Me.control.InvokeRequired Property Means?
Aug 25, 2009Me.datagridview.InvokeRequired property means in vb.netadil
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What The First Line Of Each Property Means
May 5, 2009I have been given the following code that I want to change to VB however I dont understand the first line of every property:
1<ConfigurationProperty("mailSubject", DefaultValue:="Mail from TheBeerHouse: {0}")> _
2 Public Property MailSubject() As String
3Get
[code]...
How Does The Program Know That The Public Property X And Y Means The Coordinates Of The Object
Nov 9, 2011I've got a piece of code of a class. When initialised a new object is made on a picturebox. But what I don't know is how does the program know that the public property x and y means the coordinates of the object?
[code]...
Add InvokeRequired / BeginInvoke(Delegate) To Avoid 'Control'
Jun 27, 2011I have a (legacy) form where I had to add the InvokeRequired/BeginInvoke(Delegate) to avoid the "Control control name accessed from a thread other than the thread it was created on." exception.This seems to work fine but there are some scenarios where the BeginInvoke is not calling the Delegate (which I can tell from the output log). [code]
View 1 RepliesCNC Control Program, Based On A DLL - Acces All Functions By Means Of Softkeys ( F-Keys At Top Of Our Keyboards )
Apr 8, 2009I'm working on a CNC control program, based on a DLL that someone else wrote. No problems with that sofar, as i get good support from the writer.
The problem i do have to tackle is the following: I want to acces all the functions by means of softkeys ( the F-Keys at the top of our keyboards ) when the program starts it shows the Main menu softkeys ( F1-F12), and each F-key has a function assigned to it, some will make the machine move, others will show another menu, or a fileopen/save dialog, depending on the chosen keys.
All works fine and handy-dandy, except for the F10 key, it seems to be "Sticky", when i press it, the program will not react to any other key, only the F10 key can get it back in "normal state" accepting every key with a function assigned..
How to "unstick" the F10 after pressing it?.. because pressing F10 now, means no other key will do anything, and that may become dangerous, when the machine is moving and it must be stopped..
InvokeRequired Not Working?
Feb 6, 2011This code works fine in VB 2008 attempting to redo the program in vb2010:
in the GuiForm:
the following is declared in formgui:
Private Delegate Sub UpDateGSLDelegate(ByVal rpn As Integer)
Also the following sub is also in formgui:
Public Sub updateGSLDisplay(ByVal rpn As Integer)[code]....
"UpdateGSL", in turn, will be called from any subs running in another module in a separate thread.The purpose is to update one or more labels on formgui based on the "rpn" variable.now the program will just hang at " Invoke(New UpDateGSLDelegate(AddressOf UpDateTheGSL), rpn)" in the "updateGSLDisplay" sub. no error messages, just stops.also I'm now using the " Dim t1 As Task = Task.Factory.StartNew(Sub()" way to starting a new thread in case that is revelant.what has changed from 2008 to 2010 to cause this. Just started trying out vb 2010? How can I fix this in 2010?
I looked at this page: http:[url]...aspx but it doesn't say anything or maybe it does and I just didn't pickup on it.
Me.InvokeRequired In A Module?
Jun 28, 2010I am using the under given code in a module and I am getting an error ['Me' is not valid within a Module]
[code]...
Begininvoke And Invokerequired Usage?
Dec 1, 2011instead of using if control.invoke required in a procedure can I just call the procedure with begininvoke?I have, possibly, the following:
Private Sub UpDateTimer_Elapsed(sender As Object, e As System.Timers.ElapsedEventArgs) Handles UpDateTimer.Elapsed
UpdateTime()
If MicActive Then
PTTCancelTime += 1
[code]....
Learn InvokeRequired And BeginInvoke?
Sep 5, 2010where is the best place to learn InvokeRequired and BeginInvoke.
View 4 RepliesVS 2008 ListView InvokeRequired?
Dec 9, 2009I had a question about some logic of the InvokeRequired with a ListView. I have the following
vb.net
Public Sub ListviewSub If ListView.InvokeRequired = True Then Dim t As New MethodInvoker(AddressOf ListViewSub) picCurrent.Invoke(t) Else RunSub() End IfEnd Sub
[Code]...
VS 2010 InvokeRequired, But Invoke Not Working?
Feb 3, 2012I read Accessing Controls from Worker Threads and implemented this
Private Sub myExplorer_Close() Handles myExplorer.Close
If Me.InvokeRequired Then
Me.Invoke(New MethodInvoker(AddressOf myExplorer_Close))
[code].....
InvokeRequired Keeps Returning False When True Is Expected?
May 24, 2012I have the following test code. It does nothing useful, but it's there for me to understand VB:
Imports System
Imports System.IO
Imports System.Diagnostics
[code].....
Set The Properties Of A Base Control So That Instances Of That Control Inherit The Property Settings
Dec 11, 2009I would like to be able to set Control visual properties such as color, boarder, flat style, etc. on the base class of the control so that as I add new instances of the control, each instance inherits the visual properties of the base. I have tried using Application Settings but it appears as though I need to reference an application setting manually each time I add the control to a form. This is a Windows Form question.
View 4 RepliesVS 2010 Changing Control Parent Property Changes Control Location Position?
Feb 16, 2011I'm trying to make a program with transparent labels over pictureboxes and when I set the label Parent to the PictureBox the position of the label changes.
View 2 RepliesOrder Of Creation Or Adding To The Parent Control Determines Whether Or Not A Control's Dock Property Supersedes Another's
Jun 17, 2010i frequently have troubles with the dock property. it seems that either the order of creation or adding to the parent control determines whether or not a control's dock property supersedes another's. e.g. a control with the dockstyle fill will overlap with another docked control on the same parent. does anyone know what the rules are to determine how docking will behave; particularly in dynamically created GUIs?
