C#将大量图像加载到picturebox，但占用了太多内存

Question

这是我将100个图像从MySQL数据库加载到Panel的代码，并且每个图像大约为28KB。但是资源监视器显示它占用超过2GB的内存，有时会导致CCD_ 2。

for (int x = 0; x < Topic4Number; x++)
{
ReaderKeyword.Read();
pbTopic4[x] = new PictureBox();
if (x == 0)
{
pbTopic4[x].Location = new Point(45, 75);
}
else
{
if (pbTopic4[x - 1].Right < 1300)
{
pbTopic4[x].Location = new Point(pbTopic4[x - 1].Right + 35, pbTopic4[x - 1].Top);
}
else
{
pbTopic4[x].Location = new Point(45, pbTopic4[x - 1].Top + 445);
}
}
pbTopic4[x].Size = new Size(Topic4pb_width, Topic4pb_height);
pbTopic4[x].SizeMode = PictureBoxSizeMode.Zoom;

if (ReaderKeyword.HasRows)
{
long len = ReaderKeyword.GetBytes(0, 0, null, 0, 0);                           
byte[] buffer = new byte[len];
len = ReaderKeyword.GetBytes(0, 0, buffer, 0, (int)len);
MemoryStream ms = new MemoryStream(buffer);
Bitmap img = new Bitmap(ms);                            
pbTopic4[x].Image = img;                           
}
}
PanelAll.Controls.AddRange(pbTopic4);

当我不需要PictureBox时，我确实使用了.Dispose()来释放内存。

if (pbTopic4 != null)
{
for (int x = 0; x < Topic4Number; x++)
{
pbTopic4[x].Dispose();
pbTopic4[x] = null;
GC.Collect();
}
}

以下是我的问题：

1. 有什么方法可以减少使用的内存吗
2. 有什么方法可以改进我的代码，使其更快地工作吗
3. 为什么显示PictureBox需要那么多内存

Answer 1

我对创建图像缩略图做了一些修改，程序运行速度更快，占用的内存更少。

public bool ThumbnailCallback()
{
return false;
}

if (ReaderTopic4.HasRows)
{
long len = ReaderTopic4.GetBytes(0, 0, null, 0, 0);
byte[] buffer = null;
buffer = new byte[len];
len = ReaderTopic4.GetBytes(0, 0, buffer, 0, (int)len);
MemoryStream ms = new MemoryStream(buffer);
Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);
Bitmap img = new Bitmap(ms);
Image myThumbnail = img.GetThumbnailImage(353, 250, myCallback, IntPtr.Zero);
pbTopic4[x].Image = myThumbnail;
}

参考：https://learn.microsoft.com/zh-tw/dotnet/api/system.drawing.image.getthumbnailimage?view=dotnet-plat-ext-6.0