我想将一个矩形从一个Event函数传递给另一个Event函数

问题描述

我想将矩形从一个函数传递给第二个函数

由于某种原因，rectangel读取事件函数为null

我该怎么做？

I want to to pass a rectangle from one function to a second function
For some reason the rectangel read to the event function as null
How can I do this?

private Point startpoint;
        private Rectangle rect;

        private void canvas1_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {

            startpoint = Mouse.GetPosition(canvas1);

  // the rectengle that i creat and i what to pass him to the canvas1_MouseMove Event function 
            Rectangle rect = new Rectangle();
            rect.Stroke = Brushes.Black;
            rect.StrokeThickness = 1;


            canvas1.Children.Add(rect);



        }



        private void canvas1_MouseMove(object sender, MouseEventArgs e)
        {
           //to here i want to pass the rectangle  
           // when i debug the code the rect value is null!
           // so i cant control his Properties


                rect.Width = 5;// her i got excsption 
                               //"Object reference not set to an instance of an object."
                rect.Height = 6;





        }

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