C# Discussion Boards - CodeProject

Re: [Urgent] How to detect a timezone observes DST time or not

senorAli3312-Jul-09 2:43

12-Jul-09 2:43

To d@nish: Please have a look at http://msdn.microsoft.com/en-us/library/system.timezoneinfo.aspx[^]
.Net 2.0 does not have timezoneinfo class.

Re: [Urgent] How to detect a timezone observes DST time or not

dan!sh 12-Jul-09 2:50

dan!sh

12-Jul-09 2:50

I was speaking of this[^] class and method. It is there in .Net 2.0.

Re: [Urgent] How to detect a timezone observes DST time or not

senorAli3312-Jul-09 3:08

senorAli33

12-Jul-09 3:08

Thanks for your answer, but the method IsDaylightSavingTime is only used to indicate whether the specified date and time is within a daylight saving time period or not. It does not tell me the current timezone observes DST or not.
I want to find a way to indicate if a timezone observes DST or not. If it does then I will use the method indicating whether the specified date and time is within a daylight saving time period IsDaylightSavingTime to check for the date/time and adjust date time depend on the current time is DST or none-DST.
Hope to have your help.

How to set title for fixed rows in DataGridView object?

pascal.schwartz11-Jul-09 20:18

pascal.schwartz

11-Jul-09 20:18

Hi,
Does any one know how to set titles for the fixed row in the sample DataGridView obejct?
i just what the write the rows number on the fixed row that all.

thanks
Pascal

Re: How to set title for fixed rows in DataGridView object?

pascal.schwartz11-Jul-09 21:32

pascal.schwartz

11-Jul-09 21:32

Ok, i allready figured it out by using the HeaderCell property

dataGridView1.Rows[0].HeaderCell.Value = "title";

Thanks any way
Pascal

IMAPI v2

Jacob Dixon11-Jul-09 18:49

Jacob Dixon

11-Jul-09 18:49

I posted a while back about how to make ISO files or burn them to a cd-rom. I see that this is possible with IMAPI. Although I have read the articles about it here on codeproject, I still feel it is over my head. I was wondering if anyone knew of any books that went through this and taught you. It seems a lot of the books I see are the basics and thats it.

In my classes we learned nothing that would get me a job pretty much. I have learned everything I know from books. Heck out of my three C# classes I didn't even touch basic threading. Anyways, I'm interested in learning how to use CD-ROMs (burning, copying, etc), and was just wondering a good place to start.

import user32.dll in c# [modified]

Vivek Vijayan11-Jul-09 16:54

Vivek Vijayan

11-Jul-09 16:54

how do i import user32.dll in c# in the below written code
for invoking start button
urgent please....

since this is not working

private void page_Load
{
if(condition)
{
//invoke the start key. i want the menu to pop up just as we click the start menu
SendKeys.Send("^{ESC}");
}
}

i m using this code to import user32

[DllImport("User32.Dll")]
public static extern void Send(String str);
nothing is happening

This code was posted by me...

modified on Saturday, July 11, 2009 11:43 PM

Re: import user32.dll in c#

PIEBALDconsult11-Jul-09 17:54

PIEBALDconsult

11-Jul-09 17:54

Not sure, but here's the pattern I use for such things:

[
    System.Runtime.InteropServices.DllImportAttribute
    (
        "User32"
    ,
        SetLastError=true
    ,
        EntryPoint="FindWindow"
    )
]
private static extern System.IntPtr
API_FindWindow
(
    string lpClassName
,
    string lpWindowName
) ;

public static System.IntPtr
FindWindow
(
    string WindowName
)
{
    return ( API_FindWindow
    (
        null
    ,
        WindowName
    ) ) ;
}

Re: import user32.dll in c#

Vivek Vijayan11-Jul-09 18:09

Vivek Vijayan

11-Jul-09 18:09

i din get
i m not able to use this
how do i invoke start menu

is this way correct???
urgent plzzzz

[DllImport("User32.Dll")]
public static void send(string str);

private void button1_Click(object sender, EventArgs e)
{
Form1.send("^{ESC}");
}

how can i use sendkeys.send in this way

This code was posted by me...

