c# - 试图在winform c#中放大图像

Question

在 button1_Click 上，我试图将图像的大小增加 10 或放大它。但是正在发生的事情是图片框的大小正在增加，而图像没有发生任何事情。如何进行图像缩放。请建议我最简单的方法。

public partial class Form1 : Form
{
public Form1()
{
    InitializeComponent();
}
private void pictureBox1_Click(object sender, EventArgs e)
{
    // Construct an image object from a file in the local directory.
    // ... This file must exist in the solution.
    Image image = Image.FromFile("Picture1.png");
    // Set the PictureBox image property to this image.
    // ... Then, adjust its height and width properties.
    pictureBox1.Image = image;
    pictureBox1.Height = image.Height;
    pictureBox1.Width = image.Width;
  }
}
    private void Form1_Load(object sender, EventArgs e)
    {

    }
    private void button1_Click(object sender, EventArgs e)
    {
        pictureBox1.Width += 10;
        pictureBox1.Height +=10;

    }

Answer 1

The simple way that works with what you're trying to achieve is by using the PictureBox's SizeMode property; set it to StretchImage.

PictureBox.SizeMode Property - MSDN

However, once you're more comfortable with GDI+ (and perhaps even unsafe contexts) you should look at doing this programatically yourself for greater flexibility.