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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Can't Import System.Windows.Media.Imaging?

Jan 24, 2010

I'm getting a message when I try to import this namespace that "Namespace or type specified in the Imports System.Windows.Media.Imaging doesn't contain any public member or cannot be found.  Make sure the namespace or the type is defined etc..."  

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Access ITPC Metadata In Jpg Files Using System.Windows.Media.Imaging

May 13, 2010

I have spent the best part of a day to try and get metadata out of a jpg.

Function getmetadata(ByVal f As String) As String
Dim txt As String
Dim fs As New System.IO.FileStream(f, FileMode.Open, FileAccess.Read, FileShare.Read)

[Code]....

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

Feb 19, 2010

When I run my project I get "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll"

Public Class frmViewReport
Dim objForm As New frmViewReport
Private Sub frmViewReport_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
objForm.ViewReport("C:a2.rtp", , "@parameter1=test�mter2=10")

[code]....

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Error : A First Chance Exception Of Type 'System.ArgumentException' Occurred In System.Windows.Forms.dll

Nov 16, 2009

I have the following code running, the first time I change the selected index, everything runs smoothly.  However, if I try to change the selected index again, nothing happens and the subcategories combobox values do not change. 

Private Sub cboMainCategory_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboMainCategory.SelectedIndexChanged
'* make sure the combobox is fully loaded

[code]....

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Error : An Unhandled Exception Of Type 'System.ArgumentOutOfRangeException' Occurred In System.windows.forms.dll

May 6, 2009

I keep getting an eroor this error says: An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll Additional information: Specified argument was out of the range of valid values.

Option Strict On
Public Class frmWeeklyReport
Inherits System.Windows.Forms.Form

[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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Error:A First Chance Exception Of Type 'System.Reflection.TargetParameterCountException' Occurred In System.Windows.Forms.dll

Feb 6, 2010

I am working on a card game, and i get this werid error:

A first chance exception of type 'System.Reflection.TargetParameterCountException' occurred in System.Windows.Forms.dll

The code that is cousing this error is:

Private Delegate Sub ShowcardDelegate(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
Private Sub Showcard(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean)
If objtest.InvokeRequired Then

[code].....

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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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IDE :: DataGridView1_CellLeave(sender, New System.EventArgs), Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.DataGridViewCellEventArgs'.

Jun 27, 2011

VB 2008, DataGridView,DataGridView1_CellLeave(sender, New System.EventArgs)

"Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.DataGridViewCellEventArgs'."

What is the Correct String for "New System.EventsArgs"

Anybody there is to help me out.

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Treeview Node "Error 1 Value Of Type 'System.Windows.Forms.TreeNode' Cannot Be Converted To 'System.IO.SearchOption'"

Jan 17, 2011

[Code]...

there is one problem here the root node on the line "GetDirectories(info.GetDirectories(0, rootNode))" here is the error "Error 1 Value of type 'System.Windows.Forms.TreeNode' cannot be converted to 'System.IO.SearchOption'."

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VS 2010 Unable To Cast Object Of Type 'System.Windows.Forms.MouseEventArgs' To Type 'System.ComponentModel.RunWorkerCompletedEventArgs'

Jun 25, 2010

My project worked a first and now its giving me a problem.The error

Quote:

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

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Error : Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.KeyPressEventArgs'

May 16, 2011

[URL]The issue is as soon as I change the value of the text boxes it gives me an error and forces me to close the project.

The error is:Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.KeyPressEventArgs'.

However I'm supposed to clear the number of gallons used and the total charged when a change is made to the contents of the 2 text boxes on the form.

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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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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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Keep Getting A "System InvalidOperationException Occurred In System Windows Forms Dll" Error

Jun 7, 2010

I've just started learning VB.NET with VS 9.0; a small application I'm working on keeps returning an "A first chance exception of type System InvalidOperationException occurred in System Windows Forms dll" error from the Immediate Window. The application has almost zero functionality so far, it consists of a menu strip with:

File About
|Open
|Save
|Save As
|Quit

The only code I have written opens an Open File dialog, a Save As dialog, an About window with background sound and an OK button, and the Quit button which exits.

