I would like to try setting the doublebuffered property of a child control of a form (named Canv). However, it tells me it is protected and therefore I cannot change it, unless I override it.I have had experiences with overriding properties in the past, but only with entire classes. Is it possible to do the same with this particular instance of the Panel, instead of creating a whole new custom class and using that instead?What I am ultimately trying to achieve is to draw ~100 controls onto the panel without having them flicker singularly into view.
I am drawing a bunch of shapes on a form and I want to relegate some of these to a subroutine other than Form1_Paint().The form has the DoubleBuffered property set to TRUE.All the shapes that are drawn by an external sub get overwritten:Code:
In my form I hace a Groupbox1, within Groupbox1 have a Groupbox2, within Groupbox2 have a Textbox1..how to call the Texbox1 from another form? When I use Dim newControl As Control = Form1.Controls(Textbox1.Name) I get nothing value?if I use Form1.Controls(Groupbox1.Name) it can get the Groupbox1
I have a UserControl that contains other controls that I would like to be able to rearrange or resize at design time. So I have a custom designer for the UserControl that inherits from System.Windows.Forms.Design.ParentControlDesigner, and I call EnableDesignMode on the child controls from within the designer. That way, at design time, I can drag and drop the child controls to move them, or resize them. But I can also drag and drop the child controls somewhere else on the form that is outside of the original UserControl. Is there a way I can limit the child controls from being moved or resized outside the UserControl?
I am still messing around with Cntrl/Copy and Paste from a menustrip. Paste is working fine. The copy is working to a certain extent. It will copy the complete text field from one control to another. how do I determine what is the selected text only. My code below:
Private Sub CopyToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs) Handles CopyToolStripMenuItem.Click Dim activeChild As Form = Me.ActiveMdiChild ' Determine the active child form. Dim activeControl As Control = activeChild.ActiveControl
I am using Visual Basic .Net 2005 professional.From what I understand, I should be disposing of any object that is an unmanaged resource. I understand the best way to tell if a resource is unmanaged is if it has a Dispose method. ie: If I type a dot after my object, intellisense shows .Dispose() as one of the options. If it does, it's an unmanaged resource. Is that correct? In that case, pretty much every control is an unmanaged resource: buttons, forms, panels, etc.In the application I am working on I use an MDIparent container form, which contains MDI children forms, which themselves contain Panels, Menus, Groupboxes, etc, which in turn contain Buttons, Textboxes, Labels, Dropdowns, etc.Do I have to dispose of each button, textbox, label and dropdown within a panel before disposing of the panel?
Do I have to dispose of each panel, menu, and groupbox before disposing of the MDI child form?.Or can I just call the Dispose() method of the MDIchild form and the GarbageCollector will take care of all the controls and resources within the form?Watching the "mem usage" in Windows Task Manager seems to be an unreliable way to detect if I have a memory leak. The numbers just keep climbing and falling (mostly climbing) erratically and without any activity performed on the application. Is there some (relatively) easy way to detect leaks?
I have a UserControl named DataGridViewFilterAndSorter that I built using a SplitContainer. In each Panel of the SplitContainer contains a FlowLayoutPanel and in each FlowLayoutPanel contains a LinkLabel.
I have a procedure that accepts a reference to one of the FlowLayoutPanels in the UserControl. I want to get a reference to the UserControl (DataGridViewFilterAndSorter) using the FlowLayoutPanel reference. Currently, I have to use this[code]...
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
I have got a project that i am currently creating that is a basic word processing application. There is the capability to have unlimited MDI child forms open however when you click on change font colour of something similar i only want it to do it in the currently active MDIChild. I have found the Me.activemdichild however i cant then access controls on that form.
I've created a control class that inherits a Panel control. This control then contains two other panels, one of which I would like to be an IContainerControl.I know how to turn the entire control into a IContainerControl but have been unable to do the same to a child control. I've tried in both C# and VB.Net and failed with both.
Does that make sense? I tried searching but didn't find anything that helped, hopefully someone here can get me on my way
I thought I'd embark on a little project, just making a registry editor as the one on WinXP is a little.. Plain and boring, so I thought I'd make my own.I'm having no problems loading the registry into my form, although I'm having difficulty loading the data into a ListBox control.. I can set parents, for example Local MachineDynamic DataPerformance Data..This is no trouble. I know it's possible, but I don't know how to create the following structure [code]Basically, I don't know how to add a child node to the ListBox control.
My application uses an MDI form, and there are instances where the end user will need multiple child windows open at a time. I need an easy way for the user to switch between windows, which made me think of using tabs kinda like Firefox, or like the tabs in the Visual Studio IDE up at the top where you can switch between open forms and code files.
I'm curious if there is a control in .NET that will already do this? I would rather not re-invent the wheel if I can help it. Google has failed me thus far.
In your opinion what API use Spy++ to get the "Rectangle" and "Restored Rect" data of a child control of an external window?I don't think it uses GetWindowPlacement because if I use this API for the main window I obtain the same values of Spy++, but if I use the GetWindowPlacement API to find the position of a control of the window itself, known it Hwnd, I obtain different results as to Spy++ (that are ALWAYS the same results also if I shift the Main window... so I think that are relative data and not absolute data... but they are wrong )
One example: Spy++ : (620, 473)-(792, 505) GetWindowPlacement: (615, 450)-(787, 482) same dimensions... but different pos... and the right pos is the Spy++ pos.
