Top-level Control Cannot Be Added To A Control?
Aug 5, 2010
I have a form with a panel on it (among other controls). I am trying to load picture boxes into the panel (in an attempt to make a star grid). Using the code below, I get a "Top-level control cannot be added to a control." error on the "Parent = Me.Panel7" line.
Searching for this error, I came across a solution to change the TopLevelControl property of the panel to FALSE....but I then get an error "TopLevelControl is read only".
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
LoadPictureBoxes()
[code]....
View 7 Replies
ADVERTISEMENT
Mar 6, 2012
Public Class b
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code]....
while compiling it i got error like "top level controls can not be added to control"what to do?
View 5 Replies
Jun 21, 2010
I have a program that adds controls on the fly to an auto-scroll panel. When the panel is scrolled (viewing the bottom of the panel for example) and a control is added, it looks like it is added assuming the top left corner of the panel is still at 0,0 when in fact it may be 0,500. To see what I am talking about, create an empty "Windows Forms Application" project and insert the below code into it.
Friend WithEvents Panel1 As System.Windows.Forms.Panel
Friend WithEvents btnAdd As System.Windows.Forms.Button
Dim ButtonCount As Integer
[code]......
View 4 Replies
Feb 24, 2009
i a m using VB.NEt 2003, wat i did is , i tried to bring A FORM into a GroupBox Control by using handling method.Im using in VB 6 i got the expected output.but in .NET i m getting an error msg "cannot add a top level control to a control ". when i degug it comes from the line DirectCast(frmObject, Form).Parent = Me.gropboxso u please reply me ..
View 2 Replies
Apr 11, 2009
I have 2 apps and i want to controll their sound levels externally. Ex. 1 app is sound player and another one is GPS soft. I need to detect that GPS sends sound bits to audio card and at that moment reduce the sound level of audio player application. I would assume that could be done through winAPI but im not 100% sure.
View 4 Replies
Jun 28, 2011
I have to handle concurrency control and I used SqlClient.SqlTransaction with IsolationLevel.Serializable level. In that transaction, I do 3 works:
1. Select the latest updated time from a record of a table
2. Compare the latest updated time with a stored time paramater
3. If the result form comparision is "same" I will update that record
But my problem is, when 2 transactions is run at almost the same time.
[Code]...
View 4 Replies
Feb 5, 2011
how do i control the volume level that the speakers output?
View 4 Replies
Jul 26, 2011
when I add a Control to the List(Of Control) what gets added to the List? Is it the Control or reference to the Control.I have a collection of controls (picture boxes representing notes,comments, icons, etc.), which can be drag and drop into other picture boxes holding read only images. Those controls are never permamently added to those images, they can be move or dispose as needed. I need to save those controls to a file and retrieve it later, however when retrieved, they must be place onto the same location in the image. Saving just the image is not the option, I also need to save all the control attributes.
View 2 Replies
Dec 5, 2010
I am trying to find the current level of zoom in a webbrowser control. I know how to zoom but the same doesn't work for retrieving the current level of zoom. I am trying the following: VB.NET Syntax (Toggle Plain Text )
View 1 Replies
May 6, 2009
What node property tells you if the node in question in a TreeView is the Root Node (i.e. highest parent level)? I want to be able to test a node (True/False) in a node event procedure.
View 2 Replies
Nov 22, 2009
I am trying to create a custom control using vb.net.I have added a image to the user control and the problem I am having is that when I resize the image, the image seems to move as well.I want to be able to resize the user control height without moving the image on the user control.
everytime I resize the user control, it seems to move the image on it as well.Is there a way of leaving the image where it is without moving it as the user control moves?
View 3 Replies
Mar 4, 2010
I am using Vb.net 3.5, An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in System.Windows.Forms.dll
Additional information: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
This exception is coming when control is trying to added into the page i.e Me.Controls.Add(CntrlName). I have registered.Then also i am getting error.Please help me.Its urgent.
