在web页面上我们可以通过frameset,iframe嵌套框架很容易实现各种导航+内容的布局界面,而在winform、WPF中实现其实也很容易,我这里就分享一个:在winform下实现左右布局多窗口界面。
我这里说的多窗口是指一个父窗口包含多个子窗口,在winform中实现这种效果很简单,即将某个窗口的IsMdiContainer设为true,然后将其它子窗口的MdiParent设为其父窗口对象即可,这样就完成了一个多窗口界面,效果如下:
点击NEW新打开一个窗口,其效果如下:
请看我上图红色标注的地方,windows菜单项下面显示的是当前所有已打开的子窗口,点击某个菜单,即可快速切换到其它窗口,若关闭某个子窗口,与之相对应的菜单项也会自动被移除,实现这个功能也很简单,只需要将菜单的MdiWindowListItem属性设为需要显示活动窗口列表的菜单项即可,如:this.menuStrip1.MdiWindowListItem = this.windowsToolStripMenuItem;
上述示例完整的实现代码如下:
public partial class FormMdi : Form{private int formCount = 0;public FormMdi(){InitializeComponent();this.menuStrip1.MdiWindowListItem = this.windowsToolStripMenuItem;}private voID newToolStripMenuItem_Click(object sender,EventArgs e){ShowChildForm<FormChild>();}private voID ShowChildForm<TForm>() where TForm : Form,new(){TForm childForm = new TForm();childForm.name = "frm" + GuID.NewGuID().ToString("N");childForm.Text = string.Format("Child Form -{0}",++formCount);childForm.MdiParent = this;childForm.windowstate = Formwindowstate.Maximized;childForm.Show();}}
相信实现上面这部份功能一般用过winform的人都会 *** 作,我这里就当是复习顺便给新手一个参考,同时也为下面要实现的左右布局功能做一个铺垫吧。
要实现左右布局,并且能够支持可动态调整左右占比的功能,非SplitContainer控件莫属了,如果不了解该控件用法请自行在网上查找相关资料,我这里就不作说明,如果要显示windows已打开的子窗口情况,同样也需要用到MenuStrip控件,
最终设计的主窗口(FormMain)效果如下:
我这里因为只是演示,所以菜单控件上我只添加了两个菜单项,分别为:windows,用于显示windows已打开的子窗口列表,NEW,用于打开一个子窗口;SplitContainer控件全部采用默认的,没有放置任何控件在其中,如果用在正式系统中,一般左边Panel1中会放置一个树形菜单,右边Panel2中保持空即可,因为这个是用来作为子窗口的容器。
控件层次结构如下图示:
界面设计好了,下面就实现最重要的两个功能。
第一个功能:在右边Panel2中显示子窗口,实现代码如下:
public FormMain(){this.IsMdiContainer = true;}private voID ShowChildForm<TForm>() where TForm : Form,++formCount);childForm.MdiParent = this;childForm.Parent = splitContainer1.Panel2;childForm.windowstate = Formwindowstate.Maximized;childForm.Show();}
简要说明:
1.在窗口构造函数中动态的将IsMdiContainer设为true,当然也可以设计视图中设置;
2.编写一个显示写子窗口的方法,方法中需注意的地方:childForm.MdiParent = this;childForm.Parent = splitContainer1.Panel2,意思是:将当前窗口作为子窗口的父窗口,同时将Panel2指定为子窗口的父对象,这样就能实现子窗口在Panel2中打开了。
第二个功能:在windows菜单项下显示已打开的子窗口列表,这里实现就没有像文章一开始介绍的那样简单,使用那个方法是无效的,需要我们来自行实现,稍微有点复杂,但如果明白其实现原理,也就简单明白了。
实现思路:当childForm加载到Panel2时,会触发Panel2.ControlAdded事件,当childForm被关闭时,会触发Panel2.ControlRemoved事件,我们可以统一订阅这两个事件,当childForm加载时,那么就在windows菜单项下增加一个菜单项,反之则移除该菜单项,实现代码如下:
this.splitContainer1.Panel2.ControlAdded += Panel2_ControlChanged;this.splitContainer1.Panel2.ControlRemoved += Panel2_ControlChanged;voID Panel2_ControlChanged(object sender,ControlEventArgs e){var frm = e.Control as Form;string menuname = "menu_" + frm.name;bool exists = this.splitContainer1.Panel2.Controls.Contains(frm);if (exists){var menuItem = GetMenuItem(menuname);if (menuItem != null){menuItem.Checked = true;frm.BringToFront();frm.Focus();}else{windowsToolStripMenuItem.DropDownItems.Add(new ToolStripMenuItem() { Text = frm.Text,name = menuname,Tag = frm,Checked = true });}}else{var menuItem = GetMenuItem(menuname);if (menuItem != null){windowsToolStripMenuItem.DropDownItems.Remove(menuItem);menuItem.dispose();}}}private ToolStripMenuItem GetMenuItem(string menuname){var menuItems = windowsToolStripMenuItem.DropDownItems.Cast<ToolStripMenuItem>();menuItems.ToList().ForEach(m => m.Checked = false);return menuItems.Where(m => m.name == menuname).SingleOrDefault();}
同时为了实现点击windows菜单项的子菜单能够快速切换子窗口,需要订阅windows菜单项的DropDownItemClicked事件,当然也可以为新增的子菜单项订阅Click事件,实现代码如下:
