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Without the <= the while loop is never entered because at first nposition has not been incremented and is '0' and the Ubound value of the array is also '0'.
Thanks for your help
Chris
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Problem solved.
Thanks for the help
Chris
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Hi All I wanted to use TAPI in VB.NET.. where a user will dial a number the system will check the users number as an authenticating process and reply back with a message that is stored for that particular user.
Agnelo Noronha
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How can I definite an account is admin's?
I tried to get a registered key (the path of Winword.exe) by VB6 (used API). It was success with my computer (admin account), but failed with others ?!!
Help me, please!
GF bos
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Hey I'm making a breakout game and my problem is that I cant get the ball to bounce off the paddle.
heres the code:
Public Class Form1
Inherits System.Windows.Forms.Form
Dim intHorizontalMomentum As Integer
Dim intVerticalMomentum As Integer
Dim intPaddleSpeed As Integer
Dim intOrigPaddleLocation As Integer
Dim dblDeflectAngle As Double
Dim intDifficulty As Integer
Dim varDeflectAngle As Double
Const constOrigBallLocX = 5000
Const constOrigBallLocY = 3000
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents picPaddle As System.Windows.Forms.PictureBox
Friend WithEvents picBall As System.Windows.Forms.PictureBox
Friend WithEvents picWallTop As System.Windows.Forms.PictureBox
Friend WithEvents picWallLeft As System.Windows.Forms.PictureBox
Friend WithEvents picWallRight As System.Windows.Forms.PictureBox
Friend WithEvents picBrick As System.Windows.Forms.PictureBox
Friend WithEvents tmr1 As System.Windows.Forms.Timer
<system.diagnostics.debuggerstepthrough()> Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container
Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
Me.picPaddle = New System.Windows.Forms.PictureBox
Me.picBall = New System.Windows.Forms.PictureBox
Me.picWallTop = New System.Windows.Forms.PictureBox
Me.picWallLeft = New System.Windows.Forms.PictureBox
Me.picWallRight = New System.Windows.Forms.PictureBox
Me.picBrick = New System.Windows.Forms.PictureBox
Me.tmr1 = New System.Windows.Forms.Timer(Me.components)
Me.SuspendLayout()
'
'picPaddle
'
Me.picPaddle.BackColor = System.Drawing.SystemColors.Highlight
Me.picPaddle.Image = CType(resources.GetObject("picPaddle.Image"), System.Drawing.Image)
Me.picPaddle.Location = New System.Drawing.Point(288, 424)
Me.picPaddle.Name = "picPaddle"
Me.picPaddle.Size = New System.Drawing.Size(100, 16)
Me.picPaddle.TabIndex = 0
Me.picPaddle.TabStop = False
'
'picBall
'
Me.picBall.Image = CType(resources.GetObject("picBall.Image"), System.Drawing.Image)
Me.picBall.Location = New System.Drawing.Point(40, 192)
Me.picBall.Name = "picBall"
Me.picBall.Size = New System.Drawing.Size(16, 16)
Me.picBall.TabIndex = 1
Me.picBall.TabStop = False
'
'picWallTop
'
Me.picWallTop.Image = CType(resources.GetObject("picWallTop.Image"), System.Drawing.Image)
Me.picWallTop.Location = New System.Drawing.Point(0, 0)
Me.picWallTop.Name = "picWallTop"
Me.picWallTop.Size = New System.Drawing.Size(720, 16)
Me.picWallTop.TabIndex = 2
Me.picWallTop.TabStop = False
'
'picWallLeft
'
Me.picWallLeft.Image = CType(resources.GetObject("picWallLeft.Image"), System.Drawing.Image)
Me.picWallLeft.Location = New System.Drawing.Point(0, 0)
Me.picWallLeft.Name = "picWallLeft"
Me.picWallLeft.Size = New System.Drawing.Size(16, 456)
Me.picWallLeft.TabIndex = 3
Me.picWallLeft.TabStop = False
'
'picWallRight
'
Me.picWallRight.Image = CType(resources.GetObject("picWallRight.Image"), System.Drawing.Image)
Me.picWallRight.Location = New System.Drawing.Point(680, -1)
Me.picWallRight.Name = "picWallRight"
