VS 2008 NullReferenceException - WMPLib.IWMPEqualizerSettingsCtrl
Aug 29, 2009
I'm trying to make a simple equalizer I have my windows media control and a trackbar, this is the code im using.
Private Sub TBGLevel_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TBGLevel.Scroll
Dim equalizer As WMPLib.IWMPEqualizerSettingsCtrl
equalizer.gainLevel1 = TBGLevel.Value
End Sub
Upon moving the trackbar I get this error
NullReferenceException was unhandled Object reference not set to an instance of an object.
I also tried
Public equalizer As WMPLib.IWMPEqualizerSettingsCtrl
Same error occured.Basically i hit play so it would go through my playlist on the form then attempted to move that gainlevel and it produced the error.
View 5 Replies
ADVERTISEMENT
Dec 3, 2010
we developed an application. it has windows media player control.
Note 1:
2 DLL Files(Interop.WMPLib.dll And AxInterop.WMPLib.dll) is for Windows Media Player Control, and automaticly add by visual studio.
Note 2:
Visual Studio 2008 / .Net Framework 2.0 / Windows XP & Vista & 7
If use dlls for windows xp(Windows Media Player Control)
run app in windows xp = do not have any problem.
run app in windows vista and 7 we do not have media player control.
if use dlls for windows vista and 7(Windows Media Player Control)
app does not run in windows xp
and we do not have any problem in windows vista or 7.
View 4 Replies
Feb 13, 2010
I am using Windows Media Player library (WMPLib.dll) in my application. I wanted to make CD Burning wizard, because WMPLib.dll has ability to burn audio/data CD's. I declared an object which can erase or burn CD:
Dim CDBurner As WMPLib.IWMPCdromBurn
Dim WMP As New WMPLib.WindowsMediaPlayer()
[CODE]...
I get exception with message "Attempted to read or write protected memory.". I have an option "Full Trust Application" enabled in Visual Sudio. Is there anything I can do about this error?
View 1 Replies
Oct 8, 2009
I get this error message: Object reference not set to an instance of an object at the bolded line of this
Public Sub MyPrintDocument_PrintPage(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles myprintdocument.PrintPage
Dim more As New Boolean
more = mydatagridviewprinter.DrawDataGridView(e.Graphics)
If more Then e.HasMorePages = True
End Sub
Here is DrawDataGridView:
[Code]...
View 2 Replies
Nov 25, 2009
Function GetHtml(ByVal url As String, ByRef web As WebBrowser) As String
Dim WebString As String
Dim myURI As New Uri(url)
web.Url = myURI
WebString = web.Document.Body.InnerHtml
Return WebString
End Function
System.NullReferenceException
View 2 Replies
Jan 5, 2011
I am using Windows 7 64-bit and Visual Studio 2010 (VB.Net)
I am trying to write a media player using the wmplib.dll for playback. Everything is working but I found a one problem I can't find an answer to. How do you find the songs duration before actually playing the song? the code I am using is below.
I get an error when I try to update the slider with the current position. The messagebox returns all zeros. (i.e. 0 - 0 -0 ).
' SET FILE NAME
Dim sFile As String = "D:MusicSongsArtistsEaston Corbin�1-Easton Corbin�4 - The Way Love Looks.mp3"
[Code].....
View 5 Replies
Jan 23, 2012
i have a code that grabs an image from a site, this works fine and it does get the image fine, but every now and again my internet runs slow and it takes a while for the image to pop up thus causing the error:[code]How would i make it display the msgbox if it returns NullReferenceException error ?
View 9 Replies
Sep 27, 2011
i have a small problem with my code that only happens every now and again.Im using multi threading on this and every now and again i get this error: System.NullReferenceException was unhandled Message="Object reference not set to an instance of an object."
Some times the program completes perfect with no errors and sometimes i get the above error.When i get the error there is always 1 item left in the list but when it completes perfect no items are left.Again this error does not appear every time, only every now and again. For example i had to run my program like 20 time to get this error, 19 times it worked perfect with no errors and 1 time with this error.
View 14 Replies
Sep 7, 2011
Hmmmm having discovered that using the mciAPI doesn't utilise 5.1 sound, but using a virtual WMP does - I started a new approach to my multimedia project using some code from the net. BUT I keep getting exceptions (particularly with type casting). In the subrountine 'Player_PlayStateChange'.
