（十三）c#Winform自定义控件-导航菜单
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前提
入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
GitHub：https://github.com/kwwwvagaa/NetWinformControl
码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
如果觉得写的还行，请点个 star 支持一下吧
欢迎前来交流探讨： 企鹅群568015492 idkey=6e08741ef16fe53bf0314c1c9e336c4f626047943a8b76bac062361bab6b4f8d">
目录
https://www.cnblogs.com/bfyx/p/11364884.html
准备工作
有时候我们需要左侧的导航菜单，那么来整一个吧
先来分析分析，导航菜单一般分为2级或多级，如果是多级的话 用前面的treeview更合适，这里只做2级，为了父子节点样式更方便控制，我们分别实现父子节点。
为了更加的Open，我们使用接口来定义一下
开始
定义一个节点数据绑定实体
[Serializable]
public class MenuItemEntity
{
/// <summary>
/// 键
/// </summary>
public string Key { get; set; }
/// <summary>
/// 文字
/// </summary>
public string Text { get; set; }
/// <summary>
/// 子节点
/// </summary>
public List<MenuItemEntity> Childrens { get; set; }
/// <summary>
/// 自定义数据源，一般用于扩展展示，比如定义节点图片等
/// </summary>
public object DataSource { get; set; } }
再定义一个接口来约束
public interface IMenuItem
{
event EventHandler SelectedItem;
MenuItemEntity DataSource { get; set; }
/// <summary>
/// 设置样式
/// </summary>
/// <param name="styles">key:属性名称,value:属性值</param>
void SetStyle(Dictionary<string, object> styles);
/// <summary>
/// 设置选中样式
/// </summary>
/// <param name="blnSelected">是否选中</param>
void SetSelectedStyle(bool blnSelected);
}
首先看父节点定义，添加一个用户控件，命名UCMenuParentItem，并且实现接口IMenuItem
public event EventHandler SelectedItem;
private MenuItemEntity m_dataSource;
public MenuItemEntity DataSource
{
get
{
return m_dataSource;
}
set
{
m_dataSource = value;
if (value != null)
{
lblTitle.Text = value.Text;
}
}
}
public void SetStyle(Dictionary<string, object> styles)
{
Type t = this.GetType();
foreach (var item in styles)
{
var pro = t.GetProperty(item.Key);
if (pro != null && pro.CanWrite)
{
try
{
pro.SetValue(this, item.Value, null);
}
catch (Exception ex)
{
throw new Exception("菜单元素设置样式异常", ex);
}
}
}
}
public void SetSelectedStyle(bool blnSelected)
{
if (blnSelected)
{
this.lblTitle.Image = Properties.Resources.sanjiao1;
}
else
{
this.lblTitle.Image = Properties.Resources.sanjiao2;
}
}
然后处理下点击事件
lblTitle.MouseDown += lblTitle_MouseDown; void lblTitle_MouseDown(object sender, MouseEventArgs e)
{
if (SelectedItem != null)
{
SelectedItem(this, e);
}
}
这样就完事了，看下完整代码
// 版权所有 黄正辉 交流群：568015492 QQ：623128629
// 文件名称：UCMenuParentItem.cs
// 创建日期：2019-08-15 16:02:35
// 功能描述：Menu
// 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms; namespace HZH_Controls.Controls
{
/// <summary>
/// 父类节点
/// </summary>
[ToolboxItem(false)]
public partial class UCMenuParentItem : UserControl, IMenuItem
{
public event EventHandler SelectedItem; private MenuItemEntity m_dataSource;
public MenuItemEntity DataSource
{
get
{
return m_dataSource;
}
set
{
m_dataSource = value;
if (value != null)
{
lblTitle.Text = value.Text;
}
}
} public UCMenuParentItem()
{
InitializeComponent();
lblTitle.MouseDown += lblTitle_MouseDown;
} public void SetStyle(Dictionary<string, object> styles)
{
Type t = this.GetType();
foreach (var item in styles)
{
var pro = t.GetProperty(item.Key);
if (pro != null && pro.CanWrite)
{
try
{
pro.SetValue(this, item.Value, null);
}
catch (Exception ex)
{
throw new Exception("菜单元素设置样式异常", ex);
}
}
}
} public void SetSelectedStyle(bool blnSelected)
{
if (blnSelected)
{
