Cannot access a non-static member of outer type

Question

hi Using wrapper class concept need to draw multiple rectangles by using x,y,w,h entering textbox values in c# windows application. i tried but showing error Cannot access a non-static member of outer type 'WindowsFormsApplication3.Form1' via nested type

Sachin Singh · Answer

the variable or method which you are trying to access is outside the class where you are trying to access it create an object of the class and then access the method/property you won't get any error. wrapper class means wrapping two class onto one so that by create the object of wrapper class we could access the members of both the class. class Wrapper //Wrapper Class { class InnerClass //Inner Class { public Int32 ProcessData( int Val) { return Val + 1; } } public Int32 CallRapper() { Wrapper.InnerClass wpr = new Wrapper.InnerClass(); // Internally call to Wrapper class. return wpr.ProcessData(100); } } class Program { static void Main( string [] args) { Wrapper w = new Wrapper(); Console.WriteLine( "Data Process by inner class and show by Wrapper Class:-" + w.CallRapper()); Console.ReadLine(); } }

Mageshwaran R · Answer

Hi SJ, Please refer this link,It may help you, https://stackoverflow.com/questions/16320935/cannot-access-a-non-static-member-of-outer-type-via-nested-type#:~:text=4%20Answers&text=The%20problem%20is%20that%20nested,outer%20class%20are%20not%20inherited.&text=you%20need%20to%20instantiate%20an,is%20not%20a%20static%20method.

S J · Answer

in seprate class how to call paint events like draw ractangle, graphics methods

Rajanikant Hawaldar · Answer

Agree with @Sachin, you can also mark method as static to come out of this error.