View 4 Replies
Apr 22, 2011
Why would the controls not be in the order that they were added. I am adding the controls below, the first one to be added is a label, would expect to see it at the top,but it appears below the other linklabels[code]...
View 3 Replies
May 13, 2011
Okay, so I have some problems with dynamically added pictureboxes. This is the code I have now. When I click on one of the imageboxes, I get teh following error: Index was outside the bounds of the array.
[Code]...
View 2 Replies
Jun 13, 2011
I've created a new tabpage and also added a richtextbox to it:
Private Sub AddTab(ByVal ctrl As TabControl, _
ByVal text As String)
If Me.InvokeRequired Then
[Code].....
I know the name is rigth cause I have printed the name in the create method and I have printed the name string in the code where I try to access it.
So by the looks of it it seems .Item() is not the right way to access the control.
So how to access to dynamically created control?
View 1 Replies
Apr 22, 2010
I am using a .net program. My program is used by few people and it at times downloads updates automatically.Recently I have added a COM control (ocx) in my .net program. Now when I run the program (with ocx in the folder) it gives an error. When I registered the ocx thru regsvr32, it worked fine. So now my program has to register the ocx. Is there any other way to do that rather than using regsvr32. The reason is the regsvr thing will work fine in Win Xp systems but in Vista/Windows 7, which has higher security, I dont know if regsvr will work ok or give an error or will run in elevated more.What should I do ? Should I stick with regsvr32 for all OS or is there an alternative.
View 10 Replies
Sep 9, 2009
I've been working on a project lately, where the user can click on an item in a listbox and then get a picture in the PictureBox1. My problem is that when I added a tab control so that I could have several pages with different listboxes and pictureboxes, it stopped working! When I click on an item in ListBox1, the picture doesn't show up in PictureBox1. Why did the tab control ruin everything?
View 3 Replies
Feb 20, 2009
I have two FlowLayoutPanels in a Form. The first read images from a DIR and expose them generating so many PictureBoxes are necessary. The user can drag an image and drop into the second Panel. All works fine. Now the problem is how can I know the name of the image contained in the PictureBox in the dropped Panel so that I can save it? I tried to recover in a ListBox the name of the images during the population of the first Panel but I don�t know witch may be the reference with the dropped PictureBox.
View 4 Replies
Apr 12, 2012
I have searched the web for code relating to changing the system volume, muting the system volume, and outputing the current level of the volume as an integer, using VB.NET.
All the code that I have found either doesn't work, or is very long.
View 5 Replies
Mar 1, 2011
If I have a winform, may I know how can I control the zoom level of the font in theapplication (as well as the application window itself obviously) by using Ctrl + Mouse Scroll Wheel? I see there is a Delta in the Scroll Wheel event, but not sure how that works.Is there any code sample that I can look into?
View 2 Replies
Jan 19, 2011
how to add dynamic control to dynamically added picturebox?
View 3 Replies
Jan 3, 2010
How do I add an event Handler to a control, for example a textbox, to handle any keypress event?cause I want this textbox(which is added in program runtime) to only accept any convert any small letter to Upper case.
View 2 Replies
Sep 30, 2009
I've created a custom control that I insert into my window with the following code
Code:
<controls:ListExpander Text="Class Diagrams"></controls:ListExpander>
The control in question contains several subcontrols, among others, a list. How can create the setup, so I can specify items that should be added to the list?
Code:
<controls:ListExpander Text="Class Diagrams">
<SomeItem>data<SomeItem>
<SomeItem>data<SomeItem>
<SomeItem>data<SomeItem>
<SomeItem>data<SomeItem>
</controls:ListExpander>
In which case the SomeItem objects should be added to the list in the ListExpander:
Code:
<ListBox Name="lstItems" Background="LightGray">
<ListBox.Items>
// Items should go here
</ListBox.Items>
</ListBox>
I'm quite new to WPF, but I suppose it's something along the lines of creating a dependency collection on ListExpander that takes object of the type SomeItem? I simply want to be able to give the control a few arguments which it can translate into items in the listbox contained within the the control.