Since there is almost no code for me to search through, I can't understand why there would be an error. The program runs just fine when I'm debugging it too.

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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 Equivlent To System.Windows.Media.FormattedText?

Apr 6, 2010

Was wondering if there is something similar to the System.Windows.Media.FormattedText object that i can use to format a string of text and then draw it to an System.Drawing.Image object.

This is a windows forms app so don't really want to use this wpf component if i can help it.

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System.io.fileinfo Cannot See A File In System Folder On Windows Server 2008 64bit

Jan 28, 2010

I have a utility that is a simple exe that is not installed compiled with VS2005 and works well. But when I upgraded to VS2008 the utility can no longer locate files in the active system folder. I have UAC turned off and am logged in as the Administrator and it still can not locate a file that I can see in Windows Explorer. The file I am looking for is PakMgr.exe.

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Warning28Implicit Conversion From 'Object' To 'System.Windows.Media.Animation.Storyboard'

Feb 24, 2009

Dim storyboard As Storyboard = Me.FindResource("Show Search")
storyboard.Begin()

Warning28Implicit conversion from 'Object' to 'System.Windows.Media.Animation.Storyboard'

listviewmain.Items(i).movieAddedindex

Warning2Late bound resolution; runtime errors could occur.

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PrintDialog Windows - Getting An Error "An Exception Of Type 'System.Runtime.InteropServices.SEHException' Occurred In System...?

Dec 1, 2011

I'm using a 64 Bit Windows 7 system and trying to use PrintDialog. I know it doesn't work on Windows 7 unless you add this

PrintDialog1.UseEXDialog = True

So I have added that code but then I get this error for the following

Dim result As DialogResult = PrintDialog1.ShowDialog()

And the error:

"An exception of type 'System.Runtime.InteropServices.SEHException' occurred in System.Windows.Forms.dll but was not handled in user code

Additional information: External component has thrown an exception."

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System.Windows.Forms In 3.5?

Apr 6, 2009

I'm trying to implement a website screen shot class as described hereThe class imports the following methods

Imports System
Imports System.Drawing
Imports System.Drawing.Imaging

[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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.net - Best Use Of System.Windows.Forms.Application.Run()?

May 18, 2010

i Have a programa that has starts in a main sub, it executes some code and after that code it opens a form using

System.Windows.Forms.Application.Run(General)

General is a form but also a class, so I wonder what it the pros or cons of using :

System.Windows.Forms.Application.Run(General)
vs
Dim gen as general
System.Windows.Forms.Application.Run(gen)

In the first I am opening a form using the name of the class, and I read that it is best to declare the instance as an object variable.

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System.Windows.Forms.DateTimePicker?

Aug 7, 2009

I am using System.Windows.Forms.DateTimePicker in my vb dot net project. This is an upgraded project from VB. The old code is

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System.Windows.Forms.RichTextBox?

Jul 10, 2009

I did a conversion of a VB6 project to VB.NET 2005 and some properties of a RichTextBox control weren't upgraded. I was wondering if someone could tell me an alternative or what to do about the following properties of the RichTextBox:

ZOrder - this worked in VB6:
formMain.textStatusWindow.ZOrder(VB6.ZOrderConstants.BringToFront)
SelColor - this worked in VB6 fo example: formMain.textStatusWindow.SelColor = RGB(207, 73, 10)

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'Value' Is Not A Member Of System.Windows.Forms.HtmlElement'

May 24, 2009

I was just trying to create something and I found a little code on the web. When I pasted it it got 8 errors, and I could get rid of 5. The other three; I have no idea... It returns an error ('Value' is not a member of System.Windows.Forms.HtmlElement'). How should I fix this? The code is:

[Code]...

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Address A System.Windows.Forms.Label?

May 10, 2012

I am trying to learn Vb.net 2010 by converting a Vb6 Sudoku program that used text box arrays. So far I have a programmatically generated grid of labels, which seems to work OK.[code]...

