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I found a WebCam class here's a link "http://dotnetjunkies.com/WebLog/principal/articles/32662.aspx" it's in C# but you can either convert it to vb or compile it as a .dll and use it that way.
This is the structure I pulled out of the class example in the link above.
<code>
<StructLayout(LayoutKind.Sequential)> _
Public Structure VIDEOHDR
<MarshalAs(UnmanagedType.I4)> _
Public lpData As Integer
<MarshalAs(UnmanagedType.I4)> _
Public dwBufferLength As Integer
<MarshalAs(UnmanagedType.I4)> _
Public dwBytesUsed As Integer
<MarshalAs(UnmanagedType.I4)> _
Public dwTimeCaptured As Integer
<MarshalAs(UnmanagedType.I4)> _
Public dwUser As Integer
<MarshalAs(UnmanagedType.I4)> _
Public dwFlags As Integer
<MarshalAs(UnmanagedType.ByValArray, SizeConst := 4)> _
Public dwReserved() As Integer
End Structure 'VIDEOHDR
</code>
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I've found the problem: the garbage collector. 
Solved it by using GC.KeepAlive()
Thanks for you help.
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I am trying to add a delete button. I need it to delete the selected row in a datagrid. My Dataset is called as DS.I am working with an xmlfile.I already have an add button that is functioning properly:
<br />
Dim myRow As DataRow<br />
<br />
myRow = DS.Tables(0).NewRow()<br />
<br />
myRow(0) = TextBox1.Text<br />
myRow(1) = TextBox2.Text<br />
myRow(2) = TextBox3.Text<br />
myRow(3) = TextBox4.Text<br />
myRow(4) = TextBox5.Text<br />
<br />
DS.Tables(0).Rows.Add(myRow)<br />
<br />
TextBox1.Clear()<br />
TextBox2.Clear()<br />
TextBox3.Clear()<br />
TextBox4.Clear()<br />
TextBox5.Clear()<br />
I just need the delete button. any help would be greatly apprecitated.
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Datagrid? or Dataset?
I am assuming you mean you want to delete a row from your dataset. If that is the case, you first need to know what row you want to delete. once you know that, you should be able to do DS.Tables(0).Rows.Remove or .Delete. Can't remember off the top of my head.
Are you displaying this data in a datagrid object? If so, you will need to capture the id of the row you are on, and will then want to utilize the ItemCommand event of the DataGrid.
Levi Rosol
Blog By Levi[^]
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I want the user to be able to delete any row selected. Yes the data is displayed in a datagrid. how do I capture the ID?
And just as a little memory refresher its Remove.
thanks for the help.
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hii guys..I have a simple question.I havent got a clearly guide about how to connect with database in mysql using vb yet.Please explain to me step by step.thanks 4 ur help
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Try to check the information from here.[^]
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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When I create a thread in my VS .NET application (Dim trdSocket As Thread = New Thread(AddressOf Socket.Listen)), when I close the application with the X in the top right corner, my application still in the list of process... I guess I need to kill the thread when I exit the program ? Which event do I need to use and with which method of the Thread class I can kill the thread ?
Thanx a lot!
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Hi.
I use this.
<br />
Protected Overrides Sub OnClosing(ByVal e As System.ComponentModel.CancelEventArgs)<br />
trdSocket.Abort <br />
End<br />
End Sub<br />
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Hello everyone, I am trying to create splash screens for my software. I have no idea where to start, can anyone please help me get started.
Thanks
[CDH]
Thanks cPod....
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Yes, try to search for 'splash' in the codeproject articles.
Please before posting here make one search on codeproject and one search in google. Thx.
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I did do a search on codeproject. If you are not going to help I would prefer you to keep your commits to yourself. I am here trying to learn like everyone else...
[CDH]
Thanks cPod....
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Try to check the information from here[^] and here.[^]
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
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Is there anyway we can design crystal report at VB.NET runtime? I've been doing research about it but couldn't find anyone doing it.
If you know a website where I can buy it, please help. Thanks
John
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it is possible, but is neither easy, nor cheap.
do research on the RDC tool within Crystal. I worked with a group of people who had a .net web app create reports, with both data and formatting done on the fly. No rpt file was ever created on the server. However, with crystal, licensing will bite you in the ass. If you expect to have more than 50 concurrent connections, expect to spend well over $100,000
I should also say that it has been 1.5 years since i've done anything with crystal, and some of what i just said may have changed. I believe we were using 8.5 or crystal 9 at the time.
Have you looked into using Reporting Services[^] from Microsoft? I would suggest using RS over Crystal any day. Only misleading thing about RS is that if you have your web server on one box, and sql on another (as you should), you will need 2 SQL server licenses. SQL Standard is fine if you are fine with windows auth for security, otherwise, you will need at least one of the licenses to be Enterprise.
hope this helps more than it confuses 
Levi Rosol
Blog By Levi[^]
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Does anyone know how to create a class library (dll)with visual basic 2003 standard? Standard does not come with class library template!
