Access Form Controls From Another Class?

[Michael Ramey]

How can controls on a Windows Form be accessed (or referenced) from another
Class? I know how to do it from another Form. The following doesn't work
even though the Control Modifiers property is set to "Public":

frmMain.myContr ol

Thanks.

Michael

[100]

Hi Michael,
What does *doesn't work* mean? Is there some compiler error message? It has
to work as long as the myControl is public. I suppose frmMain is the member
variable of the *other* class and it is initilized with the reference to the
form.
Make sure as well that the frmMain's type is the type that has myControl
field.

for example:
class MyForm: Form
{
public Control myControl = .....
}

if you have

Form frmMain = <reference to MyForm object>
and you try

frmMain.myConrt rol.....

it won't work because Form class doesn't have myControl member variable.

However, if you have

MyForm frmMain = <reference to MyForm object>

frmMain.myContr ol....

has to work.

HTH
B\rgds
100
"Michael Ramey" <ra*****@hotmai l.com> wrote in message
news:eu******** *****@TK2MSFTNG P09.phx.gbl...

How can controls on a Windows Form be accessed (or referenced) from another Class? I know how to do it from another Form. The following doesn't work
even though the Control Modifiers property is set to "Public":

frmMain.myContr ol

Thanks.

Michael

[Michael Ramey]

The compiler error message is:

An object reference is required for the nonstatic field, method, or
property.

The following code allowed me to access the control:

frmMain frmActive = (frmMain)frmMai n.ActiveForm;
frmActive.myCon trol...

Is there a better way?

Thanks.

Michael

"100" <10*@100.com> wrote in message
news:O2******** ******@tk2msftn gp13.phx.gbl...

Hi Michael,
What does *doesn't work* mean? Is there some compiler error message? It has to work as long as the myControl is public. I suppose frmMain is the member variable of the *other* class and it is initilized with the reference to the form.
Make sure as well that the frmMain's type is the type that has myControl
field.

for example:
class MyForm: Form
{
public Control myControl = .....
}

if you have

Form frmMain = <reference to MyForm object>
and you try

frmMain.myConrt rol.....

it won't work because Form class doesn't have myControl member variable.

However, if you have

MyForm frmMain = <reference to MyForm object>

frmMain.myContr ol....

has to work.

HTH
B\rgds
100
"Michael Ramey" <ra*****@hotmai l.com> wrote in message
news:eu******** *****@TK2MSFTNG P09.phx.gbl...

How can controls on a Windows Form be accessed (or referenced) from

another

Class? I know how to do it from another Form. The following doesn't work even though the Control Modifiers property is set to "Public":

frmMain.myContr ol

Thanks.

Michael

[Tyler Dixon]

The confusion lies in your naming convention.

Since frmMain uses camel notation, a C# developer using MS's conventions
will naturally assume that it's a member/local variable.

Anyways, you need to pass a reference to the form to the object that you
want to access its control.

public class MyControlAccess or
{
public MyControlAccess or(frmMain mainForm)
{
mainForm.myCont rol.....
}
}

"Michael Ramey" <ra*****@hotmai l.com> wrote in message
news:uG******** ******@tk2msftn gp13.phx.gbl...

The compiler error message is:

An object reference is required for the nonstatic field, method, or
property.

The following code allowed me to access the control:

frmMain frmActive = (frmMain)frmMai n.ActiveForm;
frmActive.myCon trol...

Is there a better way?

Thanks.

Michael

"100" <10*@100.com> wrote in message
news:O2******** ******@tk2msftn gp13.phx.gbl...

Hi Michael,
What does *doesn't work* mean? Is there some compiler error message? It

has

to work as long as the myControl is public. I suppose frmMain is the

member

variable of the *other* class and it is initilized with the reference to

the

form.
Make sure as well that the frmMain's type is the type that has myControl
field.

for example:
class MyForm: Form
{
public Control myControl = .....
}

if you have

Form frmMain = <reference to MyForm object>
and you try

frmMain.myConrt rol.....

it won't work because Form class doesn't have myControl member variable.

However, if you have

MyForm frmMain = <reference to MyForm object>

frmMain.myContr ol....

has to work.

HTH
B\rgds
100
"Michael Ramey" <ra*****@hotmai l.com> wrote in message
news:eu******** *****@TK2MSFTNG P09.phx.gbl...

How can controls on a Windows Form be accessed (or referenced) from

another

Class? I know how to do it from another Form. The following doesn't

work even though the Control Modifiers property is set to "Public":

frmMain.myContr ol

Thanks.

Michael