I'm trying to manipulate the events of the dataGridViewComboboxColumn in order to execute an SQL statement based on the value change of the cell (IndexChanged) and update the database table. Either this or how can i update several rows in a table from a datagridview ? if you check my previous posts you'll understand the whole story behind this question and to which grid i'm refering to.
View 2 Repliesi am creating ovalshapes during runtime....and i want to trigger an event when its clicked,an array a(5) is declared as ovals
View 2 RepliesI'm struggling to get a label or any item updated during an event handler I've tried Form.refresh/update, application.doevent, trowing laptop out of window, etc...
If i check for TextChange event on the label and return the value in a msgbox it is set however nothing is shown on the form I'm calling COM's in a backgroundWorker so the form stays responsive as the COMS take quite a bit of time to handle certain parts and I dont want the form to look as if it hangs.
Private Sub cmsCon_Change(ByVal iState As ACSCN.LoginState) Handles cmsCon.NotifyProgress is where the update occurs in the handler by calling the UpdateStatus() Method
Here is the
Imports System.ComponentModel
Public Class Avaya
'declaration
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I have a dgv with several DataGridViewComboBoxColumns and when the user selects an item from one of these (product dropdown), i need it to repopulate another combobox (color dropdown) in the dgv for that same row - based on the value i get from the product dropdown. I've tried using the EditingControlShowing event; however, it only fires when I first select the dropdown .....?
Is this the right event I should be using? My other issue is that I don't know how to have the color dropdown re-populate for just the column and row I've selected. Here's my code so far for this event:
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
Dim myRowIndex As Integer = 0
[code]....
I have alot of experience in working in VBA for excel, but not so much experience in creating my own structures so it's all still a bit foggy. I'm trying to capture the event for when the F1 key is pressed, not just when the form is active, but anytime the program is running. The code below expressing the handling is automatically generated for me in VB Express... But I'd like to change the situation to encompass anytime the program is open. I guess I have to reference events that happen in windows in general, but i don't know how to do it. I think i have to create the even in a class module?
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i declared a global variable button:
Dim button1 As New Button()
Now, i dont know how to add a click event in this button since it is a variable.
Before I get started let me tell you guys that I have googled and read the documentation from the codebank. Especially jmcilhinney's post. Here is my problem. I have a nicely working datagridview on my form.
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I am having trouble with a comboboxcolumn in a datagridview. I have a MySQL table with "products" which i have managed to populate the combobox with, but i would like it so when a user picks a product from the combo list, the rest of the fields in that row are populated with the product information, price etc.
View 4 RepliesI have a DataGridViewComboBoxColumn in my DataGridView. I want to programatically drop down the list box so that the items arte displayed. With a normal combo box this is done with ComboBox1.DroppedDown = True. The problem is that the DataGridViewComboBoxColumn doesn't have the attribute DroppedDown.
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I'm completely confused about the event handling. I read some articles about it but after it I just get confused to write and use them in my classes.This is my class i. e.:
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I dont have any argument passing. But I want to know how should I do it too. And I wanted to know if each instance of the Test class, run this event separately I mean each instance by themselves, This event AnEvent() will occur? Cuz I have lots of instances from my class.
I am developing a COM dll library, and I have a little vb.net (vs 2005) application just to test it.I had my object declared in the application as
Private m_VarName As MyLib.CMyComClass
So far, so good.But now, I need an event to inform the application of some things, so I implemented such event in the COM dll, and changed the declaration to
Private WithEvents m_VarName As MyLib.CMyComClass
So far, so good, again. But if I add a Sub to handle my event:
Private Sub m_VarName_OnCaptureStop() Handles m_VarName.MyEvent
..
End Sub
The first time I create the object, nothing bad happens, but if I reinstantiate it
If (Not m_VarName Is Nothing) Then ReleaseComObject(m_VarName)
m_VarName= New MyLib.CMyComClass
then I get a cryptic TargetInvocationException, seemingly related to reflection (which, AFAIK, I am not using).If I remove the "Handles m_VarName.MyEvent" part, everything seems to work. In case it matters, I am not firing any event, for now.
NET gurus... How would you convert this very chunk into VB?
