The below code snippet works well for making ALL the text entered into a row is entered in upper case. However I only want to force the upper case on the last column. I was thinking I could put a If Then before the It TypeOf to determine if I was in column 3 (and exit the sub if not) but I couldn't get the syntax right.
VB
' Begin Code Insert
Private Sub dgvEntryPeople_EditingControlShowing( _
[Code]....
Not sure what to call this, but I have a number of dataseries that are being updated through an API connection. My form has charts that shall display the data, and I want the charts to subscribe to the update events raised by each data series. So I need the form class (or one of its member objects) to send a request to the BLL. But I don't want it to dig into the tree structure of my BLL by get to the desired data series. So.. I guess I must either send my chart object as just a "type Object" down to the BLL, to add the handler.. Or, I must request an anonymous object of the dataseries event to be sent to the form class? Am I on to something here? What to prefer? And how do I actually do this stuff?
Also it's a question what to add the handler to? I try to refactor my code as much as possible, so I try to make type of "Manager objects", like for example instead of adding chart object directly in my form class, I make a ChartManager class that the main form has a single object instance of. Then this manager has a list of chart objects etc.. This is like a UI logic layer, and will take a reference to the mainBLL object instance from the Main form class. I guess it's proper to add the handler directly to the low level ZgChart object...
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I have some code to create dynamic serial port objects, now Im trying to add an event handler to the object so I can capture the dataReceived event. But the vb designer is saying ".datareceived" is not en event of 'object' in this case serialports(dComPortNum)
Public serialports(5) As Object
dComPortNum=1
serialports(dComPortNum) = New SerialPort
[code]....
I have progressbar controls added at runtime and I used AddHandler to assign a function to handle a click event on any of them. All is fine, but when I am coding in that function using sender, autocomplete (intellisense?) doesn't show the available properties, methods, or whatever for that object. Yet, when I guess, my code is valid and works just fine.
I have been at this project all day and advanced searches here have been so very helpful. My project is a multiple progressbar timer app that talks to a remote MySQL database on a Linux CentOS LAMP server on my LAN. I can't even begin to relay how much I have gotten my head around today.
Perhaps surprisingly I haven't added an event handler programatically before and I'm having trouble getting my head around AddHandler.I am creating a series of DataGridView controls in a loop and want to subscribe to the CellFormatting event on each of them.The event handler signature is as follows;Private Sub ConfigureRows(ByVal sender As System.Object, yVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs)This works fine when I enter it in the visual editor properties box but I can't figure out how to give it the correct arguments using AddHandler.
View 2 RepliesI'm building an Expandable Groupbox control (source will be available in the codebank if I finish it), which is basically a groupbox with a [-] or [+] button to the left which allows the user to expand/contract it.
I've got it working pretty well, but now I want the user to be able to click the button in the designer to expand/contract the groupbox, rather than having to find the Expanded property in the property list every time. The ExpandableGroupbox control is just a UserControl with two panels (header and container), with an actual Button and a label for the text in the header panel. I know how to enable the user to click the button, even in the designer (this is done using WndMsg's and stuff, don't really understand that but it works!).
Now, there is one problem. When the button is clicked during design-time, the control is contracted (it's size changes), but the designer is not notified of this change. The selection rectangle remains as if the control size never changed, which is very confusing to the user. It only changes to the correct size after I select something else, and then select it again: At the moment, when the button is clicked it raises an event called Expand. I thought I could have my Designer class listen for that event, and refresh the selection service when it fires. I can get the control the designer is designing simply with the "Control" member.
Now here's the problem: Obviously I need to attach the Expand event using AddHandler, and I can see only one time to do that: in the constructor of the Designer.
So I tried it:
vb.net
Public Class ExpandableGroupboxDesigner
Inherits System.Windows.Forms.Design.ParentControlDesigner
Public Sub New()
[Code].....
1. Can you see any other way to listen for the event? There is no 'control initialized' event or something I can use where I can attach the event as far as I know.
2. How do I refresh the selection service in the first place??
I am having problem setting focus on specific cell in my Datagridview1 . On Form1 when clicking on cell 3 in any row, I am callig a Dialog1. However, when done working with it, and closing the Dialog1, the focus returns to cell 3 in my Datagridview1 . I like to set the focus on the next cell(4) making it the current cell.
I have tryed :
DataGridView1.SelectionMode = DataGridViewSelectionMode.CellSelect
DataGridView1.CurrentCell = DataGridView1.Item(4, e.RowIndex)
DataGridView1.CurrentCell = DataGridView1.CurrentRow.Cells(4)
And few other things, I am always getting this exception: Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.
I have a PaintEventHandler connected to a picturebox via AddHandler.
In PaintEventHandler I have coded this for writing the drawing to PictureBox1.Image:
Dim PictureBox1 As PictureBox = CType(sender, PictureBox)
PictureBox1.Image = New Bitmap(PictureBox1.Width, PictureBox1.Height)
Dim bmp As Image = PictureBox1.Image
Dim g As Graphics = Graphics.FromImage(bmp)
... drawing something ...
PictureBox1.Image = bmp
Everything works fine but after running through the paint event handler and showing the picture on the screen it calls the painthandler again and again. It does not stop.
Replacing the code above with
Dim g As Graphics = e.Graphics
Makes it running. But then I cant save the Image to a file.
I am attempting to copy the value of the TimeStamp in cell A6 which has the NOW() formula into cell A5 Based on a change in Cell A4. The catch is I don't want it to update every time the sheet is recalculated due to updating links in other cells on the sheet. ONLY when Cell A4 Changes. What do I do?
