从图形创建图像 [英] Create Image from Graphics

问题描述

在 VB.NET 中，我需要基于我拥有的 Graphics 对象创建一个 Image.但是没有Image.fromGraphics()等方法，那我该怎么办?

In VB.NET, I need to create an Image based on a Graphics object I have. However, there is no method such as Image.fromGraphics() etc. What should I do then?

推荐答案

试试这样的MSDN文章 状态.本质上是从 Bitmap 创建一个 Graphics 对象.然后使用 Graphic 方法对 Image 执行您需要的操作，然后您可以根据需要使用 Image.正如@Damien_The_Unbeliever 所说，您的图形对象是为了在另一个对象上绘图而创建的，它没有要复制的图像，而创建它的对象却有.

Try something like this MSDN article states. Essentialy create a Graphics Object from a Bitmap. Then use Graphic methods to do what you need to to the Image and then you can use the Image how you need to. As @Damien_The_Unbeliever stated your Graphics Object is created to enable drawing on another object, it does not have an Image to copy, the object it was created on does.

来自以上文章:

Dim flag As New Bitmap(200, 100)
Dim flagGraphics As Graphics = Graphics.FromImage(flag)
Dim red As Integer = 0
Dim white As Integer = 11
While white <= 100
    flagGraphics.FillRectangle(Brushes.Red, 0, red, 200, 10)
    flagGraphics.FillRectangle(Brushes.White, 0, white, 200, 10)
    red += 20
    white += 20
End While
pictureBox1.Image = flag

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