|
Excellent. Thank you. It makes sense now why I can't see the output.
|
|
|
|
|
Hello to all.
I have a function that according to some criteria creates zedGraph curves for display in a graph.
the function is as follows(cut):
private void createCurves(ZedGraphControl zgc)
{
ColorSymbolRotator rotator = new ColorSymbolRotator();
#region create curves as needed
for (int i = 0; i < lgControlsPanel.Controls.Count; i++)
{
if (lgControlsPanel.Controls[i] == angleCheckBox)
if (angleCheckBox.Checked)
{
foreach (string key in valveCheckedListBox.Items)
{
if (valveCheckedListBox.CheckedItems.Contains(key))
{
zgc.GraphPane.AddCurve(key + ": Angle", anglePointArr[HexToLong(key)], rotator.NextColor, rotator.NextSymbol);
}
}
}
.
.
.
zgc.AxisChange();
}
The problem I encounter is that if I call this function from the main thread that craeted the form
on which the zedGraphControl is placed, everything is going fine.
BUT, if I let a new thread handle it, it does all operations fully but isn't refreshing the graph
view until I live the form and return to it.
only then do I see the changes.
here is my new thread call:
<br />
Thread startCreateCureves = new Thread(delegate() { createCurves(zgc); });<br />
startCreateCureves.Start();
of course I tried already to use invoke method and refresh with no luck:
private void createCurves(ZedGraphControl zgc)
{
if (zgc.InvokeRequired)
{
createCurvesHandler d = new createCurvesHandler(createCurves);
this.Invoke(d, new object[] { zgc });
}
ColorSymbolRotator rotator = new ColorSymbolRotator();
#region create curves as needed
for (int i = 0; i < lgControlsPanel.Controls.Count; i++)
{
I also tried it with: this.Invoke(), and NADA.
can someone please explain to me the weird phenomenon?
thanks in advanced.
|
|
|
|
|
Hi again,
this is similar to your previous topic:
1. yes, when not running on the thread that created the Control, you must use
Control.InvokeRequired and Control.Invoke()
2. the thing your thread is not allowed to do should be in the ELSE part of the
if(Control.InvokeRequired) which means it does not execute on the
wrong thread, but it does execute on the right thread. The way you wrote it, it
would be executed twice.
If this wrong way of doing Control accesses does not throw an InvalidOperationException
(with some "illegal cross-thread operation" message) it indicates that you (or your
Control provider):
- either are running on an older .NET version (1.0 or 1.1), if so, why?
- or have done something to suppress exceptions (e.g. set Control.CheckForIllegalCrossThreadCalls false, very bad idea)
- or have done something to ignore exceptions (e.g. an empty catch block, very very bad idea)
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
|
|
|
|
|
HI,
I didn't do any action to suppress any thing. in every other case I do get these
exceptions, only in this case I do not.
I don't know why it's like that.
but the most peculier part is that if I leave the form and then return to it,
I can see the changes made, and they are correct.
|
|
|
|
|
Hi,
this may indicate that you should Invalidate() the ZedGraph Control as Patrick suggested.
And maybe they did set CheckForIllegalStuff=false internally!?
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
|
|
|
|
|
thank you man, you really helped me a lot.
I appreciate it.
|
|
|
|
|
You're welcome.
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
|
|
|
|
|
There's only one thing missing from your code:
You need to be calling zgc.Invalidate() or zgc.Refresh() after calling AxisChange(). It won't repaint anything until something tells it to; this is one of the ways ZedGraph maintains performance. It doesn't refresh willy-nilly. All the AxisChange() call does is cause the ZedGraphControl to recalculate what the axis limits SHOULD be; it doesn't cause the control to actually display them.
So all you have to do is call Refresh() on the control  Your threading looks fine. You need that Invoke() there if you're going to be running the code on a separate thread. You should call "return" inside that if() statement after calling Invoke() though, otherwise it will continue to run the code below, as Luc pointed out.
"If you think of yourselves as helpless and ineffectual, it is certain that you will create a despotic government to be your master. The wise despot, therefore, maintains among his subjects a popular sense that they are helpless and ineffectual."
- Frank Herbert
|
|
|
|
|
where do I call the zgc.Refresh() or invalidate?
right after axischange() in the same thread like this:
private void createCurves(ZedGraphControl zgc)
{
if (zgc.InvokeRequired)
{
createCurvesHandler d = new createCurvesHandler(createCurves);
this.Invoke(d, new object[] { zgc });
}
else
{
ColorSymbolRotator rotator = new ColorSymbolRotator();
#region create curves as needed
for (int i = 0; i < lgControlsPanel.Controls.Count; i++)
{
if (lgControlsPanel.Controls[i] == angleCheckBox)
if (angleCheckBox.Checked)
{
foreach (string key in valveCheckedListBox.Items)
{
if (valveCheckedListBox.CheckedItems.Contains(key))
{
zgc.GraphPane.AddCurve(key + ": Angle", anglePointArr[HexToLong(key)], rotator.NextColor, rotator.NextSymbol);
}
}
}
.