Me.picWallRight.Size = New System.Drawing.Size(16, 456)
Me.picWallRight.TabIndex = 4
Me.picWallRight.TabStop = False
'
'picBrick
'
Me.picBrick.Image = CType(resources.GetObject("picBrick.Image"), System.Drawing.Image)
Me.picBrick.Location = New System.Drawing.Point(296, 72)
Me.picBrick.Name = "picBrick"
Me.picBrick.Size = New System.Drawing.Size(100, 24)
Me.picBrick.TabIndex = 5
Me.picBrick.TabStop = False
'
'tmr1
'
Me.tmr1.Enabled = True
Me.tmr1.Interval = 1
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.BackColor = System.Drawing.SystemColors.ControlText
Me.ClientSize = New System.Drawing.Size(696, 454)
Me.Controls.Add(Me.picBrick)
Me.Controls.Add(Me.picWallRight)
Me.Controls.Add(Me.picWallLeft)
Me.Controls.Add(Me.picWallTop)
Me.Controls.Add(Me.picBall)
Me.Controls.Add(Me.picPaddle)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
intDifficulty = 10
intHorizontalMomentum = -intDifficulty
intVerticalMomentum = 10
End Sub
Protected Overrides Function ProcessCmdKey(ByRef msg As System.Windows.Forms.Message, ByVal keyData As System.Windows.Forms.Keys) As Boolean
Select Case keyData
Case Keys.Left
intPaddleSpeed = intDifficulty
Case Keys.Right
intPaddleSpeed = -intDifficulty
Case Else
Return MyBase.ProcessCmdKey(msg, keyData)
End Select
Return True
End Function
Private Sub tmr1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmr1.Tick
picPaddle.Left = picPaddle.Left - intPaddleSpeed
picBall.Top = picBall.Top + intVerticalMomentum
picBall.Left = picBall.Left + intHorizontalMomentum
'paddle
If picBall.Top - picBall.Height <= picPaddle.Top Then
picBall.Top = picPaddle.Top + picPaddle.Height
intVerticalMomentum = -intVerticalMomentum
End If
'left wall
If picBall.Left <= picWallLeft.Left + picWallLeft.Width Then
picBall.Left = picWallLeft.Left + picWallLeft.Width
intHorizontalMomentum = -intHorizontalMomentum
End If
'right wall
If picBall.Left + picBall.Width >= picWallRight.Left Then
picBall.Left = picWallRight.Left - picBall.Width
intHorizontalMomentum = -intHorizontalMomentum
End If
'top wall
If picBall.Top <= picWallTop.Top - picWallTop.Height Then
picBall.Top = picWallTop.Top - picWallTop.Height
intVerticalMomentum = -intVerticalMomentum
End If
'paddle/wall
If picPaddle.Left <= picWallLeft.Left + picWallLeft.Width Then
picPaddle.Left = picWallLeft.Left + picWallLeft.Width
intPaddleSpeed = 0
End If
If picPaddle.Left + picPaddle.Width >= picWallRight.Left Then
picPaddle.Left = picWallRight.Left - picPaddle.Width
intPaddleSpeed = 0
End If
End Sub
Private Sub Form1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyUp
intPaddleSpeed = 0
End Sub
End Class
the problem is after the 'paddle
plz help thanks
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Reading your code is really a hard work being mentioned this way!
Try just sending the parts you have writen or the parts causing the error and ALSO the error description
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When I click on the save button I get a error. Here is the code
Private Sub SaveRecord()
Dim pdsSaveRow As DataSet
Me.BindingContext.(Me.DsCustomerIndividual1, "Customers").EndCurrentEdit()
pdsSaveRow = DsCustomerIndividual1.GetChanges(DataRowState.Modified)
odaCustomerIndividual.Update(pdsSaveRow)
Me.DsCustomerIndividual1.Customers.AcceptChanges()
End SubPrivate Sub SaveRecord()
Dim pdsSaveRow As DataSet
Me.BindingContext(Me.DsCustomerIndividual1, "Customers").EndCurrentEdit()
pdsSaveRow = DsCustomerIndividual1.GetChanges(DataRowState.Modified)
odaCustomerIndividual.Update(pdsSaveRow)
Me.DsCustomerIndividual1.Customers.AcceptChanges()
End Sub
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What's the error you are getting?
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See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidOperationException: Update requires a valid UpdateCommand when passed DataRow collection with modified rows.
