清除pictureBox1上显示的图形是否用this.pictureBox1.Image=null? ( 积分: 5 )

M

mycwcgr_new

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-04-20

• #1

清除pictureBox1上显示的图形是否用this.pictureBox1.Image=null?

清除pictureBox1上显示的图形是否用
this.pictureBox1.Image=null;

 

M

mycwcgr_new

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-04-20

• #2

清除pictureBox1上显示的图形是否用this.pictureBox1.Image=null?

清除pictureBox1上显示的图形是否用
this.pictureBox1.Image=null;

 

M

michael.ma

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-05-04

• #3

pictureBox1.Image=null;是可以的，而且内存也会清除。
但在delphi中内存不会释放。c＃中可能因为有内存垃圾清理器，所以内存不会增长吧。
另外可能用pictureBox1.Image.Dispose();更好一些

 

M

michael.ma

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-05-04

• #4

不用pictureBox1.Image=null也可以，下面测试结果，内存不会明显增长，
c＃会收集无用的内存
for (int i=0;i<1000;i++)
{
pictureBox1.Image=Image.FromFile(@"c:/2.bmp");
}

 

M

mycwcgr_new

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-05-06

• #5

pictureBox1.Image=Image.FromFile(@"c:/2.bmp");
pictureBox1.Image.Dispose();
File.Delete((@"c:/2.bmp");//这句将不会执行，因为文件的句柄没有马上释放，如何快速清除并释放资源？

 

M

michael.ma

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2005-05-06

• #6

FileStream fs = new FileStream("c://2.bmp",
FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
Image img = Image.FromStream(fs);
fs.Close();
pictureBox1.Image =img.Clone() as Image;
img.Dispose();
File.Delete("c://2.bmp");