为什么在pictureBox中播放图像时出现内存不足异常
本文关键字:内存不足 异常 图像 pictureBox 播放 为什么 | 更新日期: 2023-09-27 18:00:20
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace Player_Manager
{
public partial class ScreenShotsPlayer : Form
{
FileInfo[] images;
DirectoryInfo di1;
int current = 0;
public ScreenShotsPlayer()
{
InitializeComponent();
di1 = new DirectoryInfo(@"e:'screenshots");
images = di1.GetFiles("*.bmp");
}
private void button1_Click(object sender, EventArgs e)
{
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
current = (current >= images.Length - 1) ? 0 : ++current;
pictureBox1.Image = new Bitmap(images[current].FullName);
pictureBox1.Refresh();
}
}
}
硬盘上有1200个图像,计时器设置为100ms。在播放了大约258-270张图像后,它在线路上抛出了内存不足的异常:
pictureBox1.Refresh();
System.OutOfMemoryException was unhandled
HResult=-2147024882
Message=Out of memory.
Source=System.Drawing
StackTrace:
at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
at System.Drawing.Graphics.DrawImage(Image image, Int32 x, Int32 y, Int32 width, Int32 height)
at System.Drawing.Graphics.DrawImage(Image image, Rectangle rect)
at System.Windows.Forms.PictureBox.OnPaint(PaintEventArgs pe)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:
如果我要删除行pictureBox1.Refresh((;然后它将抛出异常:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Player_Manager
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
在线Application.Run(new Form1(((;
同样的例外。
GDI+的问题是它使用的内存没有得到管理——GC不知道你在触发一个集合时浪费了多少,所以它只是不断地堆积,直到GDI+用完可分配的内存。
修复非常琐碎。你知道你正在分配的位图,只需在不再需要时处理它们:
private void timer1_Tick(object sender, EventArgs e)
{
if(pictureBox1.Image!=null)
{
var img = pictureBox1.Image; // cache it to dispose
pictureBox1.Image = null; // don't dispose an used object
img.Dispose(); // and dispose of it
}
current = (current >= images.Length - 1) ? 0 : ++current;
pictureBox1.Image = new Bitmap(images[current].FullName);
pictureBox1.Refresh();
}