this.lblTitle.Image = Properties.Resources.sanjiao1;
}
else
{
this.lblTitle.Image = Properties.Resources.sanjiao2;
}
} void lblTitle_MouseDown(object sender, MouseEventArgs e)
{
if (SelectedItem != null)
{
SelectedItem(this, e);
}
}
}
}
namespace HZH_Controls.Controls
{
partial class UCMenuParentItem
{
/// <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 组件设计器生成的代码 /// <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.ucSplitLine_H1 = new HZH_Controls.Controls.UCSplitLine_H();
this.lblTitle = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// ucSplitLine_H1
//
this.ucSplitLine_H1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.ucSplitLine_H1.Dock = System.Windows.Forms.DockStyle.Bottom;
this.ucSplitLine_H1.Location = new System.Drawing.Point(, );
this.ucSplitLine_H1.Name = "ucSplitLine_H1";
this.ucSplitLine_H1.Size = new System.Drawing.Size(, );
this.ucSplitLine_H1.TabIndex = ;
this.ucSplitLine_H1.TabStop = false;
//
// lblTitle
//
this.lblTitle.Dock = System.Windows.Forms.DockStyle.Fill;
this.lblTitle.ForeColor = System.Drawing.Color.White;
this.lblTitle.Image = global::HZH_Controls.Properties.Resources.sanjiao2;
this.lblTitle.ImageAlign = System.Drawing.ContentAlignment.MiddleRight;
this.lblTitle.Location = new System.Drawing.Point(, );
this.lblTitle.Name = "lblTitle";
this.lblTitle.Size = new System.Drawing.Size(, );
this.lblTitle.TabIndex = ;
this.lblTitle.Text = "父项";
this.lblTitle.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// UCMenuParentItem
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.Controls.Add(this.lblTitle);
this.Controls.Add(this.ucSplitLine_H1);
this.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)()));
this.Name = "UCMenuParentItem";
this.Size = new System.Drawing.Size(, );
this.ResumeLayout(false); } #endregion private UCSplitLine_H ucSplitLine_H1;
private System.Windows.Forms.Label lblTitle;
}
}
设计效果就是这样子的了
父节点弄好了，下面就是子节点了
添加用户控件，命名UCMenuChildrenItem，实现接口IMenuItem
public event EventHandler SelectedItem;
private MenuItemEntity m_dataSource;
public MenuItemEntity DataSource
{
get
{
return m_dataSource;
}
set
{
m_dataSource = value;
if (value != null)
{
lblTitle.Text = value.Text;
}
}
}
public void SetStyle(Dictionary<string, object> styles)
{
Type t = this.GetType();
foreach (var item in styles)
{
var pro = t.GetProperty(item.Key);
if (pro != null && pro.CanWrite)
{
try
{
pro.SetValue(this, item.Value, null);
}
catch (Exception ex)
{
throw new Exception("菜单元素设置样式异常", ex);
}
}
}
}
处理下点击事件
this.lblTitle.MouseDown += lblTitle_MouseDown;
void lblTitle_MouseDown(object sender, MouseEventArgs e)
{
if (SelectedItem != null)
{
SelectedItem(this, null);
}
}
这样就完成了，看下完整代码
// 版权所有 黄正辉 交流群：568015492 QQ：623128629
// 文件名称：UCMenuChildrenItem.cs
// 创建日期：2019-08-15 16:02:26
// 功能描述：Menu
// 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms; namespace HZH_Controls.Controls
{
/// <summary>
/// 子类节点
/// </summary>
[ToolboxItem(false)]
public partial class UCMenuChildrenItem : UserControl, IMenuItem
{
public event EventHandler SelectedItem; private MenuItemEntity m_dataSource;
public MenuItemEntity DataSource
{
get
{
return m_dataSource;
}
set
{
m_dataSource = value;
if (value != null)
{
lblTitle.Text = value.Text;
}
}
}
public UCMenuChildrenItem()
{
InitializeComponent();
this.lblTitle.MouseDown += lblTitle_MouseDown;
