XtraTreeList 是DevExpress中的一个树形控件,它可以将信息显示为树状、网格或两者的结合,XtraTreeList 不缓存任何数据,因此只占用少量内存,并且快速执行数据操作,今天我给大家实战演示如何快速建立一个常规TreeList!
首先介绍一下软件的主界面,TreeList中包括学科、作者、ISBN、出版日期和版次等字段,并由两个父节点建立分支,如图1所示:
1.XtraTreeList添加列
首先建立一个Winform,目标框架选择.Net4.7.2或以上,在界面上添加一个TreeList控件,右键选择“Run Designer”,分别添加学科、作者、ISBN、出版日期和版次的列,如图2所示:
2.建立Library类设置属性
我们新建一个Library类用来绑定TreeList,类中声明了子节点ID、父节点ID、学科、作者、ISBN、出版日期和版次等字段,建立相应的属性设置方法。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace CreateXtraTreeList { class Library { //子节点ID变量 private int m_ID = -1; //父节点ID变量 private int m_ParentID = -1; // 学科字段变量 private string m_Subject = string.Empty; // 作者字段变量 private string m_Author = string.Empty; // ISBN字段变量 private string m_ISBN = string.Empty; // 出版日期字段变量 private string m_Pdate = string.Empty; // 班次字段变量 private string m_Version = string.Empty; public int ID { get { return m_ID; } set { m_ID = value; } } public int ParentID { get { return m_ParentID; } set { m_ParentID = value; } } public string Subject { get { return m_Subject; } set { m_Subject = value; } } public string Author { get { return m_Author; } set { m_Author = value; } } public string ISBN { get { return m_ISBN; } set { m_ISBN = value; } } public string Pdate { get { return m_Pdate; } set { m_Pdate = value; } } public string Version { get { return m_Version; } set { m_Version = value; } } } }
3.TreeList绑定数据
双击主界面生成FormLoad函数,在函数中完成字段赋值和TreeList的数据绑定。
private void Form1_Load(object sender, EventArgs e) { ArrayList BookList = new ArrayList();//声明一个ArrayList存放图书信息 Library m_catefory1 = new Library(); m_catefory1.ID = 1; m_catefory1.Subject = "计算机科学与技术"; BookList.Add(m_catefory1); Library m_book1 = new Library(); m_book1.ID = 2;//子节点2 m_book1.ParentID = 1;//隶属父节点1 m_book1.Subject = "C#设计模式"; m_book1.Author = "(美)James W. Cooper"; m_book1.ISBN = "9787030308153"; m_book1.Pdate = "2011-07"; m_book1.Version = "1"; BookList.Add(m_book1); Library m_book2 = new Library(); m_book2.ID = 3;//子节点3 m_book2.ParentID = 1;//隶属父节点1 m_book2.Subject = "C#面向对象程序设计"; m_book2.Author = "黄聪明"; m_book2.ISBN = "7030124847"; m_book2.Pdate = "2004-01"; m_book2.Version = "1"; BookList.Add(m_book2); Library m_book3 = new Library(); m_book3.ID = 4;//子节点4 m_book3.ParentID = 1;//隶属父节点1 m_book3.Subject = "C#程序设计案例教程"; m_book3.Author = "王明福"; m_book3.ISBN = "9787030239747"; m_book3.Pdate = "2009-02"; m_book3.Version = "1"; BookList.Add(m_book3); Library m_catefory2 = new Library(); m_catefory2.ID = 5; m_catefory2.Subject = "文学"; BookList.Add(m_catefory2); Library m_book4 = new Library(); m_book4.ID = 6;//子节点6 m_book4.ParentID = 5;//隶属父节点5 m_book4.Subject = "殷商西周散文文体研究"; m_book4.Author = "梅軍"; m_book4.ISBN = "9787030478566"; m_book4.Pdate = "2016-03"; m_book4.Version = "1"; BookList.Add(m_book4); Library m_book5 = new Library(); m_book5.ID = 7;//子节点7 m_book5.ParentID = 5;//隶属父节点5 m_book5.Subject = "生命无序 : 李肇星的家国情怀"; m_book5.Author = "李肇星"; m_book5.ISBN = "9787030285867"; m_book5.Pdate = "2011-02"; m_book5.Version = "1"; BookList.Add(m_book5); this.treeList1.OptionsView.ShowCheckBoxes = true;// //是否显示CheckBox this.treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;// //设置节点是否有中间状态,即一部分子节点选中,一部分子节点没有选中 this.treeList1.DataSource = BookList;//将BookList数据绑定到treeList1上 this.treeList1.RefreshDataSource();//刷新reeList1 }
4.进阶功能
TreeList作为一个属性控件,必须能够实现两个基本功能:
1)TreeList带有CheckBox,节点有三种状态(全部勾选、全部不勾选、部分勾选),可通过下面代码实现;
this.treeList1.OptionsView.ShowCheckBoxes = true;// //是否显示CheckBox this.treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;// //设置节点是否有中间状态,即一部分子节点选中,一部分子节点没有选中
2)选择的父节点和子节点相互影响,例如选择了父节点则自动勾选所有的子节点,可通过下面代码实现。
/// <summary> /// 节点选中前事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void treeList1_BeforeCheckNode(object sender, DevExpress.XtraTreeList.CheckNodeEventArgs e) { e.State = (e.PrevState == CheckState.Checked ? CheckState.Unchecked : CheckState.Checked); } /// <summary> /// 节点选中后事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void treeList1_AfterCheckNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e) { SetCheckedChildNodes(e.Node, e.Node.CheckState); SetCheckedParentNodes(e.Node, e.Node.CheckState); } /// <summary> /// 设置子节点的状态 /// </summary> /// <param name="node"></param> /// <param name="check"></param> private void SetCheckedChildNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check) { for (int i = 0; i < node.Nodes.Count; i++) { node.Nodes[i].CheckState = check; SetCheckedChildNodes(node.Nodes[i], check); } } /// <summary> /// 设置父节点的状态 /// </summary> /// <param name="node"></param> /// <param name="check"></param> private void SetCheckedParentNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check) { if (node.ParentNode != null) { bool b = false; CheckState state; for (int i = 0; i < node.ParentNode.Nodes.Count; i++) { state = (CheckState)node.ParentNode.Nodes[i].CheckState; if (!check.Equals(state)) { b = !b; break; } } node.ParentNode.CheckState = b ? CheckState.Indeterminate : check; SetCheckedParentNodes(node.ParentNode, check); } }