Re: import user32.dll in c#

PIEBALDconsult11-Jul-09 18:21

PIEBALDconsult

11-Jul-09 18:21

Are you looking for System.Windows.Forms.SendKeys.Send ? You don't need to import to do that.

Re: import user32.dll in c#

dan!sh 11-Jul-09 22:21

dan!sh

11-Jul-09 22:21

1. Put a breakpoint at the line: if(condition).
2. Run your code.
3. When the breakpoint is hit, press F10. If the control goes to line:SendKeys.Send("^{ESC}");
Then the start menu will be displayed.
4. If control does not goes to that line, then condition is false and hence the start menu will not be displayed.

There is no need to import User32 for this. SendKeys is a class in System.Windows.Forms namespace.

Re: import user32.dll in c#

Vivek Vijayan11-Jul-09 23:09

Vivek Vijayan

11-Jul-09 23:09

<br />
private void button1_Click(object sender, EventArgs e)<br />
        {<br />
            textBox1.Focus();<br />
            SendKeys.Send("E");<br />
            SendKeys.Send("^(ESC)");<br />
            <br />
        }<br />

i put a breakpoint at SendKeys.Send("^(ESC)") but then the system hangs and i have to take taskmanager to stop the execution Frown | :(

but the SendKeys.Send("E") is working...(displays E on textbox)

This code was posted by me...

Re: import user32.dll in c#

dan!sh 11-Jul-09 23:41

dan!sh

11-Jul-09 23:41

Replace (ESC) by {ESC}.

Re: import user32.dll in c# [modified]

Lino Chacko12-Jul-09 6:12

Lino Chacko

12-Jul-09 6:12

using System.Runtime.InteropServices;

[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags,
UIntPtr dwExtraInfo);

 private void btnInvokeStartButton_Click(object sender, EventArgs e)
 {
     const int VK_CONTROL = 17;
     const int VK_ESCAPE  = 27;
     const int VK_LWIN = 91;
     const int VK_RWIN = 92;

     const uint KEYEVENTF_KEYDOWN = 0;
     const uint KEYEVENTF_KEYUP = 2;

//if you just want to invoke Start button use this code

     //    Press the Windows Key
     keybd_event(VK_LWIN, 0, KEYEVENTF_KEYDOWN, (UIntPtr)0);
     // Release the Windows key
     keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, (UIntPtr)0);

//if you want to use Ctrl and Esc keys to invoke Start button use

     ////   Press the Ctrl-Esc key
     //keybd_event(VK_CONTROL, 0, KEYEVENTF_KEYDOWN, (UIntPtr)0);
     //keybd_event(VK_ESCAPE, 0, KEYEVENTF_KEYDOWN, (UIntPtr)0);
     //// Release the Ctrl-Esc key
     //keybd_event(VK_CONTROL, 0, KEYEVENTF_KEYUP, (UIntPtr)0);
     //keybd_event(VK_ESCAPE, 0, KEYEVENTF_KEYUP, (UIntPtr)0);

 }

modified on Monday, July 13, 2009 8:38 AM

Re: import user32.dll in c#

dan!sh 12-Jul-09 7:13

dan!sh

12-Jul-09 7:13

I am afraid but I had to vote you since SendKeys.Send("^{ESC") works fine for me and I don't feel any need of using APIs here. Might be missing out on something.

Re: import user32.dll in c#

Mirko198013-Jul-09 0:20

Mirko1980

13-Jul-09 0:20

I just noticed in his another thread that the method he's using is called page_Load.
I'm afraid he's trying to use SendKeys in a Web Application and for that reason he can't make it work.

Re: import user32.dll in c#

Enver Maroshi13-Jul-09 1:30

Enver Maroshi

13-Jul-09 1:30

Well, for me it's not working, and i'm the one who suggested him to use API. It does not work in C# and it does not work in VB.Net either.

SendKeys.Send("^{ESC}")

Does nothing.

Windows XP.

Re: import user32.dll in c#

Mirko198013-Jul-09 2:48

Mirko1980

13-Jul-09 2:48

That's strange, could be an OS-related issue?
For me it's working using Win7 RC and .NET 3.5.

