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I have a form which is set as the MdiParent and I open a modal form which is a login form. I want to open a MdiChild form if login is successful.
I would usually set the MdiChild as below but as the login form is not the MdiParent how do I set the parent of the new Mdi form since I can't use the this keyword.
fManagerChild ChildForm = new fManagerChild();
ChildForm.MdiParent = this;
ChildForm.Show();
The forms are called: fManager (MdiParent), fLogin (Modal Form), fManagerChild (MdiChild)
Thanks
Neil
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Is this what you are after?
ManagerChild ChildForm = new fManagerChild();
ChildForm.MdiParent = this.Owner;
ChildForm.Show();
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Has anyone seen any articles on how to do this:
For example, the ASP.NET Validator Controls allow you to select a ControlToValidate in the property table. It's stored as a string, but if you click the drop down button, you get a list of all your controls that support the ValidationPropertyAttribute.
How does it do this? Does it use the attribute somehow?
What I'd like to do is show a list of all MenuItems, so if the concept requires the attribute then I could be onto a non-starter. But it would be a nifty feature for what I'm trying to do.
Paul
We all will feed the worms and trees
So don't be shy - Queens of the Stone Age, Mosquito Song
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I think those are refered to as TypeDescriptors in design mode. Frankly, I wish I could figure out how to debug designer code could within VS.NET.
HTH 
I rated this article 2 by mistake. It deserves more. I wanted to get to the second page... - vjedlicka 3:33 25 Nov '02
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leppie wrote:
I think those are refered to as TypeDescriptors in design mode
leppie,
Never found chance to thank you for this reply.
Did it help me? Well, it gave me something new to learn about... and then I discovered that you could just define the property as type MenuItem and it gives you a DropDownList of MenuItems in the form automatically, so learning it was completely useless but cool anyway
Paul
We all will feed the worms and trees
So don't be shy - Queens of the Stone Age, Mosquito Song
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When a Socket got data , I receive it and save it to a *.wav file , play it immediately., my code is under next line .
-------------------------------------------------------
byte[] receive = _server.GetReceiveData();
ff++; // just a counter
statusBar1.Text = "Receive!!!" + receive.GetUpperBound(0) +" "+ff ;
FileName = "receive.wav";
CreateRIFF(); // A function to Create a RIFF, do not look this
Writer.Write(receive);
count = receive.Length ;
Writer.Seek(4, SeekOrigin.Begin);
// Seek to the length descriptor of the RIFF file.
Writer.Write((int)(receive.Length + 36));
// Write the file length, minus first 8 bytes of RIFF description.
Writer.Seek(40, SeekOrigin.Begin);
// Seek to the data length descriptor of the RIFF file.
Writer.Write(receive.Length);
// Write the length of the sample data in bytes.
Writer.Close(); // Close the file now.
Writer = null; // Set the writer to null.
WaveFile = null; // Set the FileStream to null.
//----------------------------------------------------------
//!!!!Problem , when program run to here , yes , it can create a buffer,
//but it just play three times and then can't play anymore !!
//mind that this case is a OnReceiveEvent called when Socket got data.
//The Frequention perhaps ten times a second.
Buffer p = new Buffer("receive.wav",applicationDevice_buffer);
p.Play(0, BufferPlayFlags.Default);
//----------------------------------------------------------------
textBox1.Text = "Receive and played!!!" + receive.GetUpperBound(0) "+(ff) ;
Something happened let I can't receive the data since ff > 3 , can anyone solve this problem ?
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hi peoples.... i need to find away to get the count of event handlers prescribed to a Timer.Tick method. Is there away ? or as a alternitive but working just as well.....is the best way just to re-initialize the variable agian?
thanks....
Jesse M
The Code Project Is Your Friend...
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To do that, you would need access to the delegate the Timer uses. In both Timer classes, System.Timers.Timer and System.Windows.Forms.Timer, this is marked as private. So in short, no.
Why would you need to know this?
Hawaian shirts and shorts work too in Summer.