windowsToolStripMenuItem.DropDownItemClicked += windowsToolStripMenuItem_DropDownItemClicked;voID windowsToolStripMenuItem_DropDownItemClicked(object sender,ToolStripItemClickedEventArgs e){var menuItem = GetMenuItem(e.ClickedItem.name);menuItem.Checked = true;var childForm = menuItem.Tag as Form;childForm.BringToFront();childForm.Focus();}private voID CheckwindowsMenuItem(string menuname){var menuItem = GetMenuItem(menuname);if (menuItem != null){menuItem.Checked = true;}}
这样就基本实现了在windows菜单项下显示已打开的子窗口列表,并点击指定的菜单项能够切换当前活动的子窗口,但仍有一个不足的地方,那就是,当直接点击子窗口来切换当前活动窗口时(说白了就是当点击某个子窗口标题栏,该窗口就显示在其它所有的子窗口最前面),windows菜单项下的子菜单勾选项没有同步更新,一开始想到的是用Activated事件来进行处理,结果经测试发现有效,该Activated事件在点击子窗口标题栏时并不会被触发,所以只能换种方法,经过多次测试,发现当窗口从后面切换到前面时(称为Z顺序改变),子窗口就会发生重绘,从而触发Paint方法,我们可以订阅该事件,并进行处理,实现代码如下:
private string currentChildFormname = null; //记录当前活动子窗口名称childForm.Paint += (s,e) => { var frm=s as Form;if (!frm.name.Equals(currentChildFormname) && this.splitContainer1.Panel2.Controls[0].Equals(frm)) //当容器中第一个控件就是当前的窗口,则表明该窗口处于所有窗口之上{CheckwindowsMenuItem("menu_" + frm.name);currentChildFormname = frm.name;}};
最后贴出完整的实现代码:
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.linq;using System.Text;using System.Threading.Tasks;using System.windows.Forms;namespace windowsFormsApplication1{public partial class FormMain : Form{private int formCount = 0;private string currentChildFormname = null;public FormMain(){InitializeComponent();this.IsMdiContainer = true;this.splitContainer1.Panel2.ControlAdded += Panel2_ControlChanged;this.splitContainer1.Panel2.ControlRemoved += Panel2_ControlChanged;windowsToolStripMenuItem.DropDownItemClicked += windowsToolStripMenuItem_DropDownItemClicked;}voID windowsToolStripMenuItem_DropDownItemClicked(object sender,ToolStripItemClickedEventArgs e){var menuItem = GetMenuItem(e.ClickedItem.name);menuItem.Checked = true;var childForm = menuItem.Tag as Form;childForm.BringToFront();childForm.Focus();}private voID FormMain_Load(object sender,++formCount);childForm.MdiParent = this;childForm.Parent = splitContainer1.Panel2;childForm.windowstate = Formwindowstate.Maximized;childForm.Paint += (s,e) => { var frm=s as Form;if (!frm.name.Equals(currentChildFormname) && this.splitContainer1.Panel2.Controls[0].Equals(frm)) //当容器中第一个控件就是当前的窗口,则表明该窗口处于所有窗口之上{CheckwindowsMenuItem("menu_" + frm.name);currentChildFormname = frm.name;}};childForm.Show();}private voID CheckwindowsMenuItem(string menuname){var menuItem = GetMenuItem(menuname);if (menuItem != null){menuItem.Checked = true;}}voID Panel2_ControlChanged(object sender,Checked = true });}}else{var menuItem = GetMenuItem(menuname);if (menuItem != null){windowsToolStripMenuItem.DropDownItems.Remove(menuItem);menuItem.dispose();}}}private ToolStripMenuItem GetMenuItem(string menuname){var menuItems = windowsToolStripMenuItem.DropDownItems.Cast<ToolStripMenuItem>();menuItems.ToList().ForEach(m => m.Checked = false);return menuItems.Where(m => m.name == menuname).SingleOrDefault();}private voID newToolStripMenuItem_Click(object sender,EventArgs e){ShowChildForm<FormChild>();}}}
以下是系统自动生成的代码:
