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Re: ItemActivate of directory browser mav.northwind29-Oct-07 19:57 mav.northwind 29-Oct-07 19:57  Start a debugger and try to find it out Put a breakpoint to your Process.Start() instruction and check sPath and sFileName. Oh, and are you sure you want to use ListView1.FocusedItem instead of ListView1.SelectedItems[0] ? Regards, mav -- Black holes are the places where God divided by 0... Re: ItemActivate of directory browser [modified] gerbenschmidt29-Oct-07 23:48 gerbenschmidt 29-Oct-07 23:48  I managed to run files....I placed a MessageBox to check what the path was of the SelectedNode....It turned out not to be the Full Path but a Folder in the tree. So I added also the string of the rootpath to that Folder.... Anyway it is running files now....however only known filetypes....when a filetype is not associated to a program by windows I get an error...is it difficult to solve that? also folders are listed in the ListView.....when I double click them....an external explorer window of the selected item is opened outside my application....but the ListView should work like an explorer too....so it must browse when a folder is double clicked and it should run when a file is selected... What is the difference between: ListView1.FocusedItem and ListView1.SelectedItems[0] ? Thanx for helping me out sofar....I am a beginner in programming. -- modified at 6:33 Tuesday 30th October, 2007 How to get and set object in collection.... Sasmi_Office27-Oct-07 3:39 Sasmi_Office 27-Oct-07 3:39  I made a class of collection, i'm storing the object in the collection, while returning the object from the class, i want to use all the methods and properties of that perticular object e.g. 'TextBox'. But what happens is it is creating the new instance of the textbox object, and i failed to get my values that i had passed as an object in the collection. Environment is as follows: .Net 2.0 Language = C#.Net Sasmi Re: How to get and set object in collection.... Luc Pattyn27-Oct-07 4:10 Luc Pattyn 27-Oct-07 4:10  Sasmi_Office wrote: it is creating the new instance of the textbox object certainly not, unless you have a "new" keyword in there. show us some code! Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google How we get real time typing status in C#.NET D i x y27-Oct-07 2:53 D i x y 27-Oct-07 2:53  How could we get real time typing status in C#.NET Google Chat and Yahoo messanger Re: How we get real time typing status in C#.NET Anthony Mushrow27-Oct-07 3:21 Anthony Mushrow 27-Oct-07 3:21  I don't understand the question. My current favourite word is: Waffle Cheese is still good though. how to get HTML data in listview control D i x y27-Oct-07 2:49 D i x y 27-Oct-07 2:49  I am developing an C#.NET application in which i need to get webpage HTML data in Listview control. Re: how to get HTML data in listview control Anthony Mushrow27-Oct-07 3:20 Anthony Mushrow 27-Oct-07 3:20  Well, when you get your response stream, you can read from it. And you can put this data into strings and other such variables. Then you can put these strings and whatnot into your list view. My current favourite word is: Waffle Cheese is still good though. Re: filtering result in grid view by changing the item in the dropdown list Paul Conrad27-Oct-07 11:15 Paul Conrad 27-Oct-07 11:15  sunilwise wrote: its very urgent plz Saying urgent and using textspeak doesn't really motivate people to help around here. "I really like comments where I don't have to answer stupid questions" - stfx BeginInvoke sloooooow mav.northwind27-Oct-07 1:39 mav.northwind 27-Oct-07 1:39  Hi folks! I'm having a hard time trying to explain a behaviour of one of my applications on a customer's PC. In the app I'm using Control.BeginInvoke() to marshal a call to the main UI thread. In all of my tests, when I start my app manually (for example from a command line), this BeginInvoke call is executed within a few ms (20-90ms), everything works as expected. On this particular customer's PC my app is being called from a third-party application (I was told they're simply using ShellExecute, as one would expect). In this case, the call to BeginInvoke() takes about 8 seconds (!). When I run the application from the command line on the customer's PC (and not have the third-party program call it), the response time is back to normal. I don't have the faintest idea how this behaviour can be explained. Has anyone here an idea? Thanks in advance! Regards, mav -- Black holes are the places where God divided by 0... Re: BeginInvoke sloooooow Luc Pattyn27-Oct-07 13:37 Luc Pattyn 27-Oct-07 13:37  Hi mav, that did not ring a bell; maybe you could tell some more about what the app is about (database, networking, WMI, whatever), and which OS your particular PC and the others are running? Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google Re: BeginInvoke sloooooow mav.northwind27-Oct-07 20:26 mav.northwind 27-Oct-07 20:26  Hi Luc! Thanks for your response. The app is part of a dictation management system and is called by the other application to show a speech recognized dictation. It's using .NET remoting to communicate with a server application (running on the same machine in this case). All the PCs we're talking about are running XP SP2. The windows firewall is disabled as well as BitDefender, that has been reported (by a colleague of mine) as being installed on the customer's PC. So nothing out of the ordinary, as far as I can tell... I had a really vague suspicion about threadpool starvation (especially because the app is using .NET 1.1 and thus the ThreadPool is limited to 25 threads), because Control.BeginInvoke() is using a ThreadPool thread IIRC, but I cannot see how the different calling mechanisms (ShellExecute vs. command line) are supposed to influence the ThreadPool. Regards, mav -- Black holes are the places where God divided by 0... Re: BeginInvoke sloooooow Luc Pattyn28-Oct-07 4:33 Luc Pattyn 28-Oct-07 4:33  Hi Mav, AFAIK Control.BeginInvoke() causes execution on the same thread Invoke() does: the thread on which the Control's handle got created; that should not be a ThreadPool thread... On the other hand, if somehow the ThreadPool is involved, then maybe this statement holds the clue: "There is one thread pool per process. The thread pool has a default size of 25 threads per available processor". Maybe the failing PC has fewer processors than the others? Regards, Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google Re: BeginInvoke sloooooow TJoe28-Oct-07 5:01 TJoe 28-Oct-07 5:01  There are actually two types of BeginInvoke[^], one for controls and one for delegates. Take care, Tom ----------------------------------------------- Check out my blog at http://tjoe.wordpress.com Re: BeginInvoke sloooooow Luc Pattyn28-Oct-07 5:22 Luc Pattyn 28-Oct-07 5:22  Hi Tom, thanks for clarifying this. It explains how the ThreadPool may get involved... Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google Re: BeginInvoke sloooooow TJoe27-Oct-07 13:41 TJoe 27-Oct-07 13:41  This may have something to do with Code Access Security[^], but I'm not positive. When using BeginInvoke, the calling thread's stack must be serialized (so the security permissions can be checked when the invoked method is actually run). If it's a single call you are having problems with, then this may not be it. Take care, Tom ----------------------------------------------- Check out my blog at http://tjoe.wordpress.com Re: BeginInvoke sloooooow mav.northwind27-Oct-07 20:31 mav.northwind 27-Oct-07 20:31  Hi Tom! Thanks for your suggestion, this is one aspect I haven't checked yet. But since all the applications are running on the same PC I didn't expect a problem with CAS. Besides - if some security permissions are not set correctly, wouldn't you expect a SecurityException instead of an 8 second delay? But nevertheless, I'll check it tomorrow, thanks. I'm really clutching at straws here Regards, mav -- Black holes are the places where God divided by 0... Re: BeginInvoke sloooooow TJoe28-Oct-07 4:40 TJoe 28-Oct-07 4:40  If it's running correctly then you probably have the correct permissions. I was thinking the checking of the permissions might be your issue. There are some gotchas with CAS that I do know about though (e.g. running a .Net application from a network share results in low trust). Take care, Tom ----------------------------------------------- Check out my blog at http://tjoe.wordpress.com Re: BeginInvoke sloooooow TJoe28-Oct-07 5:13 TJoe 28-Oct-07 5:13  Also, you can try coding up another application that simply calls your application using ShellExecute. If your version runs fine, then maybe they are doing more than just calling ShellExecute. Take care, Tom ----------------------------------------------- Check out my blog at http://tjoe.wordpress.com Re: BeginInvoke sloooooow mav.northwind29-Oct-07 20:02 mav.northwind 29-Oct-07 20:02  ReHi! I've tried this and couldn't reproduce the problem this way. It's really wicked. The only additional hint I got was when a VNC viewer we were using to access the particular client also started giving error messages (GDI related), so perhaps there's a general problem (HW?) with this machine. Regards, mav -- Black holes are the places where God divided by 0... Re: BeginInvoke sloooooow TJoe30-Oct-07 2:08 TJoe 30-Oct-07 2:08  If it always happens when your app is started from the third-party app and never happens when your app is started directly, then I would not think it's a general problem. If it were then you would see the issue when the third-party app is not launching your app. If this is only happening on that single box (regardless of how it was launched), then I would agree that it was a problem with the machine. Even when launched from the third-party app, does it always take 8 seconds to execute? Are there other instances of BeginInvoke that are used? Have you tried using perfmon (Performance Monitor) to see if your application is starving the ThreadPool? Also, can try logging the number of available threads[^]? Take care, Tom ----------------------------------------------- Check out my blog at http://tjoe.wordpress.com Re: BeginInvoke sloooooow mav.northwind2-Nov-07 10:01 mav.northwind 2-Nov-07 10:01  Hooray, at least I got a clue. Today I got a chance to look at the machine in question and found out the reason for the delay. It was not machine-related, was not thread-pool related and could be reproduced on another machine. The reason was/is the way the third-party app is calling our program. They are calling ShellExecute() and then immediately enter a busy wait for 10 seconds waiting for a response file from us. Once the timeout occurred, operation of the other app went back to normal (i.e. not cluttering the processor with busy waits) and our app finally got started. Strangely enough, as soon as I lowered the third party app's priority, the call did come through and operation was almost normal. I'll have to investigate further because I could then reproduce the effect with a little test application, but not if I called notepad instead of our app. Notepad opened reasonably fast. A hello world WinForms-app also took veeeery long to start up under these conditions. But at least now I got something to work on... Thanks for your suggestions! Regards, mav -- Black holes are the places where God divided by 0... GDI Exception DeepOceans27-Oct-07 1:16 DeepOceans 27-Oct-07 1:16  Hi I m facing exception while saving an image. The code is //this line throws Exception picturebox.Image.Save(memorystream, System.Drawing.Imaging.ImageFormat.Jpeg ); and exception is: "A generic error occurred in GDI+." So plz tell me the solution Regards Shanzay Re: GDI Exception Anthony Mushrow27-Oct-07 2:28 Anthony Mushrow 27-Oct-07 2:28  My guess is that there is something up with the memory stream. Try saving the image to a file (by passing a string) instead of a stream. If the error still occurs, then it must be a problem with the image. My current favourite word is: Waffle Cheese is still good though. Re: GDI Exception Luc Pattyn27-Oct-07 3:39 Luc Pattyn 27-Oct-07 3:39  Hi, almost all errors occuring in GDI+ lead to the same message, so it can be many things. Most liekly in your case: you have forgotten to reposition the stream, if you write data to a stream, its position advances; now if you want to save the image, you need to set the position to zero again. Try memorystream.Position=0 before Image.Save Luc Pattyn [Forum Guidelines] [My Articles] this months tips: - use PRE tags to preserve formatting when showing multi-line code snippets - before you ask a question here, search CodeProject, then Google

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