Re: How to create a "Double Click event" - C# Discussion Boards

12-Jan-05 3:41

I'm glad that I could help a bit Smile | :)

Unfortunately I can't answer your last question cause as I said I've never used double buffering myself and therefor haven't that much experience and knowledge. Sorry.

Events with .Net remoting

Member 164882911-Jan-05 23:46

Member 1648829

11-Jan-05 23:46

I have a solution that I have created using .Net remoting and am having a lot of trouble upgrading it to use events.

The solution uses a remote singleton object which I'm hosting with my own server. A requirement of the solution is that the remote object's assembly must remain seperate from the client so I am using an interface.

I have created a seperate assembly so that it can be referenced by both the client and the remote object's assemblies. This new assembly contains a single class that implements the Activator.GetObject method and subscribes to the remote event. After a little playing around with the formatter sink classes I can instantiate this class from the client application and it seems to successfully subscibe to the remote event (or at least it no longer throws exceptions). However the client side event handler is never called. I have implimented tracing on the server side to ensure that the event is being raised and event handlers are working there.

Does anyone know where I'm going wrong?

Calling C# DLL through Borland C++

kinju11-Jan-05 23:16

kinju

11-Jan-05 23:16

Hellow Friends,

My Problem is i have created a dll using C# and i have made every necessary thing to make it interoperatable and i have called it using VC++ 6.0.:-> sucessfully....
But now i need to call the same using Borland C++.. Confused | :confused:

Can anyone help me doing this...
i have searched a lot but i dint find any document related this ISSUE...

Thanx...

UpdateLayeredWindow problem ...

Axonn Echysttas11-Jan-05 21:57

Axonn Echysttas

11-Jan-05 21:57

Hi everybody... I got a short question about one nasty little API function which I am in most dire need of. I need to somehow update the translucency / transparency setting of a normal window. Say I got two buttons and a Scrollbar. I need to somehow call the UpdateLayeredWindow function each time the scrollbar is modified so I can modify the translucency (opacity) level of my window. So far, I need to DESTROY and create the window AGAIN and use "SetLayeredWindowAttributes" to achieve this. But it's not a solution, this is a workaround and it's not nice at all : ), I think you agree : ).

Here's what I got so far... (this is VB6 code, but any language will do, I can adapt to anything, the only thing that I need is to actually make this WORK : ) ).

<br />
UpdateLayeredWindow Me.hwnd, Me.hdc, ByVal 0, m_windowSize, m_mainSurfaceDC, <br />
m_srcPoint, 0, m_blendFunc, ULW_ALPHA

You don't have to care about the parameters. My question is not related to those. My question is... can this nasty function be used to set a NORMAL WINDOW? I mean not a bitmap! A window... with some buttons and stuff on it. I am sure it must be possible, but I just don't know how. It's one nasty little function and I can't find anywhere some good documentation about it, only examples that are not working properly or do more than I need this function to do. I Googled for it and 60% of the results were declaring it, but not using it ! HA! Imagine that! : (. The other 40% were either using bitmaps, either not working.

I got one example that uses bitmaps, but that's too complicated and it's not what I need. I tried to put a scrollbar on that window and it wouldn't even appear, of course, since the guy who did this is using some bunch of functions to work with the bitmaps : (.

Thank you a LOT for reading this and I would really appreciate any help, it's for a good cause : ) (freeware application). I sure hope there are some people on the Code Project who ran into this function before.

Just before you ask.... no, I can't use .Net to do this, but some .Net ideas WOULD be usefull since I could at least port it to my VB 6.

Have a nice day everybody : )

The Greater Mind Balance

Re: UpdateLayeredWindow problem ...

Dave Kreskowiak12-Jan-05 4:52

Dave Kreskowiak

12-Jan-05 4:52

1) Cross posting in multiple forums on the same site is considered very rude!

