C# Discussion Boards - CodeProject

Re: How to place user controls dynamically on a windows form

12-May-09 1:15

This is quite trivial, you should buy a book and read it. The Petzold book is good in this regard.

You add the control to the form's controls collection and you set it's position.

Christian Graus

Driven to the arms of OSX by Vista.

"I am new to programming world. I have been learning c# for about past four weeks. I am quite acquainted with the fundamentals of c#. Now I have to work on a project which converts given flat files to XML using the XML serialization method" - SK64 ( but the forums have stuff like this posted every day )

DaveyM6912-May-09 1:25

DaveyM69

12-May-09 1:25

If using 2.0 or above you can use a generic function such as this in your form.

private void AddControl<T>(string text, Point location, Size size) where T : Control, new()
{
    T control = new T();
    control.Text = text;
    control.Location = location;
    control.Size = size;
    this.Controls.Add(control);
}

and call it like

AddControl<Button>("New Button", new Point(12, 12), new Size(75, 23));

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)

Re: How to place user controls dynamically on a windows form

Michael Bookatz12-May-09 1:34

Michael Bookatz

12-May-09 1:34

nice solution

Re: How to place user controls dynamically on a windows form

Henry Minute12-May-09 1:57

Henry Minute

12-May-09 1:57

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: How to place user controls dynamically on a windows form

Rob Philpott12-May-09 4:20

Rob Philpott

12-May-09 4:20

Well blinking 'eck. I never knew that Control had a text property. Just assumed it was lower down in the class hierarchy on certain controls. That's what I've learnt today. Smile | :)

Regards,
Rob Philpott.

Re: How to place user controls dynamically on a windows form [modified]

DaveyM6912-May-09 5:02

DaveyM69

12-May-09 5:02

Control has got way too many properties IMO. Deriving from it to create a new control is a PITA as you have to try and hide all the non relevant ones (and methods too) which is not only messy/time consuming but very non OOP.

If they had a IControl interface that just had the basics required, and a form's Controls property was a list of IControl it would be way better.

Something like

interface IControl : ISynchronizeInvoke, IWin32Window { bool Enabled { get; set; } Point Location { get; set; } Size Size { get; set; } bool Visible { get; set; } } public abstract ControlBase: IControl { // Implement derived stuff here ... // }
It'll never happen though

[Edit] Made a mess of Interface with ControlBase stuff in it [/Edit]

Actually, now I've thought about it a few minutes - just the ControlBase (would need a little more than I provided so we can have OnPaint etc to override) would be enough. Give me ten minutes and I'll probably change my mind again!

modified on Tuesday, May 12, 2009 11:20 AM

Re: How to place user controls dynamically on a windows form

tim_gunning12-May-09 1:26

tim_gunning

12-May-09 1:26

unless I'm missing the point entirely wouldnt it be something along these lines:

yourControl.Left = Convert.ToInt32(yourXPosTextBox.Text);
yourControl.Top = Convert.ToInt32(yourYPosTextBox.Text);

or at least thats how I position controls within a form, if you mean something else ginore me Smile | :)

How to make the property having listview type

lnmca12-May-09 1:04

lnmca

12-May-09 1:04

Hi All,

I have a made the user control in C#,now i have faced the problem that i want to make the property in user control that pick up the data from database and display it in the list.....

Ex. ID Name
1 A
2 B
3 C

How is it possible in windows application...
Please help its urgent...

Thanks,
Lalit Narayan

Christian Graus12-May-09 1:17

12-May-09 1:17

lnmca wrote:
lease help its urgent...

No, it's not at all. I asked everyone in the office, and they all agreed.

Is this homework, or paid work ? If the former, talk to your teacher so he knows how lost you are. If the latter, you're stealing from your clients. Getting data from a DB, and using it with databound controls is probably one of the most widely discussed things, in books and online. You don't go into enough detail to really know how to give an exact answer, but select * from myTable and myGrid.DataSource = myDataSet, is really all you should need to do.

[Message Deleted]

lnmca12-May-09 1:31

lnmca

12-May-09 1:31

[Message Deleted]

Christian Graus12-May-09 1:37

12-May-09 1:37

Actually, the answer is in there, you just need to be able to read, and to know something about programming. I can't write copy and paste code based on what you told us, nor would I do that for someone unwilling to learn.

