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.
View 1 RepliesEntering a date with an Input Box and validating it to ensure it has been entered in form dd/mm/yy. I have a VB Macro in Excel and I want the user to enter a date in an Input Box in the format dd/mm/yy. The entry needs to be validated to ensure it is valid and if possible in dd/mm/yy format which if not would request another date is entered.
View 2 RepliesA 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)?
View 18 RepliesI 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?
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.
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.
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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
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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.
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
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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
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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.
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 (????????)
View 2 RepliesI 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.
This idea of mine is basically more of an experiment ive wanted to play around with so here are some features im after.Firstly some of the conditions i would like to have are to give me total amount of combinations possible for a 1-45 number game. I would like to have some input in this app in regards to possibly entering previous lotto winning combinations and the app to remember what i've previously entered and to eliminate them from total overall combinations left as well update odds at the same time.another condition i would like would be to be able to retrieve a list of all combinations of a required sum i.e a required sum being all 6 numbers added up together, also to be able to remember odds and combinations left To be able to eliminate all even or all odd combinations or even say 5 even or 5 odd combinations basically a filter with these sorts of conditions and of course to update odds and combinations left meanwhile retaining all other possible, or id like to possibly be able to apply filter after filter where i feel the need too i also have a few more conditions id like to have though see what happens if some people can help me out or not guess i might discuss the other conditions id like.
View 5 RepliesI have two Close() functions in same class as below:
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I want to create a page in asp.net website . it has to have one text box . the user enter the productcode in the textbox and click on search . when the user click search i want to display all the information about that product from product table.
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how to learn generate graph by using vb.net. My problem now is input the data and need to genrate the graph.
View 1 RepliesMy project is GUI based. I want to write program in vb.net take some input from user and then i hav to genarate hex file so that it can be run on microcontroller. I just want to know weather hex file generation in vb.net is possible or not?
View 2 RepliesI was wondering if you could assist me with this line of code when am entering the under scroll it says identifier expected.Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim record = (From line In IO.File.ReadAllLines("test.txt") _ Let fields = line.Split(","c) _ Select New With { _
.drawer = fields(0), _ .number = fields(1), _ .title = fields(2) _ }).Where(Function(r) r.title = TextBox3.Text).FirstOrDefault
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?
View 2 Repliessometimes, when I use Form.close() when debugging my program, although the form is closed, the application is still running. I noticed this behaviour when using the msgbox function.
View 3 Repliesmy web browser is my main form and it has a number of sub forms , how can i set it that when i close the main form my sub forms dont close ?
At the moment when i close the main form all the forms close
I try to transfer a vb6 application to vb2010. In the vb6 I start with a login panel that the user enter uid and password autenticate with the DBServer if ok show application main menu and close the login form. the order of the me.close() after the mainform.show() does not change, The application ends.
View 5 RepliesI was wondering if someone can point me in the right direction.I want to be able to have the user type information into specific fields on the form and when they select print, it auto generates a pre made form and just fills in the areas that they type in.
If I have a form that has these fields:
Name:______
Address:______
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I have a situation where me.close() doesn't close the form. I have a form with a button with the code seen below. What happens when the button is clicked is the new form shows, but the original form(calling form) is still there. When I go into debug mode, I can see the me.close() execute, but nothing happens (calling form stays open). When I close the second form both forms close. If I comment out the call for the second form to open the first form closes without problem.
Private Sub cmdNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdNext.Click
Dim f As New frmOrder3
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I'm trying to make a secondary security system to use on my computer. I made a form with a password field in the middle, the size of the form cover the entire screen and there is no border. But now I'm trying to find a way to remove all possible ways to exit the form without enter the correct password like CTRL+ALT+Del, ALT+F4, CTRL+ESC, CTRL+TAB, WIN KEY, or any of the short keys. I'm using Windows Vista Ultimate and everything I've found is for 98 and XP and won't seem to work. So in other-words I want it to be impossible to exit the form without entering the correct password.
View 9 RepliesWhat i want to do is not allow the entering of the same thing in the same field that has already be used. eg. field(entry) 1 is already in the database. So when trying to enter 1 and field(entry) anymore it will give error msg and make change before saving.
View 10 RepliesI have a windows application written in VB.Net 2008, framework 3.5. This app is running on 2 remote desktop servers. I have one user who receives error, This operation has been canceled due to restrictions in effect on this computer. when entering in a text box. When he uses the application on Server 1 he does not receive the error. It only happens to this 1 user on one server.
View 10 RepliesI have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")
Else
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I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.
here is insert record coding
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|hvaccine.mdb")
cn.Open()
Dim str As String
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Entering Date in Access database form vb.net's masked textbox , just need insert qurey
like ; "insert into table1 values(" & age.text & ",'" & name.text & "',#maskedtextbox1.text# or ????"