（四⼗三）c#Winform⾃定义控件-Listview-HZHControls 官⽹
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：
码云：
如果觉得写的还⾏，请点个 star ⽀持⼀下吧
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NuGet
Install-Package HZH_Controls
⽬录
⽤处及效果
使⽤分页控件效果
不使⽤分页控件效果
准备⼯作
我们需要元素控件，需要列表控件，另外为了具有更好的扩展性，元素控件实现接⼝，⽅便进⾏扩展
我们⽤到了分页控件，如果你还不了解，请移步查看
我们这⾥的元素控件⽤到圆⾓，故继承基类控件UCControlBase，如果不了解，请移步查看开始
添加⼀个接⼝，⽤来约束元素控件
1public interface IListViewItem
2 {
3///<summary>
4///数据源
5///</summary>
6object DataSource { get; set; }
7///<summary>
8///选中项事件
9///</summary>
10event EventHandler SelectedItemEvent;
11///<summary>
12///选中处理，⼀般⽤以更改选中效果
13///</summary>
14///<param name="blnSelected">是否选中</param>
15void SetSelected(bool blnSelected);
16 }
添加⼀个元素控件，命名UCListViewItem，我们这⾥继承基类控件UCControlBase，实现接⼝IListViewItem 1using System;
2using System.Collections.Generic;
3using System.ComponentModel;
4using System.Drawing;
5using System.Data;
6using System.Linq;
7using System.Text;
8using System.Windows.Forms;
9
10namespace HZH_Controls.Controls
11 {
12 [ToolboxItem(false)]
13public partial class UCListViewItem : UCControlBase, IListViewItem
14 {
15private object m_dataSource;
16public object DataSource
17 {
18get
19 {
20return m_dataSource;
21 }
22set
23 {
24 m_dataSource = value;
25 lblTitle.Text = value.ToString();
26 }
27 }
28
29public event EventHandler SelectedItemEvent;
30public UCListViewItem()
31 {
32 InitializeComponent();
33 lblTitle.MouseDown += lblTitle_MouseDown;
34 }
35
36void lblTitle_MouseDown(object sender, MouseEventArgs e)
37 {
38if (SelectedItemEvent != null)
39 {
40 SelectedItemEvent(this, e);
41 }
42 }
43
44public void SetSelected(bool blnSelected)
45 {
46if (blnSelected)
47this.FillColor = Color.FromArgb(255, 247, 245);
48else
49this.FillColor = Color.White;
50this.Refresh();
51 }
52 }
53 }
1namespace HZH_Controls.Controls
2 {
3partial class UCListViewItem
4 {
5///<summary>
6///必需的设计器变量。
7///</summary>
8private System.ComponentModel.IContainer components = null;
9
10///<summary>
11///清理所有正在使⽤的资源。
12///</summary>
13///<param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> 14protected override void Dispose(bool disposing)
15 {
16if (disposing && (components != null))
17 {
18 components.Dispose();
19 }
20base.Dispose(disposing);
21 }
22
23#region组件设计器⽣成的代码
24
25///<summary>
26///设计器⽀持所需的⽅法 - 不要
27///使⽤代码编辑器修改此⽅法的内容。
28///</summary>
29private void InitializeComponent()
30 {
31this.lblTitle = new System.Windows.Forms.Label();
32this.SuspendLayout();
33//
34// lblTitle
35//
36this.lblTitle.Dock = System.Windows.Forms.DockStyle.Fill;
37this.lblTitle.Location = new System.Drawing.Point(0, 0);
38this.lblTitle.Name = "lblTitle";
39this.lblTitle.Size = new System.Drawing.Size(107, 96);
40this.lblTitle.TabIndex = 0;
41this.lblTitle.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
42//
43// UCListViewItem
44//
45this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
46this.BackColor = System.Drawing.Color.Transparent;
47this.Controls.Add(this.lblTitle);
48this.FillColor = System.Drawing.Color.White;
49this.IsRadius = true;
50this.IsShowRect = true;
51this.Name = "UCListViewItem";
52this.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
53this.Size = new System.Drawing.Size(107, 96);
54this.ResumeLayout(false);
55
56 }
57
58#endregion
59
60private System.Windows.Forms.Label lblTitle;
61 }
62 }excel listview控件
View Code
然后需要⼀个列表来显⽰元素控件
添加⼀个⽤户控件，命名UCListView
⼀些属性
1int m_intCellWidth = 130;//单元格宽度
