[英]MDI form in C# Parent And Child
首先,確保Form1的IsMdiContainer
設置為true
。
然后實例化Form1和Form2,將Form1設置為Form2的MdiParent:
// Form1.IsMdiContainer should be true
Form1 form1 = new Form1();
// This automatically adds form2 into form1's MdiChildren collection
Form2 form2 = new Form2();
form2.MdiParent = form1;
在Form2的代碼中,具有類似以下內容的內容,以處理按鈕的click事件以實例化Form3。
public class Form2 : Form {
// Include as data member so we only instantiate one Form3
Form3 _form3;
public Form2() {
InitializeComponent();
Button1.Click += new EventHandler(Button1_Click);
}
private void Button1_Click(object sender, EventArgs e) {
if(_form3 == null) {
_form3 = new Form3();
// Set Form3's parent to be Form1
_form3.MdiParent = this.MdiParent;
}
}
}
幾點注意,這段代碼確實快速又骯臟。 關於它,有一些不良的事情,例如Form2和Form3的耦合(以及無用的類名Form1,Form2和Form3)。 理想情況下,您可以通過引發Form2可以掛接到並實例化Form3的事件來使Form2和Form3脫鈎。 此示例代碼旨在為您提供指導。
只需告訴表單其MdiParent是當前表單即可。
form2 frm = new form2 ();
frm.MdiParent = this;
frm.Show();
private void homeToolStripMenuItem_Click(object sender, EventArgs e)
{
frmHome objfrmHome = frmHome.GetChildInstance();
objfrmHome.MdiParent = this;
objfrmHome.WindowState = FormWindowState.Maximized;
objfrmHome.Show();
objfrmHome.BringToFront();
}
然后在表格中調用
private static frmHome m_SChildform;
public static frmHome GetChildInstance()
{
if (m_SChildform == null) //if not created yet, Create an instance
m_SChildform = new frmHome();
return m_SChildform; //just created or created earlier.Return it
}
試試這個功能
public void mdiChild(Form mdiParent, Form mdiChild)
{
foreach (Form frm in mdiParent.MdiChildren)
{
if (frm.Name == mdiChild.Name)
{
frm.Focus();
return;
}
}
mdiChild.MdiParent = mdiParent;
mdiChild.Show();
}
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