C# Discussion Boards - CodeProject

Alomgir Miah20-Jul-05 10:00

20-Jul-05 10:00

Please note that the environment variables created within the application will not be
available after the application exits.

Re: getting an enviorment variable

Vasudevan Deepak Kumar21-Jul-05 3:16

Vasudevan Deepak Kumar

21-Jul-05 3:16

Hi:

Check out this:

System.Environment.GetEnvironmentVariables()

Deepak Kumar Vasudevan
Personal Web: http://vdeepakkumar.netfirms.com/
I Blog At: http://deepak.blogdrive.com/

network discovery

ingenious^^20-Jul-05 8:27

ingenious^^

20-Jul-05 8:27

hi ...i want to know tht how can we discover whole network in such a way that just enter the IP address, then discover and scan all devices and network attached to system and keep on scanning until reach at some dead end.
plz gime the hint how can we do ht in c#.net ...thank u

ingenious

Return string from native code to C# using SendMessage

Roman Muntyanu20-Jul-05 7:23

Roman Muntyanu

20-Jul-05 7:23

Hi all,

In C# system service I need to get some string from MFC mainframe
window by SendMessage() API call. I managed to send message, but can
not find the way to return string to C# app.
I tried to use lParam:

C# side
StringBuilder sb = new StringBuilder(256);
SendMessage(process.MainWindowHandle, WM_GET_AUTH_MEMBER, 0, sb);

C++ side
CString member = "SomeString";
strcpy((char*)lParam, member.GetBuffer());

Then on C# side sb has not been changed
Any idea ?
Please if someone did it post the example,

I would greatly appreciate,
Roman

Re: Return string from native code to C# using SendMessage

Luis Alonso Ramos20-Jul-05 14:19

Luis Alonso Ramos

20-Jul-05 14:19

Are you trying to do this between different processes? I don't thing the conversion from a NULL-terminated native string to a .NET string object is the problem.

Take a look at this post from two days ago. I explained why you can't pass strings with interprocess custom messages.

http://www.codeproject.com/script/comments/forums.asp?msg=1166662&forumid=1649&XtraIDs=1649&searchkw=WM_COPYDATA&sd=4%2F21%2F2005&ed=7%2F20%2F2005#xx1166662xx[^]

I hope it helps. Good luck!

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

Auto Arrange desktop icons

kevin_smoke20-Jul-05 7:00

kevin_smoke

20-Jul-05 7:00

How can i make auto arrange for the desktop icons on my desktop using C#.net

kevin smoke

Re: Auto Arrange desktop icons

Alomgir Miah20-Jul-05 12:27

Alomgir Miah

20-Jul-05 12:27

try this
private void button1_Click(object sender, System.EventArgs e)
{
SendMessage(GetDesktopWindow(), LVM_ARRANGE, LVA_SNAPTOGRID , 0);
}

public const int LVM_ARRANGE = 4118;
public const int LVA_SNAPTOGRID = 5;

[DllImport("User32.dll", CharSet=CharSet.Auto)]
public static extern IntPtr GetDesktopWindow();

[DllImport("user32.dll")]
public static extern int SendMessage( IntPtr hWnd, uint Msg, int wParam, int lParam );

Alomgir Miah
Live Life King Size

Re: Auto Arrange desktop icons

kevin_smoke20-Jul-05 23:37

kevin_smoke

20-Jul-05 23:37

thanks alot, it worked correctly.

kevin smoke

Re: Auto Arrange desktop icons

Sabry190521-Jul-05 2:23

Sabry1905

21-Jul-05 2:23

i had asked about the same later in the message board , but i didnt got an answer for it , till u give me a one, i did all u did except sending the right message 4118, so i am wondering is there any very detailed refrence for all windows messages with examples , i am using spy++, but sometimes i cant catch what i want exactly from it

so can u or any one here can give me the right way or refrence
thx alot in advance Smile | :)

Re: Auto Arrange desktop icons

Alomgir Miah21-Jul-05 3:40

Alomgir Miah

21-Jul-05 3:40

Do a search in MSDN. Everything is there.

www.msdn.microsoft.com

Re: Auto Arrange desktop icons

Alomgir Miah21-Jul-05 3:40

Alomgir Miah

21-Jul-05 3:40

Do a search in MSDN. Everything is there.

www.msdn.microsoft.com

Alomgir Miah
Live Life King Size

System Time

BrunoZP20-Jul-05 6:53

BrunoZP

20-Jul-05 6:53

Hi, I would like to knw if anynone knows how to adjust windows Time, through an application in C# ???

Thanks
Bruno

-----------------------------
Visite: http://zopostyle.com

DataGrid Question

zaboboa20-Jul-05 6:29

zaboboa

20-Jul-05 6:29

Hello,

1.
Is there a way of making a column in datagrid as a combobox.
So when the user wants to modifiy the fields in the datagrid, and
clicks in particular cell, the dropdown list will appear, and he can only choose the values from the list as a value for the cell.

2. How can you format row in datagrid, so that the row spans the whole
lenght of the datagrid, and does not stop in the middle, etc..

Thank you.

Re: DataGrid Question

Alomgir Miah20-Jul-05 12:31

Alomgir Miah

20-Jul-05 12:31

try

http://www.codeproject.com/cs/miscctrl/datagridcomboboxcolumn.asp

To do custom formatting use

DataGridTableStyle and DataGridTextBoxColumn etc.

http://www.syncfusion.com/FAQ/WindowsForms/Default.aspx#44

has bunch of information

Alomgir Miah
Live Life King Size

Serializing multiple objects to the same disk file

cab320-Jul-05 6:18

cab3

20-Jul-05 6:18

Hi,

I was hoping someone might help me with a with a serialization problem. I am trying to serialize multiple objects to the same disk file. Below is the code I am using to save and restore an individual object, however I really need to save many objects to disk.

