窗体Forms

常用属性

设置成父窗体IsMdiContainer设置为true

关闭子窗体

通常一个父窗体会打开一个子窗体，子窗体会有确认和取消按钮。其实子窗体也是一个Form。如何来控制呢？
父窗体

private void button1_Click(object sender, EventArgs e)
{
    Form2 Form2 = new Form2();
    //打开子窗体  线程会停到这。
    DialogResult r = Form2.ShowDialog();
    //获取到子窗体是点击和确定还是取消
    MessageBox.Show(r.ToString());
}

子窗体的两个按钮

private void button5_Click(object sender, EventArgs e)
{
    this.DialogResult = DialogResult.OK;
    MessageBox.Show(this.DialogResult.ToString());
}
private void button6_Click(object sender, EventArgs e)
{
    this.DialogResult = DialogResult.Cancel;
    MessageBox.Show(this.DialogResult.ToString());
}

常用事件

窗体加载完成之后的函数

双击窗体进入

常用搭档

菜单栏

实战场景

设计一个Mdi窗口

 private void 创建子窗体ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     Form frm2 = new Form();
     frm2.MdiParent = this;
     frm2.Show();
     Form frm3 = new Form();
     frm3.MdiParent = this;
     frm3.Show();
     Form frm4 = new Form();
     frm4.MdiParent = this;
     frm4.Show();
 }
private void 横向排列ToolStripMenuItem_Click(object sender, EventArgs e)
{
    LayoutMdi(MdiLayout.TileHorizontal);
}
private void 纵向排列ToolStripMenuItem_Click(object sender, EventArgs e)
{
    LayoutMdi(MdiLayout.TileVertical);
}