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MSN Messenger: http://msdn.microsoft.com/downloads/default.asp?url=/downloads/topic.asp?url=/msdn-files/028/001/359/topic.xml
Internet Explorer: (really useful and fun) http://msdn.microsoft.com/library/default.asp?url=/workshop/browser/ext/tutorials/explorer.asp
Outlook addin's: This documentation is plentiful you should have no problem finding docs with simple searches on msdn or google.
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Hi there,
Can somebody give some example applications for the following:
I have an IIS ASP.NET application running. I need to have a small console application triggered by scheduled task invoke some object (class object) in the ASP.NET application.
Thanks in advance...
deepak
Deepak Kumar Vasudevan
http://deepak.portland.co.uk/
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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)
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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.
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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
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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).
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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
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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);
}
}
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Thanks.
The problem is I am using a listbox, not a listview. I created the list box using winform.
Kuphryn
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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
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Yes. I switched to a listview.
Now I need to figure out how to get the selected item (single item).
Kuphryn
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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.
_____________________________________________
The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.
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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  Refer to Creating ASP.NET Web Applications[^] for more information.
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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
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I learned that class consists of members(data member or member function);
but in other articles I see new terms such as property and method.
Does method can be compared to member function?
And why use properties(get,set)?
Thanks.
this is my signature for forums quoted from shog*9:
I can't help but feel, somewhere deep within that withered, bitter, scheming person, there is a small child, frightened, looking a way out.
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zhoujun wrote:
And why use properties(get,set)?
Because you generally in C++ make variables private and provide get/set methods so you can control access. With C#, you can do that, but use a syntax that is more like accessing variables. It's nice.
zhoujun wrote:
Does method can be compared to member function?
Yes, they are the same.
Christian
No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002
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It's good object-oriented practice to use get/set for object properties, that way, you can change the underlying representation of the data without breaking the access method (get/set). The real underlying value [field] that's returned or set in get/set is either stored by the object instance, or retrieved from elsewhere, and by abstracting the get/set instead of directly accessing the underlying value allows you to change the representation without "breaking" your object clients.
In C#, a property is a kind of method function, you just don't have to call it like a function 
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Your library of 'functions' becomes your class. So a definition of class is a collections of methods that perform similar functions.
The methods can get information passed to them using parameters or you can expose properties. Likewise you can have a method that you call which sets several values internally that you can retreive using properties.
Properties is a means of exposing private information within your class to the public. An advantage of doing this is many fold:
When a public consumer of your class puts data into a property you can hide complex calculations and processes that may be applied to that data. In a simple classroom example I show someone setting the number of gallons of beer the classroom is about to brew. Internally, I break that information out into the number of gallons, number of liters, computed weight by gallon in pounds, and computed weight in grams. All the user knows is that when they set gallons they can 'easily' find out how much they are making in liters.
Another benefit is something called data hiding. If you expose your public properties using simple data types, you can shelter the user of your class from any changes in the actual data behind the scenes. Your get/set properties handle the converstion of the data from the complex data types into the simple data types without their knowledge.
In general you can think of your class like a castle. Things go on inside of it that only those who are priveledged to be inside know what is happening. The properties are like small windows in the castle that let you see glimpses of whatever you are allowed to see within the castle. If you tell a courier at the door that troops must be sent to the north wall, you don't know everything that goes on to actually get those troops there. You just know it happens and your request is satisfied.
In practice, a well managed class library can be developed and tested once. Each time it is reused you only have to test your USE of the class, not the implementation within the class.
_____________________________________________
The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.
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I am a beginner of C#. Now I have a question about how to display bitmap files in MDI form window. Following are some code I wrote :
1. In the parent form :
m_bmp = (Bitmap)Bitmap.FromFile(openFileDialog.FileName);
Form2 frm = new Form2();
frm.MdiParent = this;
frm.SetBitmap(m_bmp);
frm.Show();
2. In the child form2 :
protected override void OnPaint (PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawImage(m_bmp, new Point(100,100));
}
About the running result, for the first time, it can successfully display a bitmap image(i1.bmp) in a child form window. But if I open another bitmap(i2.bmp) in another child form window, the previous form window will also changed to display i2.bmp.
How to solve this problem? Please help me.
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Consider this. There's a custom control, MyCtl which displays a tree of items. It has a collection of MyItem objects. Both MyCtl and MyItem have item collections (that is, you can have sub-items, sub-sub-items, and so forth). The item collections in MyCtl and MyItem are marked as DesignerSerializationVisibility.Content, so that they are saved in the code when modified through the designer. Items can successfully be added to the item collection of the MyCtl control, through the designer (collection editor). When sub-items are added, with the Collection Editor, an "Object reference not set to an instance of an object" message comes up when OK is clicked and the sub-items are lost.
I've created a small test project to show you this behavior, along with a set of instructions, shown below.
The ZIP file of the sample project is found at:
http://www.dacris.com/collections.zip
*ZIP file updated with VS.NET 2002 project files
Here are the instructions:
1. Open the attached Zip file and extract it to an empty folder.
2. Open Collections.sln in the VS.NET IDE.
3. Build the solution to generate the Collections class library.
4. Open Form1.cs in the Windows Forms designer.
5. Select the control containing the tree of strings (it is set to DockStyle=Fill, so just click the form's client area).
6. Scroll the property grid all the way down.
7. Click the '...' button next to the Items collection property.
8. Select the third item in the list of items.
9. In the property grid for that item, select the '...' button next to the Items collection property.
10. Click the Add button on the dialog box that comes up.
11. Select the newly added item and enter a string value for the Text property (such as 'The disappearing item') in the property grid of the newly added item.
12. Click OK. Notice how the item has appeared on the control in the form, and it is called 'The disappearing item'.
13. Click OK again on the dialog box that remains. An "Object reference not set to an instance of an object" message should appear. Click OK.
14. Click Cancel. Another message will appear. Click OK to close it.
15. Click Cancel again.
Notice how the item has now disappeared from both the control and the component tray, and the Form1 window is not marked as modified (asterisk).
How can I get the items to persist on infinite depth levels? How on earth did MS do it with the TreeView and Menu controls?  I am stuck and I need your help.
I shall award my full gratitude to the first person who manages to successfully add a sub-item and save it, and then explain to me how they did it.
Thanks in advance.
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It would help if I could open VS.NET 2003 beta files.....
"I dont have a life, I have a program." Also, I won't support any software without the LeppieRules variable.
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Oops..ok i'll fix that. download again in about 5 minutes. sorry
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When a new window is created, it automatically gets focus. How do I stop that? I want to make a form but keep the focus where it is.
"Outside of a dog, a book is Man’s best friend. And inside of a dog, it’s too dark to read."
-Groucho Marx
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