[Code] I have a panel as the base of my custom control and I am adding other panels to it, along with a flow layout panel(myInnerContainer). I know the code above isn't going to work because when I try to add the regular panels to the main control, they will attempt to be added to the flow layout panel myInnerContainer, and cause a circular error. [Code] but intellisense doesn't display anything which leads me in the correct direction for adding only the buttons to the flow layout panel (myInnerContainer).
I've created a tab control and on one of the pages I added a button, but I cannot move the button around with the mouse!? I can change the buttons position within the tab control page using the property Location and I can size the button using the mouse and the button is NOT locked. I even tried creating a new project with just the tab control and it still does the same thing. I can, tho, move the button using the keyboard arrows!
I'm using VS2010 V10.0.30319.1 RTMREL on WinXP SP3.
Well I'm not sure how to describe it so i uploaded an image that has 2 different control box positions.
[URL]
The one on top is set up as Render Mode=System while the other image is set up as Render Mode= ManagerRenderMode
Both applications were developed in VB using VS2005.
Each one has its MDI container and their MainMenuStrip set up..
What property/reason would be causing this? I just created a test program simulating the same case (MDI container with child forms) and everytime i maximized the control boxes appear in the correct position.
I have a bunch of dynamically created controls by the user which I'm storing as a control collection in the session state so I can display them on every postback. Each control that the user generates is a div with other controls inside it. I have a button on each control that will allow the user to either delete the control or duplicate it.
I need a solution to move a child control with in the bounds of a parent control means I had a panel with 300*300 pixels and I had to move a textbox within the panel how?
Using MDI in .net, how do you reference a control on a parent form from a child? Like, if on the parent I have a textbox called txtBox1, what could I do from the child form to read the contents? I've been googling unsuccessfully all day. The closest I've found is
Parent!ControlName.Property
I don't know what the ! is supposed to mean, but I get an error here: Class 'System.Windows.Forms.Control' cannot be indexed because it has no default property.
We have a main form which opens an MDI child form. What we want is to set the focus on a particular control in the child form, namely a telerik textbox. When the form is opened for the first time, the focus is set to the textbox control which has a tabIndex = 1 as expected. If the winodw is closed (and disposed) and then reopened via a button on the tool bar that calls the same code that opens the window when the application starts, no control has focus. We have added lines such as Me.rtxtPatientId.Focus() in the Paint event, load event, and activated event handlers but still cannot get the focus to the control. The code is quite extensive so posting it is difficult. However, here is the section that opens the child window:
if PatientSearchForm Is Nothing Then PatientSearchForm = New frmPatientLookup End If PatientSearchForm.MdiParent = Me PatientSearchForm.Show() If PatientSearchForm.WindowState = FormWindowState.Minimized Then PatientSearchForm.WindowState = FormWindowState.Normal End If PatientSearchForm.Activate() PatientSearchForm.rtxtPatientID.Focus()
If you have a Control contained within another Control and the Child Control has the default Anchoring (Top + Left) AND AutoSize=False (Assuming the control has that Property) changing the Parent Control's Top or Left Padding will not offset the Child Control.If you change the Anchoring of the Child Control to anything other than the default values OR set AutoSize=True, the Control is correctly offset when the Parent Control's Padding values are changed.
I need to determine the child control with focus - I've got lots of controls in panels and other container controls so the ActiveControl is simply coming back as the TOP LEVEL panel I was trying something like this:
I need a tool window to act like a mdi child over a chart control. I can't use mdi because I'm using the krypton control ribbon component and they pretty much use all the mdi code in the background. Anything I do mucks it up. So I need a window to float over another control and be bounded by the real estate of that control.
I am creating a user control where when a user clicks a button a popup window will show up with information. The popup window is driven by a toolStripDropDown so when it shows up it does 2 things
Does not move the other controls on the form around but displays over them That it can show the details outside the bounds of the user control itself without having to reserve the space ahead of time
Here is some code
Public Class Popup Private treeViewHost As ToolStripControlHost Private Shadows dropDown As ToolStripDropDown
[Code].....
Now my issue is as the form moves or resizes the Tooldropdown does not move relative. I understand that. When I try to capture the move event of the user control that event does not fire when the entire form moves. There has to be something I can capture because the controls in the container of the form move relative, what drives that? I tried wndproc but nothing fires during form move unless the form is repainted.
I have a User control having two panels. one at the top border and second at the bottom border of the control.
The panels contain some buttons on the click of which i want to display some forms. But I want thoes forms to act like children of the user control i.e. like MDi Parent - Child (here parent being User control and child being the new forms which would be opening). Unfortunately i've not been able to find any way of do'in so.
I am getting DragLeave Events when dragging from a parent to child control. I would only expect to get this event when moving outside the bounds of a control. How can I implement this?
I've created a form that has a timer control. When this form loads it counts down before running a procedure. Simple.
Now I want to subclass this form in a new VB.NET project to so that another form inherits this form (an it's timer functionality) and runs a different procedure on this new form.My problem is that when I create the form in my new project the timer from the parent form seems to be running and when it's time is up it runs and code and crashes the VS environment.
I've searched high and low but have only found references to making sure the timer is disabled at design time. I've done this on the parent form but in this parent form's Load event the timer is enabled.... the purpose of the form. So when the child form loads it is enabling the timer. How can I work around this? Can I enable the timer from the child form? Timer is not visible when the child form loads so how do I manipulate it?
I have a user control and a panel on it in Dock fill format. Now this is exposed for the user to add on the form. Till this point fine. Now the user sees lot of events for the user control, which I want to actually link up with the panel on the usercontrol, because that is where I want things to happen . Is there any solution to link up the events in few lines of code than calling each event separately? I am also looking to expose only few events than all the base control events.