.
.
zgc.AxisChange();
zgc.Refresh();
}
|
|
|
|
|
thank you man, you really helped me a lot.
I appreciate it.
|
|
|
|
|
No problem
"If you think of yourselves as helpless and ineffectual, it is certain that you will create a despotic government to be your master. The wise despot, therefore, maintains among his subjects a popular sense that they are helpless and ineffectual."
- Frank Herbert
|
|
|
|
|
How can I programatically add/remove appletalk,ipx,tcp/ip protocols from network connection ?
This is a regulatory requirement for our network to allow only certain protocols.
Any help is god's grace
h.
Before c# there was darkness
|
|
|
|
|
Do you mean how to create Network Conections only with these Protocols?
Luis E Tineo S
|
|
|
|
|
Yeh, should be a good starting point.
Before c# there was darkness
|
|
|
|
|
I have used these links to start in the sockets world: http://msdn2.microsoft.com/en-us/library/system.net.sockets.socket.aspx and http://www.codeproject.com/useritems/Class_od_Sockets.asp.
Hope they can help!
Luis E Tineo S
|
|
|
|
|
hi, guys.
Database windows application
in windows form i have added a two textbox1 and textbox2, which should bind data into this textboxes for searching.
1. i want user to enter a code number into textbox1 and when user press enter key the datagidline which item contains should highlight and selected.
2. When user enters string(name) of the items into textbox2 should do the same as above.
anyone suggest me with a code the best way to do so?
thanks who are helping me!!
so much of happy ending...
|
|
|
|
|
mis_spelled correction
-----------------------
hi, guys.
Database windows application
----------------------------
in windows form i have added a two textbox1 and textbox2, which should bind data into this textboxes for searching.
1. i want user to enter a code number into textbox1 and when user press enter key the datagridline which item contains should highlight and selected.
2. When user enters string(name) of the items into textbox2 should do the same as above.
anyone suggest me with a code the best way to do so?
thanks who are helping me!!
so much of happy ending...
so much of happy ending...
|
|
|
|
|
I need a simple Windows XP application written in C# which has a button that begins a 3G/GPRS connection via my modem.
However, I have very little experience in C# and I can not find any material on the internet to get me started in setting up a modem for GPRS or 3G connection using C#...........any clues?
-- modified at 17:36 Thursday 18th October, 2007
|
|
|
|
|
Eurfyl wrote: I need a simple Windows XP application written in C# which includes a web page with a button
Wait, you need a Windows XP Desktop application or a Web Application? Which is it?
I don't know what GPRS or 3G is but communicating with modems is not "simple".
|
|
|
|
|
Sorry for the confusion. I have edited the initial post.
3G/GPRS is the cellular networks that surrounds us and made available from the Mobile operators. A modem in our mobile phones connects to this when e.g going on the internet. When we ring someone then we are simply dialling each other's modem numbers I think(over the GSM network) which is completely different.....
To cut the story short, GPRS and 3G are the same in effect but 3G gives faster data rates.
To go on to this cellular network, a modem is required to dial in to this network (a bit like those of you that is on dial-up internet at home).
When I use my 3G datacard (connected to my laptop) then this is in eefect a 3G modem and I can install some software, run it and I get connected to the 3G network......so I want an example code or pointers on how to write my own code to intialise and setup the modem for connection....
|
|
|
|
|
Hi there,
Have you looked at how WMI can be used to connect to the modem. I haven't done this sort of thing before, but wouldn't it be easier if your hardware manufacturer provided a SDK for the modem that you could use ?
The following PDF is the closest thing I could find about WMI and 3G device interaction.
http://www.ist-gollum.org/docs/Gollum_D21_State_of_the_Art_Public.pdf[^]
|
|
|
|
|
Should, in its manual or online, come with a list of command strings that it handles. I once worked with a company whose software required supporting modems over a strange configuration and we literally had thousands of connection strings depending on the modem manufacturer. A hayes compatible modem should carry the same minimum command set across the board.
http://www.computerhope.com/atcom.htm
Need a C# Consultant? I'm available.
Happiness in intelligent people is the rarest thing I know. -- Ernest Hemingway
|
|
|
|
|
Hi Guys,
I am currently being asked to write a code to read the messages from inbox and transfer them to another folder ?
So basically it is extracting emails from inbox and putting them in a another location.
Can you help how I can achieve this by using CDO objects or Windows Managment Information API in c#.
Thanks
Sujit
happy coding!
|
|
|
|
|
How can I get to database table data and equalize to IList ?
Actually I want to get data from Data Layer and initialize to dataGridView in the View Layer.
|
|
|
|
|
Look in the Database Articles here on CodeProject. Look for "data binding" information and examples.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
