What This Line Means - Inherits System.Windows.Forms.Form
Mar 20, 2009What this line means? Inherits System.Windows.Forms.Form
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Inherits System.Windows.Forms.Form Is Missing In New Forms?
Mar 5, 2012When I add a new, empty form to my VB.NET VS9 project, the linenherits System.Windows.Forms.Formis missing.What am I doing wrong here?I thought it would be added automatically.I experienced that some thing get weird if this line is not there (Form_Load is not firing, I think).
View 3 RepliesC# - Text Of A System.Windows.Forms.GroupBox Wraps To The Next Line?
Mar 12, 2010I'm creating a GroupBox at runtime and setting its Text property. Usually, the text is only on one line, but sometimes it wraps. The problem is that the controls contained in the GroupBox cover up the GroupBox's text.
What I'd like to do is determine if and when the text wraps. Specifically, I'd like to determine how much extra height the wrapped text takes up as compared to a single line. That way, I can reposition the GroupBox's controls and adjust its height.
Initially, I thought I'd do this by calling the GroupBox's CreateGraphics() method, and using the Graphics to measure the string. Something like this:
[Code]...
The problem is that the size generated by g.MeasureString(text, grp.Font) doesn't seem to be accurate. I determined that it wasn't accurate by putting enough of a single character to cause a wrap, then measuring the resulting string.
For example, it took 86 pipes (|) to until a wrap happened. When I measured that string, its width was ~253. And it took 16 capital W's to force a wrap - its string had a width of ~164. These were the two extremes that I tested. My GroupBox's width was 189. (a's took 29 and had a width of ~180, O's took 22 and had a width of ~189)
Cast A System.string To System.windows.forms.form?
Feb 23, 2009I want to cast a system.string to system.windows.forms.form
View 2 RepliesImplicit Conversions From 'System.Windows.Forms.Control' To 'System.Windows.Forms.Webbrowser'
Sep 8, 2010I 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]...
VS 2008 Passing A Form - Get The Error.'cmbDataTable' Is Not A Menber Of 'System.Windows.Forms.Form'?
Nov 26, 2010I'm upgrading a project from VB6 to VB2008.I have a routine that clears a combo box, named 'cmbDataTable' which could be on any form. I pass the form and the combo box is cleared.
[code]...
I assumed it would be the same in VB2008 but I get the error.'cmbDataTable' is not a menber of 'System.Windows.Forms.Form'I am working my way through the project, first updating the global procedures - this is one - I haven't written the calls so cmbDataTable doesn't yet exist.
Forms :: Command Line Like Interface In A Windows Form?
Jun 27, 2010I am working on an application and I want the user to be able to enter commands into a textbox, and when they press enter, the command is printed in a rich text box, executed, and the output is printed. For instance: the user types move{file1}, {location} into the text box and this happens:
>command: move{file1}, {location}
>$ moving file1 to location
>job completed
How would I write lines to the rtb and execute commands when the enter key is pressed?
This works, partly.
Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles command.KeyPress
If e.KeyChar = Microsoft.VisualBasic.ChrW(Keys.Return) Then
RichTextBox2.Text = Environment.NewLine + command.Text
End If
End Sub
it erases everything in the textbox before adding the line... I would also like to be able to make a database of commands, maybe a .dll or something, so that when the user types in something, it checks that database to see if the command exists, if it does it executes, if not, error.
Cannot Import System.Windows.Media.Imaging And System.Windows.Forms Or System.Reflect?
Mar 16, 2009With the following imported namespaces in my project :
Imports System.Windows.Forms
Imports System.Reflection
.. I cannot add..
[code].....
Unable To Cast Object Of Type 'System.Windows.Forms.Button' To Type 'System.Windows.Forms.TextBox'
Apr 28, 2009I 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..
View 4 RepliesError: The Designer Cannot Process The Code At Line 25: Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Mar 11, 2010THis is my error: The designer cannot process the code at line 25: Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font The code within the method 'InitializeComponent' is generated by the designer and should not be manually modified. Please remove any changes and try opening the designer again.
Callstack is:
at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.CreateQuoteExpression(XmlElementData xmlElement)
at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.XmlElementData.get_CodeDomElement()
[code]....