2) Posting VB code and asking VB questions in a C# or C++ Forum could get you strung up by your nads! Be prepared to receive much abuse.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Pocket PC Application

vksrisridhar11-Jan-05 21:20

vksrisridhar

11-Jan-05 21:20

hi all,

please tell me how can i capture TAB Key and is there is any property for automatic scroll in a tab control in .NET Compact framework.

Sri

How to create a "Double Click event"

lee meng11-Jan-05 20:47

lee meng

11-Jan-05 20:47

I am a student working on a stanalone project.

I have problem making a double click event on button. Is it that c# cannot do it? Have to use multi language like include a VBscript? If yes how to use multi language? Can i see a executable source code cause i m quite a slow learner.

Example: how to make a window based application that if u double left click your button. The label will be labeled "Hi", and if u single left click the button it will display "Hello".

It is a simple example i give to lower complicate my question. I have already spend quite some time developing my other functions in c# and got stuck to this problem therefore i wish not to change my programming language but import some other language to my c# project if necessary.

Please help fast... deadline coming near...

Stefan Troschuetz11-Jan-05 21:20

11-Jan-05 21:20

You don't have to use any other language here.
You'll have to handle the Click event of your button and determine inside the event handler whether two consecutive clicks are close enough to be considered a double click. To achieve this, start a simple timer in the event handler and check whether its interval has elapsed. If not, the user double-clicked your button.

J4amieC11-Jan-05 22:30

J4amieC

11-Jan-05 22:30

Stefan Troschütz wrote:
To achieve this, start a simple timer in the event handler and check whether its interval has elapsed

This is an old VB trick, and is more or less obsolete with .NET

An easier way is to handle the MouseDown event on your button, which raises an event with MouseEventArgs which in turn has a Clicks property. Here is some simple code to demonstrate:

private void button2_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
	Console.WriteLine(e.Clicks);
}

If you associate this with a button (in my case it was named button2), run the project in debug mode, and click the button while watching your Output window you should see a list of 1's & 2's coming up based on the number of clicks recieved on the button. So your code should read along the lines of

if(e.Clicks == 1)
  // Change button text to "Hi"
else
  // Change button text to "Hello"

HTH

Stefan Troschuetz11-Jan-05 22:43

11-Jan-05 22:43

Thanks for the info!
Again programming gets a bit easier Wink | ;)

lee meng12-Jan-05 4:06

lee meng

12-Jan-05 4:06

Sorry, me very beginner...
How to do that?

Stefan Troschuetz12-Jan-05 4:15

12-Jan-05 4:15

Use the solution J4amieC suggested. It's much easier.

Problem with parameters (Registry)

Re: Thank You

lee meng12-Jan-05 5:46

lee meng

12-Jan-05 5:46

Thanks guys for the advices. It have help me a lot. Big Grin | :-D

FireDK11-Jan-05 20:43

FireDK

11-Jan-05 20:43

Following is a sample of a C# class I created for one of my software projects.
I use it to register my application in the shortcut menu (right-click menu) of
all the files and folders of the HDD. I chose a simple registry approach to
this problem beacause I find it much easier than buiding and registering a COM
object (and I must say I'n not really into COM programming right now, so it
will be kinda hard for me to learn now, having to finish my project a.s.a.p.).

Basicly, the Associate function takes three parameters, the name of the
extension, the desired text to display and the path to the .exe file. (EG. If I
need to register DoIt that is located at C:\DoIt.exe and display the text DoIt
in the menu i use Associate("DoIt", "&DoIt", "C:\DoIt.exe") ). It works by
going to HKEY_CLASSES_ROOT in the registry and opening/creating the
AllFileSystemObjects subkey, whitch handles all the files and folders. It then
creates three new subkeys in this order shell \ extensionName \ command and
registers the .exe so that it is displayed in the right-click menu.

