c# - how can i control listview located in form1 from form2 to refresh it -

i want refresh listview1 located in form1. created code fires public void refresh or make listview1.visible = false; nothing works except messagebox.show("test");

how make work?

public void refeshlistview()    {         this.listview1.beginupdate();         messagebox.show("s");//this shows! only:\ !?!?!?        listview1.visible = false;        listview1.height = 222;        listview1.endupdate();        listview2.clear();     } 

i little unclear trying do, title sounds want influence listview on form1 form2. assuming form2 created form1. in case have 2 ways can think of this, first create custom constructor , pass form instance or assign ownership when show form. second create custom event on form2 , subscribe in form1.

the first method:

in form1 when show form2 use frm2.show(this);
in form2 when want call refresh method use ((form1)parent).refreshlistview();

or create custom constructor form2

form1

public partial class form1 : form {     form2 frm2;     public form1()     {         initializecomponent();         frm2 = new form2(this);         frm2.show();     }      void frm2_refreshlist(object sender, eventargs e)     {         refreshlistview();     }      public void refreshlistview()     {          this.listview1.beginupdate();          messagebox.show("s");//this shows! only:\ !?!?!?         listview1.visible = false;         listview1.height = 222;         listview1.endupdate();         listview1.clear();      } } 

form2

public partial class form2 : form {     form1 frm1;     public form2()     {         initializecomponent();     }     public form2( form frm)     {         initializecomponent();         frm1 = (form1)frm;     }     private void button1_click(object sender, eventargs e)     {         frm1.refreshlistview();     } } 

the second method:

form1

public partial class form1 : form {     form2 frm2;     public form1()     {         initializecomponent();         frm2 = new form2();         frm2.refreshlist += new eventhandler(frm2_refreshlist);         frm2.show();     }      void frm2_refreshlist(object sender, eventargs e)     {         refreshlistview();     }      public void refreshlistview()     {          this.listview1.beginupdate();          messagebox.show("s");//this shows! only:\ !?!?!?         listview1.visible = false;         listview1.height = 222;         listview1.endupdate();         listview1.clear();      } } 

form2

public partial class form2 : form {     public event eventhandler refreshlist;      public form2()     {         initializecomponent();     }      private void button1_click(object sender, eventargs e)     {         refreshlist(this, eventargs.empty);     } }