c# - Passing string between form using property doesnt work -

i know there's lot of posts here explaining how pass string between form using property method, can't make work. have form1 , form2, in form1, open bitmap, , want pass path form2, can access bitmap later. if change property value inside form1, it's ok, when load form2 , try access information, null. don't know doing wrong, if take , find mistake, apreciate.

here code

form1

public partial class form1 : form {     public form1()     {         initializecomponent();     }      string teste;     public string filepath // property     {                  {             return teste;         }         set         {             teste = value;         }     }   private void openmap_click(object sender, eventargs e) // opens bitmap     {      try         {             openfiledialog open = new openfiledialog();             if (open.showdialog() == dialogresult.ok)             {                 bitmap bit = new bitmap(open.filename);                 picturebox2.image = bit;                 picturebox2.borderstyle = borderstyle.fixed3d;                 picturebox2.sizemode = pictureboxsizemode.stretchimage;                 this.filepath = open.filename;  // update property             }         }         catch (exception)         { throw new applicationexception("falied loading image"); }     }  private void next1_click(object sender, eventargs e) // opens form2     {         form2 inicio = new form2();         inicio.show();         this.hide();     }   private void ssc1_1_load(object sender, eventargs e)     {      }  } 

}

---

form 2

public partial class form2 : form {      public form2()     {         initializecomponent();     }      private void form2_load(object sender, eventargs e)     {      }      private void button1_click(object sender, eventargs e)     {        form1 obj = new form1();        messagebox.show(obj.filepath);     } } 

the problem messagebox null..

thanks in advance cheers

if want use property send information, form 2 needs reference instance of form 1 access it.

right creating new instance of form 1 form 2, not same instance 1 stored value in parameter, parameter of form doesn't have value.

you can pass referene form 1 constructor of form 2:

form2 inicio = new form2(this); 

in constructor store reference later:'

private form1 _form1;  public form2(form1 form1) {     _form1 = form1;     initializecomponent(); } 

when need value in property, use reference:

messagebox.show(_form1.filepath); 

an alternative using property , passing form reference constructor, pass value constructor. however, having reference form allows add more properties if need pass more information between forms.