at System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping tableMapping)
at System.Data.Common.DbDataAdapter.Update(DataSet dataSet, String srcTable)
at System.Data.Common.DbDataAdapter.Update(DataSet dataSet)
at How_To_1._1.Form1.SaveRecord() in C:\Documents and Settings\Harrison\My Documents\Visual Studio Projects\How-To 1.1\Form1.vb:line 504
at How_To_1._1.Form1.txtSave_Click(Object sender, EventArgs e) in C:\Documents and Settings\Harrison\My Documents\Visual Studio Projects\How-To 1.1\Form1.vb:line 514
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** Loaded Assemblies **************
mscorlib
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/microsoft.net/framework/v1.1.4322/mscorlib.dll
----------------------------------------
How-To 1.1
Assembly Version: 1.0.1780.42193
Win32 Version: 1.0.1780.42193
CodeBase: file:///C:/Documents%20and%20Settings/Harrison/My%20Documents/Visual%20Studio%20Projects/How-To%201.1/bin/How-To%201.1.exe
----------------------------------------
System.Windows.Forms
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll
----------------------------------------
System
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll
----------------------------------------
System.Drawing
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll
----------------------------------------
System.Data
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/system.data/1.0.5000.0__b77a5c561934e089/system.data.dll
----------------------------------------
System.Xml
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/system.xml/1.0.5000.0__b77a5c561934e089/system.xml.dll
----------------------------------------
Accessibility
Assembly Version: 1.0.5000.0
Win32 Version: 1.1.4322.573
CodeBase: file:///c:/windows/assembly/gac/accessibility/1.0.5000.0__b03f5f7f11d50a3a/accessibility.dll
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 7.0.5000.0
Win32 Version: 7.10.3052.4
CodeBase: file:///c:/windows/assembly/gac/microsoft.visualbasic/7.0.5000.0__b03f5f7f11d50a3a/microsoft.visualbasic.dll
----------------------------------------
************** JIT Debugging **************
To enable just in time (JIT) debugging, the config file for this
application or machine (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
<system.windows.forms jitdebugging="true">
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the machine
rather than being handled by this dialog.
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hi folks
i hope some experienced VB programmer will be able to help me here. I am using a free video capture control that i got from the net on a form in my application .its works fine saves some frames and emails them .
BUT is it possible to capture video in background when the application window is minimized .??
its not possible for me so far caz when i minimize the window i think the control loses focus or stops refreshing and the video display is not updated.
My requirement is to make this application as service or background application so that video capture happens in background when the application window is minimzed so that user can do other stuff..
any ideas suggestions .....??
thanx in advance
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Hi,
I am having problems with using the DrawToDC of the
MSHTML.iHTMLElementRender in a VB.net application. For some reason I am
getting a "catastrophic error". I am basing the code on c# examples, and I cant figure out what I am doing wrong. From the C# posts it seems that
the drawtodc has a bug and you need to redifine it, so i followed their
advice and specified an interface as below but without any luck:
iHTMLElementRender Interface Code
Imports System
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports mshtml
<ComVisible(True), ComImport(),
Guid("3050f669-98b5-11cf-bb82-00aa00bdce0b"), _
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)> _
Interface IHTMLElementRender
Sub DrawToDC(<[In]()> ByVal hDC As IntPtr)
Sub SetDocumentPrinter(<[In](), MarshalAs(UnmanagedType.BStr)> ByVal
bstrPrinterName As String, <[In]()> ByVal hDC As IntPtr)
End Interface 'IHTMLElementRender
On the main form of the application I am have the folowing code when a button is clicked:
Dim objMSHTML As HTMLDocument
Dim objDocument As IHTMLDocument2
Dim ips As IPersistStreamInit
objMSHTML = New HTMLDocument()
ips = DirectCast(objMSHTML, IPersistStreamInit)
ips.InitNew()
objDocument =
objMSHTML.createDocumentFromUrl("http://www.google.com", String.Empty)
Do Until objDocument.readyState = "complete"
Application.DoEvents()
Loop
MsgBox(objDocument.body.outerHTML)
Dim bodyElement As IHTMLElement
Dim render As IHTMLElementRender
If objDocument.body.outerHTML <> Nothing Then
bodyElement = objDocument.body
render = bodyElement
Dim img As New Bitmap(600, 400)
Dim g As Graphics = Graphics.FromImage(img)
Dim memDC As IntPtr
memDC = g.GetHdc()
Try
render.DrawToDC(memDC)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End If
It seems like I am getting the HTML document just fine, is just that when I
try to use DrawToDC to get the application to print/send to the DC i Created
in memory, it causes the error.
From the dotnet newsgroups I was told I am not hosting MSHTMl fully and that might be the cause . I was told that I should use either the internetexplorer/webbrowser controls or the MSHTMl fully. I cannot find any source on the web on how to do this in vb.net I tried the following but this also failed.
