VS 2008 String To System.Windows.Forms.Control?

Dec 9, 2009

I got an error that i cant convert string to System.Windows.Forms.Control and i was wondering how could i do it this is the code that contains error:

If ResultRichTextBox.Contains("Text") Then

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Implicit Conversions From 'System.Windows.Forms.Control' To 'System.Windows.Forms.Webbrowser'

Sep 8, 2010

I have the code which checks if there is a selected tab

Private Function GetBrowser() As WebBrowser
If TabControl1.SelectedTab IsNot Nothing Then
For Each c As Control In TabControl1.SelectedTab.Controls
If TypeOf (c) Is WebBrowser Then
Return c

[Code]...

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VS 2008 Error 1 Operator '&' Is Not Defined For Types 'String' And 'System.Windows.Forms.Comb?

Sep 2, 2009

with this code dont know wht its not working source = wc.DownloadString(String.Format("http://" & cboHSearch & "/cse?cx=013269018370076798483:gg7jrrhpsy4&cof=FORID:1&q=" + cboEngine.Text + "&sa=Search", Me.cboEngine.Text.Replace(" "c, "+"c), resultCounter))

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Cast A System.string To System.windows.forms.form?

Feb 23, 2009

I want to cast a system.string to system.windows.forms.form

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Forms :: String Cannot Be Converted To System.windows.forms.label

Mar 31, 2010

I am writing a program for my A-level coursework But for some reason I got this build error this has never occurred to me before, I have no idea why I can't use string for the name of my form.

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VS 2010 String Conversion - EValue Of Type 'String' Cannot Be Converted To 'System.Windows.Forms.TextBox'

Apr 8, 2011

I'm trying to code a program but this error repeatedly shows up and I can't for the life of me figure it out EValue of type 'String' cannot be converted to 'System.Windows.Forms.TextBox'. It appears in relation to this code

[Code]...

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'image' Is Not A Member Of 'System.Windows.Forms.Control'

Oct 18, 2010

I have several pictureboxes in my form with names as "stop0", "stop1", "stop2" ... upto a the number of checked items in my checklistbox. My aim is to use a for-next function so that the program should use for all these pictureboxes a specific image. here is the code I made so far:

Dim a As String = selectedbutton.Replace(" ", "_") & "_"
Dim c As String = ""
For n = 0 To chklstStops.CheckedItems.Count

[Code]......

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Control Can Exercise Over A System.Windows.Forms.FlowLayoutPanel?

Oct 23, 2009

I've been working for several days on a GUI where a lot of individual data elements need to be displayed side-by-side and wrap to the next line when they overflow; the goal is to not have to explicitly design an individual 'row' element with a set number of elements for this purpose. The FlowLayoutPanel seems great, except...

I need to be able to determine how many elements are on each line (dividing the width of the control by a predetermined value indicating width of child controls does not work); I need to be able to determine how many elements will be on each line (I may need to put 4 elements on line 1, then auto-wrap, then 8 elements on line 2, then auto-wrap, then as many elements as can fit on line 3 before autowrap, then 16 elements on line 4, etc); and finally I'd really like to put a 'line header' at the left margin and a 'line footer' at the right margin, where for example the line header contains a line number and the line footer contains the number of elements on that line.

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SelectedIndex Is Not A Member Of System.Windows.Forms.Control

Mar 8, 2010

I am trying to read values from textbox controls and combobox controls on a form. Reading the values from textbox controls is working fine but I cannot read from the 3 combo boxes. Here is some simplified code of what I am trying to do.

[Code]....

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VS 2008 : A First Chance Exception Of Type 'System.InvalidOperationException' Occurred In System.Windows.Forms.dll

Feb 12, 2011

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll It displays in my Immediate Window when i run my program, I'm using a text reader to read a number of XML files using background worker...most the time it stops so something is wrong but sometimes it works fine.

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Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'

Jun 12, 2011

Unable to cast object of type 'System.String' to type 'System.Windows.Forms.TextBox'.

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VS 2005 How Safe Is The System.Windows.Forms.Webbrowser Control

May 9, 2012

If you are interested, I am doing this because I do not like having to drag and drop my browser etc. I just right click the URL in Chrome and select (Play on My TV) a customized dropdown item, at which point my Player finds the TV, opens the URL, maximizes itself and plays the content

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Cannot Import System.Windows.Media.Imaging And System.Windows.Forms Or System.Reflect?