The listing (see below) is now well commented by me. Can anybody please help concerning the damn annoying exceptions and stop me pulling my hair out.
[Code]...
View 9 Replies
Feb 22, 2010
I have 5 columns in my datagridview, I want the ability to hide them, depending on which checkboxes are ticked (I have 4 checkboxes). This can either be as soon as the checkbox changes state or after a button is clicked to reload the dataset/gridview.
View 3 Replies
Mar 26, 2011
[code] this is my code n i want to store data at runtime in the my database.i used data base as an access07 and my platform is vb.net..Now come to the point when i run the project it terminates when i'm inserting my data in the access file.[code]
View 4 Replies
Jan 19, 2009
My code
Dim pointer As Integer, index As Integer
For pointer = 1 To 6
For index = 0 To 5999
[CODE]...
All i get is an error message saying NullReferenceException was unhandled the bold part is were it says the error is
View 1 Replies
Oct 26, 2009
The MSDN documentation for WMPLIB states that syncing to device is not supported in .NET programming, only C++.Is there, however, a simple wrapper class or DLL that can be used to interface between a .NET program and the nescessary C++ code?Or is there a better way to sync files to a device using VB.NET? Are all devices suited/compatible with just a simple filesystem.copyfile ?
View 1 Replies
Apr 5, 2011
I need to get the current song in Windows Media Player, preferably using the wmp.dll library. There's documentation on MSDN [URL] but none of the resources I've tried have worked, even though I referenced the DLL and imported. Note that I'm using Visual Basic 2010 Express
View 1 Replies
Sep 6, 2011
I am having another issue with WMP in VB.NET 2010.I wrote an app using WMP in VB.NET 2010, using .NET Framework 4.0 of course, but had to change the framework target to 3.5. After doing this, the WMP component does not work. How, if I even can, fix this problem so that the program will run on .NET Framework 3.5? The error says that it could not load AxInterop.WMPLib.dll because it was built in a runtime newer than the currently loaded one.
View 2 Replies
Oct 1, 2010
When I iterate the media items in a Windows Media Player playlist and set the properties of a user-defined class to the attributes of a media item, the first n rows of the playlist are populated with useful information; however, the remaining rows are empty. If I perform the same operation but access the media items directly (e.g., display the attributes to the console window) then all items in the playlist are populated properly.
Here is an example of the output showing the condition:
Inserting song "The Arrest" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
Inserting song "Peter's Denial" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
Inserting song "Pilate and Christ" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
[code]....
View 2 Replies
May 2, 2011
I am using wmplib and i like to know a duration time of a lot of files onto a same folder (software for audiobook for low vision persons)
View 2 Replies
Oct 23, 2009
I have recently gotten my hands on a free, open-source IMAP connection API.So far, I have been successful in creating a connection to one of my accounts.Where I'm getting stuck is retrieving folders and/or emails from those folders.Does there happen to be anyone here that is familiar with this API, or even Gmail (particularly the folder structure for IMAP)?
If not, here is a link to the DLL that is listed on sourceforge and the company's website that created it (if you feel like testing):
Koolwired
Sourceforge - Koolwired API
I have created a test account so feel free to use the code below without worrying about username/password issues; I'll just delete it when I'm done with it.Here is the code I have made so far for making a connection:
Dim gSession As New Koolwired.Imap.ImapConnect("imap.gmail.com", 993, True)
Dim gAuthenticate As New Koolwired.Imap.ImapAuthenticate(gSession, "imap_test@serysoft.com", "imap_test")
Try
[code]....
When I run that code, I get an error that states:System.NullReferenceException: Object reference not sent to an instance of an object. (The bold line in the above code).
Now, I'm not sure exactly what that means. Does that mean it tried to access the server and "INBOX" doesn't exist so it gets returned a NULL value? Or is it possibly the coding itself?Maybe the Gmail folder system is weird due to the fact they use labels (even though from what I have read online, the labels act as the folders in the IMAP system).
View 11 Replies
Feb 15, 2012
I have a Form with a Media Player in it. Which plays a Song.
[Code]...
It's playing in the background since the Form is hidden. When I play itin Debug, everything works fine. When I run the app outside Debug, I get this error: [URL] The Music File is there, but strangely, there comes this weird error.
