Mutual access to forms in C #

1. When constructing a subform object in the parent form, pass the parent form past:

such as: Frmsub frm=new frmsub (this);//this represents the parent form

2. Modify the variables and methods to be accessed in the parent form to public

3. Define a global variable for the parent form in the subform class:

For example, the private dynamic m_parentcontainer;//uses dynamic to dynamically identify the type of the variable

4. Add Reference Microsoft.CSharp.dll

5, in want to visit place directly through M_parentcontainer. Variable name or M_parentcontainer. Method name Access