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When I use an online converter (Telerik), the middle line converts like this: Me.timer.Elapsed += New System.Timers.ElapsedEventHandler(ManageThreads) with 2 errors:
1- "Public eventElapsed is an event and cannot be called directly. Use raiseEvent
2- Delegate requires an Adess Of expression. Do I simply add "Address Of" ?
I have an event defined and firing in class B
Public myEvent()
In class A:
Private WithEvents _b as B
Private Sub hander() Handles _b.myEvent
but, this handler does not get called.
I've been trying to figure out how to get this control to work for over a week. It can be found here: A Professional Calendar/Agenda View That You Will Use - CodeProject. It's a calendar/scheduler control that was designed using c# and I'm trying to use it in my vb.net app. I've sucessfully created a dll and have referenced that dll in my project and am able to see the controls in the toolbox as well as put them on my form. My problem is that I can't get ANY of the code that I wrote in the form to fire. No event handlers will work, not even the form_load which handles the mybase.load event. Nada. f a reason that this might be? How do I sucessfully add a handler to the events? I've used <code> addhandler monthView1.SelectionChanged, addressof (and nothing I put here ever works) </code>
View 4 RepliesI have come accross many scenarios of handling datagridviewcombobox events, however none seem to fit my scenario, or I may be missing something.1. I need to capture the column index that the combobox is resident in. This is because I have a complete row of comboboxes that should set the header text to the selected value.here is the code I have so far:' I also use a list of string as datasource publicly declared
Public cs As New List(Of String)
'to insert the combo's into the grid
Dim row As New DataGridViewRow
cs.add("Book")
cd.Add("Author")
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how to write below in vb.net??
Me.connection = New RAPI
connection.ActiveSync.Active += new ActiveHandler(ActiveSyncActive);
Private Sub ActiveSyncActive()
..................
End Sub
I can come up with, if I understood the solution better, I could probably phrase a better subject line.[code]...
View 2 RepliesI am trying to create a basic quoting tool but got stuck on how to clear and change the item collection from within a combobox for a datagrid.What we have is a list of 4 columns like a. Device b.TypeofService c.State d.Price Inside a sql database. Data is also structure like above as well.
I have a datagridview where the user will populate a,b,c and the price will be display and a total at the end. However a,b, and c aren't related in my current application. The combobox will show all possible dinstinct values for each column.
This works fine but I want to refine the application to only show the values of b. which are in the database after the user select the value for a. I have tried searching on how to do this as I assume to the Contry/State/City situation but could not find anything for a datagridview control in VB.NET.
Can anyone point me in the right direction? If I cannot do this dynamically from within a datagridview I was thinking of maybe creating three combo box outside and having it populating the datagridview afterwards but it wouldn't be as nice.
Is it possible to handle a mouseDown event in VB.Net (2008) regardless of the control firing the mouseDown event? Basically, I just want to catch a mouseDown event at the "form level" and don't want to program mouseDown event handlers in every control. Is there a way to do this?
View 2 RepliesI have an object Order with a simple event, Public Event ErrorOccurred(ByVal msg As String)that I raise in the constructor like so when an order cannot be found (along w/setting a boolean error flag:
RaiseEvent ErrorOccurred("This order does not exist in the database.")
[Error] = True
I have a webform subscribed to the order's ErrorOccurred event:
Public WithEvents o As New Order
and I have an error handler method on the form:
Private Sub OnErrorOccurred(ByVal msg As String) Handles o.ErrorOccurred
litMsg.Text = "<p class=""error-confirm"">" & msg & "</p>"
End Sub
When a textbox is changed, it autoposts back to the page and employs the following logic:
Private Sub txtOrderID_TextChanged(ByVal sender As Object,_
ByVal e As System.EventArgs) Handles txtOrderID.TextChanged
If IsNumeric(txtOrderID.Text) Then
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When there is an error (when the Else logic is run), everything performs as expected except the event does not fire. However, since the Error flag is set to true, it means the event MUST have fired, since that line executes AFTER the RaiseEvent line. I've tried everything I can think of, but I cannot figure out what could be wrong. I have events strewn everywhere in my project and they all work well using virtually the same structure.
