Re: Time Validation - C# Discussion Boards

How can I get the size of the string in pixel ??

4-Jul-04 17:41

sreejith ss nair wrote:
any idea

Yep, you need to override the OnClosing event and capture the DialogResult from your user. Based upon the users response, change the Cancel property of the CancelEventArgs and pass it to OnClosing of the base class. Here is a quick example:

protected override void OnClosing(CancelEventArgs e)
{
    DialogResult r;
    r = MessageBox.Show("Do you want to quit?", "Quiting",
        MessageBoxButtons.YesNo, MessageBoxIcon.Information);
    if(r == DialogResult.No)
        e.Cancel = true;
    base.OnClosing (e);
}

- Nick Parker
My Blog | My Articles

Re: control box

sreejith ss nair4-Jul-04 18:25

sreejith ss nair

4-Jul-04 18:25

nice shoot dear Blush | :O

Please feel free to contact.

Sreejith S S Nair - Bangalore

MarkSender4-Jul-04 16:56

MarkSender

4-Jul-04 16:56

I want to draw many strings in graphics, but I don't know how to get the size of the string in pixel (not the Length) to control them..
( As the function CSIZE GetTextExtent(CString) in Visual C++ )
Can you help me?

Cuoc doi ai biet dau ngay mai... Smile | :)

Re: How can I get the size of the string in pixel ??

Nick Parker4-Jul-04 17:24

4-Jul-04 17:24

Minh Tong Tong wrote:
Can you help me?

Sure, if you read the MeasureString[^] method of the Graphics class, it returns a SizeF structure which gives you both the Height and Width of the string measured in pixels.

- Nick Parker
My Blog | My Articles

clearing console screen

insurgentpyro4-Jul-04 16:42

4-Jul-04 16:42

does anyone have any straightforward method of clearing the console screen with an explanation?

i know it can be done...

Nick Parker4-Jul-04 17:28

4-Jul-04 17:28

insurgentpyro wrote:
i know it can be done...

Yes, it can. Why don't you read the article Microsoft has published in it's knowledgebase:

HOW TO: Clear the Console Window with Visual C# .NET[^]

If you have questions that aren't clear to you within their article, feel free to post them here.

- Nick Parker
My Blog | My Articles

insurgentpyro4-Jul-04 17:44

4-Jul-04 17:44

thank you. i read it and implemented it. however, everytime i try to compile, it gives me an error

"needs an object reference for the nonstatic method 'nsClearConsole.ClearConsole.Clear()'"

so i created an object:

nsClearConsole.ClearConsole cls = new nsClearConsole.ClearConsole();

then i used it:

cls.Clear();

but when i compile, it says something about cls not being a namespace or class (did you miss a using or assembly reference?) or something like that...

any help?

Nick Parker4-Jul-04 18:05

4-Jul-04 18:05

Are you trying to write this as a singleton class? The following works for me:

using System;
using System.Runtime.InteropServices;

namespace Example
{
	class ConsoleClass
	{
		private const int STD_OUTPUT_HANDLE  = -11;
		private const byte EMPTY = 32;
		private int hConsoleHandle;

		public ConsoleClass()
		{
			hConsoleHandle = GetStdHandle(STD_OUTPUT_HANDLE);
		}

		[StructLayout(LayoutKind.Sequential)]
			struct COORD
		{
			public short x;
			public short y;
		}

		[StructLayout(LayoutKind.Sequential)]
			struct SMALL_RECT
		{
			public short Left;
			public short Top;
			public short Right;
			public short Bottom;
		}
		
		[StructLayout(LayoutKind.Sequential)]
			struct	CONSOLE_SCREEN_BUFFER_INFO
		{
			public COORD dwSize;
			public COORD dwCursorPosition;
			public int wAttributes;
			public SMALL_RECT srWindow;
			public COORD dwMaximumWindowSize;
		}

		[DllImport("kernel32.dll", EntryPoint="GetStdHandle", SetLastError=true, 
		 CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
		private static extern int GetStdHandle(int nStdHandle);

		[DllImport("kernel32.dll", EntryPoint="FillConsoleOutputCharacter", SetLastError=true, 
			 CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
		private static extern int FillConsoleOutputCharacter(int hConsoleOutput, 
									byte cCharacter, int nLength, COORD dwWriteCoord, 
									ref int lpNumberOfCharsWritten);

		[DllImport("kernel32.dll", EntryPoint="GetConsoleScreenBufferInfo", SetLastError=true, 
			 CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
		private static extern int GetConsoleScreenBufferInfo(int hConsoleOutput, 
									ref CONSOLE_SCREEN_BUFFER_INFO lpConsoleScreenBufferInfo);

		[DllImport("kernel32.dll", EntryPoint="SetConsoleCursorPosition", SetLastError=true, 
							CharSet=CharSet.Auto, CallingConvention=CallingConvention.StdCall)]
		private static extern int SetConsoleCursorPosition(int hConsoleOutput, COORD dwCursorPosition);

		public void Clear()
		{
			int hWrittenChars = 0;
			CONSOLE_SCREEN_BUFFER_INFO strConsoleInfo = new CONSOLE_SCREEN_BUFFER_INFO();			
			COORD Home;		
			Home.x = Home.y = 0;
			GetConsoleScreenBufferInfo(hConsoleHandle, ref strConsoleInfo);
			FillConsoleOutputCharacter(hConsoleHandle, EMPTY,
					strConsoleInfo.dwSize.x * strConsoleInfo.dwSize.y, Home, ref hWrittenChars);
			SetConsoleCursorPosition(hConsoleHandle, Home);
		}
	}

	class Demo
	{
		[STAThread]
		static void Main(string[] args)
		{
			ConsoleClass ClearMyConsole = new ConsoleClass();
			Console.WriteLine("THIS IS FIRST LINE");
			Console.ReadLine();
			ClearMyConsole.Clear();
			Console.WriteLine("THE CONSOLE WAS CLEARED");
			Console.WriteLine("Hit Enter to Terminate");
			Console.ReadLine();
		}
	}
}

- Nick Parker
My Blog | My Articles

insurgentpyro4-Jul-04 18:18

4-Jul-04 18:18

im using it as a .dll to another file.

using nsClearConsole;

and then i called it with a nsClearConsole.ClearConsole object called "cls".

cls.Clear();

am i doing something wrong?

Nick Parker4-Jul-04 18:25

4-Jul-04 18:25

You can compile it separately, that's not a problem. nsClearConsole should be the namespace (for your example), and as long as you have included a reference to that assembly and included the using nsClearConsole; within your code you should be fine. You don't need to prefix the ClearConsole class with nsClearConsole unless you are using another namespace somewhere that contains a ClearConsole class (unlikely).

- Nick Parker
My Blog | My Articles

insurgentpyro4-Jul-04 18:35