C# 如何创建 1024x1024 RGB 白色位图图像？
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How to create 1024x1024 RGB bitmap image of white?
提问by Tae-Sung Shin
It's embarrassing to ask this question but can't find an answer.
问这个问题很尴尬，但找不到答案。
I tried this in vain.
我徒劳地尝试了这个。
Image resultImage = new Bitmap(image1.Width, image1.Height, PixelFormat.Format24bppRgb);
using (Graphics grp = Graphics.FromImage(resultImage))
{
grp.FillRectangle(
Brushes.White, 0, 0, image1.Width, image1.Height);
resultImage = new Bitmap(image1.Width, image1.Height, grp);
}
I basically want to fill a 1024x1024 RGB bitmap image with white in C#. How can I do that?
我基本上想在 C# 中用白色填充 1024x1024 RGB 位图图像。我怎样才能做到这一点？
采纳答案by Joey
You are assigning a new image to resultImage, thereby overwriting your previous attempt at creating a white image (which should succeed, by the way).
您正在为 分配一个新图像resultImage，从而覆盖您之前创建白色图像的尝试（顺便说一下，这应该会成功）。
So just remove the line
所以只需删除该行
resultImage = new Bitmap(image1.Width, image1.Height, grp);
回答by Lee Harrison
You almost had it:
你几乎拥有它：
private Bitmap DrawFilledRectangle(int x, int y)
{
Bitmap bmp = new Bitmap(x, y);
using (Graphics graph = Graphics.FromImage(bmp))
{
Rectangle ImageSize = new Rectangle(0,0,x,y);
graph.FillRectangle(Brushes.White, ImageSize);
}
return bmp;
}
回答by prashanth
Another approach,
另一种做法，
Create a unit bitmap
创建单位位图
var b = new Bitmap(1, 1);
b.SetPixel(0, 0, Color.White);
And scale it
并缩放它
var result = new Bitmap(b, 1024, 1024);
回答by Top Systems
Bitmap bmp = new Bitmap(1024, 1024);
using (Graphics g = Graphics.FromImage(bmp)){g.Clear(Color.White);}
