Can a Windows Form return a value?

[VMI]

In my Windows application, the main Form (Form_Main) calls a small Form
(Form_X) that checks a file. Basically, I pass the name of the file through
frmX's constructor and then I display it with ShowDialog(). In the
constructor, I call the method that runs the validation process. Is it
possible that, once this process (which returns a bool) is finished, that it
returns this value to the main Window ? Baically, I want to pass the return
value of checkRecordsLength() to Form_Main without having to add any
variables or references.

So, from Form_Main, I instantiate frmX:

Form_X frmX= new Form_X(sFileName);
frmCheck.ShowDialog();

---------------------------
In my Form_X:

public Form_X(string sFileName, ref bool isValid)
{
InitializeComponent();
_sFileName = sFileName;
checkRecordsLength();
}
private bool checkRecordsLength()
{
/* validate _sFileName *./
if (fileIsValid)
return true;
else
return false;
}



Thanks.

 

[Guest]

You might use a public static variable in a component (dll) and use this
component to transfer information from one form /proccess to another by
setting this variable status before closing the proccess, and retrieving it's
value through the the main form.
Hope it helps
Michael

 

[Thomas P. Skinner [MVP]]

ShowDialog returns a DialogResult which is an enum. Among the values are YES
and NO. You can easily use these to return the equivalent of a bool.

Thomas P. Skinner [MVP]

 

[The Last Gunslinger]

In my Windows application, the main Form (Form_Main) calls a small Form
(Form_X) that checks a file. Basically, I pass the name of the file through
frmX's constructor and then I display it with ShowDialog(). In the
constructor, I call the method that runs the validation process. Is it
possible that, once this process (which returns a bool) is finished, that it
returns this value to the main Window ? Baically, I want to pass the return
value of checkRecordsLength() to Form_Main without having to add any
variables or references.

Ignoring you preference to not add any variables

Overload showdialog and return your bool result as an out or ref param
is what I have done in the past.

This works very neatly and has the added advantage of not perverting
dialogresult to your specific case (IMHO )

Other ideas always appreciated.

Cheers
JB