View 4 Replies
Apr 26, 2011
look after the error i'm having.
module1.vb
Imports System.Data.SqlClient
Module dbconn
[code]....
View 5 Replies
Oct 21, 2010
I am getting a NullReferenceException was unhandled error when i run my debugging in this part of my code:Dim x As Integer = Val(index.Chars(0))
View 7 Replies
Sep 19, 2011
This never happened to me, and the less data one has (usually) the less you can say what happened.I am trying to write a simple query analyser. I randomly receive these kind of crashes:
[Code]...
The file specified above does not exist. The place where it crashes is wrapped with Try-End Try. Moreover, yes, I have the painting event set up but it should not concern it (or maybe it does?). I have to add that I use visual basic express edition. The error occurs ocasionally - sometimes when I'm lucky nothing happens, and when I'm not then I get this crash.
View 1 Replies
Apr 5, 2011
When I debug a program my IDE simply does not catch System.NullReferenceException - execution continues as if there were nothing wrong.Moreover, when I go to the menu Debug/Exceptions System.NullReferenceException is not even in the list(Common Language Runtime Exceptions).
I manually add it (there is the Add button) and I put a checkmark in the 'Thrown' and 'User unhandled' column - now IDE catches it, but after I re-load the project the situation re-appears - and NullReferenceException is not on the list again. What may be wrong?
Update:No, when I step through the code the execution does not continue but exits the current block of code (sub or function). There were no Try...Catch blocks and there is a message: A System.NullReferenceException occured in MSCorlib.dll... But why doesn't the debugger stop at this line?
View 3 Replies
Jun 8, 2010
How can I get a NullReferenceException in the following scenario?
Dim langs As IEnumerable(Of SomeCustomObject) = //some LINQ query
If langs Is Nothing Then Return Nothing
If langs.Count = 1 Then //NullReferenceException here
What am I missing here? Debug shows that langs is really just a LINQ queryresult without any results...
View 3 Replies
Nov 21, 2009
Okay after searching two listbox's on a form I am trying to put a number as a string in a label setup for that but keep exgetting a NullReferenceexception error on the label. Label being "shippingDataLabel.text".e is my code;
Public Class MainForm
Dim fifteenShipping As Integer = 15
Dim twentyShipping As Integer = 20
[code].....
View 2 Replies
Jul 25, 2011
I have a VB.NET solution that I just upgraded. It was originally in .NET 1.1, I upgraded to .NET 2.0 and verified that it would build and run correctly. Then I upgraded from 2.0 to 4.0. It is still building with no errors, but when I try to run I am getting a NullReferenceException in Global.asax.vb. The really weird thing is, the line that is throwing the exception is this:
Dim dt As System.Data.DataTable I am not trying to use the variable, just declare it. Further down a Function is called that returns a DataTable and sets the variable, but I don't even get to that line. It is throwing the NullReferenceException on the Dim line. Has anyone run across this before? Is this some issue with upgrading?
[Code]...
I did a Rebuild Solution before posting. This is a web application and the only files I see in the bin folder are the dll files I am referencing. I'm not sure what else I should clean up.
View 1 Replies
Mar 16, 2009
I've seen so many posts on this but I just don't understand how to fix it.
HTML
Me.txtDeletedItem.Text = objDeleteLog.Name
[b]Me.txtDeleteReason.Text = objDeleteLog.Code.Description[/b]
[code]....
View 2 Replies
Jan 25, 2012
vb
Imports System.Windows.Forms.HtmlDocument
Public Class test_vbdotnet
Private Sub runtime()
[Code].....
I want VB.NET to get access to the innerText and make a if statement out of it. But it always returns error. (see the comments for details.)
View 3 Replies
Nov 30, 2010
This is driving me slighty madder than i usually am. The thing thats bugging me is the EXACT same code works in a test project i did with an sdf database.See my comments in the code
vb Private Sub tbScan_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles tbScan.KeyUp
[Code]...
View 5 Replies
May 7, 2011
VB
Dimserial As New Processserial.StartInfo.FileName = "adb"serial.StartInfo.Arguments = "get-serialno"serial.StartInfo.UseShellExecute = Falseserial.StartInfo.RedirectStandardOutput =
[code].....
View 6 Replies
