Get Visible Controls With Reflection?
Sep 11, 2011
I would like to list all visible controls in a form, I use reflection to do this, I have done what I want, but I have to write code for specifics controls that doesnt exist in the Framework, so i would like to know if there is some code to do that generic for any control (even third party controls).
Private Sub LlenarArbolFormularios(ByVal Arbol As TreeList)
Dim parentForRootNodes As TreeListNode = Nothing
Dim tipos() As Type = System.Reflection.Assembly.GetExecutingAssembly().GetTypes()[code]......
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Jan 29, 2010
Using Reflection is it possible to see some of the code behind the contruction of some of the standard Vb.Net controls?I'm particularly curious, at the moment about the SplitContainer a.k.a. System.Windows.Forms.SplitContainer.I am just curious as I would like to see the code used to construct some of the default controls, or would this have been done in C# , C++ or even assembly language?
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Jun 10, 2011
I have a main form, a separate plugin interface dll and another separate dll. Now this is my problem:I'd like to access the properties of the controls of the main form for manipulation in the other dll.
Example:
MainForm
Plugins.dll
Data.dll
Main form have label control I define properties in the interface Plugins.dll from Data.dll I load Plugins to read the label control from the mainform.The question is how can I do that?
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Apr 16, 2011
When I place a control on a form and need to move it, it becomes invisible when I click the mouse to move . What did I accidently change? I use to be able to see it before.
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Jun 6, 2011
I recently uninstalled an IDE for a motion control system (Delta Tau) that is a visual studio based product. Now when I bring up my Visual Basic 2008 IDE that I'm using to write an HMI for the control system, the properties for controls placed on forms doesn't appear in the properties window. And if I click on properties for a form I get the FileProperties2 information, not the form control properties such as size, location, or color. I am also not able to access the controls in the VB toolbox to place on a form. The controls are grayed out and unavailable. what part of Visual Studio 2008 got broke in the Delta Tau uninstall?
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Mar 26, 2012
I am trying to see all the labels in Me.Controls and when I use:
For Each Control As Label In Me.Controls.OfType(Of Label)()
MsgBox(Control.Name.ToString)
Next
it only shows the labels that have NOT been renamed
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Dec 21, 2009
if I set the property Opacity = 0, a form becomes transparent... but become transparent all it controls, too!how to make transparent ONLY the form and let the controls, labels, buttons etc. visible??
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Mar 15, 2009
I am adding a several controls to a groupbox dynamically, but I can only see one of them. I am changing the location for each one just a little so so they should all be visible. When I count the rows in "dtOptionGroupOption it returns the correct #.
'Starting location for Options.
Dim intOptionLocationX As Integer = 0
Dim intOptionLocationY As Integer = 10
[code]....
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Aug 22, 2011
I'm using a TableLayoutPanel and I want to get the control at a specific position in the TableLayoutPanel. I want to iterate over the rows and columns of TableLayoutPanel but this question applies equally if I just wanted a single control at a specific row and column.Unfortunately GetControlFromPosition(int column, int row) only retrieves controls that are visible (that is their Visible property is set to True). This is no good to me as sometimes I want to access a control at a specific position that is not visible and then make it visible.
I have had to resort to iterating over the TableLayoutPanel.Controls collection, and then get the position of each control using GetPositionFromControl(Control control) or GetCellPosition(Control control) until I find the position I want.(I'm not sure of the difference between GetPositionFromControl and GetCellPosition methods as MS documentation is meagre, but I'll ask that question separately).
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Aug 20, 2010
When I make my form Opacity 0% everything disappears including controls that I know will happen im not dumb ok so I tried another method using Transparency Key I had success BUT my problem there is that when I have a picture box and an image IN the picture box around the image is the Form Background color so lets say I picked Maroon for Form1.BackColor, The edges of my image is Maroon
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Nov 20, 2009
I have a form with six picture boxes on it. Each Picture Box has a button underneath it. When the button in clicked, a "Label" and "Textbox" appears. My question is, how can I close the currently open "Label" and "Textbox", when I click another button. I have a working code below, but it's not efficient. As you can see, I will have to list all labels and textboxes on the form. Is there a way to identify all labels and textboxes without naming them all. [code]...
