C# Discussion Boards - CodeProject

S. Senthil Kumar12-Aug-05 20:05

12-Aug-05 20:05

Did you try using Spy++ and watching what happens when you paste text into the richtextbox.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: RichTextBox WndProc WM_PASTE

mmr_muthu13-Aug-05 3:45

mmr_muthu

13-Aug-05 3:45

Hi senthil, thanks for your reply. But i am not aware of spy++ tool,could you tell me where can i download and how can i utilize that to check the paste operation.

Thanks
Muthu.

Re: RichTextBox WndProc WM_PASTE

mmr_muthu13-Aug-05 6:07

mmr_muthu

13-Aug-05 6:07

Thanks senthil, i have seen spy++, but it is not logging the message when i click ctrl+v for rich textbox. But if i use textbox the message WM_PASTE is logged.Is it a problem in .NET RichTextBox..??

Extracting info from Exchange

Barm11-Aug-05 18:35

Barm

11-Aug-05 18:35

I have a form-based user for a user to select recepient from the current email addresses in the exchange server. How do I go about extracting this address list from MS Exchange?

Thomas

Best Practice of setting value of ComboBox

econner11-Aug-05 18:27

econner

11-Aug-05 18:27

I have a form that contains a combobox with values of item1, item2, and item3. I am wanting to retrieve a value from a database and select the correct value from the options of the combobox during the loading of the form. What might be the best way to do this?

Re: Best Practice of setting value of ComboBox

Christian Graus11-Aug-05 18:38

Christian Graus

11-Aug-05 18:38

Just set the text property of the combobox.

Christian Graus - Microsoft MVP - C++

Size of arrayList

binglin11-Aug-05 18:09

binglin

11-Aug-05 18:09

i want to do a for loop for an ArrayList

this is what i thought of:

for(int i=0;i

Re: Size of arrayList

Luis Alonso Ramos11-Aug-05 19:58

Luis Alonso Ramos

11-Aug-05 19:58

It has a Count property.

But you could as well do:

foreach(YourTypeOfObjetct obj in myArrayList)
{
    // Do whatever with the obj variable.
}

I hope this helps.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

The amount of sleep the average person needs is five more minutes. -- Vikram A Punathambekar, Aug. 11, 2005

Re: Size of arrayList

binglin11-Aug-05 20:56

binglin

11-Aug-05 20:56

so does this looks right?

foreach(byte[] frame in frames){}

Re: Size of arrayList

Luis Alonso Ramos11-Aug-05 20:59

Luis Alonso Ramos

11-Aug-05 20:59

Are each of the elements in frames arrays of bytes? For example, does this code

byte b = frames[0][3];

get the fourth byte of the first frame?

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

The amount of sleep the average person needs is five more minutes. -- Vikram A Punathambekar, Aug. 11, 2005

Re: Size of arrayList

binglin11-Aug-05 23:22

binglin

11-Aug-05 23:22

yup, the elements are in bytes

so how can i do a constant check on the arraylist and run the loop?

Re: Size of arrayList

mav.northwind12-Aug-05 0:57

mav.northwind

12-Aug-05 0:57

As Luis Alonso already pointed out, you should use the Count property of ArrayList.

Regards,
mav

Re: Size of arrayList

S. Senthil Kumar12-Aug-05 20:10

S. Senthil Kumar

12-Aug-05 20:10

Is each element in the arraylist a byte or a byte[]?

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Displaying text in windows forms

binglin11-Aug-05 18:08

binglin

11-Aug-05 18:08

Need help on displaying text on a C# windows application

I'm not familar with C# but what i want is something like a JTextField in a java applet

thanks!
-------------------------------------------------
BingLin

Re: Displaying text in windows forms

Roman Rodov11-Aug-05 20:06

Roman Rodov

11-Aug-05 20:06

Well why don't you get yourself familiar with C# and .NET first? Like read MSDN?
Anyway, System.Windows.Forms.TextBox is what you need for input and System.Windows.Forms.Label is what you need for just a static display.

Re: Displaying text in windows forms

binglin11-Aug-05 20:57

binglin

11-Aug-05 20:57

alright, thanks for the help!

Suggestions for debugging TreeView problem

stevoe7211-Aug-05 16:32

stevoe72

11-Aug-05 16:32

Hi,

I am getting the following NullReferenceException, erratically, from the System.Windows.Forms.TreeView component. As the stack trace shows, none of my code is *directly* involved in the exception. The exception seems to occur in response to an event that occurs after I perform some action on the TreeView...however, I cannot reliably reproduce the error, so I cannot determine which action preceeds the error.

Does any one have have any suggestions of approaches I can use to narrow down the cause of this error?

Thanks,
Steve.