Forms :: Error - An Unhandled Exception Of Type 'System.StackOverflowException' Occurred In System.Windows.Forms.dll
Apr 14, 2011An 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]....
What The First Line Of Each Property Means
May 5, 2009I have been given the following code that I want to change to VB however I dont understand the first line of every property:
1<ConfigurationProperty("mailSubject", DefaultValue:="Mail from TheBeerHouse: {0}")> _
2 Public Property MailSubject() As String
3Get
[code]...
Error - Base Class 'System.Windows.Forms.Panel' Specified For Class 'MenuButton' Cannot Be Different From The Base Class 'System.Windows.Forms.UserControl'
Mar 12, 2010When 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?
Unable To Cast Object Of Type 'System.Windows.Forms.Label' To Type 'System.Windows.Fo
Jun 12, 2011i need to get data from checkbox in a groupbox. in the groupbox, it also have a label. so my coding as below
[Code]...
Operator '*' Is Not Defined For Types 'System.Windows.Forms.VscrollBar' And 'Systems.Windows.Forms.VscrollBar
Oct 29, 2011I 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.'
Value Of Type 'System.Windows.Forms.WebBrowser' Cannot Be Converted To 'System.Window
Jan 23, 2010Private Sub wb_Scrape(ByVal sender As System.Object, ByVal e As
[Code]...
'System.AccessViolationException' Occurred In System.Windows.Forms.dll Immediately Before Entering A Click Handler?
Oct 20, 2010Win7 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.
Error - An Unhandled Exception Of Type 'System.StackOverflowException' Occurred In System.Windows.Forms.dll
Feb 19, 2010When 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]....
Error : A First Chance Exception Of Type 'System.ArgumentException' Occurred In System.Windows.Forms.dll
Nov 16, 2009I 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]....
Error : An Unhandled Exception Of Type 'System.ArgumentOutOfRangeException' Occurred In System.windows.forms.dll
May 6, 2009I 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].....
VS 2008 : A First Chance Exception Of Type 'System.InvalidOperationException' Occurred In System.Windows.Forms.dll
Feb 12, 2011A 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.
View 2 RepliesError:A First Chance Exception Of Type 'System.Reflection.TargetParameterCountException' Occurred In System.Windows.Forms.dll
Feb 6, 2010I 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].....
Forms :: Command Line Args In Windows Forms?
Aug 2, 2010I was playing a game recently and saw that they could use args in the shortcut, and I decided to try to impliment this into my application...so far, I got: (runs this sub on load)
Sub startup_args()
If Environment.GetCommandLineArgs.Contains("+game") Then
Dim path As Array = Environment.GetCommandLineArgs
[code]....
just to see what it returns, but the application crashes. I also tried path.tostring(), but that didn't work. When I did:
If Evnironment.GetCommandLineArgs.Contains("+game") Then
Dim path as string = Environment.GetCommandLineArgs.tostring
MsgBox(path)
[code]....
but that returned the value "SString.Array[]"...
Forms :: String Cannot Be Converted To System.windows.forms.label
Mar 31, 2010I 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.
View 8 RepliesIDE :: DataGridView1_CellLeave(sender, New System.EventArgs), Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.DataGridViewCellEventArgs'.
Jun 27, 2011VB 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.
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'."
VS 2010 Unable To Cast Object Of Type 'System.Windows.Forms.MouseEventArgs' To Type 'System.ComponentModel.RunWorkerCompletedEventArgs'
Jun 25, 2010My 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'.
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.
Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'
Jun 12, 2011Unable to cast object of type 'System.String' to type 'System.Windows.Forms.TextBox'.
View 12 RepliesError - You Must Implement A Default Accessor On System.Configuration.ConfigurationLockCollection Because It Inherits From ICollection
May 12, 2011I have a web service created with vb.net in vs 2010. Here is a look at my property
Public Class MyClass
Inherits ConfigurationSection
Protected _score As Integer
[code].....
When I try to add this as a service to a web app, also done in vs2010 with vb.net, I get the error in the title. Please help with this. I am not sure what is needed in order to implement a default accessor.