GDI+ 中出现一般性错误 - 将位图保存到桌面

A generic error occured in GDI+ - saving bitmap to desktop

我创建了一个分形绘图程序,并尝试在其中加入一个按钮来保存当前位图。我使用 mandelbrot() 方法,但按钮和代码似乎不起作用,它只是抛出错误。这是绘制和保存位图的代码:

我以为是文件夹权限的问题,所以加了代码保存到当前用户的桌面。但是还是一样的错误。

绘制位图

        private Bitmap picture;
        private Graphics g1;

private void Form1_Paint(object sender, PaintEventArgs e)
        {
            //put the bitmap on the window
            Graphics windowG = e.Graphics;
            windowG.DrawImageUnscaled(picture, 0, 0);
        }

保存位图

private void savefractal_Click(object sender, EventArgs e)
        {
            try
            {              
               string path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
               picture.Save(path);
               savefractal.Text = "Saved file.";

            }
            catch (Exception)
            {
                MessageBox.Show("There was a problem saving the file." +
                    " Check the file permissions.");
            }
        }
string path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
picture.Save(path)

这不是文件名,您传递的是目录路径,这是行不通的。

使用Path.Combine:

String fileName = Path.Combine( Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "MyBitmap.bmp" );
picture.Save( fileName );