} void lblTitle_MouseDown(object sender, MouseEventArgs e)
{
if (SelectedItem != null)
{
SelectedItem(this, null);
}
} public void SetStyle(Dictionary<string, object> styles)
{
Type t = this.GetType();
foreach (var item in styles)
{
var pro = t.GetProperty(item.Key);
if (pro != null && pro.CanWrite)
{
try
{
pro.SetValue(this, item.Value, null);
}
catch (Exception ex)
{
throw new Exception("菜单元素设置样式异常", ex);
}
}
}
} public void SetSelectedStyle(bool blnSelected)
{ }
}
}
namespace HZH_Controls.Controls
{
partial class UCMenuChildrenItem
{
/// <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 组件设计器生成的代码 /// <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.ucSplitLine_H1 = new HZH_Controls.Controls.UCSplitLine_H();
this.lblTitle = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// ucSplitLine_H1
//
this.ucSplitLine_H1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.ucSplitLine_H1.Dock = System.Windows.Forms.DockStyle.Bottom;
this.ucSplitLine_H1.Location = new System.Drawing.Point(, );
this.ucSplitLine_H1.Name = "ucSplitLine_H1";
this.ucSplitLine_H1.Size = new System.Drawing.Size(, );
this.ucSplitLine_H1.TabIndex = ;
this.ucSplitLine_H1.TabStop = false;
//
// lblTitle
//
this.lblTitle.Dock = System.Windows.Forms.DockStyle.Fill;
this.lblTitle.Font = new System.Drawing.Font("微软雅黑", 12F);
this.lblTitle.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.lblTitle.Location = new System.Drawing.Point(, );
this.lblTitle.Name = "lblTitle";
this.lblTitle.Size = new System.Drawing.Size(, );
this.lblTitle.TabIndex = ;
this.lblTitle.Text = "子项";
this.lblTitle.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// UCMenuChildrenItem
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.Controls.Add(this.lblTitle);
this.Controls.Add(this.ucSplitLine_H1);
this.Font = new System.Drawing.Font("微软雅黑", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)()));
this.Name = "UCMenuChildrenItem";
this.Size = new System.Drawing.Size(, );
this.ResumeLayout(false); } #endregion private UCSplitLine_H ucSplitLine_H1;
private System.Windows.Forms.Label lblTitle; }
}
设计效果是这样子的
你们有没有发现，父节点和子节点代码非常的相似呢？是的，基本上都是一样的，他们都实现了接口IMenuItem，
那既然如此为什么还要分为2个，这不是代码冗余了吗？这么做的好处就是你可以更方便的控制节点的设计样式，假如有一天，子节点你不想用文字了，你先够用图片呢？
到此，节点定义已经完成了，剩下的就是处理列表了，继续往下看吧。
定义一个用户控件，命名UCMenu
首先定义一个枚举
public enum MenuStyle
{
/// <summary>
/// 平铺
/// </summary>
Fill = ,
/// <summary>
/// 顶部对齐
/// </summary>
Top = ,
}
这个枚举的作用就是改变样式，默认是Fill，也就是子节点面板填充铺满，选中父节点上面的兄弟节点顶端对齐，下面的兄弟节点低端对齐，当父节点较多时候就会出现子节点无法显示的问题，这个时候使用Top就可以了，所有父节点顶端对齐
先看下有哪些属性
/// <summary>
/// 选中项事件
/// </summary>
public event EventHandler SelectedItem;
private Type m_parentItemType = typeof(UCMenuParentItem);
/// <summary>
/// 父类节点类型
/// </summary>
public Type ParentItemType
{
get { return m_parentItemType; }
set
{
if (value == null)
return;
if (!typeof(IMenuItem).IsAssignableFrom(value) || !value.IsSubclassOf(typeof(Control)))
throw new Exception("节点控件没有实现IMenuItem接口");
m_parentItemType = value; }
} private Type m_childrenItemType = typeof(UCMenuChildrenItem);
/// <summary>
/// 子类节点类型
/// </summary>
public Type ChildrenItemType
{
get { return m_childrenItemType; }
set
{
if (value == null)
return;
if (!typeof(IMenuItem).IsAssignableFrom(value) || !value.IsSubclassOf(typeof(Control)))