namespace windowsFormsApplication1{partial class FormMain{/// <summary>/// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary>/// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param>protected overrIDe voID dispose(bool disposing){if (disposing && (components != null)){components.dispose();}base.dispose(disposing);}#region windows 窗体设计器生成的代码/// <summary>/// 设计器支持所需的方法 - 不要/// 使用代码编辑器修改此方法的内容。/// </summary>private voID InitializeComponent(){this.menuStrip1 = new System.windows.Forms.MenuStrip();this.windowsToolStripMenuItem = new System.windows.Forms.ToolStripMenuItem();this.newToolStripMenuItem = new System.windows.Forms.ToolStripMenuItem();this.splitContainer1 = new System.windows.Forms.SplitContainer();this.menuStrip1.SuspendLayout();((System.ComponentModel.ISupportinitialize)(this.splitContainer1)).BeginInit();this.splitContainer1.SuspendLayout();this.SuspendLayout();// // menuStrip1// this.menuStrip1.Items.AddRange(new System.windows.Forms.ToolStripItem[] {this.windowsToolStripMenuItem,this.newToolStripMenuItem});this.menuStrip1.Location = new System.Drawing.Point(0,0);this.menuStrip1.MdiWindowListItem = this.windowsToolStripMenuItem;this.menuStrip1.name = "menuStrip1";this.menuStrip1.Size = new System.Drawing.Size(1069,25);this.menuStrip1.TabIndex = 1;this.menuStrip1.Text = "menuStrip1";// // windowsToolStripMenuItem// this.windowsToolStripMenuItem.name = "windowsToolStripMenuItem";this.windowsToolStripMenuItem.Size = new System.Drawing.Size(73,21);this.windowsToolStripMenuItem.Text = "windows";this.windowsToolStripMenuItem.Click += new System.EventHandler(this.windowsToolStripMenuItem_Click);// // newToolStripMenuItem// this.newToolStripMenuItem.name = "newToolStripMenuItem";this.newToolStripMenuItem.Size = new System.Drawing.Size(46,21);this.newToolStripMenuItem.Text = "New";this.newToolStripMenuItem.Click += new System.EventHandler(this.newToolStripMenuItem_Click);// // splitContainer1// this.splitContainer1.Backcolor = System.Drawing.Systemcolors.ActiveCaption;this.splitContainer1.Dock = System.windows.Forms.DockStyle.Fill;this.splitContainer1.Location = new System.Drawing.Point(0,25);this.splitContainer1.name = "splitContainer1";// // splitContainer1.Panel2// this.splitContainer1.Panel2.Backcolor = System.Drawing.Systemcolors.Scrollbar;this.splitContainer1.Size = new System.Drawing.Size(1069,526);this.splitContainer1.Splitterdistance = 356;this.splitContainer1.TabIndex = 2;// // FormMain// this.autoScaleDimensions = new System.Drawing.Sizef(6F,12F);this.autoScaleMode = System.windows.Forms.autoScaleMode.Font;this.ClIEntSize = new System.Drawing.Size(1069,551);this.Controls.Add(this.splitContainer1);this.Controls.Add(this.menuStrip1);this.MainMenuStrip = this.menuStrip1;this.name = "FormMain";this.Text = "FormMain";this.Load += new System.EventHandler(this.FormMain_Load);this.menuStrip1.ResumeLayout(false);this.menuStrip1.Performlayout();((System.ComponentModel.ISupportinitialize)(this.splitContainer1)).EndInit();this.splitContainer1.ResumeLayout(false);this.ResumeLayout(false);this.Performlayout();}#endregionprivate System.windows.Forms.MenuStrip menuStrip1;private System.windows.Forms.ToolStripMenuItem windowsToolStripMenuItem;private System.windows.Forms.SplitContainer splitContainer1;private System.windows.Forms.ToolStripMenuItem newToolStripMenuItem;}}
以下是效果演示截图:
以上内容给大家分享了在winform下实现左右布局多窗口界面的方法,有什么更好的实现方法可以在下方评论,不足之处也欢迎指出,谢谢!下面将给大家介绍在winform下实现左右布局多窗口界面的方法之续篇,感兴趣的朋友继续关注。
以上是内存溢出为你收集整理的在winform下实现左右布局多窗口界面的方法全部内容,希望文章能够帮你解决在winform下实现左右布局多窗口界面的方法所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错,欢迎将内存溢出网站推荐给程序员好友。
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)