PassingValues from a class to a form

[Nick Beenham]

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Miha Markic]

Hi Nick,

Your problem is that AnotherClass has no clue on which Form1 (Form1 in your
case is a class type and not an isntance) instance to pass value to.
One way would be:
public void AddText(Form1 f)
{
f.TextBox.Text = "InsertText here";
}
--
Miha Markic - RightHand .NET consulting & software development
miha at rthand com

"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Champika Nirosh]

Hi,

Yes it should ask for the object reference...

you have several options here

1. Use singleton pattern to allow to access the main form from any where in
your project.
2. pass the main form obejct reference to the other class and use the
reference to do the modification

in any case you have to set the TextBox access level to internal (set the
Property Modifiers : Internal)

But if you feel uncomfortable of doing this drop me a Email..

Nirosh.

"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Nicholas Beenham]

Thanks for the help guys though now i have another related problem when
trying to AppendText to a multiline textbox.

An unhandled exception of type 'System.Argumen tOutOfRangeExce ption' occurred
in mscorlib.dll

Additional information: Index and length must refer to a location within the
string.

This is the error I get when trying to add text to a multiline textbox

Many many thanks

Any ideas on how to correct this
"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Champika Nirosh]

Hi,

I think you have not set the multiline property of the textbox to TRUE

but I feel that you need to use a list box and it will better suit your need

Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:Ox******** ******@TK2MSFTN GP11.phx.gbl...

Thanks for the help guys though now i have another related problem when
trying to AppendText to a multiline textbox.

An unhandled exception of type 'System.Argumen tOutOfRangeExce ption' occurred in mscorlib.dll

Additional information: Index and length must refer to a location within the string.

This is the error I get when trying to add text to a multiline textbox

Many many thanks

Any ideas on how to correct this
"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Nicholas Beenham]

Basically what im trying to do is create an on-screen log.
As events are fired between a set of objects I'm trying to get messages
posted up on screen sort of like a log of whats happening.

I was using a multiline textbox for this because it seemed to have the
functionality i required.

A listbox will have a collection and make this more complicated.
Any suggestions??
"Champika Nirosh" <cn*****@textce ntric.lk> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi,

I think you have not set the multiline property of the textbox to TRUE

but I feel that you need to use a list box and it will better suit your need
Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:Ox******** ******@TK2MSFTN GP11.phx.gbl...

Thanks for the help guys though now i have another related problem when
trying to AppendText to a multiline textbox.

An unhandled exception of type 'System.Argumen tOutOfRangeExce ption'

occurred

in mscorlib.dll

Additional information: Index and length must refer to a location within

the

string.

This is the error I get when trying to add text to a multiline textbox

Many many thanks

Any ideas on how to correct this
"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .

Can anyone give me a tip on how to pass a value from a
class to a windows form.

e.g. adding text to a textbox.

public class AnotherClass
{
//usual class code
public void AddText()
{
Form1.TextBox.T ext = "InsertText here";
}
}

It keeps asking for an object reference :(

Hope someone can help :)

Nick

[Champika Nirosh]

if you feel so then do it this way

set the multiline property to true

then change your method as

> public class AnotherClass
> {
> //usual class code
> public void AddText(string myText)
> {
> Form1.getTheMai nForm().statusT ext.AppendText( myText +"\r\n");
> }
> }
Note that I guess you are using singleton

This way it should work

Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:e5******** *****@TK2MSFTNG P11.phx.gbl...

Basically what im trying to do is create an on-screen log.
As events are fired between a set of objects I'm trying to get messages
posted up on screen sort of like a log of whats happening.

I was using a multiline textbox for this because it seemed to have the
functionality i required.

A listbox will have a collection and make this more complicated.
Any suggestions??
"Champika Nirosh" <cn*****@textce ntric.lk> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi,

I think you have not set the multiline property of the textbox to TRUE

but I feel that you need to use a list box and it will better suit your

need

Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:Ox******** ******@TK2MSFTN GP11.phx.gbl...

Thanks for the help guys though now i have another related problem

when trying to AppendText to a multiline textbox.

An unhandled exception of type 'System.Argumen tOutOfRangeExce ption'

occurred

in mscorlib.dll

Additional information: Index and length must refer to a location

within the

string.

This is the error I get when trying to add text to a multiline textbox

Many many thanks

Any ideas on how to correct this
"Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:07******** *************** *****@phx.gbl.. .
> Can anyone give me a tip on how to pass a value from a
> class to a windows form.
>
> e.g. adding text to a textbox.
>
> public class AnotherClass
> {
> //usual class code
> public void AddText()
> {
> Form1.TextBox.T ext = "InsertText here";
> }
> }
>
> It keeps asking for an object reference :(
>
> Hope someone can help :)
>
> Nick

[Nicholas Beenham]

DOH! I was being a quality NUMPTY :( Got it sorted, was an issue with the
singleton and main, thanks for the tips, watch this space for delegate and
event questions next

Nick
"Champika Nirosh" <cn*****@textce ntric.lk> wrote in message
news:O0******** *****@tk2msftng p13.phx.gbl...

if you feel so then do it this way

set the multiline property to true

then change your method as

> > public class AnotherClass
> > {
> > //usual class code
> > public void AddText(string myText)
> > {
> > Form1.getTheMai nForm().statusT ext.AppendText( myText +"\r\n");>> }
> > }
Note that I guess you are using singleton

This way it should work

Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:e5******** *****@TK2MSFTNG P11.phx.gbl...

Basically what im trying to do is create an on-screen log.
As events are fired between a set of objects I'm trying to get messages
posted up on screen sort of like a log of whats happening.

I was using a multiline textbox for this because it seemed to have the
functionality i required.

A listbox will have a collection and make this more complicated.
Any suggestions??
"Champika Nirosh" <cn*****@textce ntric.lk> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi,

I think you have not set the multiline property of the textbox to TRUE

but I feel that you need to use a list box and it will better suit your

need

Nirosh.

"Nicholas Beenham" <ni**********@b lueyonder.co.uk > wrote in message
news:Ox******** ******@TK2MSFTN GP11.phx.gbl...
> Thanks for the help guys though now i have another related problem

when > trying to AppendText to a multiline textbox.
>
> An unhandled exception of type 'System.Argumen tOutOfRangeExce ption'
occurred
> in mscorlib.dll
>
> Additional information: Index and length must refer to a location within the
> string.
>
> This is the error I get when trying to add text to a multiline

textbox >
> Many many thanks
>
> Any ideas on how to correct this
> "Nick Beenham" <ni**********@b lueyonder.co.uk > wrote in message
> news:07******** *************** *****@phx.gbl.. .
> > Can anyone give me a tip on how to pass a value from a
> > class to a windows form.
> >
> > e.g. adding text to a textbox.
> >
> > public class AnotherClass
> > {
> > //usual class code
> > public void AddText()
> > {
> > Form1.TextBox.T ext = "InsertText here";
> > }
> > }
> >
> > It keeps asking for an object reference :(
> >
> > Hope someone can help :)
> >
> > Nick
>
>