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花了我一上午的时间，找来找去找不到答案，又是急性子，只好自己动手了，见笑，也请大家多提意见，谢了。
parent.cs
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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace testagain
{
/// <summary>
/// Summary description for parent.
/// </summary>
public class parent : System.Windows.Forms.Form
{
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem m_FileMenu;
private System.Windows.Forms.MenuItem m_OpenFile;
private System.Windows.Forms.MenuItem m_Close;
private System.Windows.Forms.MdiClient mdiClient1;
private System.Windows.Forms.MenuItem menuItem1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public parent()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
testform f_test = new testform(this);
f_test.Show();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
public static void Main()
{
Application.Run(new parent());
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.m_FileMenu = new System.Windows.Forms.MenuItem();
this.m_OpenFile = new System.Windows.Forms.MenuItem();
this.m_Close = new System.Windows.Forms.MenuItem();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.mdiClient1 = new System.Windows.Forms.MdiClient();
this.SuspendLayout();
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.m_FileMenu,
this.menuItem1});
//
// m_FileMenu
//
this.m_FileMenu.Index = 0;
this.m_FileMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.m_OpenFile,
this.m_Close});
this.m_FileMenu.Text = "文件(&F)";
//
// m_OpenFile
//
this.m_OpenFile.Index = 0;
this.m_OpenFile.Shortcut = System.Windows.Forms.Shortcut.CtrlO;
this.m_OpenFile.Text = "Dns探测";
this.m_OpenFile.Click += new System.EventHandler(this.m_OpenFile_Click);
//
// m_Close
//
this.m_Close.Index = 1;
this.m_Close.Shortcut = System.Windows.Forms.Shortcut.CtrlX;
this.m_Close.Text = "关闭";
this.m_Close.Click += new System.EventHandler(this.m_Close_Click);
//
// menuItem1
//
this.menuItem1.Index = 1;
this.menuItem1.Text = "关于...(&A)";
this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click);
//
// mdiClient1
//
this.mdiClient1.Dock = System.Windows.Forms.DockStyle.Fill;
this.mdiClient1.Name = "mdiClient1";
this.mdiClient1.TabIndex = 0;
//
// parent
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(536, 309);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.mdiClient1});
this.IsMdiContainer = true;
this.Menu = this.mainMenu1;
this.Name = "parent";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "MDI窗体操作演示_父窗体";
this.ResumeLayout(false);
}
#endregion
private void menuItem1_Click(object sender, System.EventArgs e)
{
Form f_activeform = this.ActiveMdiChild;
if (f_activeform != null)
{
if (f_activeform.Name != null && f_activeform.Name != "parent")
{
f_activeform.Close();
}
}
child child_form = new child(this);
child_form.Show();
}
private void m_Close_Click(object sender, System.EventArgs e)
{
this.Close();
}
private void m_OpenFile_Click(object sender, System.EventArgs e)
{
Form f_activeform = this.ActiveMdiChild;
if (f_activeform != null)
{
if (f_activeform.Name != null && f_activeform.Name != "parent")
{
f_activeform.Close();
}
}
testform f_test = new testform(this);
f_test.Show();
}
}
}
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