using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
public partial class MainForm : Form
{
private PictureBox pictureBox1;
public MainForm()
{
InitializeComponent();
// 初始化控件
pictureBox1 = new PictureBox
{
SizeMode = PictureBoxSizeMode.Zoom,
Dock = DockStyle.Fill
};
this.Controls.Add(pictureBox1);
// 示例：从文件读取二进制数据并显示
byte[] imageBytes = File.ReadAllBytes("test.jpg");
DisplayImage(imageBytes);
}
public void DisplayImage(byte[] imageBytes)
{
try
{
using (MemoryStream ms = new MemoryStream(imageBytes))
{
// 释放之前的图片资源（避免内存泄漏）
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
}
pictureBox1.Image = Image.FromStream(ms);
}
}
catch (Exception ex)
{
MessageBox.Show("图片加载失败: " + ex.Message);
}
}
}
从数据库读取：
// 假设从数据库字段获取 byte[]
byte[] imageBytes = (byte[])dataReader["ImageData"];
从网络下载：
using (WebClient client = new WebClient())
{
byte[] imageBytes = client.DownloadData("http://example.com/image.jpg");
}
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