没有从代码中画出任何线条 [英] No line is drawn from the code

问题描述

你好，

为什么没有在屏幕上用以下代码绘制一条线??

Hi there,

Why doesn''t a Line get drawn on the screen with below code???

//Declaration
public Graphics obj_Graphics;
private Bitmap obj_Bitmap;

//Coding
        obj_Bitmap = new Bitmap(1000, 1000);
        obj_Graphics = Graphics.FromImage(obj_Bitmap);
        obj_Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 5), 100, 500, 400, 500);

在此先感谢...

Thanks in advance...

推荐答案

您正在使用一些声明为自己的对象.它们在内存中，但不在屏幕上.看看一个简单的示例的链接，该链接在处理表单时如何执行:
http://www.geekpedia.com/tutorial50_Drawing-with-Csharp.html [ ^ ]

如果要使用网页上创建的内容，请查看以下链接:
http://msdn.microsoft.com/en-us/library/system. web.httpresponse.outputstream.aspx [ ^ ]

祝您好运！

You are using some objects you declared yourself. These are in memory but not on screen. Have a look at the link for a simple example how to do it when working with forms:
http://www.geekpedia.com/tutorial50_Drawing-with-Csharp.html[^]

If you want to use the created content on your web page, have a look at this link:
http://msdn.microsoft.com/en-us/library/system.web.httpresponse.outputstream.aspx[^]

Good luck!

因为您不在屏幕上绘制，所以您正在绘制位图:

Because you are not drawing on the screen, you are drawing on a bitmap:

obj_Graphics = Graphics.FromImage(obj_Bitmap);

如果要在屏幕上绘制它，请处理窗体或窗体上的面板的Paint事件，并使用在EventArgs参数中处理的Graphics对象:

If you want to draw it i=on teh screen, then handle the Paint event for your form, or a panel on your form and use the Graphics object you are handled in the EventArgs parameter:

e.Graphics.DrawLine(new Pen(new SolidBrush(Color.Black), 5), 100, 500, 400, 500);

这篇关于没有从代码中画出任何线条的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！