C# Discussion Boards - CodeProject

Re: Setup and Installation Project

14-Jul-04 5:11

You set the EditNProperty to a property name, typically upper case (so it can be changed on the command-line as a protected property, though, IIRC, VS.NET doesn't use this (it's very limited in functionality when it comes to Windows Installer packages). You can set the initial value using EditNValue.

After compiling the MSI package, you can also use Orca from the Windows Installer SDK (go to http://msdn.microsoft.com/platformsdk[^] to download it, though Orca is a separate install within the downloaded files; in the bin directory, install Orca.msi) to add that same property name to the Property table with the initial value.

Microsoft MVP, Visual C#
My Articles

Praveen Nayak14-Jul-04 5:23

Praveen Nayak

14-Jul-04 5:23

I already have used the Edit1Property and have set it to "URL". What I need is to be able to fill the Edit1Value dynamically, read from a text file maybe, and be displayed to the user.

Think of it as evolution in action

Re: Setup and Installation Project

Heath Stewart14-Jul-04 5:42

You Can Also Post Your Openion.

14-Jul-04 5:42

You have to write a custom action for that, and writing a .NET Installer class derivative won't work. You must write a native custom action (see the Windows Installer SDK for details), and VS.NET does not support that.

It can be read from the command-line, though, if you use something like this:

msiexec.exe /i MyPackage.msi URL=http://www.codeproject.com

I suggest you read through the Windows Installer SDK.

The VS.NET Windows Installer project is very limited, as I mentioned before. Trust me - I've been working with Windows Installer since 1.0 beta many years ago and have been a consultant for numerous companies for Windows Installer-related development. VS.NET's Installer project is meant to be quick and simple and does not expose a UI for a majority of what's possible.

Microsoft MVP, Visual C#
My Articles

sreejith ss nair13-Jul-04 22:57

sreejith ss nair

13-Jul-04 22:57

hai there,

i need a small openion from your side. i have one project (ERP for Education Institution) in VB. the reprts and database are created by power builder and sybase.

Right now , i planned to upgrade it to dotnet. Before that let me say one thing. I have no intension to update or upgrade my reports and database. i am only to upgrade other phases of this project.

1. According to you, which dotnet language is most perfect match for this senario.

2. Upto how much extend i can make it updated using C#.net ?

3. is there any tutorial or urls that will help me to kick start this upgradation job ?

i am confort in C# than vb.net.

thanks
Blush | :O

********************
S r e e j i t h S S N a i r
Bangalore - India
********************

Re: You Can Also Post Your Openion.

Dave Kreskowiak14-Jul-04 8:28

Dave Kreskowiak

14-Jul-04 8:28

sreejith ss nair wrote:
. According to you, which dotnet language is most perfect match for this senario.

It doesn't matter which language you use. Whatever your compfortable with.

sreejith ss nair wrote:
Upto how much extend i can make it updated using C#.net ?

What???? This made no sense what-so-ever....

sreejith ss nair wrote:
is there any tutorial or urls that will help me to kick start this upgradation job ?

No. Your rewriting an application. It's up to you to figure out the requirements, design and build. You already have a tempate to work from if you have the PowerBuilder source.

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

A question about Image of PictureBox

Member 94012513-Jul-04 21:47

Member 940125

13-Jul-04 21:47

I use MDI form in my C# project,
each MDI child form has a PictureBox on it,
When I load my saved project,
I use
myPicture.PictureBox.Image = Image.FromFile(path);
to set the image show on PictureBox.

But in my project sometimes I need to insert a new Page,
so I write

				<br />
for(int i=Page_number-1; i>IntSelectPage; i--)<br />
{<br />
   ((MyInkPicture)myAL[i]).PictureBox.Image = ((MyInkPicture)myAL[i-1]).PictureBox.Image;<br />
} <br />

to show the correct image of each page,

Now there is a big problem,
When I want to save my changes,

<br />
PictureBox.Image.Save(savepath,System.Drawing.Imaging.ImageFormat.Bmp);<br />

for example,
because original PictureBox[2]'s image now is PictureBox[3]'s image,
if I want to save image by "Picture2.bmp",
it would tell me "Picture2.bmp" is in use...I can't overwrite it!!

Can anyone tell me how to load a picture form a set file path,
and if the image changes, I can overwrite it...??
Thanks a lot !!

Re: A question about Image of PictureBox

Heath Stewart14-Jul-04 5:32

Checkin dynamically added elements

14-Jul-04 5:32

Clone the original image then dispose it so that you have a copy of the image, not an image from a file (which uses an open file handle, leaving the file in use):

using (Image img = Image.FromFile(path))
  myPicture.PictureBox.Image = (Image)img.Clone();

The using statement here makes sure that the object is disposed when the block is complete, even in cases when an exception is thrown.

Also - just a suggestion - I'd recommend you encapsulate myPicture.PictureBox.Image, exposing the Image property on your class by defining it like so:

public System.Drawing.Image Image
{
  get { return PictureBox.Image; }
  set { PictureBox.Image = value; }
}

This ensures that callers can directly modify your PictureBox control. This makes for a better object-oriented design.

Microsoft MVP, Visual C#
My Articles

saud_a_k13-Jul-04 20:53

saud_a_k

13-Jul-04 20:53

I add two TextBoxes snd a checkbox to a panel, each time I click on the add button. Each have a unique name. I can add them fine, I need to remove them according to the checkbox's checked property. I first need to know whether a checkbox is selected, then I need to traverse all the checkboxes and if they are seleted, I need to remove the corresponding texboxes.
I use:
if(this.pnl1.Controls.Contains(CheckBox))
{
// how to check each checkbox
}
Help!

