Friday, 18 January 2008
|
| Delegate.BeginInvoke and EndInvoke. Amit Bhatnagar 00:06:23 |
| | I have made a service to timeout a method call by launching a delegate
asynchronously via BeginInvoke. The documentation states, indirectly,
that the call to BeginInvoke should be followed by a call to EndInvoke
to prevent leaks. However, I am not sure if the call to EndInvoke is
required should the delegate timeout because the call to EndInvoke will
block the thread and wait for the delegate to complete. So I think what
I have is OK, but can anyone confirm if the call to EndInvoke is
required if it timesout?
See the following code:
---
IAsyncResult asyncResult = d.BeginInvoke(null, new object());
if (asyncResult.AsyncWaitHandle.WaitOne(7000, true))
{
// Not timed out...
d.EndInvoke(asyncResult);
}
else
{
//Timed out ... EndInvoke required here?
}
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| |  16 answers | Add comment |
Thursday, 17 January 2008
|
| Re: Can a .wmv file be placed on a website and played without user John Warner 14:16:05 |
| | See if this link doesn't help:
//steveorr.net/articles/StreamingMedia.aspx
(http: removed)
John Warner
Date: Wed, 16 Jan 2008 09:28:13 -0500 From: "Hevel, Shawn" <ShawnHevel@SCFBINS.COM> Subject: Can a .wmv file be placed on a website and played without user having to download the file? I've got a friend who is looking to place a 30 - 45 minute presentation that is stored in a windows media player file extenstion (.WMV). He would like this placed on a website for users to click and play. Can this be down without having to download the file? He would like it to just play from inside the website without downloading the file. =20 Any ideas? Is this possible? =20 Also, if the file has to be converted to a different format, does anyone know some good software to accomplish this? =20 Thanks, =20 =20 Shawn
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Wednesday, 16 January 2008
|
| Can a .wmv file be placed on a website and played without user having to download the file? Shawn Hevel 17:28:13 |
| | I've got a friend who is looking to place a 30 - 45 minute presentation
that is stored in a windows media player file extenstion (.WMV). He
would like this placed on a website for users to click and play. Can
this be down without having to download the file? He would like it to
just play from inside the website without downloading the file.
Any ideas? Is this possible?
Also, if the file has to be converted to a different format, does anyone
know some good software to accomplish this?
Thanks,
Shawn
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|
| How to maintain order in a grid with three row types. Brady Kelly 13:32:07 |
| | I've probably just been looking at this too long, but would like some input
please. I have a DataGridView that presents reporting bands. Each band may
or may not have a header or a footer, so I use a rowType var that guarantees
the header-band detail-footer will always remain in sequence, but I now
worry about inserts and deletes, where any one of the three, or all three,
may be deleted. Insertions are also causing a brain freeze today.
|
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|
| Erratic Masterpage cast exception Mark Aurit 00:57:07 |
| | I have a masterpage named MasterpageController with a menu. In the
codebehind I have a method SetMasterMenu(<some parms>) to display the
appropriate menu items.
The content page, which has a MasterType directive, executes the method
using "this.Master.SetMasterMenu(<some parms>)". Runs fine for maybe 5-10
"start with/without debugging"'s, while I am in development mode in
vs.net 2005, and then I'll start getting an "Unable to cast object of type
'ASP.masterpagecontroller_master' to type
'ASP.masterpagecontroller_master'" when the content page attempts to
execute the method. I have to restart IIS
to get the app to run correctly .. then a few starts later I get the
exception.
I havent seen this behavior when I publish the app onto a staging
server, just on my development laptop.
Any ideas on how to fix this? Does it only happen while in development,
not in a published site?
Thanks, Mark
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Tuesday, 15 January 2008
|
| property snippet outlining problem chris Burgess 19:37:21 |
| | In VS 2005, the properties that I create with the property snippet
collapse on their own when I don't have the cursor in the property
definition. However, the properties that I create without the snippet
do not. Where is the setting to fix this?
Thanks!
Chris
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Monday, 14 January 2008
|
| Allowing a method to timeout Amit Bhatnagar 20:18:55 |
| | Hi All.
I am finding that my win32 call to SystemParametersInfo in my
FormClosing event handler sometimes hangs my application preventing it
from terminating. Is there a way where I could make the call but after a
timeout period then continue executing the rest of my FormClosing code?
Place this in a thread? I'd like to make the solution generic enough so
that I could timeout any method.
Any ideas?