Dim browser As New SHDocVw.InternetExplorer()
browser.Navigate("http://www.google.com")
Do Until browser.ReadyState = 4
Application.DoEvents()
Loop
Dim objDocument As IHTMLDocument2 = browser.Document
MsgBox(objDocument.body.outerHTML)
Dim bodyElement As IHTMLElement = objDocument.body
Dim render As IHTMLElementRender = bodyElement
Dim img As New Bitmap(600, 400)
Dim g As Graphics = Graphics.FromImage(img)
Dim memDC As IntPtr
memDC = g.GetHdc()
Try
render.DrawToDC(memDC)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
Here are the links to where I got the C# examples:
http://groups.google.com/groups?hl=en&lr=&threadm=a299f931.0406011058.43b92799%40posting.google.com&rnum=5&prev=/groups%3Fnum%3D100%26hl%3Den%26lr%3D%26q%3DDrawToDC%2B%2Bfailure
http://blogs.msdn.com/rfarber/archive/2004/10/12/240943.aspx
The article from this site with a C++ example:
http://www.codeproject.com/internet/htmlimagecapture.asp?msg=783713
Any ideas on what exactly I am doing wrong? Is it something to do with how I am hosting mshtml, or is it something with the iHTMLElementRender interface?
thanks
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I need some help with printing. I can easily print a plain text document, but I can't seem to figure out how to print into Rich Text. This entire thing is driving me insane as I really need this for a big project of mine. I really need an example project with all the page setup, print preview, print dialog features... Why didn't Microsoft make this easy?
Please help me!
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Dr. Pool wrote:
I really need an example project with all the page setup, print preview, print dialog features...
Try to check from:
1. Page setup.[^]
2. Print and print preview.[^]
Dr. Pool wrote:
need some help with printing
Try to check here[^] but it demonstrate in vb5, and you should convert it to vb.net
Let me know if it is working or not!!!
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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I want to create an application that has no user interface. The application will be started and stopped using the process class. Creating an app that starts with a Sub Main is no help because it still compiles as a Windows or Console app. Any ideas?
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Thanks. I'll try this. I was hoping for something that doesn't create any UI overhead. I don't know if using this setting does or doesn't.
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You might be want to create windows service application.[^] Let me know is this match what you need or not.
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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Thanks for the reply. I tried a service app but got a message saying it had to be installed and I didn't want to take that route. May I didn't try for long enough.
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L.s.
I have written a program vb.net and i have compiled it in to an .exe
Part of this .exe is a module with one argument.
I want to run this .exe from the DOS prompt.
Actually, I want that certain module to be executed giving it an value for it's argument.
I hope someone can help me,
I really need an solution.
Best regards,
Steven
Steven de Vries
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Steven de Vries wrote:
I want to run this .exe from the DOS prompt.
What type of application that you create in vb.net? Do you create console application. If so, try read this lab.[^] Let me know if it is match what you need or not.
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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I have a DataSet set up as an XML file and a DataGrid bound to that DataSet that displays all of the columns in the XML database except for three, one of those being the primary key. I want the user to be able to double click on a row in the DataGrid and have it display the entire record on another form. But I'm having trouble getting the data since the primary key isn't in the dataGrid. I tried using the CurrentRow index but it doesn't necessarily match the same row number of the DataSet, especially if it's been sorted. So how can I link the row selected in the DataGrid to the matching row in the DataSet?
I'm a newbie at DataGrids and DataSets so I've been searching for the answer to this for a few days. I found out this morning that the ASP.NET DataGrid has a property called DataKeys. Does the VB.NET DataGrid have something similar?
C code. C code run. Run code run!
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Is there no way to do this in VB.NET? Basically all I'm looking for is a way to determine the primary key of the row that the user double clicked on in the DataGrid.
Thanks in advance!
C code. C code run. Run code run!
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You have to use the BindingContext to determine the current dataviewrow. From there you can get the datarow and pull out the Primary Key. Ex:
Private Sub DataGrid1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataGrid1.DoubleClick
Dim dvRow as DataRowView = Me.BindingContext(DataGrid1.DataSource, DataGrid1.DataMember).Current
Dim dRow as DataRow = dvRow.Row
MsgBox("dRow Primary Key: " & dRow.item("Key"))
End Sub
From what I've read, this may not work if you're using a filter to display your data.
C code. C code run. Run code run!
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hi everyone
i need an urget urgent urgent help
well what i need help in is, that i want to develop a call card solution , let me exaplin simply, my customer will buy a card, then dial a number, this number asks him to insert the pin code, the authentication is done, then the system will give him a tone and he will dial is number!
ofcourse using .NET
well thats its!
so is there anyone can lead me to anything to start with, any link or code or tutorial and wwillllll be realllyyyy thankfulllll
Kind Regards
Mahmoud Manasrah
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In my opinion, I guest that this is homework that you got from school. Most of our member help to the member that face the real problem in project and give the answer for the peiece of the problem in the project.
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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