throw new Exception("节点控件没有实现IMenuItem接口");
m_childrenItemType = value;
}
} private Dictionary<string, object> m_parentItemStyles;
/// <summary>
/// 父类节点样式设置，key：属性名称，value：属性值
/// </summary>
public Dictionary<string, object> ParentItemStyles
{
get { return m_parentItemStyles; }
set { m_parentItemStyles = value; }
} private Dictionary<string, object> m_childrenItemStyles;
/// <summary>
/// 子类节点样式设置，key：属性名称，value：属性值
/// </summary>
public Dictionary<string, object> ChildrenItemStyles
{
get { return m_childrenItemStyles; }
set { m_childrenItemStyles = value; }
} private List<MenuItemEntity> m_dataSource;
/// <summary>
/// 数据源
/// </summary>
public List<MenuItemEntity> DataSource
{
get { return m_dataSource; }
set
{
m_dataSource = value; ReloadItems();
}
}
private bool m_isShowFirstItem = true;
/// <summary>
/// 是否自动展开第一个节点
/// </summary>
public bool IsShowFirstItem
{
get { return m_isShowFirstItem; }
set { m_isShowFirstItem = value; }
} private MenuStyle m_menuStyle = MenuStyle.Fill;
/// <summary>
/// 菜单样式
/// </summary>
public MenuStyle MenuStyle
{
get { return m_menuStyle; }
set { m_menuStyle = value; }
} private List<Control> m_lstParentItems = new List<Control>(); private IMenuItem m_selectParentItem = null;
private IMenuItem m_selectChildrenItem = null; private Panel m_panChildren = null;
数据源改变时需要重新加载
private void ReloadItems()
{
try
{
ControlHelper.FreezeControl(this, true);
this.Controls.Clear();
m_lstParentItems.Clear();
if (m_dataSource != null && m_dataSource.Count > )
{
foreach (var parent in m_dataSource)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_parentItemType);
parentItem.DataSource = parent;
if (m_parentItemStyles != null)
parentItem.SetStyle(m_parentItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
c.Dock = DockStyle.Top;
this.Controls.Add(c);
this.Controls.SetChildIndex(c, );
m_lstParentItems.Add(c);
}
}
m_panChildren = new Panel();
if (m_menuStyle == HZH_Controls.Controls.MenuStyle.Fill)
{
m_panChildren.Dock = DockStyle.Fill;
m_panChildren.Height = ;
}
else
{
m_panChildren.Dock = DockStyle.Top;
m_panChildren.Height = ;
}
m_panChildren.AutoScroll = true;
this.Controls.Add(m_panChildren);
}
finally
{
ControlHelper.FreezeControl(this, false);
} if (m_isShowFirstItem && m_lstParentItems != null && m_lstParentItems.Count > )
{
parentItem_SelectedItem(m_lstParentItems[], null);
}
}
选中父节点时候加载子节点
void parentItem_SelectedItem(object sender, EventArgs e)
{
this.FindForm().ActiveControl = this;
IMenuItem item = sender as IMenuItem;
if (m_lstParentItems.Contains(sender as Control))
{
if (m_selectParentItem != item)
{
if (m_selectParentItem != null)
{
m_selectParentItem.SetSelectedStyle(false);
}
m_selectParentItem = item;
m_selectParentItem.SetSelectedStyle(true);
SetChildrenControl(m_selectParentItem);
}
else
{
m_selectParentItem.SetSelectedStyle(false);
m_selectParentItem = null;
SetChildrenControl(m_selectParentItem, false);
}
}
else if (m_panChildren.Controls.Contains(sender as Control))
{
if (m_selectChildrenItem != item)
{
if (m_selectChildrenItem != null)
{
m_selectChildrenItem.SetSelectedStyle(false);
}
m_selectChildrenItem = item;
m_selectChildrenItem.SetSelectedStyle(true);
}
}
if (SelectedItem != null)
{
SelectedItem(sender, e);
}
} private void SetChildrenControl(IMenuItem menuitem, bool blnChildren = true)
{
try
{
