I have setup a dialog result to ask a question on closing, if they would like to close then the child can close, if the child is needed to remain open then the child needs to stay open.
Private Sub BugAManagerTimerForm_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
If StopButtonPressed = False Then
[code]....
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
View 2 Replieshow can i place other form(child) at the center of midi parent in vb.net windows application i m gettin it at the top left position
View 3 RepliesI have the following code to close a form which is a child. The problem is that when it closes, it closes the MDI parent too.
Private Sub frmTransaction_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
If ListView1.Items.Count >= 1 Then
[Code]....
i have created two forms A and B when button in form A is clicked B is invoked when B is running its not possible to work on A until i close form B. How can i work on A without closing B
View 5 RepliesThere is this software called Harping midi. You can view it here [URL] I would very much like to recreate this software but extend on it. For example. I would like to be able to pick up the "midi notes" and then translate that to guitar tabs. I would like it to have the same features (channel filters, tempo control) those sort of things. Where would I start???
View 1 RepliesVB6 application MDI-Child architecture. Closing event is handled via QueryUnload event in both MDI and child form. Order of event trigger is MDI form closing(QueryUnload) event fires first followed by child form closing event(QueryUnload, I would like to call it as FormClosing itself as it is more comfortable and correct)Now after migration, order of event trigger is occuring in reverse. Child form closing event is firing first followed by MDI form closing event. We want to reverse the event triggering badly because of the logic written inside the closing events. Swapping the logic inside the events is not a viable option considering the huge changes we need to make (we have 31 vbprojects with 31 MDI forms and numerous child forms).
How I can make the MDI's closing event to be triggered first before child's closing event?
I've made a Windows Forms Application that runs fine. It has some buttons that open child forms, which can simply close again without any problem. As I need the form to be in a dll, I changed the application type to a class library and added an extra project containing an exe-file that only references the main form in the dll and shows it. So far so good...
The main form is basically a tabcontrol with a bunch of controls, buttons among others. Five buttons on different tabs use the same handler to open a child form. When I click the button on the first tab everything works fine. The form opens and when it closes, only the child closes. When I click any of the buttons on the other tabs, the child form opens and when it closes again, both the child and the main form close...
I am stumped, especially since all buttons use the same code to open the child form and everything appears to be completely identical, yet the results are not. Below I have pasted the code that opens the main and child forms. I am undoubtedly not looking in the right place, but I also have no idea where to look anymore, let alone what to look for...
The code opening the main form:
Public Sub StartProgram()
'Load the form and show it
Dim frmProgram As frmMain = New frmMain
[Code].....
I'm trying to give the user a chance to cancel FormClosing of MDI Parent by throwing a "Are you sure?" msgbox with an e.cancel however when FormClosing is invoked by MDI Parent, all MDI Children close first, before the msgbox appears.
I was wondering if there's an easier way to prevent MDI Children from closing rather than having to e.cancel every child form's FormClosing until I get a positive response to close and then push all the close events on the children because that seems like too much of a hassle if you have a lot of MDI Children.
EDIT: I guess the only solution I can find is adding If e.CloseReason = CloseReason.MdiFormClosing Then e.Cancel = True to the FormClosing event and using ApplicationExit instead.
I'm developing Applications in VB.NET 2008.
I have MDI Parent Form and i'm going load all form as MDI child. Here i'm going to give option to "Close All" toolstripbutton in top of MDI Parent to close All mdi child forms.
Now i would like to check that On click of Close All Toolstripbutton , i have to close all mdi child form but except those form is on process, example, I have opened/Loaded 5 MDI child forms within MDI Parent Form.
Child forms are ( just for example ) ,
1. Customer details Form
2. Item Details Form
3. Import Orders Form
4. Stock Details Form
5. Production Entry Form
Here 3.Import Orders form is importing from Excel with 5000 records and 4. Stock details form exporting to excel.
So now if i click "Close All" button then i have close only Idle form i.e 1,2 and 5 but i should not close 3 and 4 since its on some process.
So Is there any .NET option to check that form in process/idle or do I have to check manually by having any Flags ?
It is my goal to write a program to run a retail store. I am an intermediate Access developer, so I have a good grasp of the basics.However, I find that developing in VB 2010 is quite different.I will have forms for:
Company Information
Employee Information
Supplier Information
Customer Information
Invoices & Purchase Orders
All I really need to know at this point is the code to open and close each form.
I am making an address book for my final project in school, and have a few questions. In my address book, there is a feature to add groups so you can sort your contacts. The problem is, the add group feature is in a different form, I tried calling a procedure from the parent form to refresh all data but it does not work.[code]
View 2 RepliesI have a parent form that has a list of items and each item has a unique ID. The user can open one or many of the items in a child form (it is set up in a tabbed MDI), but it can only open one instance of each item at a time.
In the parent form, I was going to make a collection (or something like that, maybe there is a better way) to keep track of which items are open in the child forms. I need to know when each child is closed so that it can be removed from the collection and reopened at a later time. I was thinking that when the child form closes, it somehow does something (like raise an event) that tells the parent form to remove the unique ID from the list of current open child forms.
My questions are, is this a good way to do this and I am pretty sure I would use the form closed event in the child form to update that parent form, but as well, I didn't know if this is the best way of handling it.