View 2 RepliesI can't figure out why my addhandler is not firing?In the Sub "CreateTagStyle" the AddHandler is not firing when the LinkButton is clicked Is there some reason that addhandlers can't be added at certain points of the page lifecycle?
<%@ Page Title="" Language="VB" MasterPageFile="~/_Common/Admin.master" %>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
[code]....
My add handler is not correct for some reason. I don't know what I have incorrect. trying to add a row to the datatable upon formload. it says that NewM8_CustomersRow is not an event for BA_TruckingDataSet.M8_CustomersDatatable
[Code]
I came across a snippet of C# code which is very useful. I am trying to convert it to VB.NET, but can't seem to.
timer.Tick += delegate { panel.Children.Add(source); timer.Stop(); };
Is it possible to translate this to something similar in VB?
problem with AddHandler with parameters.
i've create a control, here is the code:
Public Class myWorker
Public Event Complete()
[code].....
When using a ReadWriteLockSlim for multi-threading support, do I need to EnterWriteLock when using AddHandler? [code]
View 1 RepliesI am creating a dropdown list in code for a gridview. I want to create an addhandler so I can have access to the selectedvalue. However, here (Rowdatabound) the add handler does not get fired off. How should I go about this?
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
''//------------does not fire off add handler-----
[code].....
I want to set an event handler only if this is not set:
If GetHandlers(MyWindow.Closed, AddressOf MyWindow_Closed).Length = 0 Then
AddHandler MyWindow.Closed, AddressOf MyWindow_Closed
EndIf
I have a number of UserControls that have the same event .
When I use an Object instead of UserControl, I can not use Addhandler.
Here is the simplest example of my problem: In this example error is "TextChanged is not an event of Object"
Dim obj As Object = TextBox1 AddHandler obj.TextChanged, AddressOf text_changed_event I have to use this structure, because in a FOR loop I use some different UserControls as obj. All UserControls have the same event.
Is there a way to use this structure without error?
Maybe there is a way to define a new object that covers all my UserControls.
I have a number of UserControls that have the same event .When I use an Object instead of UserControl, I can not use Addhandler.Here is the simplest example of my problem:In this example error is "TextChanged is not an event of Object"
Dim obj As Object = TextBox1
AddHandler obj.TextChanged, AddressOf text_changed_event
I have to use this structure, because in a FOR loop I use some different UserControls as
[code]....
The addhandler function works this way: AddHandler Button1.Clicked, AddressOf Button1_Clicked, However, I have an unknown object: Dim o as Object, But I can't add handler for this object AddHandler o.SomeEvent, AddressOf SomeFunction, How do I add handler for unknown objects as stated above?
View 2 Repliesbeen banging my head against this problem for days now. Hopefully somebody could point me in the right direction =) I have some button functionality in my Master Page:
Sub Run()
Dim Hbtn As Button = New Button
Hbtn.ID = "hLink"
Hbtn.Text = String.Format("H")
[Code]...
I am creating a dropdown list in code for a gridview. I want to create an addhandler so I can have access to the selectedvalue. However, here (Rowdatabound) the add handler does not get fired off. How should I go about this?
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
''//------------does not fire off add handler-----
[code]....
I have a button in a grid that I created programmatically. The button edits some data in a table using data in a hidden column of the grid that the button is in. Normally I send a hidden field the row data using javascript onclientclick of the button then make the changes to the database using that hidden field. But there must be a way to send the addhandler of the button a parameter. This is the code i have to clarify....
Dim btnedit As New ImageButton
AddHandler btnedit.Click, AddressOf btnedit_Click
btnedit.ImageUrl = "imagesttnEditMini.gif"
[Code].....
I am comfortable with Vb.Net events and handlers.how to create event handlers in c#, and raise events.
View 4 RepliesI'm trying to add a handler, but as soon as I'm targetting a method that has parameters, the handler fails. This is the simple code:
AddHandler App.Current.RootVisual.MouseLeftButtonUp, RootVisual_MouseLeftButtonUp
Private Sub RootVisual_MouseLeftButtonUp(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
[code]....
I'm trying to send values through addHandler. How can I do it.
View 2 RepliesI have the following code to dynamically add handler to my controls
Private Sub HandleMyControls(ByVal Proc As EventHandler)
For Each c As Control In Controls
Select Case IsContainerControl(c)
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There are some subs and functions that help me in what to change and where to loop. My problem is that right now, I can set only .enter event of the control I tried to set parameter as Event but i got an error on that. So, what I want to do is something like this:
Private Sub HandleMyControls(Event as ???????, ByVal Proc As EventHandler)
If MatchControl(c) Then
AddHandler c.Event, Proc
End If
trying to pass an index as a paramater through the use if an addhandler. I know that the signatures have to be the same so its not going to work. What are my options?
Dim n As Integer = 64
Dim tmrTimer(n) As Timers.Timer
Sub startup()
[code].....
I am trying to build an add-on for some software. they are done using vb.net
I want to trigger an event called project selected but dont seem to get the option.
Ive selected the control but the event doesnt appear in the options list i can override the event by doing a Addhandler myControl.ProjectSelected, AddressOf newEvent is there any way in my newEvent method to run the orginal ProjectSelected event ??
the concept of AddHandler/RemoveHandler with a very simple example?
View 28 RepliesMy Code:Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim top As Integer = 0
For i = 0 To 10
Dim inLine As Integer = 8
Dim left As Integer = 0
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