Wpf - Raising Event In Custom Control?
Dec 8, 2009
I'm writing a custom textblock control thats populate hyperlinks and raises event when clicked to hyperlink.
I wrote this code but I got stucked.
My code is :
Imports System.Text.RegularExpressions
Public Class CustomTextBlock
Inherits TextBlock
[Code]....
This code gives error at RaiseEvent Klik(sender, EventArgs.Empty)
Error is : Cannot refer to an instance member of a class from within a shared method or shared member initializer without an expliticit instance of the class.
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Mar 30, 2011
Problem that you may have when dealing with two objects that are raising some events. Here, to make it obvious, I am closing the form, but the problem can be experienced with any other 2 classes event. First, what is the problem !
Let suppose that by pressing a button, you want to raise a custom event, then execute a method and then close the form
In that case, you may use a code similar to this
Event BeepIt()
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
RaiseEvent BeepIt()
[CODE]...
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Apr 7, 2010
i'm trying to learn about user controls. I created a user control that has a textbox and a button. What i'd like to be able to do is when i click the button in the user control, populate a label in the aspx page. I understand that i could just have a button on the page that uses some properties on the user control to get that information.. but i'd like to know how to do it with the button the user control.. the reason for this is the button is just an example.. a learning tool. if i can get this working, i'd likely be putting thing in the user control that might require this kind of passing information. Anyway.. i've found some c# examples that i tried to get working as vb.. but once started getting into the delegates and events..
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Dec 5, 2010
i have the following problam: i have a user control which i want to raise an event from to the page that is using that user control (its a button)anyway my problem started when i wanted to put this user control inside a repeater instead of another button (regular asp:button)anyway i needed to support CommandArgument so that page can use the button,so i created a property:
Private m_CommandArgument As Object
Public Property CommandArgument() As Object
Get[code].....
so after i press the button and the postback happen my raised event dosnt have a value..where should this property be saved in order for it to have a value after postback? view state? how do i add to the the viewstate automaticly?
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Jul 29, 2009
I've created my own ascx control with button inside it. Now I'm using this control inside other control. (In my case it is a webpart). What I would like to do is program button.click logic from my custom control inside webpart
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Nov 25, 2010
I'm trying to use mockling with VB10(VS2010) to improve my unittesting. I have a C# lamda expression example but I don't know how to implement this in a VB lamda expression? v => v.Load += null The full Moq to raise the load event would be view.Raise(v => v.Load += null, EventArgs.Empty) .Net Developer
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Jan 17, 2012
I am developing a form application in VB .Net with a main thread and two other threads that reading values from two serial ports, do some work and raising events to return values when each thread ends.The handlers for the events are in my main thread.Is there any possibility the two threads to raise events the same time or some other event (button click event for example) raised the same time with a thread finished event? What happened then? Is there a way to make asynchronous event raising?
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Jul 16, 2009
I am using Visual Basic 2005 Express and have 8 PictureBoxes on the Form.. When the user Double-clicks any of the Picture Boxes, the path of the image needs to be passed to a Subroutine..As of now, I have a different event for each of the PictureBoxes.. I was wondering if there is a way such that I can use a common event. i.e. if a user double-clicks on any of the picture boxes, the same event is raised ?
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Jun 30, 2010
I have a problem to handle an event on a custom control a have on a form.... So first i made a custom control that is just a groupbox with some labels and txtboxes. That control i add dynamically to my form like this (Baycontrol is the name of my control)
Declaration
Code:
Friend Bay(29) As BayControl
Add the controls to Form
Code:
For Simindex = 0 To 29 'Me.Bays - 1
[Code].....
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May 10, 2011
I've got a page (aspx) that contains a usercontrol (ascx).On postback of the aspx, I'd like to read some control values in the ascx. So upon reading some good articles, I created an event in my aspx that fires on postback.The event handler is in the ascx, and simply writes the values I'm interested in to the viewstate so that the parent page can read them.The problem is my event handler never gets hit, even though I see the event is raised as I step through the code. So my code bombs when trying to read the viewstate (which is empty)[code]Oh, did I happen to mention I'm dynamically loading the ascx? :)
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Jul 19, 2009
I create several Labels using this code:
Dim L As New Label
AddHandler L.Click, AddressOf Labclick
Me.Controls.Add(L)
I know how to do click events but how how do i make an event for it that does something when the mouse hovers over one of the Labels?for example if the mouse hovers over a label it changes text color to RED...when mouse leaves it changes back to BLACK?