I need to create event handler for Outlook event 'item send'. This is to capture the event before email get actually sent. I could generate this event handler in C# within seconds but having problem to do it in VB. Any translation online
C# code:
private void Form1_Load(object sender, EventArgs e)
{
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I've 2 projects- one containing GUI and another a DLL project containing some implementations. I'm using Classes in DLL in my GUI. All that I wanna do is when some results are manipulated in the DLL, the final output from DLL should be made available in the RichTextBox present in the GUI project. I tried the WithEvents and also Add Handler. But its not working.In the DLL, I added...
Public Event Report(ByVal info As String)
RaiseEvent Report("The folder has been Copied.") In the GUI, I added...
Public WithEvents Log As RTAF_DLL.CServer // RTAF_DLLis the project name.
CServer is the class // in which the event has been writtenLog = New RTAF_DLL.CServer
Protected Sub Log_Report(ByVal info As String) Handles Log.ReportMsgBox(info)
// Even this is not getting printedMe.RichTextBox2.AppendText(info)End Sub
The problem here is I'm not sure whether or not the event is getting raised. But I set a breakpoint and found that the Event is not handled.I tried including Imports System.Runtime.InteropServicesBut its not working.
Basically, I have a custom child form class which has events that will be passed to the parent. In the custom child form, I have a declaration of a "MustInherit" class that inherits the DevExpress User Control Class.
The reason for this, is I have many user controls that derive from this base class, and the child form can have an instance of any one of these controls, and doesnt care which. The only requirement is that the child form can handle the same events from each type of control the same way.
Some watered down code snippets(still pretty long unfortunately):
'''Inherited Class
Public Class ChildControlInheritedClass
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I'm trying to raise an event in class A and catch it in class B which does not contain class A. Is this possible? [code]
View 10 RepliesI'm developing an application, where I want to show a video and afterwards resume working. However, It seems that the event handler isn't working proberly. The video starts to play, the way I have it expected, however after finishing no message box shows.
Private WithEvents AudioDatei As Audio
Private WithEvents VideoDatei As Video
Private Sub play_video()
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I am using an activeX control to read data from an external source. This data is processed in 5 second increments. Each piece of data is passed through an event. When the event triggers I call a "decision" procedure from the event to process the data and make decisions on what to do, i.e. call other procedures, store the data, etc... This works fine when I have a small number of samples (around 10), however, when the number of samples increases to say 100, that is I am recieving 100 pieces of data every 5 seconds, the "decision" procedure does not fully run. Is it possible that the event trigger is causing the code to exit the "decision" procedure prematurely? I know that the "Decision" procedure starts since I have written data from the beginning of the procedure but not the end of it. how to handle the rapid event triggers?
View 7 RepliesI've created a private internet explorer for personal use but when New Window Event occurs, Default Internet Explorer opens! How can I handle the URL of the New Window and use that for opening a new tab in my explorer navigated to that URL?
View 7 RepliesWhat I'd like to do is raise an event inside a clsGateway instance running inside its own thread and have that be consumed by a clsLoader instance which is also running inside its own thread.
View 7 RepliesI have a form with several buttons on it and when the user presses one of the buttons it begins a lengthy process (takes up to several seconds). What I want to happen is that any subsequent button presses that occur on any other button on the form are ignored until the process is complete from the initial button press. What actually happens is that subsequent button presses go into a queue and are executed in sequence as the processes for each complete. What I mean is, if each button executes a function that takes 2 seconds and I hit 5 buttons very quickly (in less than 2 seconds say) it leads to a sequence of events that takes 10 seconds.... what I want to happen is for it to lead to only the FIRST button press occurring and taking the 2 seconds that it's activated function takes.
I am writing software that interfaces with hardware through a USB to UART converter and am using virtual COM ports and timing is critical. I want something to occur ONLY when I press a button, not seconds later after being queued up and waiting for a previous operation to finish.
I'm looking to populate a treeview control with nodes, at RUNTIME. When the user clicks on the node, it will open up a form to display the data for the device represented by the node.There are three groups of nodes. Each group has its own form that it uses. For example:
-Root
---Group 1
------Device 1
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