How to make a variable accessible to the whole application?

[adodotnet20]

I'm developing a Windows application and I'm having some problems in
making variable accessible to the whole application. I use VS.NET 2005
and I create a database connection object in the method private void
connect_Click(o bject sender, EventArgs e). That object I create seems
to be accessible only within that method, how do I make it accessible
to the whole application, just like I have access to mytextbox.text
throughout my tabbed form? Where do you keep your connection object
usually?

Thank you.

[Mr Icekirby]

C# does not support global variables. You can declare variables outside of
functions. These are called member variables.

class Fake
{
public int MyInt;
}

Anything accessing Fake.MyInt can read it. If you have a function in the
class, it can also read MyInt.

"ad*********@gm ail.com" wrote:

I'm developing a Windows application and I'm having some problems in
making variable accessible to the whole application. I use VS.NET 2005
and I create a database connection object in the method private void
connect_Click(o bject sender, EventArgs e). That object I create seems
to be accessible only within that method, how do I make it accessible
to the whole application, just like I have access to mytextbox.text
throughout my tabbed form? Where do you keep your connection object
usually?

Thank you.

[Ben Voigt]

<ad*********@gm ail.comwrote in message
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

I'm developing a Windows application and I'm having some problems in
making variable accessible to the whole application. I use VS.NET 2005
and I create a database connection object in the method private void
connect_Click(o bject sender, EventArgs e). That object I create seems
to be accessible only within that method, how do I make it accessible
to the whole application, just like I have access to mytextbox.text
throughout my tabbed form? Where do you keep your connection object
usually?

You would do that with a class member variable.

You are not ready for database access if you are unfamiliar with basic
programming concepts such as scope. I suggest that you complete a tutorial
that teaches structured programming and object-oriented programming in C#
before continuing work on your application.

>
Thank you.

[C# Beginner]

I'm one of those guys who don't like public variables. My solution is this:
Create a database class in which you store database members such as
connectionstrin g property/variable, Open() methods etc. In the starting form
I create an instance of this database class. When another form needs access
to the database, I parse the instance using the tag property tag of the
form.

NewForm.Tag = (object) myDatabase;

Within the new form you can use
.... = (Database) this.tag.

hope you can use it

DD
<ad*********@gm ail.comschreef in bericht
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

I'm developing a Windows application and I'm having some problems in
making variable accessible to the whole application. I use VS.NET 2005
and I create a database connection object in the method private void
connect_Click(o bject sender, EventArgs e). That object I create seems
to be accessible only within that method, how do I make it accessible
to the whole application, just like I have access to mytextbox.text
throughout my tabbed form? Where do you keep your connection object
usually?

Thank you.

[Peter Bromberg [C# MVP]]

Just add a separate class file to your application and add in all the
required fields as public with the "static" modifier.
Then you can refer to these from anywhere with "MyStuff.FieldN ame".
Peter
--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"ad*********@gm ail.com" wrote:

I'm developing a Windows application and I'm having some problems in
making variable accessible to the whole application. I use VS.NET 2005
and I create a database connection object in the method private void
connect_Click(o bject sender, EventArgs e). That object I create seems
to be accessible only within that method, how do I make it accessible
to the whole application, just like I have access to mytextbox.text
throughout my tabbed form? Where do you keep your connection object
usually?

Thank you.