How to increase the scope in an if statement [modified]

Nathan Revka11-Jul-09 12:50

Nathan Revka

11-Jul-09 12:50

I need to increase the scope of double fee and total. The following code doesn't work because fee and total are out of the scope on the writeline.

if (time &lt;= 3)
{
fee = 2;
total = total + fee;
}

I have more if statements involving fee and total but they all will be applied to the following writeline

Console.WriteLine("Current charge: {0:c}, Total receipts: {1:c}", fee, total);

Edit:
I made fee and total a static variable above the main method and now it works even though I set the new value of fee and total inside a block with less scope. I am not sure how this works, but it works, maybe someone can tell me why it works.

modified on Saturday, July 11, 2009 7:11 PM

Re: How to increase the scope in an if statement

harold aptroot11-Jul-09 13:03

harold aptroot

11-Jul-09 13:03

Nathan Revka wrote:
fee and total are out of the scope on the writeline.

They aren't, at least not in the code that you showed.

Re: How to increase the scope in an if statement

Luc Pattyn11-Jul-09 13:59

Luc Pattyn

11-Jul-09 13:59

Hi,

I'm not sure what you are doing, but it could be very wrong.

public void someMethod1() {
    if (time <= 3) {
        int fee = 2;
    }
    Console.WriteLine("Fee: {0:c}", fee);
}

does not compile since fee does not exist outside the if block.

public void someMethod1() {
    int fee = 0;
    if (time <= 3) {
        int fee = 2;
    }
    Console.WriteLine("Fee: {0:c}", fee);
}

does compile since fee exists outside the if block AND is guaranteed to hold a value.

int fee;  // or static int fee;
public void someMethod1() {
    fee=0;
    if (time <= 3) {
        fee = 2;
    }
    Console.WriteLine("Fee: {0:c}", fee);
}
public void someMethod2() {
    fee=0;
    if (time <= 2223) {
        fee = 2222;
    }
    Console.WriteLine("Fee: {0:c}", fee);
}

is probably not OK since both methods share a variable they did not intend to share. Both methods could run at the same time (using threads) and confusing each other.

If the data link between those methods is not intended, the methods really should use local variables.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Re: How to increase the scope in an if statement

DaveyM6911-Jul-09 14:21

DaveyM69

11-Jul-09 14:21

Nathan Revka wrote:
I made fee and total a static variable above the main method

Unless you have a particular need for a field to be accessible globaly and not tied to an instance, I would not have it as static.

You mention your Main method, is this a console app? If so, create a seperate class and put stuff in that, and instanciate that class within the main method.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Help me to convert this code in Java into a C# code

Member 333548911-Jul-09 9:46

Member 3335489

11-Jul-09 9:46

Help me to convert this code in Java into a C# code

import java.io.*;
import java.net.*;


public class simpleServer
{
	public static void main(String args[])
	{
		// Message terminator
		char EOF = (char)0x00;

		try
		{
			// create a serverSocket connection on port 9999
			ServerSocket s = new ServerSocket(2055);

			System.out.println("Server started. Waiting for connections...");
			// wait for incoming connections
			Socket incoming = s.accept();

			BufferedReader data_in = new BufferedReader(
					new InputStreamReader(incoming.getInputStream()));
			PrintWriter data_out = new PrintWriter(incoming.getOutputStream());

			data_out.println("Welcome! type EXIT to quit." + EOF);
			data_out.flush();

			boolean quit = false;

			// Waits for the EXIT command
			while (!quit)
			{
				String msg = data_in.readLine();

				if (msg == null) quit = true;

				if (!msg.trim().equals("EXIT"))
				{
					data_out.println("You sayed: <b>" + msg.trim() + "</b>" + EOF);
					data_out.flush();
				}
				else
				{
					quit = true;
				}
			}
		}
		catch (Exception e)
		{
			System.out.println("Connection lost");
		}
	}
}

Re: Help me to convert this code in Java into a C# code

OriginalGriff11-Jul-09 10:36

OriginalGriff

11-Jul-09 10:36

You forgot to say "pretty please?".

I'm going to sulk, now. Frown | :(

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

Re: Help me to convert this code in Java into a C# code

Member 333548911-Jul-09 10:56

Member 3335489

11-Jul-09 10:56

help me please Smile | :)

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