如何解决此错误"GDI +中发生一般错误"? [英] How to Fix this Error "A generic error occurred in GDI+"?
问题描述
使用默认名称打开图像并保存为默认名称.(将其覆盖)
Open An Image from default name and save it by default name.(overwrit it)
我需要从Image("Default.jpg")制作图形并将其放在picturebox1.image上,并在picurebox1上绘制一些图形.(它起作用了,这不是我的问题)但是我无法保存picturebox1.Image覆盖在"Default.jpg"上(这是我的问题).如果更改保存名称,它可以工作,但是我需要覆盖它并多次打开. 谢谢
I need make graphics from Image("Default.jpg") that put it on picturebox1.image and draw some graphic on picurebox1.(it works and it is not my problem) But I can't save picturebox1.Image overwrite on "Default.jpg"(this is My problem).If I change the save name it work but I need to overwrite it and open it manytimes. Thank You
Boolean Play = false;
Pen P = new Pen(Color.Black, 2);
Graphics Temp;
int X1, X2, Y1, Y2;
Image Default_Image = new Bitmap("Default.jpg");
public Form1()
{
InitializeComponent();
Temp = pictureBox1.CreateGraphics();
}
private void PictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (Play)
{
X2 = e.X;
Y2 = e.Y; ;
Temp.DrawLine(P, X1, Y1, X2, Y2);
pictureBox1.Image.Save("Default.jpg");
Play = false;
}
else
{
Default_Image = new Bitmap("Default.jpg");
Temp = Graphics.FromImage(Default_Image);
pictureBox1.Image =Default_Image;
X1 = e.X;
Y1 = e.Y;
Play = true;
}
}
{"GDI +中发生一般错误."}
{"A generic error occurred in GDI+."}
推荐答案
要覆盖图像,您需要确保没有否连接. Closing
,Disposing
或Cloning
不够...
To overwrite an image you need to make sure no connections remain to it. Closing
, Disposing
or Cloning
are not quite enough...
以下是创建真正独立副本的功能:
Here is a function that creates a truly independent copy:
Bitmap GetClone(string imageName)
{
if (!File.Exists(imageName)) return null;
Bitmap bmp2 = null;
using (Bitmap bmp = (Bitmap)Bitmap.FromFile(imageName))
{
bmp2 = new Bitmap(bmp.Width, bmp.Height, bmp.PixelFormat);
bmp2.SetResolution(bmp.HorizontalResolution, bmp.VerticalResolution);
using (Graphics g = Graphics.FromImage(bmp2))
{
g.DrawImage(bmp, 0, 0);
}
}
return bmp2;
}
现在您可以执行以下操作:
Now you can do this:
string file = yourImageFileName;
Bitmap bmp = GetClone(file);
using (Graphics g = Graphics.FromImage(bmp))
{
// draw what you want..
g.DrawRectangle(Pens.Red, 11, 11, 199, 199);
}
bmp.Save(file, ImageFormat.Png); // use your own format etc..
您还应该注意不要泄漏旧版本的PictureBox.Image
.这是一个辅助函数:
You should also take care to not leak old PictureBox.Image
versions.. Here is a helper function:
void SetPBoxImage(PictureBox pbox, Bitmap bmp)
{
Bitmap dummy = (Bitmap)pbox.Image;
pbox.Image = null;
if (dummy != null) dummy.Dispose();
pbox.Image = bmp;
}
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