子对象中参数值的查询顺序

问题描述

我有一个作为样本的对象（经过简化）

class Sample {
    List analysis;
}

分析包含一个值

class Analysis {
    Integer value;
}

该样本包含N个样本，但并非所有样本都具有值。在Querydsl中，我想按具有任何值的分析百分比对结果进行排序。

我已经尝试过了，但是看起来好像不是在计算值的数量。

query.orderBy(
    new OrderSpecifier(
        pRequest.getorder(),Expressions.asNumber(qSample.analysis.any().value.isNotNull().count().divide(qSample.analysis.size()) )
    )
);

解决方法

尝试：

public class ImageEventArgs : EventArgs
    {
            public Bitmap bmap { get; set; }
    }




 public Bitmap GetSet(object bmp)
        {
            Bitmap bmap = (Bitmap)bmp;
            Color theColor = new Color();

            for (int i = 0; i < bmap.Width; i++)
            {
                for (int j = 0; j < bmap.Height; j++)
                {
                    // Get the color of the pixel at (i,j)
                    theColor = bmap.GetPixel(i,j);

                    // Change the color at that pixel; DivideByZeroException out the green and blue
                    Color newColor = Color.FromArgb(theColor.R,theColor.G,0);

                    // Set the new color of the pixel
                    bmap.SetPixel(i,j,newColor);
                }
            }

            OnImageFinished(bmap);
            return bmap;
        }




 public Bitmap LockBits(object bmp)
        {
            Bitmap bmap = (Bitmap)bmp;

            // Use "unsafe" becausae c# doesnt support pointer arithmetic by default
            unsafe
            {
                // Lock the bitmap into system memory
                // "Pixelformat" can be "Fomat24bppRgb","Format32bppArgb",etc.
                BitmapData bitmapData =
                    bmap.LockBits(new Rectangle(0,bmap.Width,bmap.Height),ImageLockMode.ReadWrite,bmap.PixelFormat);

                //Define variables for bytes per pixel,as well as Image Width & Height
                int bytesPerPixel = System.Drawing.Bitmap.GetPixelFormatSize(bmap.PixelFormat) / 8;
                int heightInPixels = bitmapData.Height;
                int widthInBytes = bitmapData.Width * bytesPerPixel;

                //Define a pointer to the first pixel in the locked image
                // Scan0 gets or sets the address of the first pixel data in the bitmap
                // This can also be thought of as the first scan line in the bitmap.
                byte* PtrFirstPixel = (byte*)bitmapData.Scan0;

                // Step through each pixel in the image using pointers
                // Parallel.For executes a 'for' loop in which iterations
                // may run in parralel
                Parallel.For(0,heightInPixels,y =>
                {

                    // USe the 'Stride' (scanline width) proerty to step line by line thru the image
                    byte* currentLine = PtrFirstPixel + (y * bitmapData.Stride);
                    for (int x = 0; x < widthInBytes; x = x + bytesPerPixel)
                    {

                        // GET: each pixel color (R,G,& B)
                        int oldBlue = currentLine[x];
                        int oldGreen = currentLine[x + 1];
                        int oldRed = currentLine[x + 2];

                        // SET: Zero out the Blue,copy Green and Red unchanged
                        currentLine[x] = 0;
                        currentLine[x + 1] = (byte)oldGreen;
                        currentLine[x + 2] = (byte)oldRed;
                    }

                });

                bmap.UnlockBits(bitmapData);
            }
            OnImageFinished(bmap);
            return bmap;
        }