ControlHelper.FreezeControl(this, true);
if (m_menuStyle == HZH_Controls.Controls.MenuStyle.Fill)
{
if (blnChildren)
{
Control cMenu = menuitem as Control;
int index = m_lstParentItems.IndexOf(cMenu);
for (int i = ; i <= index; i++)
{
m_lstParentItems[i].Dock = DockStyle.Top;
this.Controls.SetChildIndex(m_lstParentItems[i], );
}
for (int i = index + ; i < m_lstParentItems.Count; i++)
{
m_lstParentItems[i].Dock = DockStyle.Bottom;
this.Controls.SetChildIndex(m_lstParentItems[i], m_lstParentItems.Count);
}
m_panChildren.Controls.Clear();
int intItemHeigth = ;
foreach (var item in menuitem.DataSource.Childrens)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_childrenItemType);
parentItem.DataSource = item;
if (m_childrenItemStyles != null)
parentItem.SetStyle(m_childrenItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
if (intItemHeigth == )
intItemHeigth = c.Height;
c.Dock = DockStyle.Top;
m_panChildren.Controls.Add(c);
m_panChildren.Controls.SetChildIndex(c, );
}
//m_panChildren.MinimumSize = new Size(0, menuitem.DataSource.Childrens.Count * intItemHeigth);
}
else
{
m_panChildren.Controls.Clear();
foreach (var item in m_lstParentItems)
{
item.Dock = DockStyle.Top;
this.Controls.SetChildIndex(item, );
}
}
}
else
{
if (blnChildren)
{
Control cMenu = menuitem as Control;
int index = m_lstParentItems.IndexOf(cMenu);
this.Controls.SetChildIndex(m_panChildren, m_lstParentItems.Count - index - );
m_panChildren.Controls.Clear();
int intItemHeigth = ;
foreach (var item in menuitem.DataSource.Childrens)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_childrenItemType);
parentItem.DataSource = item;
if (m_childrenItemStyles != null)
parentItem.SetStyle(m_childrenItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
if (intItemHeigth == )
intItemHeigth = c.Height;
c.Dock = DockStyle.Top;
m_panChildren.Controls.Add(c);
m_panChildren.Controls.SetChildIndex(c, );
}
m_panChildren.Height = menuitem.DataSource.Childrens.Count * intItemHeigth;
}
else
{
m_panChildren.Controls.Clear();
m_panChildren.Height = ;
}
}
}
finally
{
ControlHelper.FreezeControl(this, false);
}
}
代码就这么多，看下完整代码
// 版权所有 黄正辉 交流群：568015492 QQ：623128629
// 文件名称：UCMenu.cs
// 创建日期：2019-08-15 16:02:22
// 功能描述：Menu
// 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms; namespace HZH_Controls.Controls
{
public partial class UCMenu : UserControl
{
/// <summary>
/// 选中项事件
/// </summary>
public event EventHandler SelectedItem;
private Type m_parentItemType = typeof(UCMenuParentItem);
/// <summary>
/// 父类节点类型
/// </summary>
public Type ParentItemType
{
get { return m_parentItemType; }
set
{
if (value == null)
return;
if (!typeof(IMenuItem).IsAssignableFrom(value) || !value.IsSubclassOf(typeof(Control)))
throw new Exception("节点控件没有实现IMenuItem接口");
m_parentItemType = value; }
} private Type m_childrenItemType = typeof(UCMenuChildrenItem);
/// <summary>
/// 子类节点类型
/// </summary>
public Type ChildrenItemType
{
get { return m_childrenItemType; }
set
{
if (value == null)
return;
if (!typeof(IMenuItem).IsAssignableFrom(value) || !value.IsSubclassOf(typeof(Control)))
throw new Exception("节点控件没有实现IMenuItem接口");
m_childrenItemType = value;
}
} private Dictionary<string, object> m_parentItemStyles;
/// <summary>
/// 父类节点样式设置，key：属性名称，value：属性值
/// </summary>
