of error, I'm guessing that means a file doesn't exist in the directory I specified therefore the program displays an error.Now what I want to do is display a message box saying along the lines "This program cannot be found in your system" or something like that. But I don't know what the actual syntax/code for it, so far from thinking I have this.

Else : lstMultimedia.SelectedItem = 'no idea what to put here Then MessageBox.Show("This application cannot be found in your system or is installed in a different directory", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End If

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Trigger A Refresh On A Form When An Update Occurs?

Apr 23, 2009

how to trigger a refresh on a form when an update occurs in my business logic.

This isn't an issue for 95% of my forms because they call the update from the form that needs to be updated. However, In some cases an inner form does and update that requires an outer form to reflect this. I've read about Handles, Delegates, AddressOf etc etc and I'm drowning in options.

In simple terms, I need three things to happen

1. Form2 (inner form) has updated info, so the user clicks Save

2. Save calls my Data Access Layer and updates the database

3. Form1 (outer form) has a DataGrid that needs to be notified so it can update via a Sub LoadGrid

It's stage 3 I can't do. How do I trigger a Sub in Form2 (LoadGrid) to do the refresh from an external class.

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Error : Private Function Close() As Integer Implements IVsPersistDocData.Close Has Multiple Definitions With Identical Signatures?

May 12, 2010

I have two Close() functions in same class as below:

[Code]...

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VS 2008 - Savefiledialog - Export The Data From Dgv To Csv Txtfile - Error - Empty Path Name Is Not Legal

May 30, 2010

With this one..

SaveFileDialog2.CreatePrompt = True
SaveFileDialog2.Filter = "Text (*.txt) |*.txt|(*.*) |*.*"
txtBrowse.Text = SaveFileDialog2.FileName

[CODE]...

I'm trying to export the data from dgv to csv txtfile but i'm getting this error..Empty path name is not legal.

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Forms :: Forcing A SaveFileDialog Box To Open On Top Of The Form Instead Of Underneath It?

Jul 27, 2011

I have a situation where I am opening a SaveFileDialog box but it opens underneath my form instead of over it. This is causing my users some confusion. Does anyone know of a way to force that dialog box to be topmost at all times?

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[2008] Notify Icon When The User Clicks The Close Button That It Doesn't Close The Form?

Jan 17, 2009

I have set up a notify icon for my form. I want to make it so that when the user clicks the close button that it doesn't close the form it just takes it to shows the notify icon. They can exit the program from the notify icon. Can someone tell me how to keep it running?

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