Get MouseWheel Events With A UserControl?
May 23, 2011
When I look on the Internet I find many want to know how to get MouseWheel events with a UserControl.I'm getting scrolling with the mouse wheel and don't know why.It doesn't seem to be the default since I have other usercontrols that do not respond the the mouse wheel.In one UserControll I find if I move the mose wheel the contents moves. Actully moves too much for good viewing.I've searched the code for "Wheel" - no hits. Also for e.Delts - no hits. Finally I tried:
[code]...
Commented out as shown I do not get the unwanted mouse moves.If I remove the apostrophe I do get them.
Questions:
Is it OK to not call the Base sub in some cases?How do I find out if it is OK? (For example I don't imagine you'd want to not call it in New()Secondly and most important, What is going on? Why and I getting scrolling with the wheel in a Usercontrol and not getting it in other UserControls?
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Mar 4, 2009
I have a usercontrol I created. I added a panel and a vertical scrollbar to the right of it. I'd like to be able to scroll it with the mousewheel. The problem is there doesn't seem to be any events that fire on mousewheel. If I take the panel off then the usercontrol has focus and it will fire on mousewheel in the form. But with the panel on it doesn't seem to fire the mousewheel event of the panel, or the usercontrol within the control or even on the form. The best solution would be to have an event fire in the usercontrol but I'd even accept an event on the form and feed it back into the usercontrol.
I'm using vb.net and vs2005 if it matters.
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Mar 4, 2010
Is there any way to determine if the mouse scrolls up or down using the Mousewheel handler on a sub? [code]I want to be able to adjust the value of userzoom up or down according to if the mouse is wheeled up or down.
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Feb 25, 2009
I would like some code to execute at the "preload" stage of my usercontrol's lifecycle. However the preload event is only available on the Page object. So, I added the following method to my usercontrol:
Private Sub Page_PreLoad(ByVal sender As Object, ByVal e As System.EventArgs) Handles Page.PreLoad
However, I know get the compile error: "Handles clause requires a WithEvents variable defined in the containing type or one of its base types".
As the Page property is inherited from UserControl I don't see how this can easily be done.
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May 2, 2011
I have a winform with a wpf usercontrol on it (ElementHost1). The usercontrol contains only a button. How can I know when the wpf button has been clicked in my winform? How can I "redirect" the events from wpf usercontrol to winform?
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Jan 15, 2012
A form's key events will fire when you press a key. Place a control on that form and it won't happen any more because that control has focus. There are exceptions to this however as you will see if you place just a h or v scrollbar on the form. The key event will fire because the scrollbars can't receive focus as is demonstrated by the following
Private Sub ScrollBar1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles VScrollBar1.GotFocus
Debug.Print("Scroll GF")
End Sub
[code]....
So I've made my own special scrollbar usercontrol and i can't figure out how to have it leave the key events alone. I'm pretty sure that the problem is that my usercontrol can receive focus at the moment.
I found that the way of doing this is "SetStyle(Windows.Forms.ControlStyles.Selectable, False)". I put that in the new event of my usercontrol and now it looks like this:
Public Sub New()
' This call is required by the designer.
InitializeComponent()
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May 26, 2009
I've created a VB.Net ClassLibrary with a UserControl in it. I can load it from an HTML page and call the methods that I created. This works as expected. I've tried several examples for how to raise an event from the VB code to the js caller, and none of them seem to work (I'm using IE7).
[Code]...
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May 11, 2010
limit the default events, properties and methods exposed from a UserControl so it only displays to the developer the new events etc that I code myself.What i mean is I have created a UserControl with a panel and 5 buttons, written 1 Public Eventonly at this stage, I have placed an instance of the control on a form in a new project, but in the drop down menu that comes up after say (myUserControl1.), there is a massive list of options, I don't want those to appear.
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Dec 7, 2009
I am trying to make a small control that has a picturebox and a few labels that can be dragged on the form it is placed on. The control was easy, and I can drag it fine when the mouse is down on the control, where there are no other controls, like not over the picturebox or labels.
When i try to click and drag the user-control and the mouse is on the picture box or labels of the control the mouse down event is not detected. I am hoping someone can tell me how to pass the mouse-down event from the controls on the user-control so the form I place it on detects the mouse down even no matter where on the control i click.
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Feb 18, 2011
When i use my UserControl in a project my Mouse Enter & Leave events aren't firing, i assume i fix this with a raiseevents in my usercontrol. However when i try to do this it says something about "cannot raise base event from derived class".
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Jan 31, 2011
I have MainLayout.master that has UC_Menu.ascx on it. I have a page named Customer.aspx that uses MainLayout.master. Customer.aspx also contains a UserControl named UC_Details.ascx.How can I have UC_Menu.ascx call a function that is in UC_Details.ascx with this scenario?
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Jun 12, 2011
I have a Windows Form frmMain() holding seven more-or-less unrelated UserControls, ucFlopsy", "ucMopsy", "ucCottontail", etc...I say "more-or-less" because each of the seven UC has three similar public read/write properties:
IsLocked (a boolean indicating if the following two properties are "Locked")
IsLockedID (if IsLocked=True then IsLockedID is an integer)
IsLockedName (if IsLocked=True then IsLockedName is a string)
[code].....
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Feb 20, 2011
I can send global mouse click and mouse move, but how can I send a global mousewheel that I don't know which window or control was focused? Is that something doing with SendMouse?