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 I am trying to work out client server application using VB .NET Remoting. MY APPLICATION IS RUNNING AS FOLLOWS:
Server has a set of DLL's to be loaded via reflection from the client.There is also a host application running on server that
returns the reference of an anchored(Not Serializable) object to the client(listening at some port on server machine for
client requests). This Host application is invoked remotely by the client.When i invoke this host application directly from
some DLL (ON CLIENT) & CALL ITS METHODS, it works fine. However when i load some assembly via reflection on the client
(dynamic loading) & that dynamically loaded assembly in turn try to call some method on that object (returned from remote
Host on server) then a SECURITY EXCEPTION IS RAISED.This Security exception is only raised for those methods that accesses
the database on the server & not for any other Methods. I am unable to find a solution to this problem.
CAN ANYBODY HELP ME ?
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I like using frames. VB.NET does not (or so it appears). I have a header frame with a navigation sub (Nav) that changes a title grapher (in the header frame) and the URL of the main frame. This works fine when I call it from the header frame, but when in import the header class and call it from the menu frame, it crashes because the focus is on the menu frame and not the header frame. I have tried:
With ("javascript:parent.frames('header').document.items('Image2')) but this does not work. Is this really this hard to do? Here is my subroutine I am trying to use from both the header frame and the menu frame:
Public Sub Nav(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs)
Dim strName As String = e.CommandName
Dim strArg As Integer = CInt(e.CommandArgument)
Dim strURL As String
Select Case strArg
Case 1
Me.Image2.ImageUrl = "images/Page1.png"
Me.Image2.AlternateText = "Welcome"
Case 2
Me.Image2.ImageUrl = "images/Page2.png"
Me.Image2.AlternateText = "About Us"
Case 3
Image2.ImageUrl = "images/Page3.png"
Image2.AlternateText = "Mission"
Case 4
Image2.ImageUrl = "images/Page4.png"
Image2.AlternateText = "Gallery"
Case 5
Image2.ImageUrl = "images/Page5.png"
Image2.AlternateText = "Services"
Case 6
Image2.ImageUrl = "images/Page6.png"
Image2.AlternateText = "References"
Case 7
Image2.ImageUrl = "images/Page7.png"
Image2.AlternateText = "Contact Us"
Case 8
Image2.ImageUrl = "images/Page8.png"
Image2.AlternateText = "Favorites"
End Select
'Response.Redirect(strURL)
End Sub
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Your question would be better handled in the ASP.NET Forum. It has nothign to do with VB.NET, even though the code is written in it.
BTW: VB.NET/ASP.NET does work perfectly fine with frames, if done correctly.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi,
I am adding 4 dynamic datagrids to my webform. all columns are bound columns.
do i need to add template columns if i want to do inline editing. how do I do this.
I need the datagrid row to open up into edit mode with the textboxes so that the users can edit the data.
how do i capture which datagrid row is clicked.
please help me with this.
Thanks,
Soujanya
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Hi all,
Here's my problem. I have an MDI but I don't want the user to be able to open more than one instance of a form at a time. I have written the following function. I think I am close but this still allows more than one instance open at one time or in other words allways returns False:
Private Function checkExistingForm(ByVal frm As Form) As Boolean
checkExistingForm = False
Dim frmArray() As Form
frmArray = Me.MdiChildren()
Dim frmArrayLength As Integer
frmArrayLength = frmArray.Length
Dim i As Integer
For i = 0 To frmArrayLength - 1
If frmArray(i) Is frm Then
Debug.WriteLine(frmArray(i))
checkExistingForm = True
Exit For
End If
Next
End Function
I call the above function in this code:
Private Sub ToolBar1_ButtonClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolBarButtonClickEventArgs) Handles ToolBar1.ButtonClick
If e.Button Is Me.tbStock Then
Dim stockForm As New Stock
If Me.checkExistingForm(stockForm) = True Then
Exit Sub
End If
stockForm.MdiParent = Me
stockForm.Show()
End If
end sub
Any help would be greatly appreciated.
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Hi ,
Check out this one..........................
Private Function IsFormOpen(ByVal OpenForm As Form) As Boolean
Dim intOpenForms As Integer
Try
Dim formExists As Boolean = False
For intOpenForms = 0 To MdiChildren.Length - 1
If MdiChildren(intOpenForms).Name = OpenForm.Name Then
formExists = True
MdiChildren(intOpenForms).Activate()
Exit For
End If
Next
Return formExists
Catch exc As Exception
Throw exc
End Try
End Function
Private Sub ToolBar1_Buttonclick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolBarButtonclickEventArgs) Handles ToolBar1.Buttonclick
If e.Button Is Me.tbStock Then
Dim stockForm As New Stock
If IsFormOpen(stockForm) = True Then
stockForm.Dispose()
Exit Sub
End If
stockForm.MdiParent = Me
stockForm.Show()
End If
end sub
Hope this will help u..............................:->
Ritesh
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Thanks Ritesh,
That worked great.
Mark.
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