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Feb 12, 2010
I am facing issue in following code syntax...
Protected Overridable Sub OnHeaderClicked(ByVal args As ItemSelectedEventArgs)
If ItemSelected IsNot Nothing Then
RaiseEvent ItemSelected(Me, args)
[CODE]...
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Apr 19, 2012
The MyBase.Shown event only gets raised the first time a form gets shown. How do I make something happen every time the form is shown?
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Jan 7, 2009
As it stands, when I click a button to load the data the application lags and looks as though it has locked up although it has not. There are a lot (10,000) of records to load in some cases.
I thought I could just change my status strip text to dispay "Loading database" while it's loading.
So, I raise an event (dbloading) in the "load db" button.click event before calling the procedure to load the data. When that event is raised, I change the status strip text.... but it does not work.
Here's my
Private Sub btnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoad.Click
jnATM = Me.atmJobNum
[Code]....
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Jun 16, 2009
I am having problem in adding click event to my custom label control
Public Class LgxLabel
Public Event LtxLabClick(ByVal sender As System.Object, ByVal e As System.EventArgs)
[Code].....
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Sep 24, 2009
I'm using a third party grid control which I took and inherited to create some custom properties and events to it. Now when I tried to use this custom control on one of my forms one of the Events that I try to use keeps giving me an error and saying that the signature of the event does not match. It's only for this particular event and it doesn't give me the problem on every form I use this control on. To fix the problem, I constantly have to clean/rebuild the project with the custom grid control and then clean/build the project using the grid control. I'm using VS 2005 and the grid control I'm using is called iGrid.NET made by a company called 10Tec.
The exact error I get is below.
Method 'Private Sub iGridFlightInfo_BeforeCommitEdit(sender As Object, e As TenTec.Windows.iGridLib.iGBeforeCommitEditEventArgs)' cannot handle Event 'Public Event BeforeCommitEdit(sender As Object, e As TenTec.Windows.iGridLib.iGBeforeCommitEditEventArgs)' because they do not have the same signature.
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Feb 14, 2012
Currently when i add my control to a form and double click it it adds a sub with the handle control.load to the code but i want it to be control.click when i double click it
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Jan 16, 2010
I had this new idea for a user control Sliding Bar/Panel. See screenshot. So I quickly whipped it up but I've got this problem that I cannot figure out why it does not work. Because I wanted to make it nice and tidy I desided to use a Class (Header) and created a TypeConverter (HeaderConverter)
Code:
Public Class HeaderConverter : Inherits ExpandableObjectConverter
Protected SortOrder() As String
Public Sub New()
SortOrder = New String() {"Text", "Depth"}
End Sub
[Code] .....
and goes to the RaiseEvent but nothing happens Why?
I know I could put properties on the Container control to access the ctnbutton Control that is embedded into the control but I thought this might be a nicer way.
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Jun 20, 2011
I was asked to create an application that has a custom control that acts as a button. I managed to do almost all the requirements except the one for the KeyPress event. The customer wants to click the "Alt + C (for example)" to trigger the button click event in this case for a Cancel button. I did the code and it works fine ONLY when that custom control has the focus on it. But when it loses it, it doesn't. I don't know how to make the form accepts that KeyPress and sends to the custom control. I tried to set the form's KeyPreview property of the form to Ture but it didn't work too.
By the way, I know that it would work by writing the code in the KeyPress of the form but that's not the requirement because the user control will be used as a standalone component for many projects.
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Feb 10, 2012
I have a user control (SomeUserControl), that I am using in a Main Window. I write my application entirely on SomeUserControl, and Main Window is hosting SomeUserControl and nothing else.