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| | 5 answers | Add comment |
Wednesday, 9 January 2008
|
| SerialPort.WriteTimout Peter Osucha 20:47:36 |
| | I have been searching for info on what actually will cause a
WriteTimeout error to happen on a serialport object in net 2.0. There
are lots of articles that talk about a Write operation not being able to
complete in the time allotted. However, besides having a series of
bytes to be written that when taking into the account the baud rate
cannot complete in the allotted time, I can't think of another reason
for this error to occur - nor can I find reference to when it will
occur.
Any ideas or places you could point me, please?
Sincerely,
Peter
|
| | 6 answers | Add comment |
Tuesday, 8 January 2008
|
| showdialog and 'Cannot access a disposed object' chris Burgess 22:39:40 |
| | I have the following code to launch forms based upon a selection from
a list box:
Private Sub LoadReport_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles LoadReport.Click
Dim rpt As New BaseReport
rpt = DirectCast(Me.Reports.SelectedValue, BaseReport)
rpt.ShowDialog()
rpt.Dispose()
End Sub
'Reports' is a list box that contains 'Report' objects. The Report
object has a report name property (the DisplayMember) and a report
form property, each of which is derived from BaseForm (the
.valuemember).
If I launch a report form, close it, then try to launch it again, I
get an error:
System.ObjectDisposedException was unhandled
Message="Cannot access a disposed object.
Object name: 'Report_OrdersByDate'."
ObjectName="Report_OrdersByDate"
Source="System.Windows.Forms"
StackTrace:
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Form.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
at System.Windows.Forms.Form.ShowDialog()
at Converse.MainMenu.LoadReport_Click(Object sender, EventArgs
e) in C:\Work\StoreReporter\StoreReporter\MainMenu.vb:line 48
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.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr
hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32
reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32
reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[]
commandLine)
at Converse.My.MyApplication.Main(String[] Args) in
17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile,
Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
|
| | 10 answers | Add comment |
Sunday, 6 January 2008
|
| Renewal of your subscription to the DOTNET-CX list L-Soft list server at DevelopMentor 14:00:08 |
| | Sun, 6 Jan 2008 06:00:08
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Friday, 4 January 2008
|
| TCP Queue (Backlog) Gavin Landon 11:11:42 |
| | Morning all..
I'm having an issue that I've spent a few days on. I'm building a web server and when I stress tested the server I got great results, but with one bad one.. I'm getting a lot of socket errors. I have the following, but this doesn't seem to be working list expected..
IPAddress inputDNS_IP = Dns.GetHostEntry(this.m_szHost).AddressList[0];
this.svrListener = new TcpListener(inputDNS_IP, this.m_lPort);
//setup timeouts..
this.svrListener.Server.ReceiveTimeout = 30000;
this.svrListener.Server.SendTimeout = 30000;
//start with a backlog "TCP/IP Queue" of 1024
this.svrListener.Start(1024);
I've changed the backlog param in Start() from 1 to 4096 and no matter what the value it doesn't seem to queue up the TCP message like expected. Am I missing something?
/*Chizl*/
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Thursday, 3 January 2008
|
| Something more serious than Obsolete. Peter Obiefuna 08:53:05 |
| | Hi,
Hope everyone is having a happy new year so far!
I intend to block compile-time access to some inherited methods. My
preference would be a method Attribute that throws a compile-time error.
Does anyone know of any?
----------------------------
[Obsolete("This method is invalid for an empty collection.")]
protected override void InsertItem(int index, TDomain item)
{
throw new InvalidOperationException(
"This method is invalid for an empty collection.");
}
---------------------------
P
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|
| Windows\App shut down? (OT?) Peter Osucha 00:13:28 |
| | Hi all,
This probably isn't the appropriate place to ask this question - my
apologies in advance. I hope someone might suggest a more appropriate
place to ask this...
I have a windows app running on a machine. If a user goes to
Start-->Shut Down to shut down the system, what can I expect to happen
to my app as far as it shutting down? Does it just get a hard 'END'
message or is the shut down of the app more controlled? App is in C#
for net 2.0...
Thanks,
Peter
|
| | 2 answer | Add comment |
Thursday, 27 December 2007
|
| Ensure only one instance running Graeme Hood 07:23:22 |
| | I have this code to make sure my app can't run twice. But I seem to
remember there was a newer/better way in the latest .Net FW.
Is there?