Any thoughts and help would be very much appreciated.

<br />
static void saveFile()<br />
{<br />
IFormatter formatter = new BinaryFormatter();<br />
Stream stream = new FileStream("2005.pp1", FileMode.Create, FileAccess.Write, FileShare.None);<br />
formatter.Serialize(stream, PPeriod);<br />
stream.Close();<br />
}<br />
static void restoreFile()<br />
{<br />
IFormatter formatter = new BinaryFormatter();<br />
Stream stream = new FileStream("2005.pp1", FileMode.Open, FileAccess.Read, FileShare.Read);<br />
PayPeriodSerial = (PayPeriods) formatter.Deserialize(stream);<br />
stream.Close();<br />
}<br />

cab3

Re: Serializing multiple objects to the same disk file

mav.northwind20-Jul-05 6:48

mav.northwind

20-Jul-05 6:48

Hi!
You can simply serialize more than one object to the same stream:

IFormatter formatter = new BinaryFormatter();<br />
Stream stream = new FileStream("2005.pp1", FileMode.Create, FileAccess.Write, FileShare.None);<br />
formatter.Serialize(stream, PPeriod1);<br />
formatter.Serialize(stream, PPeriod2);<br />
formatter.Serialize(stream, PPeriod3);<br />
stream.Close();

You'll get all the objects when deserializing in exactly the same way.

Regards,
mav

Re: Serializing multiple objects to the same disk file

cab320-Jul-05 7:57

cab3

20-Jul-05 7:57

Hi,

Thanks for the quick response, it worked just fine.

Thanks again,

cab3

Remoting Issue

Anonymous20-Jul-05 5:06

Anonymous

20-Jul-05 5:06

Hi. I have a GUI-Service remoting relationship set up with 2 remotable objects (1 used for sending messages from the service to the GUI to be displayed and 1 for user requests to be sent from the GUI to the service). The remoting is working well...except that for I receive multiple calls on the receiving end of the remoting. As I debug, I only encounter my call one time, but on the receiving end, there will be 2 occurrences. I must have something set up not quite right here - has anyone experienced this or have any tips that may help?

Thank you,
Dusty

Re: Remoting Issue

Anonymous20-Jul-05 9:15

Anonymous

20-Jul-05 9:15

I figured it out. Had the eventhandler wired up twice - figured it must be something like that!

Have a great day!

Remoting - re-establishing the connection

Judah Gabriel Himango20-Jul-05 4:31

Judah Gabriel Himango

20-Jul-05 4:31

I'm using a custom bi-directional TCP channel to do my remoting. Using this channel, the client can receive messages back from the server once the client connects to the server.

My problem is that over a WAN/Internet environment, my custom channel is getting disconnected for no apparent reason. I have 2 questions: should I expect unstable connections over WAN/Internet? And also, to re-establish a connection, is it better to reconnect to the server objects, or go into the disconnected channel and try to re-establish the socket connection?

If anyone can answer either of these questions, or point me in the right direction, I'd appreciate it.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

Re: Remoting - re-establishing the connection

Tom Larsen20-Jul-05 9:33

Tom Larsen

20-Jul-05 9:33

Networks by their very nature can be disconnected. It is just like file permissions, memory allocation, and other limited resources. Any networked system should be designed in such a way that it will deal if one side can not contact the other.

Another thing to keep in mind is that with .Net Remoting, objects are kept alive by leases so it is not dependent on the client side to constantly make "pings". You may want to twiddle the settings found in the LifetimeServices class, especially the RenewOnCallTime. It may very well be the reason why the system is failing is because the server got rid of its representation of the object because it has exceed its lifetime. This should be an obvious exception though and only applicable to client activated objects.

custom events

rathishps20-Jul-05 4:02

rathishps

20-Jul-05 4:02

Hi friends,
I have a doubt about a new feature, custom events in VB.NET. Do anybody know the exact equivalent in c#. If someone, please help me.

Regards,
Rathish P S

Re: custom events

Judah Gabriel Himango20-Jul-05 4:22

Judah Gabriel Himango

20-Jul-05 4:22

Yes. Create a delegate defining how your function will look like (or alternatively, use an existing delegate like System.EventHandler):

public delegate void MyDelegate(int number, string text);

Then define an event in your class:

public event MyDelegate MyEvent;

And to raise the event in your class:

if(MyEvent != null)
{
    MyEvent(5, "hello!");
}

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

Handling single pixels

Yoyosh20-Jul-05 3:54

Yoyosh

20-Jul-05 3:54

What is the best way (class?) to operate on single pixels (refering to them by for example absolute position in x,y coordinates), which will allow to set their colors in hex or maybe even move them?

thanks for help in advance

Martinez

Re: Handling single pixels

Judah Gabriel Himango20-Jul-05 4:25

Judah Gabriel Himango

20-Jul-05 4:25

You can get and set pixels of a bitmap using Bitmap.GetPixel(x, y) and Bitmap.SetPixel(x, y, Color). Unfortunately, the GetPixel & SetPixel methods are extremely slow, you might want to use the Fast Bitmap[^] class which gives fast access to pixels by using pointers and unsafe code.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Homosexuality in Christianity
Judah Himango

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