If raising the event is a good way, are some examples on how to do it out there? I found some for controls, but not while the form is closing/closed.
i have a parent form which is having a grid view. In the KeyDown event of the grid view i am calling a child form. If the user closed the child form, my application should close both the parent form and child form. What i have done is, i declared a boolean in the child form and passed the boolean value to parent. May be the code below will give the picture of what i am trying to do.
Private Sub gvJournalEntryDet_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles gvJournalEntryDet.KeyDown
Form1 is a mdi container. It has a bunch of forms that can load inside of it as mdi children. If I close each open form inside the form1, and then click the red X at the top right, application exits fine.If I click the red X without closing the forms inside I get: An unhandled exception of type 'System.CannotUnloadAppDomainException' occurred in mscorlib.dll
Additional information: Error while unloading appdomain. (Exception from HRESULT: 0x80131015) However I can break from it. How do I get the application to not show that error? What must I do to fix those inside forms or close when the red x is clicked?
Dim frm As Form
For Each frm In Forms
Set frm = Nothing
Next frm
The above code is what I used in VB6 to close all forms associated with my programs before my program closed. I have been searching for information on how to make sure all forms are closed when closing a VB2008 program.
I have seen info on using the Project Property Shutdown mode When startup form closes and I currently have this set.
Is this all that is really necessary? Will the garbage disposal close everything else to free up RAM?
Also, if I have several forms open and want to close all from the main form without closing each one individually, what is the best approach? Is there a collection like in VB6, go through the collection, compare it to the name of the main form and close it if it is not the main form?
Is it possible to convert MIDI files (.midi or .mid) into a .wav or .wma file in Visual Basic.NET (2010)? If so:
1: How would this be done?
2: If the output format can be .wma, how can one write the tags (such as artist, album, etc.) to the file in VB.NET?
I am saying .wav or .wma because I know that Microsoft does not have any rights to the MP3 file or something like that.
[URL] what tool did this person use to analyze the midi file? was it a midi file? how did they turn it into this kind of animation?is it possible to make an application like this in vb.net?
View 2 RepliesHi to all, i really need some help with a piece of code. Im developing an app, which receive midi TIMECODE (MTC) and shows it on a textbox. when i start the app, it runs ok, and shows the mtc on the textbox, but after a few seconds it crashes and shows an error:
"A callback was made on a garbage collected delegate of type 'MidiTesting!MidiTesting.MidiIn_Callback::Invoke'. This may cause application crashes, corruption and data loss. When passing delegates to unmanaged code, they must be kept alive by the managed application until it is guaranteed that they will never be called."
[Code]...
So for the past 3 days I've been perusing the internet for a way to run a command when a MIDI signal is sent into VB - where/how should I start? As a matter of fact, I haven't found any way to enable MIDI input, period.
View 3 RepliesIs it possible to load a content of a MIDI file into a string and then save the string back to another file? I have been trying for a while, but no luck...Although I have no error, and the new file, view with notepad, looks the same as the original, but it does not want to play..
Dim urlpath As String = (Application.StartupPath & "UserMIDILibrary"
Dim fname As String = Path.GetFileNameWithoutExtention(pathload)
fname = fname & ".mid"
[code]....
How would I go about programming a Midi Creator?
View 2 RepliesI have found a midi parser, it WILL work, but first, I need to create a file called consol.I havent got a clue what language this will be in, or is in. I really don't know.
View 10 RepliesI'm using vb.net and have got the midi out functions working properly. I'm now looking to add midi in functionality to my project and I am confused about the use / syntax of MidiInOpen and the associated midiInProc placeholder function. I think I need to understand and use a Delegate function to point to my Midi in handling procedure but nothing works for me and I can't find a suitable example anywhere.
Does anyone have any advice or examples as to how to implement Midi In in vb.net using the Windows multimedia API please?
I'm trying to play a MIDI file in my VB.NET (VB 2010 Express) and things work well with the code from this other question here on Stack Overflow, which I translated from C to VB.However, I also need to PAUSE, while that code is only for open and stop. I edited the code like this:
Imports System.Runtime.InteropServices
Imports System.IO
''' <summary>
[code]...
I am looking for a way to play the usual MIDI sounds in a VB program. Similar to the beep program (ie console.beep, leading to timer1.start etc.)but instead of an annoying bleep, have a MIDI sound (like a flute, violin, clarinet, etc.). Is this possible in VB 2008?
View 10 Repliesi am wondering if it is possible to make a program with visual basic that records from the microphone, then converts it into a midi file.
View 2 RepliesI need some sample code for sending data to the MIDI device on the computer? I'm not quite sure what the hardware's address is though.
View 2 RepliesI just started programming in vb 2008 Using vb studio 2008 and vb 4.0 Running Windows XP Home Edition My question concerns the capabilities of vb to call for the internal sound cards and/or midi synthesizer.Can a module call the sound card for it to play MULTIPLE notes at the same time, notes of fixed frequency and duration?
I have tried programming vb 4 AND vb2008 for them to modify the default BEEP sound: using a code i found on internet:private declare Function Beep lib "kernel32" (byval soundFrequency as int32, byval soundDuration as int32) as int32
[Code]...
In Guitar Hero the notes are saved on a .mdi file how can read the file ( analysis not audio playback ) ?
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American_Idiot_MIDI.zip (1K)
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