Declare public variable in C#

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Guest

I am beginner in using C#, actually I am trying to move from VB6 to C#
I need very small help in programming problem my be you will laugh when you
get it
That simply I have to form let’s say Form1 (main form) and Form2, there is
parameter in form2 I have to called from form1.
So please would you tell me how?

Any way thanks
 
MMSJED said:
I am beginner in using C#, actually I am trying to move from VB6 to C#
I need very small help in programming problem my be you will laugh when you
get it
That simply I have to form let's say Form1 (main form) and Form2, there is
parameter in form2 I have to called from form1.
So please would you tell me how?

Any way thanks
Click to expand...

assuming you have a class called Form1:

class Form1
{
// declare a public variable in the form.
public int param;
}

class Form2
{
// A method to use the variable in a form1 object
private void myfunction( Form1 f1 )
{
int mynum = f1.param;
}
}

To find the forms from other forms, you can easily pass them
in the constructor.

class Form2
{
Form1 pParent = null;

public Form2( Form1 parent )
{
pParent = parent;
}
private void myfunction ()
{
int mynum = pParent.param;
}
}

Naturally, you want to check for pParent being null and such.

Hope that helps.
Matt
 
thank you Matt but What I tried is like this
//I call public variable lets say SqlReportPar in Form1

Public string SqlReportPar;

//Then go to Form2
Form test=new Form1();
Test.(the SqlReportPar does not appear) why?????

//What happened?
Form test=new Form1(). //(the SqlReportPar appear here )!!!!!
Test. //(the SqlReportPar does not appear) why?????
 
MMSJED said:
thank you Matt but What I tried is like this
//I call public variable lets say SqlReportPar in Form1

Public string SqlReportPar;

//Then go to Form2
Form test=new Form1();
Test.(the SqlReportPar does not appear) why?????

//What happened?
Form test=new Form1(). //(the SqlReportPar appear here )!!!!!
Test. //(the SqlReportPar does not appear) why?????
Click to expand...

try this:

Form test = new Form1();
test.SqlReportPar

or

Form Test = new Form1();
Test.SqlReportPar

From your code, you appear to be using "Test" rather than "test". Remember,
C# is case sensitive.

Cletus
 
MMSJED said:
thank you Matt but What I tried is like this
//I call public variable lets say SqlReportPar in Form1

Public string SqlReportPar;

//Then go to Form2
Form test=new Form1();
Test.(the SqlReportPar does not appear) why?????

//What happened?
Form test=new Form1(). //(the SqlReportPar appear here )!!!!!
Test. //(the SqlReportPar does not appear) why?????
Click to expand...

Well, assuming that Public is really "public" and "Test" is really
"test"...
the only thing I can think of easily is that the two are not within the
same namespace, thus Form2 does not know about Form1. Otherwise, C# is
VERY case
sensitive, so the cases must match for everything.

Matt
 
You declared your variable 'test' as type Form when it should have been
type Form1:

//(Watch for typos)

Form1 test = new Form1;
test.SqlReportPar = ......
 
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