Re: memory problem with tooltips on picturebox - C# Discussion Boards

Re: Constructing Absolute URL

3-Nov-06 4:55

try using the ~ (tilde)

Nadia Monalisa3-Nov-06 5:23

Re: Constructing Absolute URL

3-Nov-06 5:23

Thanks,
I used this convention ~ in ASP.NET, but this is I am doing for WinForm. Will ~ works for WinForm Application As well ?

Thanks

Scott Dorman3-Nov-06 11:35

Scott Dorman

3-Nov-06 11:35

You could try using the UriBuilder class:

<br />
UriBuilder builder = new UriBuilder();<br />
builder.Host = "www.myWebSite.com";<br />
builder.Scheme = "http";<br />
builder.Path = System.IO.Path.Combine("pictures/good", @"/abc/def/ghi.JPG");<br />
<br />
string absoluteUrl = builder.Uri.AbsoluteUri<br />

-----------------------------
In just two days, tomorrow will be yesterday.

memory problem with tooltips on picturebox

Fabrice Deshayes aka Xtream3-Nov-06 4:39

3-Nov-06 4:39

hi!

i'm using VS 2005 express to build C# .NET 2.0 windows applications.
I've done a simple user control with 3 pictures box which are vumeter for cpu, ram and network bandwith. the width of the picture box go from 1 to 100 pixels in relation with pourcentage of cpu used, ram used or network bandwith used.

On a timer (each 500 ms), i get all informations to calculate correct vumeter width and set tooltips on this vumeter to show informations when mouse is over vumeter.

My probleme is that this user control eat a lot of RAM (2 mo per minute if timer is set to 10 ms) because of tooltips. If i put tooltips code in comment, all is ok.

so i think there's a problem in .NET framework with tooltips on Picture box.

can someone confirm this bug in .NET 2.0 ?
a little test :
- create a new windows application
- create a flow layout panel on main form
- create a usercontrol with a picture box and a timer (10 ms interval)
- on each timer tick, set a tooltip on the picture box
- add this usercontrol on the flow layout panel
here is my tooltips parameters
automaticdelay = 1
autopopupDelay = 60000
initialDelay = 1
reshowDelay = 0
showAlways = true

run your program for some time (10 min) with or without the setTooltips and watch ram used by the application.

am i mad or there's really a probleme on .NET framework ?

Fabrice Deshayes aka Xtream
http://www.xtream.be

ed^nrgc3-Nov-06 4:58

3-Nov-06 4:58

Are you creating a new tooltip each time? I would check there for any memory leaks.

Are you sure it's actually a memory leak, or is it that GC hasn't happened yet?

Fabrice Deshayes aka Xtream3-Nov-06 6:00

3-Nov-06 6:00

no, i'm not creating a new tooltips each time. I've only one tooltip component that i've drag'n dop on my usercontrol. The only thing i'm doing is :
myTooltip.setTooltip(myCpuVumeter, myCpuString);
myTooltip.setTooltip(myMemoryVumeter, myMemoryString);
myTooltip.setTooltip(myNetworkVumeter, myNetworkString);

myTooltip is created only one time in the designer generated C# code.
the 3 Strings are private variables of my class. i don't do a new in the timer for these string, only change their content like this :
myCpuString = String.Format(resources.GetString("SysInfos_17"), cpuUsed);

i don't think GC hasn't happened yet because i've wait long hours and days and memory increase without ending.

with comments on setTooltips code lines, i'm running my apps fine in 39 mo since an hour.
if i let the 3 setTooltips code lines, i'm at 100 mo in 20 minutes!

Guffa3-Nov-06 7:45

Guffa

3-Nov-06 7:45

Does it only occur if you have a picture box in a user control in a flow layout?

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b { font-weight: normal; }

Fabrice Deshayes aka Xtream4-Nov-06 0:58

4-Nov-06 0:58

i've done the test and put it here
http://perso.wanadoo.fr/xtream/TestTooltipsMemoryLeak.zip

only a form with 3 picture box and a timer which change tooltips value on picture box.
Timer is disable by default, you've got to press button to enable it and watch memory used with windows task manager.

it seems that there's a memoryleak in the setTooltip method.

can someone try this apps (sources and binaries (in bin/debug) are include) and watch used memory with timer on and off to tell me if there's any trouble ?

for me, there's approximatly 1 mo per minute which is consumed and never released when timer is on.

