Question

我已经设计了一堆mdichild表单，并希望将表单显示为mdichild。我将主窗体设置为mdi，我能够正确地将其中一个窗体显示为mdichild。给我一个麻烦的代码是：

    public partial class KeyboardSettingsForm : Form
    {
        private mainForm _mForm;

        public KeyboardSettingsForm()
        {
            InitializeComponent();
            _mForm = new mainForm(); //<---mdiparent
            this.MdiParent = _mForm; //<---Commenting out this line shows the form

            this.Shown += new System.EventHandler(this.KeyboardSettingsForm_Shown);

        }
    }

我不确定为什么如果我发表评论：this.MdiParent = _mForm;表格会显示（但不是作为mdichild）。保持代码完整，表单拒绝显示。如何将该表单显示为mdichild？

更新了工作代码

public partial class mainForm : Form
{
    private NavigationForm _navForm;
    public mainForm()
    {
        InitializeComponent();


        this.Shown += new System.EventHandler(this.mainForm_Shown);

    }

    private void mainForm_Shown(object sender, EventArgs e)
    {
        _navForm = new NavigationForm(this);
        _navForm.MdiParent = this;
        _navForm.Show();
    }

    private void mainForm_Load(object sender, EventArgs e)
    {

    }

}

public partial class NavigationForm : Form
{

    private KeyboardSettingsForm _wKeyboard;

    public NavigationForm(Form frm)
    {
        InitializeComponent();

        _wKeyboard = new KeyboardSettingsForm(frm);


    }

    private void NavigationForm_Load(object sender, EventArgs e)
    {

    }

    private void keyboardPictureBox_Click(object sender, EventArgs e)
    {
        _wKeyboard.Show();

    }

}

public partial class KeyboardSettingsForm : Form
{
    private Form _mdiParent;

    public KeyboardSettingsForm(Form frm)
    {
        InitializeComponent();
        _mdiParent = frm;
        this.MdiParent = frm;

        this.Shown += new System.EventHandler(this.KeyboardSettingsForm_Shown);

    }

    private void KeyboardSettingsForm_Load(object sender, EventArgs e)
    {
        MessageBox.Show(_mdiParent.Name);
    }

    private void KeyboardSettingsForm_Shown(object sender, EventArgs e)
    {

    }
}

Answer 1

您需要将mForm设为mdi容器：

mForm.IsMdiContainer = true;

Answer 2

您需要明确显示主表单，如下所示：

_mForm = new mainForm();
this.MdiParent = _mForm;

this.Shown += this.KeyboardSettingsForm_Shown;

_mForm.Show(); // show mdi-parent explicitly because only the application's start-up form shows automatically.

Answer 3

你说的是KeyboardSettingsForm的父母是谁，但你在哪里展示父母？

_mForm = new mainForm(); //<---mdiparent not shown :(
this.MdiParent = _mForm;

试试这个

_mForm = new mainForm();
_mForm.Show();//show your parent first
this.MdiParent = _mForm;

但即使是上面的代码也只是没有意义。你的意思是做这样的事吗？

public partial class KeyboardSettingsForm : Form
{
    private mainForm _mForm;

    public KeyboardSettingsForm(mainForm mForm)
    {
        InitializeComponent();
        this._mForm = mForm;//Did you mean this?
        this.MdiParent = _mForm;

        this.Shown += new System.EventHandler(this.KeyboardSettingsForm_Shown);

    }
}

mdichild表格没有显示

3 个答案: