完整代码
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Threading.Tasks;
9 using System.Windows.Forms;
10
11 namespace Demo1
12 {
13 public partial class Form2 : Form
14 {
15 public Form2()
16 {
17 InitializeComponent();
18 }
19
20 private void Form2_Load(object sender, EventArgs e)
21 {
22 //dataGridView1.AutoGenerateColumns = false;
23 //dataGridView1.DataSource = null;
24 myDatas.Add(myData);
25 myDatas.Add(myData1);
26 dataGridView1.DataSource = myDatas;
27 }
28 List<MyData> myDatas = new List<MyData>();
29 MyData myData = new MyData();
30 MyData myData1 = new MyData();
31
32 private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
33 {
34 // 判断是否是需要特殊处理的列和行
35
36 int ColumnIndex= dataGridView1.CurrentCell.ColumnIndex;
37 int RowIndex= dataGridView1.CurrentCell.RowIndex;
38
39 Console.WriteLine($"ColumnIndex={ColumnIndex},RowIndex={RowIndex}");
40 if (ColumnIndex == 1 && RowIndex == 1)
41 {
42
43 // 关键1：移除之前可能添加的事件处理程序，防止重复订阅
44 if (currentOverlayControl is ComboBox previousCombo)
45 {
46 previousCombo.SelectedIndexChanged -= OverlayComboBox_SelectedIndexChanged;
47 }
48 if (currentOverlayControl is TextBox previousText)
49 {
50 previousText.TextChanged -= OverlayTextBox_TextChanged;
51 }
52
53 // 移除当前可能存在的覆盖控件
54 if (currentOverlayControl != null)
55 {
56 dataGridView1.Controls.Remove(currentOverlayControl);
57 currentOverlayControl.Dispose();
58 currentOverlayControl = null;
59 }
60
61 // 获取默认的编辑控件（通常是一个TextBox）及其位置
62 Control defaultControl = e.Control;
63 Rectangle cellRect = dataGridView1.GetCellDisplayRectangle(dataGridView1.CurrentCell.ColumnIndex, dataGridView1.CurrentCell.RowIndex, false);
64
65 // 关键2：根据“类型”列的值决定创建哪种覆盖控件
66 string currentType = dataGridView1.CurrentCell.Value?.ToString();
67 //bool isCategoryType = currentType == "分类";
68
69 if (true)
70 {
71 // 创建并配置覆盖用的ComboBox
72 ComboBox overlayCombo = new ComboBox();
73 overlayCombo.DropDownStyle = ComboBoxStyle.DropDownList; // 设置为下拉列表
74 overlayCombo.Items.Add("选项A"); // 设置数据源
75 overlayCombo.Items.Add("选项B"); // 设置数据源
76 overlayCombo.Items.Add("选项C"); // 设置数据源
77 overlayCombo.Size = new Size(cellRect.Width, overlayCombo.Height);
78
79 // 设置初始值为当前单元格的值
80 overlayCombo.SelectedItem = dataGridView1.CurrentCell.Value;
81
82 // 关键3：将ComboBox添加到DataGridView的控件集合中，并定位到当前单元格
83 overlayCombo.Location = new Point(cellRect.Left, cellRect.Top);
84 dataGridView1.Controls.Add(overlayCombo);
85
86 // 订阅ComboBox的值改变事件
87 overlayCombo.SelectedIndexChanged += OverlayComboBox_SelectedIndexChanged;
88
89 // 将焦点和选择项设置给覆盖控件
90 overlayCombo.BringToFront();
91 overlayCombo.Focus();
92 currentOverlayControl = overlayCombo;
93 }
94 else
95 {
96 // 创建并配置覆盖用的TextBox
97 TextBox overlayText = new TextBox();
98 overlayText.Size = new Size(cellRect.Width, cellRect.Height);
99 overlayText.Text = dataGridView1.CurrentCell.Value?.ToString() ?? "";
100
101 overlayText.Location = new Point(cellRect.Left, cellRect.Top);
102 dataGridView1.Controls.Add(overlayText);
103
104 // 订阅TextBox的文本改变事件
105 overlayText.TextChanged += OverlayTextBox_TextChanged;
106
107 overlayText.BringToFront();
108 overlayText.Focus();
109 currentOverlayControl = overlayText;
110 }
111
112 // 隐藏默认的编辑控件
113 defaultControl.Visible = false;
114
115 }
116 }
117 // 当覆盖的ComboBox选项改变时，实时更新单元格的值
118 private void OverlayComboBox_SelectedIndexChanged(object sender, EventArgs e)
119 {
120 if (sender is ComboBox combo && dataGridView1.CurrentCell != null)
121 {
122 dataGridView1.CurrentCell.Value = combo.SelectedItem;
123 }
124 }
125
126 // 当覆盖的TextBox文本改变时，实时更新单元格的值
127 private void OverlayTextBox_TextChanged(object sender, EventArgs e)
128 {
129 if (sender is TextBox textBox && dataGridView1.CurrentCell != null)
130 {
131 dataGridView1.CurrentCell.Value = textBox.Text;
132 }
133 }
134 // 声明一个变量来跟踪当前覆盖的控件，避免重复创建
135 private Control currentOverlayControl = null;
136 // 清理覆盖控件的方法
137 private void CleanupOverlayControl()
138 {
139 if (currentOverlayControl != null)
140 {
141 // 移除事件订阅
142 if (currentOverlayControl is ComboBox combo)
143 {
144 combo.SelectedIndexChanged -= OverlayComboBox_SelectedIndexChanged;
145 }
146 else if (currentOverlayControl is TextBox textBox)
147 {
148 textBox.TextChanged -= OverlayTextBox_TextChanged;
149 }
150
151 // 从控件集合中移除并释放资源
152 dataGridView1.Controls.Remove(currentOverlayControl);
153 currentOverlayControl.Dispose();
154 currentOverlayControl = null;
155 }
156
157 // 确保默认的编辑控件再次可见
158 if (dataGridView1.EditingControl != null)
159 {
160 dataGridView1.EditingControl.Visible = true;
161 }
162 }
163
164 private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
165 {
166 CleanupOverlayControl();
167 }
168
169 private void button1_Click(object sender, EventArgs e)
170 {
171 string fstr = myDatas[1].Name;
172 MessageBox.Show(fstr);
173 }
174 }
175 public class MyData
176 {
177 public int Age { get; set; } = 110;
178 public string Name { get; set; }= "张三";
179
180
181 }
182 }
