DrawRectangle 超出表单边界

Question

private void Form1_Paint(object sender, PaintEventArgs e)
    {
        g = e.Graphics;
        blockList.DrawBlocksInList(g);  //Drawing the blocks that were added to the list in the Form1_Load below;
        g.FillRectangle(MainBlock._Pen.Brush, MainBlock._Rectangle);  //Drawing the Main Block;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        float rectSize = this.Width / 10.0f;    //What the size of each rectangle should be, depending on the form's size;
        Block BlockForList; //No need to initialize it;
        for (float y = 0; y < this.Height; y += rectSize)   //500 is the size of the Form, 50 is the size of the X & Y of each rectangle;
            for (float x = 0; x < this.Width; x += rectSize)
            {
                BlockForList = new Block(pen, new RectangleF(x, y, rectSize, rectSize)); //Initializing the block each time to set different locations;
                blockList.list.Add(BlockForList);   //Adding the blocks to the list to draw them all;
            }
    }

之后我使用一种方法绘制了 blockList.list 中的所有块，但是发生了这种情况： http://imgur.com/5h7ZMTH

Answer 1

当然，它会越界 - 你已经告诉它允许每个块的左边缘上升到 Width，而右边缘上升到 Height .

你想要这个吗？

    for (float y = 0; y < this.Height-rectSize; y += rectSize)   //500 is the size of the Form (this.Width & this.Height), 50 (rectSize) is the size of the X & Y of each rectangle (basically squares);
        for (float x = 0; x < this.Width-rectSize; x += rectSize)

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编辑

ah - 同样在绘画中你首先需要调用 base OnPaint() 方法。这将填充背景。

DrawRectangle 超出表单边界

DrawRectangle goes out of form bounds

c#

graphics

rectangles

编辑