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DataGridView - -1 Error From The System.Windows.Forms

Jun 21, 2010

OK, in it's simpest terms, I have a custom object (all string Items) which I add to a list of those items. The list is declared as a global variable. One form updates the list, another contains a dataGridView (vs.net 3.5) that displays the list items. The view displays the correct data. For some reason, if I select a header in the dgv before it's populated, that's fine, but if I select it (click anywhere with the mouse) it bugs out with an Index = -1 error from the System.Windows.Forms. CurrencyManager.get_Item(Int32 index) bit.

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System Windows Forms Application StartupPath In WPF

Jun 12, 2011

i have one window application developed in VS 2005 which is running successfully on client side,My question is that now i want to convert this window application in WPF browser based application, so what should i keep in mind to convert this application to wpf applicaton, One more thing that in Window Application i have used one mdb file which contain database login detail, so on application startup this file is accessed using System.Windows.Forms.Application.StartupPath+@"/filename.mdb", now im just want to test only whether can i login to my application using WPF or not this time it give me this error "Request for the permission of type 'System.Security. Permissions. RegistryPermission, mscorlib, Version=2.0.0.0, Culture=neutral".

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System.Windows.Forms Sequence Of Events

Oct 6, 2009

Which form events fire when a form is minimized, restored and maximized.I am trying to draw lines on a PictureBox control, but cannot get the draw subroutine to run after the form has been restored from a minimized windowstate.I probably should know this answer, but I have not written much code in the last 4-5 years and am relatively new to vb.netAlso.

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Use A Variable With System.Windows.Forms.Keys?

Apr 25, 2012

I want to use System.Windows.Forms.Keys with a variable for example

shortcutkey = "A"
keydata = System.Windows.Forms.Keys.shortcutkey

The idea was to implement custom shortcuts that the user specifies to perform certain actions.

My code is like this

If (((BindingFunctions.IsKeyDown(Keys.ControlKey) AndAlso BindingFunctions.IsKeyDown(Keys.ShiftKey)) AndAlso BindingFunctions.IsKeyDown(keyData)) AndAlso (keyData = Keys.L)) Then

[Code].....

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Using A Regular System.Windows.Forms.Timer?

Jan 11, 2010

Hello,

I'm writing a windows service and initially tried just using a regular System.Windows.Forms.Timer, but never saw it's tick event get fired in my debugger.  From doing some research, it appeared that I needed to use the S ystem.Timers.Timer control instead.  In order to make debugging easy, I set my timer interval to a really short value 1000 ms.  I'm seeing some rather strange behavior, though.  It appears that my timer control is creating multiple threads within my application, or is this just a bug in my debugger?  I have an event handler for the Elapsed event like so:

[code]...

When I step through my code like this, it now appears to work as expected.  Has anyone else run into this?

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Windows Forms App: System.NullReferenceException Error

May 22, 2012

I have been trying to figure out the source of error in my application. What this function (GetConcentrations()) is to display data from my database onto a DataGridView. The function is called in the PageLoad but works fine but when I call it in another Sub, I get this error.

Here is the code:

Private Sub GetConcentrations()
Dim conString As String = ConfigurationManager.ConnectionStrings("dbAsthmaConnectionString").ConnectionString
Me.dataAdapter = New SqlDataAdapter("Select * from tblConcentrations", conString)

[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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Company Firewall With System.Windows.Forms.WebBrowser

Nov 22, 2010

VB2005. In my application I am required to go to a website, collect info, and then display both the webpage and the info collected. For this I am using the System.Windows.Forms.WebBrowser component and have it working faily well. The only thing now is that in order to get to external websites the company requires us to login to the firewall proxy server. For example when I visit [URL] a login box pops-up for our firewall server [URL] and I sign in with ID 9999 and password "pass". I am trying to programatically do this with the WebBrowser by using the credentails but have not found any relevant examples. Is this possible with the System.Windows.Forms.WebBrowser component?

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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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DataBind Is Not A Member Of System.Windows.Forms.DataGridView

May 19, 2009

when I use datagridview1.databind() getting error as : DataBind is not a member of System.Windows.Forms.DataGridView..

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