代码全文:
using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace CreateXtraTreeList { public partial class Form1 : Form { public Form1() { InitializeComponent(); } /// <summary> /// 节点选中前事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void treeList1_BeforeCheckNode(object sender, DevExpress.XtraTreeList.CheckNodeEventArgs e) { e.State = (e.PrevState == CheckState.Checked ? CheckState.Unchecked : CheckState.Checked); } /// <summary> /// 节点选中后事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void treeList1_AfterCheckNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e) { SetCheckedChildNodes(e.Node, e.Node.CheckState); SetCheckedParentNodes(e.Node, e.Node.CheckState); } /// <summary> /// 设置子节点的状态 /// </summary> /// <param name="node"></param> /// <param name="check"></param> private void SetCheckedChildNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check) { for (int i = 0; i < node.Nodes.Count; i++) { node.Nodes[i].CheckState = check; SetCheckedChildNodes(node.Nodes[i], check); } } /// <summary> /// 设置父节点的状态 /// </summary> /// <param name="node"></param> /// <param name="check"></param> private void SetCheckedParentNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check) { if (node.ParentNode != null) { bool b = false; CheckState state; for (int i = 0; i < node.ParentNode.Nodes.Count; i++) { state = (CheckState)node.ParentNode.Nodes[i].CheckState; if (!check.Equals(state)) { b = !b; break; } } node.ParentNode.CheckState = b ? CheckState.Indeterminate : check; SetCheckedParentNodes(node.ParentNode, check); } } private void Form1_Load(object sender, EventArgs e) { ArrayList BookList = new ArrayList();//声明一个ArrayList存放图书信息 Library m_catefory1 = new Library(); m_catefory1.ID = 1; m_catefory1.Subject = "计算机科学与技术"; BookList.Add(m_catefory1); Library m_book1 = new Library(); m_book1.ID = 2;//子节点2 m_book1.ParentID = 1;//隶属父节点1 m_book1.Subject = "C#设计模式"; m_book1.Author = "(美)James W. Cooper"; m_book1.ISBN = "9787030308153"; m_book1.Pdate = "2011-07"; m_book1.Version = "1"; BookList.Add(m_book1); Library m_book2 = new Library(); m_book2.ID = 3;//子节点3 m_book2.ParentID = 1;//隶属父节点1 m_book2.Subject = "C#面向对象程序设计"; m_book2.Author = "黄聪明"; m_book2.ISBN = "7030124847"; m_book2.Pdate = "2004-01"; m_book2.Version = "1"; BookList.Add(m_book2); Library m_book3 = new Library(); m_book3.ID = 4;//子节点4 m_book3.ParentID = 1;//隶属父节点1 m_book3.Subject = "C#程序设计案例教程"; m_book3.Author = "王明福"; m_book3.ISBN = "9787030239747"; m_book3.Pdate = "2009-02"; m_book3.Version = "1"; BookList.Add(m_book3); Library m_catefory2 = new Library(); m_catefory2.ID = 5; m_catefory2.Subject = "文学"; BookList.Add(m_catefory2); Library m_book4 = new Library(); m_book4.ID = 6;//子节点6 m_book4.ParentID = 5;//隶属父节点5 m_book4.Subject = "殷商西周散文文体研究"; m_book4.Author = "梅軍"; m_book4.ISBN = "9787030478566"; m_book4.Pdate = "2016-03"; m_book4.Version = "1"; BookList.Add(m_book4); Library m_book5 = new Library(); m_book5.ID = 7;//子节点7 m_book5.ParentID = 5;//隶属父节点5 m_book5.Subject = "生命无序 : 李肇星的家国情怀"; m_book5.Author = "李肇星"; m_book5.ISBN = "9787030285867"; m_book5.Pdate = "2011-02"; m_book5.Version = "1"; BookList.Add(m_book5); this.treeList1.OptionsView.ShowCheckBoxes = true;// //是否显示CheckBox this.treeList1.OptionsBehavior.AllowIndeterminateCheckState = true;// //设置节点是否有中间状态,即一部分子节点选中,一部分子节点没有选中 this.treeList1.DataSource = BookList;//将BookList数据绑定到treeList1上 this.treeList1.RefreshDataSource();//刷新reeList1 } private void Button1_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start("https://www.daboke.com");//欢迎访问大博客,阅读更多编程实战案例! } private void Button2_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start("https://www.daboke.com/devexpress/xtratreelist.html");//原文链接! } private void Button3_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start("https://space.bilibili.com/580719958");//欢迎访问我的B站频道-编程自修室,观看更多C#编程实战视频! } } }
原文链接:https://www.daboke.com/devexpress/xtratreelist.html
B站up主-编程自修室:https://space.bilibili.com/580719958
源码下载:CreateXtraTreeList
很不错的测试功能了
来看看!
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