There is a MDI main form (MAINFORM), a child form (Childform) and another sub-form (Listform),
The process they created is like this:
Click on a button of the main form Mainform; display ChildForm, click on the ChildForm, display listform, and save a variable while getting saved variables.
// Master's code
Public Class Mainform
{
....
Private static childform;
Private static listform listform;
Private static string Str;
/ / Generator Subform ChildForm
Private void button_1 (Object Sender, System.EventArgs E)
{
Childform = getChildForm ();
ChildForm.mdiparent = this;
ChildForm.show ();
}
Private void getChildform ()
{
if (ChildForm == Null)
{
ChildForm = new childform ();
}
Return CHildForm;
}
Public void showlistform ()
{
Listform = getListForm ();
Listform.mdiparent = this;
Listform.show ();
}
Private void getListform ()
{
IF (Listform == Null)
{
Listform = new listform ();
}
Return ListForm;
}
Public Static String Uid
{
Get {return str;}
SET {str = value;}
}
}
// Subform Childform
Public Class ChildForm
{
...
Private void button1_click (...)
{
String str = "abc";
Mainform.UID = STR;
Mainform mf = (mainform) this.mdiparent;
Mf.showlistform ();
}
}
// Form Listform
Public Class ListForm
{
Private void getdata ()
{
String str = mainform.UID
Messagebox.show (STR);
}
}