public Dictionary<string, object> ParentItemStyles
{
get { return m_parentItemStyles; }
set { m_parentItemStyles = value; }
} private Dictionary<string, object> m_childrenItemStyles;
/// <summary>
/// 子类节点样式设置，key：属性名称，value：属性值
/// </summary>
public Dictionary<string, object> ChildrenItemStyles
{
get { return m_childrenItemStyles; }
set { m_childrenItemStyles = value; }
} private List<MenuItemEntity> m_dataSource;
/// <summary>
/// 数据源
/// </summary>
public List<MenuItemEntity> DataSource
{
get { return m_dataSource; }
set
{
m_dataSource = value; ReloadItems();
}
}
private bool m_isShowFirstItem = true;
/// <summary>
/// 是否自动展开第一个节点
/// </summary>
public bool IsShowFirstItem
{
get { return m_isShowFirstItem; }
set { m_isShowFirstItem = value; }
} private MenuStyle m_menuStyle = MenuStyle.Fill;
/// <summary>
/// 菜单样式
/// </summary>
public MenuStyle MenuStyle
{
get { return m_menuStyle; }
set { m_menuStyle = value; }
} private List<Control> m_lstParentItems = new List<Control>(); private IMenuItem m_selectParentItem = null;
private IMenuItem m_selectChildrenItem = null; private Panel m_panChildren = null; private void ReloadItems()
{
try
{
ControlHelper.FreezeControl(this, true);
this.Controls.Clear();
m_lstParentItems.Clear();
if (m_dataSource != null && m_dataSource.Count > )
{
foreach (var parent in m_dataSource)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_parentItemType);
parentItem.DataSource = parent;
if (m_parentItemStyles != null)
parentItem.SetStyle(m_parentItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
c.Dock = DockStyle.Top;
this.Controls.Add(c);
this.Controls.SetChildIndex(c, );
m_lstParentItems.Add(c);
}
}
m_panChildren = new Panel();
if (m_menuStyle == HZH_Controls.Controls.MenuStyle.Fill)
{
m_panChildren.Dock = DockStyle.Fill;
m_panChildren.Height = ;
}
else
{
m_panChildren.Dock = DockStyle.Top;
m_panChildren.Height = ;
}
m_panChildren.AutoScroll = true;
this.Controls.Add(m_panChildren);
}
finally
{
ControlHelper.FreezeControl(this, false);
} if (m_isShowFirstItem && m_lstParentItems != null && m_lstParentItems.Count > )
{
parentItem_SelectedItem(m_lstParentItems[], null);
}
} void parentItem_SelectedItem(object sender, EventArgs e)
{
this.FindForm().ActiveControl = this;
IMenuItem item = sender as IMenuItem;
if (m_lstParentItems.Contains(sender as Control))
{
if (m_selectParentItem != item)
{
if (m_selectParentItem != null)
{
m_selectParentItem.SetSelectedStyle(false);
}
m_selectParentItem = item;
m_selectParentItem.SetSelectedStyle(true);
SetChildrenControl(m_selectParentItem);
}
else
{
m_selectParentItem.SetSelectedStyle(false);
m_selectParentItem = null;
SetChildrenControl(m_selectParentItem, false);
}
}
else if (m_panChildren.Controls.Contains(sender as Control))
{
if (m_selectChildrenItem != item)
{
if (m_selectChildrenItem != null)
{
m_selectChildrenItem.SetSelectedStyle(false);
}
m_selectChildrenItem = item;
m_selectChildrenItem.SetSelectedStyle(true);
}
}
if (SelectedItem != null)
{
SelectedItem(sender, e);
}
} private void SetChildrenControl(IMenuItem menuitem, bool blnChildren = true)
{
try
{
ControlHelper.FreezeControl(this, true);
if (m_menuStyle == HZH_Controls.Controls.MenuStyle.Fill)
{
if (blnChildren)
{
Control cMenu = menuitem as Control;
int index = m_lstParentItems.IndexOf(cMenu);
