winfrom-图片拆分成多块

- 日理万妓 2022-07-12 02:42 167阅读 0赞

先在panel容器（长宽为300）中绘制一个宫格，比如下面这样：

![SouthEast][]

private void Form1_Load(object sender, EventArgs e)
            {
                this.InitRandomPictureBox();
            }
            
            private void InitRandomPictureBox()
            {
                this.pnl_Random.Controls.Clear();
                for (int i = 0; i < this.ImgNumbers; i++)
                {
                    for (int j = 0; j < this.ImgNumbers; j++)
                    {
                        PictureBox pic = new PictureBox();
                        pic.Location = new Point(j * this.SideLength, i * this.SideLength);
                        pic.Size = new Size(this.SideLength, this.SideLength);
                        pic.Visible = true;
                        pic.BorderStyle = BorderStyle.FixedSingle;
    
                        this.pnl_Random.Controls.Add(pic);
                    }
                }
            }

/// <summary>
            /// 每个方向上要切割成的块数
            /// </summary>
            private int ImgNumbers
            {
                get
                {
                    return 3;
                }
            }
            /// <summary>
            /// 要切割成的正方形图片边长
            /// </summary>
            private int SideLength
            {
                get
                {
                    return 300 / this.ImgNumbers; //300：panel容器大小
                }
            }

//图片切割：

/// <summary>
            /// 将图片切割成小图片,图片顺序为先水平后垂直
            /// </summary>
            /// <param name="cx">水平方向多少个图片</param>
            ///<param name="cy">垂直方向多少个图片</param>
            public static Image[] SplitToSmallImages(this Image fromImage, int cx, int cy)
            {
                Image[] imgs = new Image[cx * cy];
    
                int nWidth = fromImage.Width / cx;
                int nHeight = fromImage.Height / cy;
    
                Bitmap image = new Bitmap(nWidth, nHeight);
                Graphics graphics = Graphics.FromImage(image);
    
                for (int i = 0; i < cy; i++)
                {
                    for (int j = 0; j < cx; j++)
                    {
                        graphics.DrawImage(fromImage, 0, 0, new Rectangle(j * nWidth, i * nHeight, nWidth, nHeight), GraphicsUnit.Pixel);
                        Image img = Image.FromHbitmap(image.GetHbitmap());
                        int idx = j + i * cx;
                        img.Tag = idx;
                        imgs[idx] = img;
                    }
                }
    
                return imgs;
            }

将切好的图片随机排序然后放入到容器中：

var tmp = this._splitImages.OrderBy(p => Guid.NewGuid()).ToList();
                for (int i = 0; i < tmp.Count; i++)
                {
                    this._splitPictureBoxes[i].Image = tmp[i];
                }

![SouthEast 1][]

[SouthEast]: /images/20220711/c5f43480f35f489681c888d2230cf5bb.png
[SouthEast 1]: /images/20220711/deaef83957514f45947d8d51625a154c.png