2int m_intCellHeight = 120;//单元格⾼度
3
4private Type m_itemType = typeof(UCListViewItem);
5
6 [Description("单元格类型，如果⽆法满⾜您的需求，你可以⾃定义单元格控件，并实现接⼝IListViewItem"), Category("⾃定义")]
7public Type ItemType
8 {
9get { return m_itemType; }
10set
11 {
12if (!typeof(IListViewItem).IsAssignableFrom(value) || !value.IsSubclassOf(typeof(Control)))
13throw new Exception("单元格控件没有继承实现接⼝IListViewItem");
14 m_itemType = value;
15 }
16 }
17
18private UCPagerControlBase m_page = null;
19///<summary>
20///翻页控件
21///</summary>
22 [Description("翻页控件，如果UCPagerControl不满⾜你的需求，请⾃定义翻页控件并继承UCPagerControlBase"), Category("⾃定义")] 23public UCPagerControlBase Page
24 {
25get { return m_page; }
26set
27 {
28 m_page = value;
29if (value != null)
30 {
31if (!typeof(IPageControl).IsAssignableFrom(value.GetType()) || !value.GetType().IsSubclassOf(typeof(UCPagerControlBase))) 32throw new Exception("翻页控件没有继承UCPagerControlBase");
33this.panMain.AutoScroll = false;
34 panPage.Visible = true;
35this.Controls.SetChildIndex(panMain, 0);
36 m_page.ShowSourceChanged += m_page_ShowSourceChanged;
37 m_page.Dock = DockStyle.Fill;
38this.panPage.Controls.Clear();
39this.panPage.Controls.Add(m_page);
40 GetCellCount();
41this.DataSource = m_page.GetCurrentSource();
42 }
43else
44 {
45this.panMain.AutoScroll = true;
46 m_page = null;
47 panPage.Visible = false;
48 }
49 }
50 }
51
52
53
54private object m_dataSource = null;
55
56 [Description("数据源，如果使⽤翻页控件，请使⽤翻页控件的DataSource"), Category("⾃定义")]
57public object DataSource
58 {
59get { return m_dataSource; }
60set
61 {
62if (value == null)
63return;
64if (!typeof(IList).IsAssignableFrom(value.GetType()))
65 {
66throw new Exception("数据源不是有效的数据类型，列表");
67 }
68 m_dataSource = value;
69 ReloadSource();
70 }
71 }
72
73int m_intCellCount = 0;//单元格总数
74 [Description("单元格总数"), Category("⾃定义")]
75public int CellCount
76 {
77get { return m_intCellCount; }
78private set
79 {
80 m_intCellCount = value;
81if (value > 0 && m_page != null)
82 {
83 m_page.PageSize = m_intCellCount;
84 m_page.Reload();
85 }
86 }
87 }
88
89private List<object> m_selectedSource = new List<object>();
90
91 [Description("选中的数据"), Category("⾃定义")]
92public List<object> SelectedSource
93 {
94get { return m_selectedSource; }
95set
96 {
97 m_selectedSource = value;
98 ReloadSource();
99 }
100 }
101
102private bool m_isMultiple = true;
103
104 [Description("是否多选"), Category("⾃定义")]
105public bool IsMultiple
106 {
107get { return m_isMultiple; }
108set { m_isMultiple = value; }
109 }
110
111 [Description("选中项事件"), Category("⾃定义")]
112public event EventHandler SelectedItemEvent;
113public delegate void ReloadGridStyleEventHandle(int intCellCount);
114///<summary>
115///样式改变事件
116///</summary>
117 [Description("样式改变事件"), Category("⾃定义")]
118public event ReloadGridStyleEventHandle ReloadGridStyleEvent;
⼀下辅助函数
1#region重新加载数据源
2///<summary>
3///功能描述：重新加载数据源
4///作 者:HZH
5///创建⽇期:2019-06-27 16:47:32
6///任务编号:POS
7///</summary>
8public void ReloadSource()
9 {
10 ControlHelper.FreezeControl(this, true);
11if (this.panMain.Controls.Count <= 0)
12 {
13 ReloadGridStyle();
14 }
15if (m_dataSource == null || ((IList)m_dataSource).Count <= 0)
16 {
17for (int i = this.panMain.Controls.Count - 1; i >= 0; i--)
18 {
19this.panMain.Controls[i].Visible = false;
20 }
21
22return;
23 }
24int intCount = Math.Min(((IList)m_dataSource).Count, this.panMain.Controls.Count);
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