C# Discussion Boards - CodeProject

Multi-Column Listbox :: C#

19-Nov-02 20:45

Look into using SOAP. e.g

I have used this in the past for my ASP.NET applications, its very elegant.

P.S. you can run the scheduled event on the server using the System.Timers namespace instead of through a console app on a remote machine (of course it depends are your specific business requirements)

Re: Remoting Examples

SimonS19-Nov-02 21:27

SimonS

19-Nov-02 21:27

Check out Dotnet Remoting .
You can also download a sample chapter from his book too.

Cheers,
Simon

"From now on, if rogue states want to buy weapons of mass destruction, they're going to have to go on eBay," Mr. Bezos said.

valikac19-Nov-02 17:08

19-Nov-02 17:08

Hi.

I am a C++ and MFC programmer. I have been forced to code a simple C# program at school. Frankly, I feel threaten. Secondly, I find C# confused. Everything is "Win Form." Where the heck are all the code behind the program?

Anyways, I am desperately in need of help. Here is the basic program.

Buttons = 2
Edit boxes = 3
Listbox = 1

The idea is to enter information in one the three edit boxes and then click a button to add it to a list box.

Right now I want to add multicolumns to the listbox.

Please post if you have experience with C# and can point out all the shortcuts. This is a very simple introductory program.

Thanks,
Kuphryn

Joshua Nussbaum19-Nov-02 20:56

19-Nov-02 20:56

use the System.Windows.Forms.ListBox class

Handle the "Add" button's Click event. your code for adding would look something like

ListViewItem lvi = new ListViewItem();
lvi.Text = edit1.Text;
lvi.SubItems.Add(edit2.Text);
lvi.SubItems.Add(edit3.Text);

listView1.Items.Add(lvi);

Make sure listView1.View is set to View.Details

P.S. if you want to see how the Windows Forms work, use the MSIL disassembler (ildasm.exe).

valikac20-Nov-02 12:07

20-Nov-02 12:07

Okay. Thanks.

I have two more question.

How do you initialize the listbox columns with text such as "Column 1," "Column 2," etc?

How do you get and/or modify the text of an item in a specific column given that I know the index?

Kuphryn

Joshua Nussbaum20-Nov-02 12:46

20-Nov-02 12:46

Use the ListView.Columns.Add(..) method, see example below

using System;
using System.Windows.Forms;

public class ListViewForm : Form {
public static void Main() {
Application.Run(new ListViewForm());
}

// test data
public readonly string[] firstNames = {"John","James","Leroy","Jane","Elizabeth","Samantha"};
public readonly string[] lastNames = {"Johnson","Smith","Doe","Gainsworth","Hadley","Buckley"};

private ListView listView;

public ListViewForm() {
listView = new ListView();
listView.Dock = DockStyle.Fill;
listView.View = View.Details;
listView.Columns.Add("Last", -2, HorizontalAlignment.Left);
listView.Columns.Add("First", -2, HorizontalAlignment.Left);

// load the data
int f, l;
ListViewItem lvi;

// create a cross product of the names
for (f=0;f<firstNames.Length;f++) {
for (l=0;l<lastNames.Length;l++) {
lvi = new ListViewItem();
lvi.Text = lastNames[l];
lvi.SubItems.Add(firstNames[f]);

// add the item
listView.Items.Add(lvi);
}
}

this.Controls.Add(listView);
}
}

valikac20-Nov-02 15:10

20-Nov-02 15:10

Thanks.

The problem is I am using a listbox, not a listview. I created the list box using winform.

Kuphryn

David Stone20-Nov-02 17:48

David Stone

20-Nov-02 17:48

Why do you want to use a listbox? The listbox doesn't really do columns like say, My Computer does when you are in detail view. What happens when you use the Listbox's multi-column property is that when the text gets down to the bottom of the listbox's area, the listbox will start listing the next item on a second column. There is no way to label them with the listbox...instead, you should use the listview.

I don't know whether it's just the light but I swear the database server gives me dirty looks everytime I wander past.
-Chris Maunder

valikac20-Nov-02 17:51

20-Nov-02 17:51

Yes. I switched to a listview.

Now I need to figure out how to get the selected item (single item).

Kuphryn

LongRange.Shooter21-Nov-02 9:56

LongRange.Shooter

21-Nov-02 9:56

At the high level of the listview object you should find SelectedIndexes and SelectedItems. The SelectedItems is a collection of all items selected, even if it is only one.

_____________________________________________
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Not because of those that do evil,
but because of those who look on and do nothing.}

valikac21-Nov-02 9:59

21-Nov-02 9:59

Okay. Thanks.

Kuphryn

i have two threads and make a group of it?

ian mariano20-Nov-02 3:05

ian mariano

20-Nov-02 3:05

Think of WinForms as the dialogs you create in MFC. The "code behind" is similar to that of MFC, you inherit from a base class, and wire up your code. There are differences from MFC in how C# / .NET handles events.

You should review Event Handlers in Visual Basic and Visual C#[^] to understand how the mechanism works. In MFC, you handle messages through the message loop, in C#, you still write a handler, but it's triggered through the delegate / event mechanism. In a nutshell, you add your handler as a "listener" for an event (such as a button click or listbox selection change.)

It would also be wise to review the Windows Forms and Web Forms Recommendations[^].

The term "code behind" is more used with ASP.NET applications, where the "code behind" refers to the class that your aspx page inherits from. ASPX is basically ASP on steroids Poke tongue | ;-P

Refer to Creating ASP.NET Web Applications[^] for more information.

"The greatest danger to humanity is humanity without an open mind."
- Ian Mariano - http://www.ian-space.com/

imran_rafique19-Nov-02 16:31

imran_rafique

19-Nov-02 16:31

i have two threads and make a group of it.
how to do that?
i want to kill threads after some condition.
how to do that?

r00d0034@yahoo.com

Re: i have two threads and make a group of it?

Joshua Nussbaum19-Nov-02 20:57