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Feb 16, 2012
I am having trouble finding a way to make the form transparent but the controls still visible. The only transparency I have been able to get to work on the form is
Me.Opacity = <value between 0 and 1>
but that affects all the controls on the form Is there a way to make the controls not inherit this property from the form? Is there another way to make the form transparent? I have buttons and a checkbox that I don't want to be affected by the transparency at all, and a picturebox that I do want to be able to control the level of transparency. Currently, I'm using a slider bar, and controlling the opacity of the form, but that makes everything on the form transparent. I'd actually like for the form itself to be completely invisible, and for my slider bar to control the opacity of the picturebox only.
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May 1, 2012
if I set the property Opacity = 0, a form becomes transparent... but become transparent all it controls, too!how to make transparent ONLY the form and let the controls, labels, buttons etc. visible??
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Jan 27, 2010
I want my form to be invisible but I want the buttons and list-box to still be visible. So basicaly I want a bunch of floating buttons and listboxes on my screen.
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Dec 30, 2009
But I don't know if i posted this at the right place. I am making 40 textboxes inside a panel. And this textboxes I set it to visible=FALSE. Then I have another textbox named txtNoteam in which once the user will enter a number in this txtbox which is less than or equal to 40, those textboxes will be set to true starting from textbox1 to textbox40 depending on the number entered by the user. Example: user enters 3, then textbox 1 to textbox 3 will be set to visible.
I was successful in doing this except one thing, instead of textbox 1 to textbox 3 will be set to visible, it's the textbox 38 to textbox 40 will be set first. This means it will start from the last textbox to the first textbox instead of from textbox1 to the last textbox.
I need your help on what should I do for this to be able to set it to visible from the 1st textbox to the last textbox or is there any other ways of doing this?
[Code]...
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Mar 18, 2011
I am working on a spreadsheet-like custom control, manually painting all cells according to its bounds and indexes. All is working fine until I populate it to upto a hundred rows (with fixed 6 columns). Basically my sheet expands itself to fit all cells, so to use it properly on a form, I use a panel with autoscroll = true and with my sheet inside. The problem is, the control flickers a lot, which I think is caused by painting ALL of the cells. Is there a way to paint only the visible area.?? So when I scroll down, the control would paint only the visible cells on that area. What I am thinking right now is to not put it in a container, but rather, put a scrollbar in my control. Then that scrollbar would then handle the setting of visible cells, and then my paint event would only paint that visible cells. I am using VB btw, .NET 3.5.. I cant put the code in here cause its separated in different classes(Cell, CellCollection, Rows, Columns, Range, Worksheet, etc.)
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Jun 12, 2012
I have a BackgroundWorker and the DoWork event, calls a function called "JustMe", it executes a loop to make visible all the controls on a panel, but does not work vb.net
Private Function JustMe As Boolean For Each ctr As Control In Panel1.Controls ctr.Visible = True Next Return True End Function Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
JustMe()
End Sub
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Jun 2, 2011
Still using VS 2005. My concept is to use the same form space to display different "pages", like a "wizard" where you click the [Next] button, and the current UI disappears and a new UI appears. I want to "turn off" multiple controls and "turn on" multiple other controls. Example code: -
Private Sub
Button4_Click(ByVal
sender
[Code].....
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Feb 12, 2010
i use a picture control in mdi form .. but when i load child froms then mdi form picture are also show in front of child form...
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Jan 14, 2010
I need to print a windows form which contains radio buttons, checkboxes, and other controls.
Printform doesn't work - even with the scrollable option it only prints the visible screen.
The PrintDocument doesn't work, because I can't add controls to it.
I can't capture the screen image, because the form occupies more than the visible screen.
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May 9, 2012
I am using the Tabcontrol with autoscroll = True feature, when i make hidden controls visible on the tab there position is out of place, one work around for this is to set the scroll position to 0,0 by doing this...
