Draw windows forms c#

Dispose ; bluePen. Dispose ; greenPen. Dispose ; blackPen. We've drawn four lines starting at point 20, Drawing Connected Lines Sometimes we need to draw multiple connected straight line segments. One way to do this is to call the DrawLine method multiples times. This method has two overloaded forms. The code in Listing 3.

This book teaches. View All. Drawing on a Picturebox is preferred over other methods such as drawing on the background of a Form because Pictureboxes are double-buffered and will produce flicker-free rendering. The strategy here is to place a Picturebox where we want our graphics to go, then we will create a Bitmap the size of the Picturebox, render onto it, then assign it to the Picturebox's Image property.

The code used to draw lines is similar to what we saw in the previous example, but with a few key differences:. Improper disposal of these objects can result in serious stability and performance issues! See the discussion on the Drawing in C article for details. The Render method won't run unless we tell it to. Let's have it run when the program launches, when the window is resized, and when we click on the picturebox.

This is a good start at drawing in a Windows Forms application, but it has a flaw: calls to the render method block the GUI thread. This isn't a problem if your renderer is very fast, but as it gets slow your GUI will become less responsive.

A later article will demonstrate how to move the renderer into another thread so you can draw and animate graphics without blocking the GUI thread. Code on this page has using statements like those below, and this article has warnings about respecting IDisposable. If you'd like to jump in and get started right away, see Getting Started with Graphics Programming. It has topics on how to use code to draw lines, shapes, text, and more on Windows forms.

Graphics Overview Provides an introduction to the graphics-related managed classes. Drawing2D Provides advanced two-dimensional and vector graphics functionality.

The classes in this namespace can be used to create and use collections of fonts. Printing Provides printing functionality.