People assume you're either a complete nut (in which case not a worthy target) or so damn good you don't need to worry about camouflage...
-Anna-Jayne Metcalfe on Paintballing
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well i have a timer that performs a calculation.... i can add as many events to it as i want (say i add five... Timer.Tick += ect) but i want to remove all the previous Tick Eventhandlers to ensure that i have no more then 5 attached to it. (the reason i want so many is that they will all be pointed to the same method, thus doing the calculation X times per cycle as aposed to one).
Any ideas / suggestions ?
Jesse M
The Code Project Is Your Friend...
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While doing a stupid class project* I paid a visit to WindowsForms.net and ran across this little gem:
RegionMaster Controls[^]
I just glanced through the documentation and it looks pretty cool, though I haven't got a chance to dive into the source yet. Back to my proj. I've got less than two hours to include a bunch of garbage 
*The project was actually ok until I read through the requirements and found I needed to include a sample of every little feature of powerpoint...
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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Interesting... 
Thanks for telling us about them.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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You don't do blogging do you James? That was circulating around the blogging world a couple of weeks ago.
Hawaian shirts and shorts work too in Summer.
People assume you're either a complete nut (in which case not a worthy target) or so damn good you don't need to worry about camouflage...
-Anna-Jayne Metcalfe on Paintballing
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David Stone wrote:
You don't do blogging do you James?
Nope, I pretty much stick to CP; though I have started reading Chris Brumme's blog. Maybe one of these days I'll get into the whole blog thing
David Stone wrote:
That was circulating around the blogging world a couple of weeks ago.
Then why didn't you post it 
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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James T. Johnson wrote:
Nope, I pretty much stick to CP; though I have started reading Chris Brumme's blog.
I was going to mention him to you...my head swims when I read that stuff. 
Hawaian shirts and shorts work too in Summer.
People assume you're either a complete nut (in which case not a worthy target) or so damn good you don't need to worry about camouflage...
-Anna-Jayne Metcalfe on Paintballing
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David Stone wrote:
my head swims when I read that stuff.
I can digest bits and pieces of it, I still don't get everything about his latest post.
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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James T. Johnson wrote:
I needed to include a sample of every little feature of powerpoint...
Sometimes I'm still glad we are working on Linux
I rated this article 2 by mistake. It deserves more. I wanted to get to the second page... - vjedlicka 3:33 25 Nov '02
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System.Net.IPEndPoint broadCastEndpoint=new IPEndPoint(System.Net.IPAddress.Broadcast,BGAME_PORT);
while(broadCastFlag)
{
try{
bsocket.SendTo(buffer,buffer.Length,SocketFlags.None,broadCastEndpoint);
Thread.Sleep(BGAME_INTERVAL);
}
catch(System.Net.Sockets.SocketException e)
{
System.Console.Out.WriteLine(e.ToString());
}
}
I just wanna broadcast a UDP packet to the LAN, as u see above. but when the code runs to 'Send to' method, an exception is throwed and tell me that 'attempt to access the socket in a unauthorized way'
Why?
Thanks.
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Hey, I append text to a textbox in a c# web form, and i just want the scroll bar in the text box to automatically jump to the bottom so the user can see the new text. Similar to Windows Messenger which moves to the bottom as text is appended to the textbox from what u type in the send text box and send or what is received from your friend your chatting with.
Any suggestions??
I'm using myTextBox.Text += "\n\rHello There!";
Is it any different if i were to use myTextBox.AppendText( "\n\rHello There!" );
It states they are the same in the .net class library.
Can I set the position of the caret, so that i can call SetFocus() and then call ScrollToCaret()?? If this would work, how can i set the position of the caret??
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Haven't dealt with it much in C#, but with all of the VB text boxes I've worked with, it works even without the ScrollToCaret() or SetFocus() thing.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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Yeah, I never saw the method TextBox.AppendText() untill I was writing the first post, i was using the TextBox.Text += "", and the .Net Class Library says those 2 ways are the same. However, += does not advance the scroll bar, but AppendText() does. You must be using the method AppendText() then (but im not familiar with VB). Thanks for the reply though.
