如何创建一个文本框或richtextbox，它的每一行都有一个行？ [英] how to create a textbox or richtextbox and it every row has a rowline?

问题描述

如何创建一个文本框或richtextbox，每一行都有一条行？

就像单词的网格线一样，每一行都可以显示或隐藏所有行。

rowline！你能帮助我吗？

how to create a textbox or richtextbox and it every row has a rowline?
like word''s gridlines,in every row.you can show it or hide all lines.
rowline!can you help me?

推荐答案

这样，但我没有得到rowhight。

like this,but I dont get rowhight.

class rowlineTextbox : TextBox
    {
          const int WM_PAINT = 0xF;
        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);
            if (m.Msg == WM_PAINT||m.Msg == 0x133) 
             {
                  aaa();
            }
            
        }
         private void aaa()
        {
            using (Graphics g = Graphics.FromHwnd(base.Handle))
            {
                Pen tPen;
                Size CSize = this.ClientSize;
                int cordX1 = this.Location.X + this.Padding.Left;
                int cordX2 = CSize.Width - this.Padding.Right;
                int cordY1 = this.Location.Y + this.Padding.Top;
                int cordY2 = cordY1;

                tPen = new Pen(Color.Black, 1.0F);
                g.DrawLine(tPen, cordX1, cordY1, cordX2, cordY2);

                for (int i = cordY1; i <= CSize.Height; i += this.Font.Height)
                {
                    g.DrawLine(tPen, cordX1, i, cordX2, i);
                }
            }

        }
    }

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