C# 加載和傳遞圖片，導致內存溢出的問題

      由C#向C++裏面傳遞圖像的過程中，多加載幾次圖像後，內存會暴漲，主要有兩個原因：

一、pictureBox的清理不能用pictureBox.Image=null清除，而應該使用，pictureBox1.Image.Dispose()。

二、Bitmap實例化之後，需要釋放用dispose()空間。

        [DllImport("HoleDetect.dll", CallingConvention = CallingConvention.Cdecl)]
        public static extern void HoleDetect(IntPtr src, int height, int width,int Stride);
        private void treeView1_NodeMouseClick_1(object sender, TreeNodeMouseClickEventArgs e)
        {
            click_node = path_dir + "\\" + e.Node.Text;
            if(pictureBox1.Image!=null)pictureBox1.Image.Dispose();
            pictureBox1.Image = Image.FromFile(click_node);

            //獲取圖像的指針
            Bitmap srcBmp = new Bitmap(click_node);
            int height = srcBmp.Height;
            int width = srcBmp.Width;
            BitmapData bmdata = srcBmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite,
                srcBmp.PixelFormat);
            IntPtr ptr = bmdata.Scan0; //圖像指針
            HoleDetect(ptr, height, width, bmdata.Stride);
            srcBmp.UnlockBits(bmdata);
            srcBmp.Dispose();
        }if(pictureBox1.Image!=null)pictureBox1.Image.Dispose();
            pictureBox1.Image = Image.FromFile(click_node);

            //獲取圖像的指針
            Bitmap srcBmp = new Bitmap(click_node);
            int height = srcBmp.Height;
            int width = srcBmp.Width;
            BitmapData bmdata = srcBmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite,
                srcBmp.PixelFormat);
            IntPtr ptr = bmdata.Scan0; //圖像指針
            HoleDetect(ptr, height, width, bmdata.Stride);
            srcBmp.UnlockBits(bmdata);
            srcBmp.Dispose();
        }