[Code]....
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Jan 28, 2009
I've got a panel - that's in a group box. All of this - with lots of other textboxes on labels - is in another panel (the big panel).I make the big panel visible and not visible based on selections made by the user.This small panel - that's in the group box. I cannot seem to make it appear.Even if I leave it VISIBLE at design time - the objects in it will not appear.Is there some kind of nesting problem that I'm not aware of!
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Jan 25, 2011
I have five menu items that i have created as a user control and placed on the master page. Now i want one of the menu items to be visible only for particular user role and not visible for others. Here is what I did. Its not working though.
[Code]...
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Jul 17, 2009
I'm having an odd problem when making a form visible and not visible and it not continuing to function. Here is what I have happening. I have a main form (frmMain) that is an MDIParent. On this form I have a menu to open a second form (frmCalculate) and populate a listview from Items in the database.
As I click or select items in the listview on frmCalculate the tag is read and data is pulled based on the id stored in that tag and fills in various fields on the form. This works great. However, I also have a context menu attached to the listview that allows me to perform a "what if" scenerio on the items I am calculating. When I select this menu, I hide the frmCalculate and open the frmWhatIf form where I can mess around with values on the item I had hilighted in the listview on frmCalculate. Nothing is pulled from or written back to the database here, all the information is filled in from fields on frmCalculate. It just allows me to look at rising costs and how they will affect my margins.... anyway.
If I then close frmWhatIf, it brings my frmCalculate back by setting its visible propery to true (never closed frmCalculate, just hid it). At this point if I click an item in the listview I get an exception for a null reference. IF however I never hide frmCalculate, I can open and close frmWhatIF without ever having an issue. Why do I lose the functionality to select items just by hiding and unhiding the form? As a test I added two menus to the toolbar on frmMain one called hide and one called show. I then opened frmCalculate with original menu item to populate the listview and selected a few items to test that it was working and then using the hide menu I made the form invisible and the show button to bring it back. This yielded the same exception so without even opening frmWhatIf the problem still occurs.
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Jun 28, 2010
I have placed several PictureBox Images of different colored dots(which represent lights) on an image of a Christmas Tree. I can make the lights randomly flash using a randomGenerator and a Select case statement. However, the code is very long. There are 67 lights on this tree and the code is 71 pages long. There has to be an easier way to do this. So far I have tried the following with two images of lights just to see if it would work and it does not work:
Dim picLight(2) As
Boolean
For intX
[code]....
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Aug 18, 2009
Below is the exception code info. when I try to make form visible for the first time from another form then I get an exception code. something like 'a required variable not set'
Quote:
CODE:
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Sep 23, 2011
I'm wondering if there's a way to use Reflection to inspect properties of a COM object? GetType() doesn't want to return the actual type.
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Aug 25, 2009
I have been trying to use reflection to get at all variables I have in classes. I have a bunch of classes and they all use private fields, with public properties to access these private variables.I have used the method Type.getFields() to get to all the public fields, but it doesnt return anything. It seems to completely ignore properties. If I add some test public variables as normal, it picks these up, however I was hoping to keep using the public properties in these classes.
Is there anyway to force the Type.getFields() to pick up on public properties? I see it has some binding flags, and one for getProperty, however it doesnt seem to work.
[Code]...
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Aug 4, 2010
I am trying to build a test app to test my objects. I want it to get all the classes/modules from a project/exe/dll then display the methods and allow them to be invoked. I can get a list from the running project, a dll or exe. But I am having trouble filtering.
[Code]...
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Nov 10, 2011
I have inherited a large project written in a mixture of C# and VB.Net
The project involves many separate assemblies.
There are hundreds (or thousands) of resources (png files) that have been inserted into the project using the VB My.Resources functionality that I would like to access from some C# code, in a different assembly.
Microsoft has a KB article about this. It includes some sample code, but I can't get it to work (and I can't quite follow the code).
// Gets a reference to the same assembly that
// contains the type that is creating the ResourceManager.
System.Reflection.Assembly myAssembly;
[Code]......
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