Tom Deketelaere12-May-09 1:45

Tom Deketelaere

12-May-09 1:45

Christian Graus wrote:
No, it's not at all. I asked everyone in the office, and they all agreed.

[Message Deleted]

lnmca12-May-09 2:03

lnmca

12-May-09 2:03

[Message Deleted]

Christian Graus12-May-09 2:18

12-May-09 2:18

Not by you, apparently....

Seriously, is google broken where you live ? Can you not read ? What I told you, IS the answer.

Best way to get an image of a Form

fly90412-May-09 2:46

fly904

12-May-09 2:46

lnmca wrote:
Is it ~~not~~ possible to pick the data from database and show it in the property as in dropdownlist?

Yes.

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

Steve_12-May-09 0:56

Re: Best way to get an image of a Form

12-May-09 0:56

Hi,

I would like to be able to capture an image of an arbitrary window (though it is most likey that it will be a window I create). What is the best way to do this? I am currently using the Graphics.CopyFromScreen method to paint the section of the screen the window occupies to a bitmap but this has the obvious disadvantage that if the window is behind another, the image will also capture this overlap. Is there any other way of doing this that would solve this problem?

Thanks,

Steve

Christian Graus12-May-09 1:17

Re: Best way to get an image of a Form

12-May-09 1:17

I believe the control themselves have a rendertobitmap method that you can call, which I assume triggers a paint event but renders to a bitmap, not the screen.

Steve_12-May-09 1:46

Re: Best way to get an image of a Form

12-May-09 1:46

I had a look for one initially but didn't find anything. Having had another look I can see Control.DrawToBitmap, perhaps I should have looked harder the first time!

Thanks for your advice.

Steve

Christian Graus12-May-09 1:47

Executing Java Object in C#

12-May-09 1:47

*grin* glad to help

Mninawa12-May-09 0:54

Mninawa

12-May-09 0:54

I have this task, i need to call a Java Application using a web-service call.I need to know if someone has a clue on how to do that,so far this is my attempt.

string cmd ="C:\Program Files\Java\jre1.6.0\bin\Java.exe"; 
//We use this command to invoke or start the java application which take argument infront.

string cmdParams="java -Xms32m -Xmx1g -Djava.library.path=d:\cep\col\sql -classpath d:\cep\col\commons-net-1.4.1.jar;d:\cep\col\commons-codec-1.3.jar;d:\cep\col\sql\sqljdbc.jar;d:\cep\col\DialogInput.jar za.co.lightWave.control.DialogInputControl";


using (Process process = Process.Start(new ProcessStartInfo(cmd, cmdParams)))
            {
    
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError= true;

                process.StartInfo.UseShellExecute = false;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
    
                process.Start();

                process.WaitForExit(timeout);
                return process.ExitCode;
            }

I need to know what is an effective way of executing that command,what i have currently is

java.lang.NoClassDefFoundError: java Exception in thread "main"

Thank you in advance
Mninawa

Steve_12-May-09 0:59

12-May-09 0:59

Hi,

Have you tried running the command you are attempting to run in the command line first to make sure that the command actually works? What you are getting is an error from Java that says it cannot find a certain class. This is almost always a problem with the classpath argument of the command. Try debugging the command in cmd.exe first and then once you are sure the command works, try doing it in code.

Steve

Steve_12-May-09 1:03

12-May-09 1:03

PS.

I just had a closer look at your commands. You are setting the command to call the Java virtual machine (Java.exe) which is fine. But you are then setting the first argument (in your cmdParams) to "java" then "-xms32m...etc". Did you mean to put jar instead of java? When you execute a JAR file on the command line it should be something like "C:\whatever\Java.exe -jar MyJar.jar". Take a look at the documentation for the Java Virtual Machine when running JAR files.

Steve

Mninawa12-May-09 1:59

Mninawa

12-May-09 1:59

Hi Steve,thanx for your help.

On that not you are quite right,In the documentations for JVM,this is how you would execute .jar file,but now what i have is the combination of libraries,which makes up an application caller,which is that cmdParam,
well i have to find a way to execute them in C# and I thought using this way would solve the problem.

I thought one might have a solution besides the one in did,because i have to do them that way.
Mninawa