Exception type: System.NullReferenceException Object reference not set to an instance of an object. at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam) at System.Windows.Forms.NativeWindow.DefWndProc(Message& m) at System.Windows.Forms.Control.DefWndProc(Message& m) at System.Windows.Forms.Control.WmDestroy(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.TreeView.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Re: Suggestions for debugging TreeView problem

Susan Hernandez31-Aug-05 13:50

Susan Hernandez

31-Aug-05 13:50

stevoe72 wrote:
I am getting the following NullReferenceException, erratically, from the System.Windows.Forms.TreeView component. As the stack trace shows, none of my code is *directly* involved in the exception.

Did you ever get an answer to this question you posted on CodeProject? I am having similar problems, and don't know where the error is coming from. If you figured out where to look, I'd appreciate if you'd let me know. In my application, my users are seeing this error but I can't reproduce it.

Error Messages:<br />
Object reference not set to an instance of an object.<br />
	  Inner Stack Trace: <br />
	   at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)<br />
   at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)<br />
   at System.Windows.Forms.Control.DefWndProc(Message& m)<br />
   at System.Windows.Forms.Control.WmUpdateUIState(Message& m)<br />
   at System.Windows.Forms.Control.WndProc(Message& m)<br />
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)<br />
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)<br />
   at System.Windows.Forms.ParkingWindow.WndProc(Message& m)<br />
   at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)<br />
   at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)<br />
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Thanks for any help.
Sue

Re: Suggestions for debugging TreeView problem

stevoe7231-Aug-05 14:08

stevoe72

31-Aug-05 14:08

I'm afraid that I did not have any luck establishing the cause of this error, Susan...though we do *appear* to have stopped the error occurring (for the time being).

We started to suspect that the problem was somehow related to a panel, on my form, which was initially not visible when the form was displayed. My form had two "modes" of display. When the user switched mode, I would make the panel (and it's child controls) to be visible. When they switched modes again, the panel would be made invisible. From reading articles like the following, we began to suspect that there may be problems related to having a control that was initially non-visible:

http://www.dotnet247.com/247reference/msgs/57/285567.aspx[^]

http://www.tech-archive.net/Archive/DotNet/microsoft.public.dotnet.framework.windowsforms/2005-01/1163.html[^]

In the end, I split my form into 2 forms (one for each mode). I was able to remove the dynamic-nature of each form. All controls are visible when the form is first displayed. And the error seems to have stopped happening.

To me, it looks like the real error is occuring down in non-managed code. I don't know how to extract any further details from an error that occurs at such a level.

Hope some of this info is helpful to you. Sorry that I cannot provide a more definitive answer.

Cheers,
Stephen.

Re: Suggestions for debugging TreeView problem

Susan Hernandez31-Aug-05 14:14

Susan Hernandez

31-Aug-05 14:14

Actually, that may be the answer. We have several forms where we have initially non-visible panels with more controls in them. For instance if a user tries to type in a new address which is wrong, a panel becomes visible with a drop-down list of possible city/states.

Thanks very much for the links. I will look in to this, and play a little with visible/non-visible.

Smile | :)

Susan

apply control panel settings

Pyro Joe11-Aug-05 15:05

Pyro Joe

11-Aug-05 15:05

hi, I simply want to change the registry value "swapmousebuttons", I can do this. however I want to apply this setting without rebooting or logging off, much like the windows control panel does. how is this done? thanks for your help.
Stephen

Re: apply control panel settings

Mohamad Al Husseiny11-Aug-05 15:22

Mohamad Al Husseiny

11-Aug-05 15:22

You can use SwapMouseButton Api function

[DllImport("user32.dll")]
static extern bool SwapMouseButton(bool fSwap);

and somewhere write code like that

private void button3_Click(object sender, System.EventArgs e)
{
SwapMouseButton(true);
}

To set it back pass false value

SwapMouseButton Function[^]
MCAD

Re: apply control panel settings

Pyro Joe11-Aug-05 15:46

Pyro Joe

11-Aug-05 15:46

thanks a ton! it works perfectly.

MyDocument Special Folder

monrobot1311-Aug-05 14:21

monrobot13

11-Aug-05 14:21

I'm trying to find the path to the My Documents folder using the Environment.SpecialFolder enum, Path.GetFullPath (Environment.SpecialFolder.MyDocuments.ToString ()); but all that it's retuning to me is the full path to my executeable with "Personal" appended to the end. How do you use this enum to actually find the "My Documents" folder?

Thanks for the help.

- Aaron

Re: MyDocument Special Folder

Christian Graus11-Aug-05 14:33

Christian Graus

11-Aug-05 14:33

Environment.GetFolderPath( Environment.SpecialFolder.whatever)

Christian Graus - Microsoft MVP - C++

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