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Mar 28, 2010
the MouseWheel event triggers 3 times every time i scroll ... this i believe is because i have my wheel set in windows to scroll 3 lines at a time but i am updating a "zoom" and only want it to trigger 1ce per wheel movement any ideas?
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Apr 9, 2011
How do I code to scroll the panel using the mouse wheel when the mouse pointer is over the panel using the actual scrollbar?
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Oct 17, 2010
i created a datagridview whcih i am populating from a DB table.unfortunately i had to cancel the scroll bar's and lost the ability to scroll down using the mouse wheel.i was able to create a new handler to handle mouse wheel Under the form load event [code]but i still can't scroll down, and i am a bit lost.
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May 17, 2009
I have a Panel set to Auto Scroll and a Picture Box inside of the Panel that's set to Auto Size. I can use the scroll bars, but why wont my mouse wheel scroll the panel up and down?
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Jan 24, 2010
how do I disable the mousewheel scroll for a combobox. alternatively I don't mind if I can make it keep its original text without actually disabling mousewhell scroll
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Apr 6, 2010
How can I let the user still scroll with their mousewheel when scrollbars in my webbrowser are disabled?
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Aug 16, 2011
How do you move the selected row to the next row using the wheel mouse in a datagridview?
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Apr 18, 2011
Is it possible to get the MouseWheel event from an Interoped ActiveX Control?
I have a DXF Viewer (with measure) control I wrote in VB6 that is quite frankly... Huge. It would take an inordinate amount of time to rewrite the whole thing and supporting tools in VB.NET. The MouseWheel event is used to Zoom in and Out. The control has a MouseWheel_Input() method to accept MouseWheel data from the host.
I added all the VB6 Mouse events, the Enabled Property, and The ActiveControl Property in VB6. Recompiled and registered the control on my VB.NET development machine. Added the control to my new VB.NET project and verified it has a focus method.
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Sep 16, 2011
how to make the preview scroll (smoothly) with the mousewheel?
Private Sub print_preview_MouseWheel(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles print_preview.MouseWheel
If e.Delta............???
End Sub
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Jul 11, 2011
I have a Windows Form that contains a custom control container as a UserControl. For the sake of this question, this custom control container is called Dashboard. This container called Dashboard contains numerous other controls depending on their permissions. I need to raise events that are contained on these controls through the Dashboard control and over to the Windows Form.
How can I bubble up the event? I'm using VB.NET for this project, but can convert C# into VB.NET.Also, to complicate matters, the main Windows Form is a VB6 project. So, I'm using the InteropFormsToolkit to accomplish this.
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Jan 19, 2011
I have two UserControls on a MasterPage. DataEntryUC contains several TextBoxes and DropDownList. NavSaveUC contains navigation buttons. When the user clicks on a navigation button, I will be saving the data entered into DataEntryUC from the NavSaveUC UserControl.
I have a couple of tables in my DB that contain stored procedure names, control names, control types, SqlDbTypes, etc.... that correlate with DataEntryUC.
How do I reference a text box that is on DataEntryUC from NavSaveUC?
I have been working on the following code from NavSaveUC with no luck.
Dim MyControlName = "txtFirstName"
Dim MyControlType = "TextBox"
Dim MyStringValue as String
[Code]....
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Mar 22, 2012
I have a usercontrol that has a main form and calls another form within the usercontrol to get some data from a database that allows the user to select some items from a CheckedListBox control on the sub form. I want to pass the selected items from the CheckedListBox back to the main form and display the results there. I have a public property called DBList of type List(of String) on the main user control. If I create a reference to the usercontrol form the second form within the usercontrol I get a new instance of a user control. All I want to do is set the property on the usercontrol and close the secondary form. How do I reference the usercontrol from the form within the usercontrol?
Code in UserControl:
Public Property DBItems() As List(Of String)
Get
Return DBItems
[Code]....
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Aug 14, 2009
I'm developing User Control. It have many picture box and I use MouseWheel event on every picture box. Why MouseWheel event work only after every picture box was selected?
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Dec 2, 2009
I've dynamically added 20 pictureboxes to a panel and would like to see the panel scroll when I use the mouse wheel. To implement this I have tried to set the autoscroll to true on the panel control. Here is the code.
For i As Integer = 1 To 20:
Dim b As New PictureBox()
b.Image = Nothing
[Code]....
It works for "button" control, but not for the "picturebox" or "label" controls?
How can I implementthe scrolling affect using 'mousewheel'?
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Oct 13, 2011
I have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:
[Code]...
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Aug 2, 2009
I want to make Keybord events and mouse events for learning and educational Purpose.
1. In Form any object like A "picture box" move by Arrow keys .
2. Picture Box Contain many Picture i want change Picture With next and Previos By Arrow keys.
3. I contain Voice of alphabet in Mp3.When i Press any button in textbox then its work.
4. Mouse Pointer Change My Own.
5. I click any Object or any thing By mouse its noice clicking sound like Tik Tik Tik.... Question No 3 is very hard to do . but not im possible
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Sep 25, 2011
I just discovered the joys of UserControl's and I was wondering if it is possible to populate the usercontrol with data from a database in the UserControl's Form.Load event instead of the form the userControl is placed on. I feel it would make using the control a lot easier if it just populated itself without anymore code.I tried it with a ListView but it gave me a bunch of errors, so I didn't know if it had to be done a certain way or if it was just one of those things that doesn't work no matter what.
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