Can Windows Form Trigger when a control has been modify or not ? I mean i have 3 panel and inside of those panel have a textbox, how am i able to find whether some of the textbox where modified in a specific panel? i.e panel 3 textbox2 has been modify i want that i have a notification that panel3 textbox were modified
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I have a modified button control with a string array in it. I am having trouble sending the string array to the form with the modified button on it. Anyone know what i can do? The form uses a arrayList to hold the buttons since they are made at runtime.
View 4 RepliesThe code is listed below which hopefully illustrates what I'm trying to do:[code]....
View 12 Repliesi'm trying to trigger control events from outside the form that the control is placed. The idea is test of that control.
How this can be done.
For example I'm trying this
Private Sub SendGenData(ByVal ContName As String)
Dim testControl As Control
For Each testControl In Me.Owner.Controls
[Code]....
I have a main form that has a dynamically generated treeview and also a panel control. Depending on the selection made within the treeview the panel docks 1 of three diffrent usercontrols which are full sub forms(done for ease of modifing design of sub form rather than layering panels on top of panels).Upon button click withing usercontrol i wish to trigger event within main form.For example delete button wich then triggers to remove current selected node from treeview. code for 1 of three diffrent user controls
Dim ctrlQ As New QuoteUC(TrViewQuotation.SelectedNode)
PnlSubFormDock1.Controls.Add(ctrlQ)
Code for delete button for which i need to raise event.
If MsgBox("Are you sure you wish to delete this customer ?", vbYesNo, "Delete Record") = vbYes Then
Deletecustomer(n)
End If
It is possible to create windows service using windows form control in vb.net. give me the url or links. The windows forms control such as, Timer control, list-box, notify-icon control etc.
View 1 RepliesI have created a service which correctly starts in the services section in windows. Now I am trying to get it to trigger an event.I put a message box in the timer section just to experiment with getting it to pop up and it does work when I run it within vb but when I deploy it as a service it no longer pops up.
View 39 RepliesI am designing a program that will show a reminder form when the computer is shutting down. (The reminder is to go outside and get the Bluetooth gps aerial.) I have tried using the formclosing event, (triggered by windows shutting down) to flash the form up on the screen using windowstate = normal. (At loading, the form windowstate = minimised). This did not halt windows shut down and the form was only on the screen for a fraction of a second before windows shut down. Can I trap windows shutdown until the form btn_Yes has been selected?
I think this msdn library article is talking about this. [URL]
I have looked at the enumprocess api, but this is quite a bit outside my current knowledge level. From what I have read, enumprocess would be suitable as we all run the same program on our laptops and I could check for the change of state of that program. Eg. �OK, program A is closing, the computer must be about to shutdown, so flash up the reminder form.�
I have an Inherited Control with a Property that can be set in the designer. There's some code in the Set procedure to make sure it's set appropriately. However when I build or run the project that property is changed, I am assuming it's the sanity check code in the Set procedure that's causing it to be changed along with some VS beahviour. Here's the code:
[Code]...
I am opening a web site in a vb.net 2008 webbrowser control. I want when I open the 3rd page of the web site then after the page is loaded , control focus programmatic-ly by Triggering TAB keypresses automatically by my code .
View 1 RepliesI have a basic Windows form with one Crystal Reports form veiwer control on it. When ran on the development machine it displays the report fine.After build and publish the application is now installed on a user PC. I am getting an error that the Crystal Decisions. Windows. Form version 12.0.2000.0 can not be found. All the Crystal dll's are in the install directory but none of them are being installed in the install machines GAC.Am I setting my publish output up wrong, may references wrong, or is the local GAC files the problem. The message is so criptic, it doesnt really point me in the right direction.
View 1 Repliesi have to develop a software for motorola mc9090 that reads barcodes and rfids simultaneously, so i need to catch two different triggers: the one on the keyboard for barcodes and the other in the backside for rfids.the problem is that i didn't find any sample that illustrates how to set the trigger to read only barcodes, i found something on emdk 2.5 samples that shows how to set the trigger to read rfids but nothing for barcodes. So when i press any trigger the barcode reader is always enabled with rfids reader.Does exist a way to manage them with separated triggers?
View 1 RepliesI wanted to know how I would go about coding a website form controller in vb.net?I want to be able to connect to a website then enter a username and password by only entering the username and password and then pressing a login button on the windows form. How would I go about doing this?how to control website forms using windows forms.
View 3 Repliesam working on this chat app for a client and i have got most of it working with but i have hit a snag when the user clicks the SEND PM button it does what it is suposed to sends the username to the client and then opens the pm window but when it then freezes when it loads the form
View 3 RepliesI have this code in my ViewProductsInventory (which is called from my MainForm by ShowDialog):
Private Sub ViewProductsInventory_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Tb_inventory_datesTableAdapter.Fill(Me.InventorySysDataSet.tb_inventory_dates)
Dim inventory_date As Date
inventory_date = Me.cboInventoryDate.Text
[Code] .....
Upon clicking the editbutton will execute EditForm.ShowDialog()
And in my EditForm the record will be updated, after which will trigger ViewProductsInventory.btnSearch_Click( ViewProductsInventory.btnSearch, EventArgs.Empty)
And then the error "Conversion from string "" to type 'Date' is not valid" occurs.
I tried Msgbox(Me.cboInventoryDate.Text) and returns nothing. I'm assuming that my cboInventoryDate is not being populated at this time therefore when btnSearch_Click is triggered it receives nothing.