_____________________________________________________
Yea! I could be wrong...

Jay Shankar13-Jul-04 22:24

Jay Shankar

13-Jul-04 22:24

I just tried to solve the problem logically. May be you get some better solution.

for(int i =0; i < this.Controls.Count; i++)
{
	if(this.Controls[i].GetType().ToString() == "System.Windows.Forms.CheckBox")
	{
		MessageBox.Show(Controls[i].Name);
	}
}

Do revert back whether it solves your purpose or not.

Regards,

Jay.

saud_a_k13-Jul-04 23:05

saud_a_k

13-Jul-04 23:05

Thanx bro..
I'll try this later, if you don't mind.
But it looks like it might work. thnx 'gain.

_____________________________________________________
Yea! I could be wrong...

mav.northwind13-Jul-04 23:51

13-Jul-04 23:51

Or even shorter, without string comparison and getting the cast from Control to CheckBox for free:

foreach (Control c in this.pnl1.Controls)
{
  CheckBox cb = c as CheckBox;
  if (cb != null)
  {
    MessageBox.Show("Checkbox "+cb.Name+" checked: "+cb.Checked);
  }
}

mav

Jay Shankar14-Jul-04 14:33

Jay Shankar

14-Jul-04 14:33

But here CheckBox cb variable is created for each round of execution of the loop. I do not know whether this can be said as more optimized.

Regards,

Jay

mav.northwind14-Jul-04 20:05

Determining RightToLeft Property

14-Jul-04 20:05

Ok, you can take the CheckBox cb and put it outside the loop if that's your only concern... Wink | ;)

Or you yould use

if (c is CheckBox)
{
  CheckBox cb = c as CheckBox;
}

I found the is keyword very handy instead of fiddling with GetType().ToString() and then comparing to the quite verbose (and thus prone to typos) fully qualified type names.

mav

13-Jul-04 20:50

I am writing an application to change the inputlanguage and culture using C#. I am trying to find out whether selected language is written left-to-right or right-to-left to set right-to-left property of my control accordingly. Is there any way to find this ? Please Help!!

Naqvi

What's the difference ?

PShweta13-Jul-04 19:45

PShweta

13-Jul-04 19:45

Can anyone tell me is there any difference between the usual DOS Command Prompt and the Visual Studio.NET Command Prompt provided with the Visual studio.NET? Confused | :confused:

Can I run a C# Console application which takes Command line arugent from the Visul Studio itself without using the Command Prompt? D'Oh! | :doh:

Thanx..... Blush | :O

Re: What's the difference ?

Roman Rodov13-Jul-04 20:00

Roman Rodov

13-Jul-04 20:00

The Visual Studio .NET Command Prompt just sets up the paths to all the VS and .NET tools.
Go to normal command prompt and try an run "csc" or "guidgen" if they're not in your path, they won't run. Inthe VS.NET command prompt they will. And yes you can run console apps from IDE and even pass parameters to it. Check Project->Properties

Re: What's the difference ?

PShweta14-Jul-04 0:17

PShweta

14-Jul-04 0:17

Thanx Roman
I tried giving command line arguments in Project->Proprties->Configuration Properties->Debugging. It works fine.
If every time I want to give a different value I have to set the value there only.

thnx again.

Replicate CancelEventArgs behaviour?

misterbear13-Jul-04 19:34

misterbear

13-Jul-04 19:34

How can one replicate the Close() event with its corresponding CancelEventArgs?
I.e. how to find out from the code firing the event what the receiver set this attribute to?
Does anyone know and can help clarify this procedure to me...

Re: Replicate CancelEventArgs behaviour?

mav.northwind14-Jul-04 0:04

Re: Replicate CancelEventArgs behaviour?

14-Jul-04 0:04

If there's just a single event handler attached, then it's fairly easy:

In your class you need:

public delegate MyCancelHandler(bool cancel);
 
public event MyCancelHandler AnEventThatCanBeCancelled;
 
// Later on when you want the event to fire
if (AnEventThatCanBeCancelled != null)
{
  bool cancel = false;
  AnEventThatCanBeCancelled(cancel);
  
  if (cancel)
  {
    MessageBox.Show("Event has been cancelled by a listener");
  }
  else
  {
    MessageBox.Show("Event has NOT been cancelled, go on with whatever you want");
  }
}

If there's more than one listener attached, then you'll only get the cancel info of the last listener notified.
In this case you'll have to go through all registered delegates (using MulticastDelegate.GetInvocationList()) and check all of them if anyone wants to cancel your event.

Regards,
mav

Heath Stewart14-Jul-04 4:52

Re: Replicate CancelEventArgs behaviour?

14-Jul-04 4:52

That won't work. bool (System.Boolean) is a value type, and you'd need to declare the delegate parameter as out or ref.

Besides, it's far easier to just reuse CancelEventHandler. Since it uses the CancelEventArgs which has a Cancel property (that will keep the value), you don't need to declare your own event.

Also, while it's not required, events should typically follow the EventHandler signature and the second parameter should (agian, not required to) derive from EventArgs. CancelEventArgs does, of course, extend this class.

If you want to know what a specific callee of the callback set the CancelEventArgs.Cancel property to, your past paragraph is correct.

Microsoft MVP, Visual C#
My Articles

mav.northwind14-Jul-04 5:36