Mar 16, 2009

With the following imported namespaces in my project :

Imports System.Windows.Forms
Imports System.Reflection
.. I cannot add..

[code].....

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Operand & Is Not Defined For Type String And System.windows.forms.label

Feb 27, 2012

bases is a variable and outs is a label with a number in it. Gives an error --- operand & is not defined for type string and system.windows.forms.label Bases="ooo" and I want to
append a 0 or a 1 or a 2 to get "ooo2" for example.

[Code]...

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Deep Clone Of Object With Base Class System.Windows.Forms.Control

Apr 18, 2012

I have an object (a third component gridview) which is serializable, and I need a deep clone of this object. I have the following code which throws the exception."The type System.Windows.Forms.Control in assembly System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKey Token=b77a5c5 61934e089 is not serializable".So the gridview's base class is System.Windows.Forms.Control, which is not serializable. How can I get a deep clone from the gridview? [code]

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Unable To Cast Object Of Type 'System.Windows.Forms.Button' To Type 'System.Windows.Forms.TextBox'

Apr 28, 2009

I have a panel with some controls in it (several textboxes, a slider, 2 buttons, and a small groupbox).. When I click a button, I want all of the textboxes within the panel to be readonly... So I have this code: [code] When I run it though, I get the following error:Unable to cast object of type 'System.Windows.Forms.Button' to type 'System.Windows.Forms.TextBox'.If I remove a button, it moves on to give me the same error but for a label..

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Value Of Type 'Microsoft.VisualBasic.PowerPacks.RectangleShape' Cannot Be Converted 'System.Windows.Forms.Control'

Feb 1, 2012

I seemed to have have ruined my settings on VS 2010... I can't get the Shapes to work just after I had fixed the problem with the PowerPacks, and then it deleted all of my shapes I had on my form after I was tweaking the code and added another shape. And ever since, the shapes make errors and I can't change there colors. I've tried reinstalling VS 2010, and changing refferences doesn't work anymore. The title is the problem I have with trying to add a shape through the code in my project, here is the code for that:

Public Class Form1
Public Circle As New Microsoft.VisualBasic.PowerPacks.OvalShape()
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[code]....

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Forms :: Error - An Unhandled Exception Of Type 'System.StackOverflowException' Occurred In System.Windows.Forms.dll

Apr 14, 2011

An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll it also says make sure you do not have infinate loop or infinate recursion il give all code in order that they are executed in Check the chechbox and it disables all irelevent stuff and populates the combobox

Private Sub CheckBox_Spray_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox_Spray.CheckedChanged
If Me.CheckBox_Spray.Checked = True Then

[code]....

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Invalid Cast Exception Was Unhandled - Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'

Feb 9, 2012

Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e

[code]....

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VS 2008 Difference Between System.Timers.Timer And System.Windows.Forms.Timer?

Jun 15, 2009

I'm wondering what exactly is the difference System.Timers.Timer and System.Windows.Forms.Timer???

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VS 2008 'ListCount' Is Not A Member Of 'System.Windows.Forms.ListBox'

Nov 9, 2009

Got this error: Error2'ListCount' is not a member of 'System.Windows.Forms.ListBox'.C:STRCC Network AdminNetworkAdminRoomPlan.vb522NetworkAdmin

When trying to do the following:

For i = 0 To ListBox1.ListCount - 1
Next

referecnes to System.Windows.Forms have been added

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VS 2008 'SetItemChecked' Is Not A Member Of 'System.Windows.Forms.ListView'

Feb 9, 2012

I have an application ..windowsform [my solution name]

I am using CheckedListBox .. whereas I want ListView instead of CheckedListBox

but I get the following error

vb.net
ListView.Items.AddRange(DirectCast(ListBox.SelectedItem, [produts]).files)

error for this code

Overload resolution failed because no accessible 'AddRange' can be called with these arguments:
'Public Sub AddRange(items As

[Code]....