Guffa4-Nov-06 4:16

Guffa

4-Nov-06 4:16

Yes, I can see the memory usage go up.

I profiled it, and from what I can see there are no managed resources that causes this.

The application is going through a lot of memory, though. I displayed the garbage collection counters, and it does a garbage collection every five seconds.

---
b { font-weight: normal; }

Fabrice Deshayes aka Xtream4-Nov-06 10:50

4-Nov-06 10:50

I'm not shure to understand your profiling conclusion (maybe because .NET is new for me)
what does it mean "no managed resources causes this" ?
is it a problem that GC occurs each 5 sec ? is it too much or too less ?

Guffa4-Nov-06 13:20

Guffa

4-Nov-06 13:20

Fabrice Deshayes aka Xtream wrote:
I'm not shure to understand your profiling conclusion (maybe because .NET is new for me)
what does it mean "no managed resources causes this" ?

It means that the managed heap does not grow.

is it a problem that GC occurs each 5 sec ? is it too much or too less ?

Not really, but it's a bit much concidering that the program isn't really doing anything...

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b { font-weight: normal; }

STOPing WebBrowser

Nadia Monalisa3-Nov-06 4:34

3-Nov-06 4:34

Hi,
within my code,
webBrowser1.Stop() method is simply not stopping navigating. Is there any other alternative way available to STOP loading current navigating page of a WebBrowser Control ?

thanks

ed^nrgc3-Nov-06 5:00

3-Nov-06 5:00

What exactly is happening?

Nadia Monalisa3-Nov-06 5:20

3-Nov-06 5:20

Thanks for reply,
The event handler of a button is responsible for executing the following code,
weBrowser1.Stop();
But When I click the button, I see that the webBrowser is still trying to load the navigating web page and stops when it fisnihed loading, and sometimes it takes long time to load a huge page. I also verified that the event handler is really working, so there is no chance that, I clicked the Button to Stop WebBrowser but weBrowser1.Stop(); is not being executed. I am wondering, why the WebBrowser is not Simply being Stopped !!!

ed^nrgc3-Nov-06 5:26

3-Nov-06 5:26

So, as an example, you have code similar to:

private void stopButton_Click(object sender, EventArgs e)
{
webBrowser1.Stop();
}

Correct?

Have you placed a breakpoint on the stop line to see if it's actually being called?

Nadia Monalisa3-Nov-06 5:29

3-Nov-06 5:29

YEs, Right, My code is exactly like that and I placed breakpoint and also placed MessageBox.Show("I am inside the event handler") code to confirm that the event handler is really being called.

Xml

V.3-Nov-06 4:26

3-Nov-06 4:26

Guys,

I'm trying to write some classes so I can handle XML files more easily. I'm having quite some difficulty with the terminology of the Framework.
Are there some good tutorials out there that are clear? (I quickly searched CP, but couldn't find anything right away).

My goal is to be able to load/save (this one's OK) and modify/read the XML. I'm having difficulty with the terminology element/node/attribute.
I was thinking that an element and a node was the same and they have attributes, but after playing with it, that doesn't seem to be the case?

Any links/tutorials?

many thanks!

V.
Stop smoking so you can: enjoy longer the money you save.

Nadia Monalisa3-Nov-06 4:31

3-Nov-06 4:31

The following link will show you the best XML tutorial I have ever found in the internet. This Tutorial will not will teach u XML, but also teach u how to work with XML in C#.NET.

good luck.

http://www.functionx.com/xmlnet/index.htm[^]

V.3-Nov-06 10:51

3-Nov-06 10:51

thanks a lot, the first thing showing up in google was a java snippet although the title on top of the page said C# D'Oh! | :doh:

V.

Stop smoking so you can: Enjoy longer the money you save.
Moviereview Archive

Stefan Troschuetz3-Nov-06 4:42

Stefan Troschuetz

3-Nov-06 4:42

Elements and attributes are all XML nodes. A XML node is the basic building block of a XML document and besides the both named at the beginning there are some other types of XML nodes e.g. the XML declaration. To see what types are distinguished by the .NET Framework take a look at the XmlNodeType enumeration.

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de