for (int i = ; i <= index; i++)
{
m_lstParentItems[i].Dock = DockStyle.Top;
this.Controls.SetChildIndex(m_lstParentItems[i], );
}
for (int i = index + ; i < m_lstParentItems.Count; i++)
{
m_lstParentItems[i].Dock = DockStyle.Bottom;
this.Controls.SetChildIndex(m_lstParentItems[i], m_lstParentItems.Count);
}
m_panChildren.Controls.Clear();
int intItemHeigth = ;
foreach (var item in menuitem.DataSource.Childrens)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_childrenItemType);
parentItem.DataSource = item;
if (m_childrenItemStyles != null)
parentItem.SetStyle(m_childrenItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
if (intItemHeigth == )
intItemHeigth = c.Height;
c.Dock = DockStyle.Top;
m_panChildren.Controls.Add(c);
m_panChildren.Controls.SetChildIndex(c, );
}
//m_panChildren.MinimumSize = new Size(0, menuitem.DataSource.Childrens.Count * intItemHeigth);
}
else
{
m_panChildren.Controls.Clear();
foreach (var item in m_lstParentItems)
{
item.Dock = DockStyle.Top;
this.Controls.SetChildIndex(item, );
}
}
}
else
{
if (blnChildren)
{
Control cMenu = menuitem as Control;
int index = m_lstParentItems.IndexOf(cMenu);
this.Controls.SetChildIndex(m_panChildren, m_lstParentItems.Count - index - );
m_panChildren.Controls.Clear();
int intItemHeigth = ;
foreach (var item in menuitem.DataSource.Childrens)
{
IMenuItem parentItem = (IMenuItem)Activator.CreateInstance(m_childrenItemType);
parentItem.DataSource = item;
if (m_childrenItemStyles != null)
parentItem.SetStyle(m_childrenItemStyles);
parentItem.SelectedItem += parentItem_SelectedItem;
Control c = parentItem as Control;
if (intItemHeigth == )
intItemHeigth = c.Height;
c.Dock = DockStyle.Top;
m_panChildren.Controls.Add(c);
m_panChildren.Controls.SetChildIndex(c, );
}
m_panChildren.Height = menuitem.DataSource.Childrens.Count * intItemHeigth;
}
else
{
m_panChildren.Controls.Clear();
m_panChildren.Height = ;
}
}
}
finally
{
ControlHelper.FreezeControl(this, false);
}
} public UCMenu()
{
InitializeComponent();
}
} public enum MenuStyle
{
/// <summary>
/// 平铺
/// </summary>
Fill = ,
/// <summary>
/// 顶部对齐
/// </summary>
Top = ,
} }
namespace HZH_Controls.Controls
{
partial class UCMenu
{
/// <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 组件设计器生成的代码 /// <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.SuspendLayout();
//
// UCMenu
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.AutoScroll = true;
this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)()))), ((int)(((byte)()))), ((int)(((byte)()))));
this.Name = "UCMenu";
this.Size = new System.Drawing.Size(, );
this.ResumeLayout(false); } #endregion }
}
用处及效果
示例代码
List<MenuItemEntity> lstMenu = new List<MenuItemEntity>();
for (int i = ; i < ; i++)
{
MenuItemEntity item = new MenuItemEntity()
{
Key = "p" + i.ToString(),
Text = "菜单项" + i,
DataSource = "这里编写一些自定义的数据源，用于扩展"
};
item.Childrens = new List<MenuItemEntity>();
for (int j = ; j < ; j++)
{
MenuItemEntity item2 = new MenuItemEntity()
{
Key = "c" + i.ToString(),
Text = "菜单子项" + i + "-" + j,
DataSource = "这里编写一些自定义的数据源，用于扩展"
};
item.Childrens.Add(item2);
}
lstMenu.Add(item);
}
this.ucMenu1.MenuStyle = MenuStyle.Top;
this.ucMenu1.DataSource = lstMenu;
最后的话
如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星 星吧
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