View 2 RepliesBind Control.Text Property To Control Position In FlowLayoutPanel?
Jun 6, 2012Is there a way to bind the text property of a control to an expression? I have a user control that I add to a FlowLayoutPanel. You can see I have 4 controls in the FlowLayoutPanel below. The first control is a LinkLabel and the other three are my user controls which are numbered 1, 2, & 3. I'd like to bind the label that shows the 1, 2, or 3 to the user controls index within the FlowLayoutPanel.
If I happen to remove the 2nd user control I want the 3rd user control to now display 2. I could use the FlowLayoutPanel ControlAdded or ControlRemoved events, but wanted to see if I could do some binding first.
Bind Property Of User Control To One Of The Parent Control's Fields?
Dec 30, 2011If I need access to the value of a user control's property BEFORE PreRender, would I need to base the custom control off of one of the preexisting data controls (repeater, listview,etc.)?One of my user controls features a gridview control that is configured based on the user control's properties on which it resides. Several of the key properties alter the SQL Statement for the underlying recordsource. I'm now in a situation where the property that sets the WHERE statement for the SQL Statement needs to tied to a value in the user control's parent FormView. Think of the formview as displaying a customer detail record. The user control takes the customer's account number and then displays data from a related table such as Customer Contact Names. Since the gridview is created before the control's prerender event, working within the prerender event doesn't seem efficient.
View 1 RepliesInvokeRequired Returns False When UpdateLabel Function Is Called From A Different Class?
May 10, 2012I am working with tasks, so I've got the following code to update a label on my form:
Private Delegate Sub UpdateLabelDelegate(ByVal s As String)
Public Sub UpdateLabel(ByVal s As String)
If Me.InvokeRequired Then
Me.BeginInvoke(New UpdateLabelDelegate(AddressOf UpdateLabel), New Object() {s})
Return
Change Property Value When I Change Name Property Of Control In Desgin Time?
Mar 10, 2010I inherits textbox Control and I added some new properties to it .one of these properties value i want it to change it's value in desgin time when i change Name property of the new textbox
Public Class NewTextBox
Inherits TextBox
Private _txtSubName As String = String.Empty
That is the property for set or get SubstringName of Textbox
Public Property SubName() As String
Get
Return _txtSubName[code].....
that's the property i want to change it's value when i change Name property of the control.i tried to overrides Name property but it's not overridable also i trieds to overloads it but it doesn't work in desgin time.Here is something i tried but it's wronge.
Private _txtName As String = ""
Public Overloads Property Name() As String
Get[code]......
Dim Array() As String Means And What Dim Array As String() Means?
Nov 20, 2010What Does : Dim Array() as String means and what Dim Array as String() Means?If I pass a array to function like below:Public Sub Array_AddSomething(ByVal strEntry As Object, ByRef strArray() As Object)
[Code]...
What Does () After Each One Of These Declaration Means Are They Arrays
Nov 19, 2009i am still new in VB.net if someon can just help with these codes below: [code] what does the () after each one of these declaration means are they arrays?!
View 2 RepliesWhat Exactly Does 'calling Code' Means
Dec 13, 2010What exactly does the "calling code" means? A method to do an action?or else.,
View 6 RepliesDataset.clear Method - What Does It Actually Means
May 13, 2009I think I've misused this method and would like to know what it actually does.I 've looked it up on msdn forum and found this
[code...]
What does it mean by removing all the rows in all tables? Is it the datagridview table? When it says "removing", does it mean that it deletes everything?
The reason I misused it is because I thought dataset.clear means it flushes the record held in dataset.
When I click on the add new icon on bindingnavigator, a new form will appear, which allows me to insert data
[code...]
when I close the insert form, the parent form will be activated and datagridview will display the new record I just inserted. I thought the dataset.clear method helped display the new added record but then I realised I could do without the dataset.clear method.
[code...]
VS 2010 Anybody Know What 'Long' Type Means?
Apr 11, 2011I saw something really strange today, that I have not seen before.I saw a variable declared as:Dim a as Long? I am obviously familiar with the Long datatype but what is Long?
View 4 RepliesDelete A Certain Row By Either Double Clicking It Or By Means Of Another Form?
Feb 21, 2010how do i delete a certain row by either double clicking it or by means of another form.
View 2 RepliesMake A Facebook Application For Messages Purposes Means From That App?
Apr 30, 2011i want to make a facebook application for messages purposes means from that app i want to send and receive messages only?
View 11 RepliesTrigger Event Whenever Seconds On Stopwatch Change That Means Every Second?
Mar 6, 2009Is it possible to trigger event whenever seconds on stopwatch change (that means every second, but it has to be synchronized with seconds)?
View 6 RepliesVS 2005 E.Handled = True Means We Can Enter A To Z And A To Z In Textbox?
Nov 17, 2009Private Sub TextBox4_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox4.KeyPress
If (e.KeyChar < "A" OrElse e.KeyChar > "Z") Then
e.Handled = True
End If
End Sub
If e.Handled = True means we can enter a to z and A to Z in textbox.If e.Handled = False then what it means??
Does Changing Generic List Capacity Means Copying Contents?
Mar 31, 2009If I increase the capacity of a given list, or add elements until count>capacity, does this mean the program is actually copying the entire list's contents to a new space in memory (similar to redim preserve with arrays)? If so, than I have really been hurting the performance of my lists, as before I was inserting and adding without a second thought. This seems a strong restriction on the dynamic abilities of lists.
View 2 RepliesWhat This Line Means - Inherits System.Windows.Forms.Form
Mar 20, 2009What this line means? Inherits System.Windows.Forms.Form
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