Not All Controls In Collection Are Being Copied?
Dec 13, 2011
I'm a bit confused here. I'm copying all the controls from one form to a panel on the main form and for some reason only about half of them copy.
Private Sub switchComponent()
Dim selection As String = TreeView1.SelectedNode.Text
Panel1.Controls.Clear()[code]....
When stepping through the code, serverDic(selection).Controls has 12 elements, but only 6 of them get copied. Next time this gets called, only 3 get copied. Does Panel1.Controls.clear() somehow kill the references?
EDIT: Just to show that there are infact 12 elements in the collection:
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Mar 25, 2011
I have an ASP.NET app with lots of textboxes all over the page that need updating at various points through program execution. These textboxes actually belong to a certain class, so for easy updating I thought I could create a Dictionary(Of string, object) and add the control.ID and the control to it and then for updating do something like this:
[Code]...
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Feb 24, 2010
Im trying to loop through a collection of controls see code:
Private Sub addZeros()
For Each ctrl As Control In Me.Controls
If TypeOf ctrl Is GroupBox Then
[Code]....
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Feb 17, 2010
I often see code snippets for handling each control of a certain type on a form or panel, etc.They always start with For Each ctrl and the do a test for control type.Many .NET users are not aware, as I was not until I tried it recently, that we can LINQ on the controls collection.Below is a simple sub I created for resetting every checkbox on a panel I use as a validator.
Private Sub ResetCheckBoxes(ByRef pnl As Panel)
Dim ctrls as System.Collections.Generic.IEnumerable(Of Object)
ctrls = From c In pnl.Controls Where TypeOf (c) Is CheckBox
[code]....
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Aug 27, 2010
Does anyone know how I can access the FontDialog's controls collection? I would like to disable the Font Style ListBox, set the Font Style's TextBox to readonly and disable the UnderLine and StrikeOut CheckBoxes.
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Apr 15, 2011
Maybe if I knew the right termanology, I could find the answer myself.. I am going to run a fairly long list of "If"s that will determine if certain controls appear on the form or not. In it's simplest form would be:
[Code]...
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Mar 6, 2012
How to get the last instance of label control in List (of Control) using linq?
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Jan 6, 2010
I am writing a simple control translation function that reads an XML file containing control names and their localized text. Within the application, each time a form is loaded, it iterates through every control and tests to see if that control is defined in the XML file. If it is, it then sets the control text to whatever localized text is defined in the XML file.
There are some tests and additional requirements (i.e. nested loops) for TabControl and MenuStrip etc., but the control that is giving me the most trouble is the ContextMenuStrip.[code]...
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Dec 29, 2009
I am trying to add controls to a collection runtime(toolstripmenus to a menustrip) However, when I try to loop through the collection, it says something like: "Collection has been edited. Listing function cannot be done" (it's a free translation since i have a finnish VB)
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Mar 12, 2009
I am trying to dynamically add some css and js elements into an ASP.Net page at runtime, but because this code is used in mutliple controls I need to ensure that the relevant links are only injected once.
Currently I have the folowing code in the OnPreRender event.
Dim head As HtmlControls.HtmlHead = Me.Parent.Page.Header
If Not _useCustomStyles Then
Dim litCustomCss As New LiteralControl("<link rel=" & Chr(34) & "stylesheet" &
[Code]....
Does .Contains look for this instance of an object (which I assume is why this is failing)?
Is there a way to check the controls collection for a specific id? Or am I going to have to write a sub to loop through the existing controls in the collection checking for the id.
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Oct 9, 2009
I have a small piece of code that iterates through the controls collection on a panel (below) Everything works fine until I want to focus on a control that doesn't support the selectall method i.e. a datetimepicker. Is there any way of determining the type of control and not call the selectall method when the type is datetimepicker. All my other controls support it so that's the only one I need to exclude.
[code]...
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Mar 31, 2011
I need a function to be performed on the page load, which uses a stored session variable. I have added the following to my <body> tag.
<body onload="doSomething(event,'<%= Session("StartTime") %>')>
This does work. However, it is causing a problem elsewhere, when I try to add a control to my controls collection:
[Code]....
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Aug 27, 2010
Does anyone know how I can access the FontDialog's controls collection? I would like to disable the Font Style ListBox, set the Font Style's TextBox to readonly and disable the UnderLine and StrikeOut CheckBoxes.
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Jun 2, 2011
I'm trying to make a collection class for buttons to address them as a whole, only I want to design the buttons at design time, and not add/set their properties programatically at runtime. Each button has its own image, so it doesn't seem right to add a bunch of lines of code which assign the properties when they're always going to be the same thing.Is it possible to create the controls at design time and then add them to an array at runtime? I did this, iterating through the buttons on the form and adding each of them to the class below.The problem is that once they're added they seem to be a different instance because changing their positions has no effect on the design-buttons on the form. Essentially i wanted the collection to be a reference to the items belonging to the form.Is that possible or should I be doing this a different way?[code]
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Apr 12, 2009
How can I find a List or Collection of User Controls available within the development enviroment and dynamically add them to a combox by their Name Property. I am looking for something along the lines of:
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Mar 2, 2010
I am trying to make a collection of controls that I can loop through. So I have this code in my form... Dim WizardFrameCollection As New Control.ControlCollection(Nothing)
I then try to add controls to the collection by I get a error "Object reference not set to an instance of an object." WizardFrameCollection.Add(Me.GroupBox1) I am not sure why I am getting this error. Groupbox1 is a groupbox that is on the form.