View 4 Replies
Nov 19, 2010
I'm adding multiple combobox controls to a form dynamically, but am having a problem with one of the event handlers. The first event handler I've added (for the Leave event) fires, but the second (for the TextChanged event) does not. I've tried reversing the order when adding the handlers and I get the same results (TextChanged does not fire). Here's a code snippet for adding the controls, and the code for the events. I've added a breakpoint while testing to verify - but it never hits the code.
Dim cbo As New ComboBox
cbo.Name = "cbo" & fldName
cbo.Tag = fldName.ToUpper
cbo.Top = rowtop
cbo.TabIndex = tabOrder
cbo.DropDownStyle = ComboBoxStyle.DropDown
[Code] .....
View 3 Replies
Sep 15, 2011
I am trying to create a program, where the user click a button and this will add a custom control and then drag and drop them on the form.
What I want to be able to do is add multiple controls (by clicking this button) and for them all to have the same events. So basically they can add as many as they like of this control and then click on it and drag it anywhere.I know in vb6 there was the use of the control index but I am not sure how to do this in Visual Studio 2005?
View 1 Replies
Sep 26, 2011
At some point in the past, I have added a TabControl1 to my Form in design, now I can't find. I need to view it so I can make some changes. I have looked in the 'Document Outline' and is not there as well. However, the control must be somewhere because it works fine when I run the program.
View 2 Replies
Oct 3, 2011
I need to know what files and folders must definitely be added to source control, and what files/folders can be left out.
I know I can leave out bin/ and obj/, along with the .suo file since it's user-specific, but what about the rest of the tree?
FWIW, here's a one form + one module project:
Directory of C:ProjectsMyAppWindowsApplication1
03/10/2011 15:04 3.040 Form1.Designer.vb
03/10/2011 15:04 5.814 Form1.resx
[Code].....
View 3 Replies
Feb 8, 2011
I have created a User Control in VB 2005 that adds other controls dynamically. This is a fairly simple test project, with checkboxes added to the control at run-time. Here's the user control:
Public
Class UserControl1
Public x
[Code]......
Then I built the test control and tried to added it to the Toolbox. When I did this--i.e., browsed to the dll and double-clicked it, I got the errror message:
"There are no components in ... that can be placed in the toolbox."
Is it even possible to add a User Control to the Toolbox without compile-time components?
View 5 Replies
Apr 10, 2011
I do a lot of programming in VS 2010 on my Windows XP Pro PC. Recently I tried testing my software on a Windows 7 Home PC. For some reason, all of the controls on my forms are slightly misplaced. I also get a bunch of unhandled exceptions I don't get on my pc. For example, one exception said it couldn't access a registry key. Another said it couldn't find the part of a path (it didnt specify which path). What's up? Why is it doing this? My Win XP PC tricks me into thinking my apps are bug free. Guess not.
View 13 Replies
Mar 5, 2012
I am adding controls to a page programatically in the code behind. I add an asp:Label and set it's Text value. I add an asp:TextBox and set it's Text value. Both Text values are returned in the Response and displayed in the browser. All fine so far.
The user performs an action that causes a postback. I re-load the dynamically added asp:Label and asp:TextBox. When the Response is returned to the browser, only the asp:TextBox Text value is displayed. The asp:Label Text value is not. If I inspect the HTML I can see the asp:Label control (rendered as an HTML span tag) but no value.
How can I get the code to automatically re-load the Text value of an asp:Label on each postback? Why is the behaviour different for an asp:Label and an asp:TextBox? I do not want to have to manually re-set the Text value on each postback.
Here is some code similar to what I am doing (placeHolderNameplates is an asp:PlaceHolder control on the aspx page): Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
If Not Page.IsPostBack Then
[Code]...
View 3 Replies
