WinForm DataGridView双向数据绑定
标签：ini add 修改 bindings reset strong caller tar col
程序目标：
实现DataGridView与BindingList双向绑定。用户通过DataGridView修改值后立即更新BindList对象的值，代码修改BindList后立即更新DataGridView的显示。
实现环境：vs2017 C# WinForm
Code：
1 ///****************************************************************************
2 /// CLR版本 ：4.0.30319.42000
3 /// 邮 箱 ：282780854@qq.com
4 /// 博 客 ：https://www.cnblogs.com/it89/
5 /// 创 建 者 ：龙腾虎跃
6 /// 创建日期 ：2019/1/15 21:02:04
7 /// 功能描述 ：
8 /// 使用说明 ：
9 ///****************************************************************************
10 using System;
11 using System.ComponentModel;
12 using System.Windows.Forms;
13
14 namespace TestDataGridViewBind
15 {
16 public partial class Form1 : Form
17 {
18 private DataGridView mDataGridView;
19 //private BindingSource mBindingSource; //绑定方式一需要的。
20 private Button mAddItemBtn;
21 private Button mChangeItemValueBtn;
22 private Button mDeleteItemBtn;
23
24 public BindingList Peoples { get; set; }
25
26 public Form1()
27 {
28 this.Load += this.Form1_Load;
29 InitializeComponent();
30 }
31 public void Form1_Load(object sender, EventArgs e)
32 {
33 //初始化mDataGridView对象
34 mDataGridView = new DataGridView();
35 mDataGridView.AutoSize = true;
36 mDataGridView.Left = 10;
37 mDataGridView.Top = 40;
38
39 //初始化mAddItemBtn按钮。
40 this.mAddItemBtn = new Button();
41 mAddItemBtn.Text = "Add People";
42 mAddItemBtn.AutoSize = true;
43 mAddItemBtn.Left = 30;
44 mAddItemBtn.Top = 10;
45 mAddItemBtn.Click += this.mAddItemBtn_Click;
46
47 //初始化mDeleteItemBtn按钮
48 mDeleteItemBtn = new Button();
49 mDeleteItemBtn.Text = "Delete Item";
50 mDeleteItemBtn.AutoSize = true;
51 mDeleteItemBtn.Left = 120;
52 mDeleteItemBtn.Top = 10;
53 mDeleteItemBtn.Click += mDeleteItemBtn_Click;
54
55 //初始化mChangeItemValueBtn按钮。
56 mChangeItemValueBtn = new Button();
57 mChangeItemValueBtn.Text = "Change Item Value";
58 mChangeItemValueBtn.AutoSize = true;
59 mChangeItemValueBtn.Left = 220;
60 mChangeItemValueBtn.Top = 10;
61 mChangeItemValueBtn.Click += this.mChangeItemValueBtn_Click;
62
63 //初始化Form1。
64 this.Controls.Add(mDataGridView);
65 this.Controls.Add(mAddItemBtn);
66 this.Controls.Add(mDeleteItemBtn);
67 this.Controls.Add(mChangeItemValueBtn);
68 this.AutoSize = true;
69 this.Text = "DataGridView object binding demo";
70
71 //初始化Peoples对象。
72 Peoples = new BindingList();
73 Peoples.Add(new People("张三", "北京", 25));
74 Peoples.Add(new People("李四", "上海", 28));
75 Peoples.Add(new People("王五", "深圳", 30));
76
77 //绑定方式一：通过BindingSource对象把Peoples绑定到mDataGridView控件。
78 //mBindingSource = new BindingSource();
79 //mBindingSource.DataSource = Peoples;
80 //mDataGridView.DataSource = mBindingSource;
81
82 //绑定方式二：直接通过mDataGridView.DataBindings绑定Peoples。Peoples不能引发改变通知事件，但是People类型继承了INotifyPropertyChanged接口，可以引发改变通知事件。
83 mDataGridView.DataBindings.Add("DataSource", this, "Peoples", false, DataSourceUpdateMode.OnPropertyChanged);
84 }
85
86 private void mAddItemBtn_Click(object sender, EventArgs e)
87 {
88 this.Peoples.Add(new People("新人", "湖南", 30));
89 }
90
91 private void mDeleteItemBtn_Click(object sender, EventArgs e)
92 {
93 if (this.Peoples.Count > 0)
94 {
95 this.Peoples.RemoveAt(0);
96 }
97 }
98
99 private void mChangeItemValueBtn_Click(object sender, EventArgs e)
100 {
101 if (Peoples.Count > 0)
102 {
103 this.Peoples[0].Address = "浙江";
104 //如果People没有继承INotifyPropertyChanged接口，则需要下面注释的代码，来引发改变通知事件。
105 //this.Peoples.ResetItem(0);//引发改变通知
106 }
107
108 if (Peoples.Count > 1)
109 {
110 this.Peoples[1].Age = Peoples[1].Age + 1;
111 //this.Peoples.ResetItem(1);//引发改变通知
112 }
113 }
114 }
115 }
Form1.cs
1 ///****************************************************************************
2 /// CLR版本 ：4.0.30319.42000
3 /// 邮 箱 ：282780854@qq.com
4 /// 博 客 ：https://www.cnblogs.com/it89/
5 /// 创 建 者 ：龙腾虎跃
6 /// 创建日期 ：2019/1/15 21:03:04
7 /// 功能描述 ：
8 /// 使用说明 ：
9 ///****************************************************************************
10 using System;
11 using System.ComponentModel;
12 using System.Runtime.CompilerServices;
13
14 namespace TestDataGridViewBind
15 {
16 ///
17 ///
18 ///
19 public class People : INotifyPropertyChanged
20 {
21 #region "Public Section"
22 public string Name
23 {
24 get => mName;
25 set { mName = value; NotifyPropertyChanged("Name"); }
26 }
27
28 public string Address
29 {
30 get => mAddresss;
31 set { mAddresss = value; NotifyPropertyChanged("Address"); }
32 }
33
34 public int Age
35 {
36 get => mAge;
37 set { mAge = value; NotifyPropertyChanged("Age"); }
38 }
39
40 public People(string name, string address, int age)
41 {
42 mName = name;
43 mAddresss = address;
44 mAge = age;
45 }
46
47 public event PropertyChangedEventHandler PropertyChanged;
48
49 #endregion
50
51 #region "Private Section"
52 private string mName;
53 private string mAddresss;
54 private int mAge;
55
56 ///
57 /// 该方法由每个属性Set访问器调用。
58 ///
59 ///
60 private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
61 {
62 PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
63 }
64
65 #endregion
66 }
67 }
People.cs
WinForm DataGridView双向数据绑定
标签：ini add 修改 bindings reset strong caller tar col
原文地址：https://www.cnblogs.com/it89/p/10274852.html
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