Right now I have a shutdown button (in SomeUserControl), that is supposed to close the Main Window. The reason for this is that I do not want anything from SomeUserControl to close the application itself, but to fire an event from SomeUserControl, and Main Window receives it, and Main Window will close the application instead of SomeUserControl.
How do I do it? I am not familiar with the concept of creating and handling custom events, so if someone could explain it in words and in code as an example, I will be very grateful to you!
Edit: Here's my code so far.
(in Window 2)
Public Event CloseApp As EventHandler
Private Sub CancelButton_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles CancelButton.Click
DialogResult = False
[Code]....
I want to close the application when I click cancel in Window 2, but I don't want to do it in such a way that Window 2 closes itself, but by sending some notification to Main Window, and Main Window closes the application.
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Jul 19, 2010
I'm creating an ASP.NET Custom Control for my web application which is basically an ASP.NET Button control contained inside multiple <div> elements (for styling purposes).How can I create a Click event handler for my custom control so that my control acts as an ASP.NET Button?
Ie.
<cc:Button id="myButton" runat="server" Text="Submit" />
Sub myButton_Click(sender as object, e as EventArgs) Handles myButton.Click
End Sub
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Aug 25, 2010
I need a multiline TextBox which is always disabled, but it shouldn't paint itself in gray, but I want to keep its designer choosen color. I previously had the same requirement with an always-black Label (no multiline) and so I inherited from Label like:
Imports System.ComponentModel
Public Class LabelDisabled
Inherits Label
Sub New()
InitializeComponent()
Enabled = False
End Sub
[Code] .....
But this way, neither I can set the "real" Enabled property, I mean the backing field.
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Aug 23, 2010
I made a custom button by inheriting the Button class. When I double click the custom button in Designer, it makes the event handling function for MyButton.Click:
Private Sub MyButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyButton1.Click
End Sub
[code]....
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Apr 27, 2011
I am attempting to test that the event handlers between an interface and controller are wired properly. The system is set up like the example below:
[Code]...
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May 27, 2011
I have created a custom control with an event called "valuechanged" When I try the following line to: AddHandler
ScheduleMain1.ValueChanged,
New
System.EventHandler(AddressOf[code]......
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Sep 16, 2009
I have created a custom control that has a few labels and a button on it. In my main program i dyanmically add this control to a stackpanel. When i add the control i add a few events for it by doing th e following:
Dim newqueue As New UserControl1
AddHandler newqueue.MouseDoubleClick, AddressOf PrintMessage
How would i go about adding an event for the button.click for the button in the custom control?
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Jul 31, 2010
I've read thru Iceplug's tutorial on control arrays and got it working. I tried to add a new event by basically copying his click event code and calling it a doubleclick event. I used the proper addhandler and assigned the correct name to my sub. I have the click event changing the background color to blue and the doubleclick event changing the background color to green. The background color does not change to green. Why?
Heres the tutorial with my new code encased in asterisks ...
Code:
Imports System
Imports System.Windows.Forms
Public Class form1
[CODE]...
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Dec 29, 2011
how to specify a custom icon for display in the toolbox window when you create your own custom control? Something other than the dreaded "gearbox" icon.
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Jul 11, 2011
I have an ASPX Custom Control which is supposed to load it's properties into an internal collection (defined with PersistenceMode.InnerProperty). Here's the ASPX
<cc:CustomControl runat="server">
<Queries>
<cc:QueryTypeOne ... />
[code]...
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Jan 11, 2010
I am using custom textboxes and I need to be able to set the Text on txb1 based on the Text of txb2. I have simplied my code to the following:
Public Class customtextbox
Inherits TextBox
Public Event ControlReset()
[Code]....
So, when txb1 looses focus, if its Text is "fried", then it sets off txb2's ProcessAlert function. I had tried to change the value of txb2 Text in ProcessAlert function, but didnt work, so I tried to get it to raise an event instead, which then tries to set the Text property. However I still cant set txb2's Text property. The Text property seems to be set for the duration of the "life" of the Event handler. When I step through the forms controls within the Event handler, the changed Text value is there, but not outside of the Event handler.
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