Everything works well, but I still have a problem. I need the path of the file
or folder on whitch I right-click to be sent as a parameter to my main
application (same as using command-line parameters) and I do this by adding %1
after my application's path in the registry (line 26 of the class). However,
this works only if I have a single file or folder selected and I was wondering
if it is possible to use this method to send multiple paths as parameters to my
application (by selecting multiple files or folders or both).

I would really appreciate your help beacause I'm... well, stuck. Smile | :)

10x a lot.

P.S. Please don't hate me for the long description or for the almost childish
manner that I used to express it, but I wanted my problem thoroughly
understood. No offence meant.

using System;
using Microsoft.Win32;

namespace ShellExtension
{
	public class ShellExtension
	{
		public ShellExtension() { }
		
		public void Associate(string extensionName, string extensionText, string filePath)
		{
			RegistryKey ClassesRoot = Registry.ClassesRoot;
			RegistryKey AllFileSystemObjects = ClassesRoot.OpenSubKey("AllFileSystemObjects", true);
			if (AllFileSystemObjects != null)
			{
				RegistryKey shell = AllFileSystemObjects.OpenSubKey("shell", true);
				if (shell != null)
				{
					shell.SetValue("", extensionName);
					shell.CreateSubKey(extensionName);
					
					RegistryKey shell_1 = shell.OpenSubKey(extensionName, true);
					shell_1.SetValue("", extensionText);
					shell_1.CreateSubKey("command");
					
					RegistryKey shell_2 = shell_1.OpenSubKey("command", true);
					shell_2.SetValue("", "\"" + filePath + "\" \"%1\"");
					
					return;
				}
				else
				{
					AllFileSystemObjects.CreateSubKey("shell");
					this.Associate(extensionName, extensionText, filePath);
					return;
				}
			}
			else
			{
				ClassesRoot.CreateSubKey("AllFileSystemObjects");
				this.Associate(extensionName, extensionText, filePath);
				return;
			}
		}
		
		public void unAssociate(string extensionName)
		{
			RegistryKey ClassesRoot = Registry.ClassesRoot;
			RegistryKey AllFileSystemObjects = ClassesRoot.OpenSubKey("AllFileSystemObjects", true);
			RegistryKey shell = AllFileSystemObjects.OpenSubKey("shell", true);
			
			if (shell.OpenSubKey(extensionName) != null)
			{
				shell.DeleteSubKeyTree(extensionName);
			}
			
			return;
		}
	}
}

Born from the dark, in the black cloak of night.

Datetime regional format

sevan11-Jan-05 19:09

sevan

11-Jan-05 19:09

when i write the date in win.txt

it was like this
Lsbox_Date.Items.Add(DTP_Today.Value.ToShortDateString());
so if the regional setting was set to MM/dd/yyyy it will write the date the same as regional setting

so i change it to this which always gonna be dd/mm/yyyy
Lsbox_Date.Items.Add(DTP_Today.Value.Day.ToString()+
"/"+DTP_Today.Value.Month.ToString()+"/"+DTP_Today.Value.Year.ToString());

when i read the win.txt

this code is reading the date from win.txt

StreamReader Read_key = File.OpenText(@windir+"\\Win.txt");
string key_Trim;
string key;
key_Trim = Read_key.ReadLine();
key = key_Trim.TrimEnd();
Read_key.Close();

Convert the key to datetime
DTP_Key.Value = Convert.ToDateTime(key.ToString());

so if the regional setting is set to dd/mm/yyyy i have no Problem coz the format is the same

but if the regional setting is set to mm/dd/yyyy then i get an error converting the key string.

i need help pls ASAP

Re: Datetime regional format

Stefan Troschuetz11-Jan-05 21:05

11-Jan-05 21:05

Use a explicit CultureInfo for writing and reading the date to be independent from setting of the PC:

System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en-US"); // use culture of your choice here

DTP_Today.Value.ToString("d", culture); // get short date string in culture-specific formatting

Convert.ToDateTime(key.ToString(), culture); // create from short date string in culture-specific formatting