如何在PictureBox图像上绘制图像 [英] How to draw an image onto a PictureBox Image

问题描述

我需要知道如何在PictureBox的图像上绘制多个图像.

I need to know how to draw more than one Image on a PictureBox's Image.

我已经使用了这段代码，但是它不起作用:

I have used this code but it doesn't work:

    private void button3_Click(object sender, EventArgs e)
    {

Bitmap bmp = new Bitmap(pictureBox2.Image);

Graphics g = Graphics.FromImage(bmp);

g.DrawImage(new Bitmap(@"C:\Users\Mena\Desktop\1.png"), new Point(182, 213));

pictureBox2.Image = bmp;
    }

推荐答案

稍作更改，您的代码就可以正常工作:

With a few changes your code will work fine:

private void button3_Click(object sender, EventArgs e)
{
    Bitmap bmp = new Bitmap(pictureBox2.Image);

    // whatever your plans where, we don't know ;-)
    // RectangleF rectf = new RectangleF(640F, 1100F, 0, 0);

    Graphics g = Graphics.FromImage(bmp);

    // DrawImage needs an image, not a string
    g.DrawImage(new Bitmap(@"C:\Users\Mena\Desktop\1.png"), new Point(182, 213));

    // flush is for finishing write operations
    // dispose is the command to get rid of GDI elements:
    g.Dispose();

    pictureBox2.Image = bmp;
}

推荐的编写方式为:

private void button3_Click(object sender, EventArgs e)
{
    Bitmap bmp = new Bitmap(pictureBox2.Image);
    using (Graphics g = Graphics.FromImage(bmp))
    {
        g.DrawImage(new Bitmap((@"C:\Users\Mena\Desktop\1.png"), new Point(182, 213));
    }
    pictureBox2.Image = bmp;
}

这篇关于如何在PictureBox图像上绘制图像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！