Kindeditor小改动

    private void GetSmallImg(string originalImagePath)
    {
        try
        {
            System.Drawing.Image imgOriginal = System.Drawing.Image.FromFile(originalImagePath);
            //获取原图片的的宽度与高度
            int originalWidth = imgOriginal.Width;
            int originalHeight = imgOriginal.Height;

            //定义缩略图片宽度和高度  
            int thumbnailWidth, thumbnailHeight;

            //如果原图片的宽度与高度都小于缩略图片最小尺寸
            if (originalWidth < SetWidth && originalHeight < SetHeight)
            {
                thumbnailWidth = SetWidth;  //宽度等于最小宽度
                thumbnailHeight = SetWidth;//高度等于最小高度
            }
            //如果原图片宽度大于原图片的高度              
            else if (originalWidth < originalHeight)
            {
                thumbnailWidth = SetWidth;  //宽度等于缩略图片尺寸
                thumbnailHeight = originalHeight * SetWidth / originalWidth;  //高度做相应比例缩小
            }
            //如果原图片高度大于原图片的宽度
            else
            {
                thumbnailWidth = originalWidth * SetHeight / originalHeight; //宽度做相应比例缩小
                thumbnailHeight = SetHeight; //高度等于缩略图片尺寸
            }

            System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(thumbnailWidth, thumbnailHeight);
            System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(bitmap);

            //设置缩略图片质量
            graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

            graphics.DrawImage(imgOriginal, 0, 0, thumbnailWidth, thumbnailHeight);
            imgOriginal.Dispose();
            // 保存缩略图片
            File.Delete(originalImagePath);
            bitmap.Save(originalImagePath);
            bitmap.Dispose();
        }
        catch (Exception e)
        {
            showError(e.Message);
        }
    }