2020-03-11 每日一例第3天
1.设置父窗体属性；IsMdicontainer设置成true;
2.拖入menustrip控件，修改标题栏中的text文字。
3.点击“加载子窗体”设置代码：
Form frm1 = new Form();
frm1.MdiParent = this;
frm1.Show();
frm1.Text = "窗体1";
Form frm2 = new Form();
frm2.MdiParent = this;
frm2.Show();
frm2.Text = "窗体2";
4.点击“水平平铺”设置代码：
LayoutMdi(MdiLayout.TileHorizontal);
5.点击“垂直平铺”设置代码：
LayoutMdi(MdiLayout.TileVertical);
6.例题完成，最后效果如下：
7.完整代码如下：
private void 加载子窗体ToolStripMenuItem_Click(object sender, EventArgs e)
{
Form frm1 = new Form();
frm1.MdiParent = this;
frm1.Show();
frm1.Text = "窗体1";
Form frm2 = new Form();
frm2.MdiParent = this;
frm2.Show();
frm2.Text = "窗体2";
}
private void 水平平铺ToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.TileHorizontal);
}
private void 垂直平铺ToolStripMenuItem_Click(object sender, EventArgs e)
{
LayoutMdi(MdiLayout.TileVertical);
}