Communication between the WinForm form and the form

Create two form,parentform and Childform,childform in C # to define the build in ParentForm.

First, pass the variable in the ParentForm to ChildForm

1. Add a member variable to the ChildForm

Public ParentForm Myparentform;

2. Add an ChildForm instance to the ParentForm

ChildForm mychildform = new ChildForm ();

Mychildform.myparentform = this;

Mychildform.dialogshow ();

This allows you to invoke parentform public methods and public properties in ChildForm.

Myparentform.dothings ();

Myparentform.m_strtemp;

Second, pass the variable in the ChildForm to ParentForm

1. Add a member variable to the ChildForm

public string m_strtemp;

2. Add a ChildForm instance to the ParentForm and assign the value after it.

ChildForm mychildform = new ChildForm ();

Mychildform.m_strtemp = this.m_strtemp;