c# - Can rectangle be split in rows and columns? -

          private void panel1_paint(object sender, painteventargs e)     {         pen mypen = default(pen);         mypen = new pen(system.drawing.color.red, 3);         mypen.dashstyle = system.drawing.drawing2d.dashstyle.dash;         //for dash line in rectangle          pen mypen1 = default(pen);         mypen1 = new pen(system.drawing.color.blue, 1);         mypen1.dashstyle![enter image description here][2] = system.drawing.drawing2d.dashstyle.dash;          //pen mypen2 =default(pen);         //mypen2 = new pen(system.drawing.color.yellow, 3);         //mypen2.dashstyle = system.drawing.drawing2d.dashstyle.dash;          //pen mypen3 = default(pen);         //mypen3 = new pen(system.drawing.color.violet, 1);         //mypen3.dashstyle = system.drawing.drawing2d.dashstyle.dash;          l1 = rect1lt.x + 5;         t1 = rect1lt.y + 5;         w1 = rect1rb.x - rect1lt.x;         h1 = rect1rb.y - rect1lt.y;           e.graphics.drawrectangle(mypen, new system.drawing.rectangle(l1, t1, w1, h1));         e.graphics.drawrectangle(mypen1, new system.drawing.rectangle(l1, t1, w1, h1));          e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1lt.x, rect1lt.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1rt.x, rect1rt.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1lb.x, rect1lb.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1rb.x, rect1rb.y, 10, 10));          e.graphics.fillrectangle(brushes.blue, rect1lt);         e.graphics.fillrectangle(brushes.blue, rect1rt);         e.graphics.fillrectangle(brushes.blue, rect1lb);         e.graphics.fillrectangle(brushes.blue, rect1rb);          e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1t.x, rect1t.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1r.x, rect1r.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1b.x, rect1b.y, 10, 10));         e.graphics.drawrectangle(pens.blue, new system.drawing.rectangle(rect1l.x, rect1l.y, 10, 10));          e.graphics.fillrectangle(brushes.blue, rect1t);         e.graphics.fillrectangle(brushes.blue, rect1r);         e.graphics.fillrectangle(brushes.blue, rect1b);         e.graphics.fillrectangle(brushes.blue, rect1l);          datagridview dg1 = new datagridview();           //while (!exit)         //{         //    var time = gettime();         //    update(time);         //    render(time);         //}       } 

i want divide rectangle in rows , columns , size of rows , column can changeable @ runtime? , no of rows , columns can changeable? don't want split whole rectangle want divide them in rectangle.

here simplfied example:

int cols = 7; int rows = 11;  private void panel1_paint(object sender, painteventargs e) {     rectangle rect = // rectangle!      rectangle prect = rect;  // panel2.clientrectangle;     float width = 1f * prect.width / cols;     float height = 1f * prect.height / rows;      using (pen pen = new pen(system.drawing.color.blue, 1))     {       pen.dashstyle = system.drawing.drawing2d.dashstyle.dash;        (int c = 0; c < cols; c++)          (int r = 0; r < rows; r++)          {             rectanglef rect = new rectanglef(prect.x + c * width, prect.y + r * height,                                               width, height);             e.graphics.fillrectangle(brushes.coral, rect);             // e.graphics.drawrectangle(pen, rect.x, rect.y, rect.width, rect.height);          }          (int c = 0; c < cols; c++) e.graphics.drawline(pen,               prect.x + c * width, prect.y, prect.x + c * width, prect.y + prect.height);         (int r = 0; r < rows; r++) e.graphics.drawline(pen,               prect.x, prect.y + r * height, prect.x + prect.width, prect.y + r * height);         e.graphics.drawrectangle(pens.red,                                   prect.x, prect.y, prect.width - 1, prect.height - 1);      } } 

note few changes:

• the border color , fill color must not same.
• the fill must come first or overwrite border
• i work floats fill panel completely; if cols , rows don't divide panel/rectangle size evenly, recangles not have same sizes ..

• at first have ignored dashstyle. if want have dashstyle must change plan! reason if draw rectangles in grid you..

  • ..either have them overlapping , dashes in each others way. there dashoffset parameter don't think can twisted make work on grid.

  • ..or need draw rectangles inside grid cells twice thick , patterns still disturb each other.

instead draw few lines shown!

here example dashes: