Simple question

[pawelr74@gmail.com]

Hello all,
I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?)

code:
myTool class is in folder App_Code

public class myTool
{

public int GetIdUser(strin g UserName)
{
............
}
public void NewUser(string UserName, string Imie, string Nazwisko)
{
.....
}
}

I try use method in class on root application:


using .....
using myTool ; /// error message
public partial class _Default : System.Web.UI.P age
{

protected void Page_Load(objec t sender, EventArgs e)
{

}
protected void Login1_LoggedIn (object sender, EventArgs e)
{
Session["idUser"] = GetIdUser(Login 1.UserName);
}
}

How can I correct my code?

Thanks for yours help

BR.

Pawel

[Peter Duniho]

Re: Simple question

On Thu, 25 Sep 2008 16:24:34 -0700, <pawelr74@gmail .comwrote:

Hello all,
I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?) [...]

You may need to add the assembly where the class is defined as a reference
to your project. Hard to say without literally looking over your
shoulder, but that's what the error means when it suggests you might be
missing "an assembly reference".

You might want to start with some of the tutorial/sample applications on
the MSDN web site or elsewhere, at least some of which should lead you
through these sorts of basic mechanics that might be unfamiliar to
beginners but are essential for getting the compilation environment
configured correctly. Once you're more familiar with how the IDE works,
these kinds of error messages will be much less opaque.

Pete

[Family Tree Mike]

Re: Simple question

In VB you didn't use import to help what you have here. You never created
an
instance of the myTool class in your code. Something like the following
would
be necessary:

myTool t = new myTool();
Session["idUser"] = t.GetIdUser(Log in1.UserName);

There is probably more to it than this though as the instance of myTool may
need to be kept around. We don't know enough about the myTool class to
know for sure.

<pawelr74@gmail .comwrote in message
news:ae5b8b9f-aa9d-4215-ba18-ec689b17915a@o4 0g2000prn.googl egroups.com...

Hello all,
I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?)
>
code:
myTool class is in folder App_Code
>
public class myTool
{
>
public int GetIdUser(strin g UserName)
{
............
}
public void NewUser(string UserName, string Imie, string Nazwisko)
{
.....
}
}
>
I try use method in class on root application:
>
>
using .....
using myTool ; /// error message
public partial class _Default : System.Web.UI.P age
{
>
protected void Page_Load(objec t sender, EventArgs e)
{
>
}
protected void Login1_LoggedIn (object sender, EventArgs e)
{
Session["idUser"] = GetIdUser(Login 1.UserName);
}
}
>
How can I correct my code?
>
Thanks for yours help
>
BR.
>
Pawel

[Hans Kesting]

Re: Simple question

pawelr74@gmail. com expressed precisely :

Hello all,
I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?)
>
code:
myTool class is in folder App_Code
>
public class myTool
{
>
public int GetIdUser(strin g UserName)
{
............
}
public void NewUser(string UserName, string Imie, string Nazwisko)
{
.....
}
}
>
I try use method in class on root application:
>
>
using .....
using myTool ; /// error message
public partial class _Default : System.Web.UI.P age
{
>
protected void Page_Load(objec t sender, EventArgs e)
{
>
}
protected void Login1_LoggedIn (object sender, EventArgs e)
{
Session["idUser"] = GetIdUser(Login 1.UserName);
}
}
>
How can I correct my code?
>
Thanks for yours help
>
BR.
>
Pawel

Does that class (myTool) live in a namespace? If not, add something
like this around your class:

namespace MyToolsNamespac e
{
// your class definition
}


The "using directive" accepts only namespaces, not classnames.
So that would be "using MyToolsNamespac e;", using the example above.

And as Mike said, you need an instance of this class to use it's
methods.

By the way, the regular naming conventions specify that a classname
should start with an uppercase letter (MyTool).

Hans Kesting

[Jon Skeet [C# MVP]]

Re: Simple question

On Sep 26, 12:24 am, pawel...@gmail. com wrote:

I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?)

The using directive is used to make a *namespace* available, not a
type. What namespace is "myTool" in?

Jon

[=?Utf-8?B?RmFtaWx5IFRyZWUgTWlrZQ==?=]

Re: Simple question

In a web application the IDE does not add a namespace for these helper
classes. A namespace is not really necessary in this case. You are correct
that a using statement would need a namespace though.

"Hans Kesting" wrote:

pawelr74@gmail. com expressed precisely :

Hello all,
I'm beginner in c#. In my web application I have class myTool with few
public methods. How can I attached this class to other classes and use
method from myTool class.
In VB I can use Import, but if I try use using in C# I have
Error Message
The type or namespace name 'type/namespace' could not be found (are
you missing a using directive or an assembly reference?)

code:
myTool class is in folder App_Code

public class myTool
{

public int GetIdUser(strin g UserName)
{
............
}
public void NewUser(string UserName, string Imie, string Nazwisko)
{
.....
}
}

I try use method in class on root application:


using .....
using myTool ; /// error message
public partial class _Default : System.Web.UI.P age
{

protected void Page_Load(objec t sender, EventArgs e)
{

}
protected void Login1_LoggedIn (object sender, EventArgs e)
{
Session["idUser"] = GetIdUser(Login 1.UserName);
}
}

How can I correct my code?

Thanks for yours help

BR.

Pawel

>
Does that class (myTool) live in a namespace? If not, add something
like this around your class:
>
namespace MyToolsNamespac e
{
// your class definition
}
>
>
The "using directive" accepts only namespaces, not classnames.
So that would be "using MyToolsNamespac e;", using the example above.
>
And as Mike said, you need an instance of this class to use it's
methods.
>
By the way, the regular naming conventions specify that a classname
should start with an uppercase letter (MyTool).
>
Hans Kesting
>
>
>