Every time I modify something on a form (add or delete controls , modify their colors etc) , when I debug the program (with the Play button), I get a message saying: The file C:........MyForm.vb cannot be modified at this time .
Why is this happening? I have noticed that the only way to bypass this problem is to save before debugging , but that is not convenient because I don't want to save something that I haven't decided yet. One more thing that I have observed is that this only happens in projects that have been created with the Upgrade Wizard (from VB6). This never happens in new projects. Does anyone know why is this happening ?
I am trying to create a form that can be modified by other developers. For example kind of like firefox, developers can make extensions/toolbars and firefox uses them. How I can write my code so that other developers can add controls/toolbars to my form.
View 3 Repliesi have a little problem in calling the button1_click event of form1 from my form2.whenever i use call form1.button1_click() it gives me an error saying argument not specified for parameter 'e'. can anyone please assist me on fixing this?
View 2 RepliesI would like to be able to fire/trigger an event when the form is no longer the top most window (ie the window that is on top of all other windows), and then close the form with me.close()
View 5 RepliesI've been playing with VB.NET for a couple days now, and I was looking into key input controls, now I've managed to have it react to keyboard buttons being pushed inside the main form (wasn't hard), where it counts total amount of keys pushed, not what keys are pushed etc.
What I'm having a harder time is finding a way to have this same functionality even if the form isn't active (for example when minimized to the system tray). I did find a similar question on these boards, but it was regarding hotkeys and that user was just referenced to the hotkey API, which is not what I am aiming for.
I am creating a form and I have a label that will display the user's name, but what I need to do it trigger a text box when the application opens that will allow the user to type in their name and then assign that value to the label in my form. How do I trigger the text box and assign the value to my label? My label is named lblStudent.
View 11 RepliesI'm trying to trigger when the mouse leaves the form, but I don't want to trigger the mouseleave when its over controls; as it is doing at the moment. Can you suggest ways to keep triggering the mousehover over form while on controls? but mouseleave works still when the mouse leaves the form (not when hovering controls) ?
View 1 RepliesI have one form (FormA) that fills a combobox with data when the on-load event is trigged.In that combobox, I can select "New value" which opens another form (FormB) on top of FormA.On FormB I add the new data and saves them to a Database.Everything OK till here.I then close FormB.... and return my attention back to FormA.Now I would like to reload data into the combobox, but everyway I have tried, it will not work.
View 5 RepliesI have been searchingall day to find out it, but did not find the best way, all but I found one forvb. That framework can not beused on 4, but can be used in the framework 3.5 and below.
View 4 RepliesI'm trying to create a windows user control project that has a textbox placed on it.I want the textbox to fill the user control window.I've built the control and added it to another project, but it isn't behaving the way I want it too.When I drag and drop the control from the toolbox onto a windows form and try to resize it, because the textbox.multiline property has been set to True, the Textbox resizes horizontaly and not vertically (just like normal textboxes do) however the underlying user control window resizes which is undisireable. How can I get the user control window to stop doing this.
View 2 RepliesSuppose I have a label control on a windows form called "UserName". How can I refer to that label programmatically using the label name? For example I can do:
For each ctrl as Control in TabPage.Controls
If ctrl.Name = "UserName" Then
' Do something
End If
Next
This seems quite inefficient. I would like to do something like: TabPage.Controls("UserName").Text = "Something" I did some googling but couldn't find a satisfactory answer. Most suggested looping, some said .NET 2005 doesn't support direct refenece using string name, and FindControl method was asp.net only...
[Code]....
I am creating one application using visual basic.net and sqlce I have two forms name Form1 and Form2.
I used Form1 to add data to database using OLeDb command I used Form2 to show data in datagridview by using dataset[code]...
Form2 Datagridview show the old data only, it do not show the recently added data by form1. I mean when I build my application datagridview show the data which is already in the database, but it does not show the data which is added by the form1 during run time.
Some one suggested me to fill the datagridview at run time by using OLeDB command. Then I created Form3 to fill the datagridview2 by using OLedb command and datareader and found that Form3 shows the recently(added by Form1 at run time) added data.
I have this piece of code:
ConnectToDb(pgconn, "MINTACEG")
pgcommand.Connection = pgconn
pgcommand.Parameters.Clear()
pgcommand.Parameters.AddWithValue("@b_sorsz", frmfokkonyveles.dgvfokbiz.SelectedRows(0).Cells(1).Value)
[code]...
For a small project I need the possibility to "trigger" a function in a Window-form-application from a Service. So there are 2 program's. One is the visible Form application with textboxes and buttons and so on... The other is a sort of service program that runs on the Windows Service account.
Actually the second program is a command-line tool that gets fired by a PHP script from the Apache server. Because the command-line tool runs in another "environment" then the Windows-form-App, it is NOT possible to communicate (trigger) with both apps.
I know I have to use IPC (InterProcess Communication) and I have download the dozens of sample apps, but I still can't get it to work.
PLEASE can someone give me some sample code, or perhaps sample program(s) to help me out?
I think it's really easy to build what I want, but for me it's a no-go :-(
So for example it has to work like this:
PHP script (running at Apache server) runs a "console/service" app (already working) which "triggers" (via IPC) a already running Windows-Form-app (also already working app) that for example shows a MsgBox with the text in it that is sended by the "console/service" app.
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.