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You do have to set the caret position, though.
"Do unto others as you would have them do unto you." - Jesus
"An eye for an eye only makes the whole world blind." - Mahatma Gandhi
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OK, I hvae a class Foo that holds a Brush.
Since Brush holds an unmanaged resource and implements IDisposable, I guess Foo has to implement IDisposable as well.
However, I'm still mixed up about Dispose, Finalize, and the recommended Dispose(bool disposing).
What's the "true" method to do here? Just
class Foo : IDisposable
{
protected Brush m_brush = null;
Dispose()
{
m_brush.Dispose();
m_brush=null;
};
} or is there more to it=
I know someday I'll get it 
TIA
(Just today I found an article that explaiend it nicely - but it's poof! gone..)
"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS
sighist | Agile Programming | doxygen
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Ok, here's my understanding of it:
The Dispose method should be used to explicitly free up any internal resources, especially unmanaged ones such as handles etc. However, as far as I remember you should also call the Dispose method of an inherited class (if you have done so.
One other thing (although this is the big I'm shaky on -- haven't been doing this for a while now  ), you may also be able to suppress any additional GC finalisation. To do this, the GC class has a SuppressFinalisation method or something. This is the bit I'd check up on in the docs, but as far as I know you seem fine.
However, I also think that its important for calling code to call your Dispose method. Of course, this then means making sure that should an exception be thrown, the Dispose method is still called. Consequently, you'll want to add a call to Dispose in the finally{} block.
In C#, you may also want to check out the using() keyword, but I don't use it that often, I find it easier to read if I explicitly call Dispose where necessary -- which kinda makes me think decent commenting/documenting is a good idea, which of course I abide by 
--
Paul
"Put the key of despair into the lock of apathy. Turn the knob of mediocrity slowly and open the gates of despondency - welcome to a day in the average office."
- David Brent, from "The Office"
MS Messenger: paul@oobaloo.co.uk
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peterchen wrote:
However, I'm still mixed up about Dispose, Finalize, and the recommended Dispose(bool disposing).
Finalize is the closest equivalent to C++ destructors that .NET has. The difference is that in .NET you can only clean up ValueType-based variables, in other words, IntPtr's that represent handles for P/Invoke use. This is because there is no guarantee on the order in which reference based (ie non-value types) will be Finalized.
That isn't very helpful in the long run, so the IDisposable interface came about so you could free up your managed resources. For example, flush a FileStream then close it. Because the FileStream uses a managed byte array to buffer the data you cannot use that byte array within the Finalize method. Sticky sticky.
Now to get to your question
When Finalize is called we know we can only deal with unmanaged resources, but when Dispose is called we can deal with both. Rather than have two places to dispose of unmanaged resources MS came up with another pattern to use, this time it is a protected method that takes a bool.
protected void Dispose(bool disposing)
Both Finalize and the public Dispose methods should call this method to do the dirty work work. The bool tells if you can dispose of managed resources (ie Dispose was called). If it is false then you should only get rid of unmanaged resources.
Now to tie it all together:
class MyClass : IDisposable
{
Brush myBrush;
IntPtr myHandle;
...
~MyClass
{
Dispose(false);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected void Dispose(bool disposing)
{
if( disposing )
{
if( myBrush != null )
myBrush.Dispose();
myBrush = null;
}
FreeSuppaHandle(myHandle);
}
}HTH,
James
"It is self repeating, of unknown pattern"
Data - Star Trek: The Next Generation
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Hi,
How (or how much) does the .NET framework support editing the properties of a class?
I have a class which contains and manages a "color scheme" (i.e. mostly Colors and Fonts), and would like to allow the user editing it in a property list.
is there something already provided? Can I "plug in" the editing of a custom class? Or do I have to do it on my own?
TIA
Peter
"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS
sighist | Agile Programming | doxygen
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