====================================================
public static void Main()
bool firstInstance = false;
string safeName = Application.UserAppDataPath.Replace(@"\", "_");
Mutex mutex = new Mutex(true, safeName, out firstInstance);
if (!firstInstance) return;
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| | 10 answers | Add comment |
Friday, 21 December 2007
|
| vs.net 2008 - wheres the beef? Mark Aurit 12:26:06 |
| | Does anyone have a good link to what vs.net 2008 has for developers, esp
asp.net developers? All Ive seen is the usual blah-blah-blah plus
LINQ and Silverlight. Neither of which seems compelling to me, at least
right now (kinda like Vista).
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Thursday, 20 December 2007
|
| Unauthorised error Dean Cleaver 16:56:18 |
| | I'm connecting to a web service using network credentials, but have a very strange error occurring. On my desktop and on the SQL Server machine, this program will connect correctly - but on the web server, it will fail with a 401 error. I've double checked and re checked everything, and all credentials are correct - but it still fails. Same exe file works fine from other machines - any ideas on what to look at?
Dino
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| | 6 answers | Add comment |
|
| Raising Events to COM Clients from .NET Assembly Brady Kelly 16:35:53 |
| | Are there any caveats regarding this?
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| | 5 answers | Add comment |
|
| [OT] New LinkedIn group for .Net professionals Adwait Ullal 01:11:35 |
| | http://www.linkedin.com/e/gis/46954/0218F95E466C
Please join and forward to others that might be interested.
Also, if you wish to connect directly with me, please feel free to send me
an invitation.
Happy Holidays!
- Adwait
--
Adwait Ullal
e: mailto:adwait.ullal@gmail.com
w: http://www.adwait.com
l: http://www.linkedin.com/in/adwait
j: http://finance.groups.yahoo.com/group/AdwaitsDotNetJobs
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Tuesday, 18 December 2007
|
| Is it safe to have a mixed-mode DLL serve out COM objects? Gyorgy Bozoki 07:57:08 |
| | Hi all,
I'm working on a mixed-mode DLL in C++ that calls into managed code,
implemented in C#. As it turnes out, the 3rd-party application that I need
to talk to provides some of its functionality through COM interfaces - I
need to implement some of those interfaces on my objects in C++ code.
As I'd prefer to have as few DLLs as possible (my objects will be inproc
servers), I'd like to use the mixed-mode DLL to serve out the COM objects
implementing these interfaces.
Is there anything wrong with this approach? I don't see anything wrong about
it, but it's been a while since I wrote COM code and never before in
mixed-mode.
Thanks for any advice,
Gyorgy Bozoki
|
| | Add comment |
|
| windows command key chris Burgess 01:48:10 |
| | Is there a way to assign a Windows command key shortcut to launch my
winform app?
Thanks,
Chris
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Saturday, 15 December 2007
|
| Calling C# from C++... Gyorgy Bozoki 09:07:27 |
| | Hi all,
I have a problem and I was wondering if someone could give me some advice.
I have a 3rd-party application to which I'm creating a plugin. The plugin
must be a plain Win32 DLL that exports several functions by ordinal. I'll
have to implement the DLL in C/C++, because of memory allocation
requirements - doing this in C# would be very cumbersome.
I also have another DLL written in C# that exposes a few classes and
dialogs, so that users of this DLL can pass some data to these dialogs and
show them on the screen to the user. The DLL is already complete and is used
in several places (all .Net, so far), so I cannot change it in any way.
What I need to do is to use this same C# DLL from my first DLL, which is
written in C++. I know both C++ and C#, but I don't know much about interop
between the two. What would be the best approach to write the C++ DLL so
that it can talk to both the unmanaged 3rd-party app and my managed DLL?
Thanks in advance,
Gyorgy Bozoki
|
| | 1 answer | Add comment |
Friday, 14 December 2007
|
| Native version of VolatileRead and VolatileWrite Alex Ivanoff 19:26:15 |
| | It is a bit off-topic, but I hoped you would not mind. Is the following correct?
C#:
Int32 val = Thread::VolatileRead(ref valueToRead);
C++:
long val;
::InterlockedExchange(&val, valueToRead);
C#:
Int32 val;
Thread::VolatileWrite(&val, valueToWrite);
C++:
long val;
::InterlockedExchange(&val, valueToWrite);
|
| | 10 answers | Add comment |
|
| Visual Studio Performance Andy Langowitz 18:57:43 |
| | When moving from VS 2003 to VS 2005, I found that the performance of the
development environment got worse, particularly when using the Windows Forms
and designer.
Does anyone out there have a sense yet of whether VS 2008 makes this better
or worse?
Thanks,
Andy
|
| | 5 answers | Add comment |
|