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Mar 9, 2009
at some points, I need to call the same method on those controls (ex. user presses the clear button on the big control, I want to call the clear f(x) on each of the controls)I thought to toss the controls in a collection, and then be able to handle them something like this:
nextturns out, and I should have realized, methods and properties of controls are not exposed when treated this way. The only thing that can be seen is the stuff that the base class (control, I guess) has.
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Sep 23, 2011
I am using below code to copy a file from one location to other location...
System.IO.File.Copy(Source, Dest)
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Feb 6, 2012
i have created a program using vb 2010 and i want to sell it but i dont know how to make it be uncopyable.I have set to read only and administrator permission etc... but i can still copy it.
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Aug 26, 2009
I want to delete records in table1 once i copied them into table2.
Im using C#, VS08. I had created database:admin.mdf, with two tables, tblOutbox(table1) and tblSend(table2). Here are the codes on how i insert into table 2.
private void Form1_Load(object sender, EventArgs e)
{
try
{
[Code].....
What condition should i use to delete the record? this command is use when i want to delete only one record, But what if many records involve?
cmd.CommandText = "DELETE tblSend WHERE id = 5";
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Oct 7, 2010
Does anybody know an effective way to protect your application from being copied? I 'd like to make my application as shareware for limited numbers of trials and after that the application shouldn't not run anymore on the same PC.
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Dec 5, 2009
Protecting software from being copied?
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Nov 18, 2011
I'm trying to deploy my first program and I've run into the following trouble.The program uses an access database dbUserPractice.accdb. In debug mode, everything works fine.When I deploy, install and run the application, I get a System.TypeInitializationException (which I asked about in a separate thread). The inner exception is the following:
System.Data.OleDb.OleDbException
Could not find file 'C:UsersPatrickAppDataLocalApps2.0DataW8EL4B31.5OL13DJ6BGK.5TNgmat..tion_97baec9c26ea8d1a_0000.000a_bf94ecc77eee8fa0DatadbUserPractice.accdb'.
If I manually paste dbUserPractice.accdb in the directory above, the application runs ok. Why isn't the installer putting the file where the application will need it? The file is part of the downloaded install package (it is in the 'Application Files' folder as 'dbUserPractice.accdb.deploy')
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May 1, 2006
I encountered a serious problem while working withclipboard class in VB.NET.I want to simulate cut-copy-paste operation withmy application and Windows Explorer.User can copy files from Explorer and paste it intomy application & vice-a-versa.My question is-How can I determine if user has copied or cut the filesfrom Windows Explorer? I want to differentiate cut & copy.I am using >> My.Computer.Clipboard<<.
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Mar 3, 2009
Clickonce deployment 'Publish succeeded,' however not files are uploaded to the server, and the deployment webpage does not start, even though 'automatically generate deployment web page after every publish' is enabled.The problem began after copied the application from running on 'XP' and tried to publish from vista.
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Mar 8, 2010
I have an Web application that retrieves some db info and send it out to an html table. All created on the fly in vb code behind. For every post (row) in the db I also fill puts an instance of a Dropdownlist with items read from the db. That means that for every row I read from the database I read the same db info into the Dropdownlist (see the skeleton example below). A lot of overhead I think. It must be possible to create the Dropdownlist once before the loop and copy from that instance in the loop.
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cboCombo2 As DropDownList
Dim i As Integer
[Code] .....
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Feb 26, 2010
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Not System.Windows.Forms.Clipboard.GetDataObject() Is Nothing Then
Dim oDataObj As IDataObject = System.Windows.Forms.Clipboard.GetDataObject()
If oDataObj.GetDataPresent(System.Windows.Forms.DataFormats.Bitmap) Then
[code].....
is fine for grabbing a graphic from the clipboard, but I'm after grabbing a file that's been copied there, either copied from explorer or from an email attachment from Outlook.
System.Windows.Forms.Clipboard.GetFileDropList(0) is fine if it's been copied from Explorer, but fails if it's a mail attachment.
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Nov 5, 2010
Code is below. I am designing this code to transfer a file at a specified time. Right now, I have it sending me an email when it succeeds for test purposes. It will be only when the file copy fails later.
Here's my question: how can I get the program to wait until the file copy is complete to report success or failure? Right now I'm using exists to see if it works, but some other method of checking the file will be built in later. Eventually, this will be deployed to various locations for a bit of automated backup.
[Code]...
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Jan 21, 2012
I have a textbox with exisitng text into which I'd like to paste copied strings. My problem is that when I paste (Clipboard.GetText().Trim), the existing text disappears.[code]...
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Aug 3, 2009
I have a folder called "Documentation".I also have a menu option in my windows form app called "Help" that I want to launch a web browser and load the index.html file within this Documentation folder.To have this folder be copied to the installation directory at time of install, do I just add the folder to my project?How do I code the "Help" menu option to open a web browser and navigate to this folder?
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