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Error - Base Class 'System.Windows.Forms.Panel' Specified For Class 'MenuButton' Cannot Be Different From The Base Class 'System.Windows.Forms.UserControl'

Mar 12, 2010

When I do this

Public Class cInherits : Inherits Panel

I get this: Base class 'System.Windows.Forms.Panel' specified for class 'MenuButton' cannot be different from the base class 'System.Windows.Forms.UserControl' of one of its other partial types.

How do I inherit?

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VS 2008 Error - Unable To Cast Object Of Type 'System.Windows.Forms.MouseEventArgs'

Nov 7, 2009

When executing this code I get this error:

Unable to cast object of type 'System.Windows.Forms.MouseEventArgs' to type 'System.Windows.Forms.DataGridViewCellMouseEventArgs'.

Private Sub NoteGrid_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles NoteGrid.CellContentClick
Try

[code]....

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Unable To Cast Object Of Type 'System.Windows.Forms.Label' To Type 'System.Windows.Fo

Jun 12, 2011

i need to get data from checkbox in a groupbox. in the groupbox, it also have a label. so my coding as below

[Code]...

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VS 2008 User Control Complication With Windows Forms?

Nov 24, 2010

I have a program that I am creating in a windows form to track information about computers that I build for each project I do. The way I have my form layout is two buttons on the top of the form(1 for adding a computer and the 2nd to remove a computer) I then have a Tab window where when I want to add a computer I use the "Add button" click event to create a new tab and add a user control "Computer" that I created that contains all of the default fields that I desire (i.e. serial numbers os type, product key etc.) The "Computer" user control also contains two buttons (1 for adding a PC Card and the 2nd to remove a PC Card) The PC Card is another user control that I have created that has all of the desired fields I require for PC Cards. I am able to add new computers with no problem and name the tab

Dim b As New Computer
Dim x As String = Me.TabEquip.TabCount - 2
Dim tab As New TabPage("Computer" + x)

[code].....

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Operator '*' Is Not Defined For Types 'System.Windows.Forms.VscrollBar' And 'Systems.Windows.Forms.VscrollBar

Oct 29, 2011

I am trying to use values from form1 in my project, in form2, but Im not sure how to do it. I've tried

txtboxTotal = (Form1.vsbLength * Form1.vsbWidth) * Pattern

But I get: operator '*' is not defined for types 'System.Windows.Forms.VscrollBar' and 'Systems.Windows.Forms.VscrollBar.'

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Value Of Type 'System.Windows.Forms.WebBrowser' Cannot Be Converted To 'System.Window

Jan 23, 2010

Private Sub wb_Scrape(ByVal sender As System.Object, ByVal e As

[Code]...

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Vb 2008 Number Guess Game - Operator '<' Is Not Defined For Types 'System.Windows.Forms.Button' And 'Integer'

Oct 29, 2011

I am getting Errors: Operator '<' is not defined for types 'System.Windows.Forms.Button' and 'Integer'.

Operator '>' is not defined for types 'System.Windows.Forms.Button' and 'Integer'.
Value of type 'Integer' cannot be converted to 'System.Windows.Forms.Button'.

And my program does not work!

Below is my code..............

Private Sub ProgressBar1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ProgressBar1.Click
ProgressBar1.Value = TextBox1.Text
End Sub

[CODE]...

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'System.AccessViolationException' Occurred In System.Windows.Forms.dll Immediately Before Entering A Click Handler?

Oct 20, 2010

Win7 64 bit; fully patched VS2008 targeting FW2.0; VB.Net; running in Debug Mode (not tested in Release mode)I have a resonably complex app which I am refactoring a bit. As part of that, I relocated some code from a subroutine into a Click Event Handler. The Event Handler will, late in the handler, call the, reduced in function, subroutine. The point of this is thatNow when I click the button associated with the modified Handler I get:A first chance exception of type 'System.AccessViolationException' occurred in System.Windows.Forms.dll<br />With Error System.AccessViolationException Attempted to read or write protected memory.This is often an indication that other memory is corrupt.

at MusicManager2009.frmMain2.cmdLoadAlbum_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)

[code].....

All functions of the app, except those that start from the buttonclick in question, work as before in the problem version.The problem persists after rebuilding the entire solution, after restarting VS, and after rebooting the PC.

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