这是替C#微信交流群群友做的一个小实例，目的就是在datagridview选择对应行以后，点击button后获取对应行的ip，并执行相应的操作，其实我觉得这样的话button没必要非放置到datagridview里面的！但是为了满足群友的需求，还是这么做了。
先看一下运行效果：
1. DataGridView 添加一列checkbox
DataGridViewCheckBoxColumn newColumn = new DataGridViewCheckBoxColumn();
newColumn.HeaderText = "选择";
dataGridView1.Columns.Add(newColumn);
这样添加的列是放在最后一列，也许你希望它在其它列，例如第二列，那么可以：
dataGridView1.Columns.Insert(1, newColumn);
2. DataGridView 添加一个button
btn1.Name = "btnRun";
btn1.Text = "Run";
btn1.Visible = true;
btn1.Location = new Point(550, 80);
btn1.Size = new Size(80, 50);
btn1.Parent = this;
btn1.Click += new EventHandler(btn1_Click);
//this.Controls.Add(btn1);
dataGridView1.Controls.Add(btn1);
3. datagridview合并单元格，详见完整代码.
完整代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace WindowsFormsApp28
{public partial class Form1 : Form{public Form1(){InitializeComponent();}Button btn1 = new Button();private void Form1_Load(object sender, EventArgs e){DataTable dt = new DataTable();dt.Columns.Add("IP");dt.Columns.Add("Option");dt.Columns.Add("button");dt.Rows.Add("192.168.1.10", null, null);dt.Rows.Add("192.168.1.11", null, null);dt.Rows.Add("192.168.1.12", null, null);dt.Rows.Add("192.168.1.13", null, null);dt.Rows.Add("192.168.1.14", null, null);dt.Rows.Add("192.168.1.15", null, null);dt.Rows.Add("192.168.1.16", null, null);dt.Rows.Add("192.168.1.17", null, null);dt.Rows.Add("192.168.1.18", null, null);dt.Rows.Add("192.168.1.19", null, null);dataGridView1.DataSource = dt;//var list = new List<Object>();//list.Add(new { IP = "192.168.1.10", Option = "null", button = "null" });//list.Add(new { IP = "192.168.1.11", Option = "null", button = "null" });//list.Add(new { IP = "192.168.1.12", Option = "null", button = "null" });//list.Add(new { IP = "192.168.1.13", Option = "null", button = "null" });//list.Add(new { IP = "192.168.1.14", Option = "null", button = "null" });//list.Add(new { IP = "192.168.1.15", Option = "null", button = "null" });//dataGridView1.DataSource = list;DataGridViewCheckBoxColumn newColumn1 = new DataGridViewCheckBoxColumn();newColumn1.HeaderText = "选择";//dataGridView1.Columns.Add(newColumn);dataGridView1.Columns.Insert(3, newColumn1);DataGridViewButtonColumn newColumn2 = new DataGridViewButtonColumn();newColumn2.HeaderText = "控件";//dataGridView1.Columns.Add(newColumn);dataGridView1.Columns.Insert(4, newColumn2);dt.Columns.Add("action");dataGridView1.Rows[0].Cells[0].Value = true;//dataGridView1.Rows[0].Cells[1].Value = true;btn1.Name = "btnRun";btn1.Text = "Run";btn1.Visible = true;btn1.Location = new Point(550, 80);btn1.Size = new Size(80, 50);btn1.Parent = this;btn1.Click += new EventHandler(btn1_Click);//this.Controls.Add(btn1);dataGridView1.Controls.Add(btn1);}private void btn1_Click(object sender, EventArgs e){// MessageBox.Show("123");for (int i = 0; i < dataGridView1.Rows.Count; i++){string otherValue = dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString();if (otherValue == "True")MessageBox.Show(dataGridView1.Rows[i].Cells[2].Value.ToString());}}private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e){if (e.ColumnIndex == dataGridView1.Columns[1].Index)MessageBox.Show(dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString());}/// <summary>/// 将当前单元格中的更改提交到数据缓存，但不结束编辑模式，及时获得其状态是选中还是未选中 /// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e){if (dataGridView1.IsCurrentCellDirty){dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);}}private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e){try{if (dataGridView1.Rows.Count > 0){int rowIndex = dataGridView1.CurrentCell.RowIndex;int colIndex = dataGridView1.CurrentCell.ColumnIndex;if (colIndex == 0) //第一列{string _selectValue = dataGridView1.CurrentCell.EditedFormattedValue.ToString();if (_selectValue == "True"){for (int i = 0; i < dataGridView1.Rows.Count; i++){if (i != rowIndex){string otherValue = dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString();if (otherValue == "True"){((DataGridViewCheckBoxCell)dataGridView1.Rows[i].Cells[0]).Value = false;}}}}}}}catch (Exception ex){ }}private void button1_Click(object sender, EventArgs e){}private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e){// 对第5列相同单元格进行合并 if (e.ColumnIndex == 5 && e.RowIndex != -1){using(Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor),backColorBrush = new SolidBrush(e.CellStyle.BackColor)){using (Pen gridLinePen = new Pen(gridBrush)){// 清除单元格 e.Graphics.FillRectangle(backColorBrush, e.CellBounds);// 画 Grid 边线（仅画单元格的底边线和右边线） // 如果下一行和当前行的数据不同，则在当前的单元格画一条底边线 if (e.RowIndex < dataGridView1.Rows.Count - 1 &&dataGridView1.Rows[e.RowIndex ].Cells[e.ColumnIndex].Value.ToString() !=e.Value.ToString())e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left + 2,e.CellBounds.Bottom - 1, e.CellBounds.Right - 1,e.CellBounds.Bottom - 1);//画最后一条记录的底线 if (e.RowIndex == dataGridView1.Rows.Count - 1)e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left + 2,e.CellBounds.Bottom - 1, e.CellBounds.Right - 1,e.CellBounds.Bottom - 1);// 画右边线 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,e.CellBounds.Top, e.CellBounds.Right - 1,e.CellBounds.Bottom);// 画左边线 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left ,e.CellBounds.Top, e.CellBounds.Left ,e.CellBounds.Bottom);// 画（填写）单元格内容，相同的内容的单元格只填写第一个 if (e.Value != null){if (e.RowIndex > 0 &&dataGridView1.Rows[e.RowIndex - 1].Cells[e.ColumnIndex].Value.ToString() ==e.Value.ToString()){}else{//e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,//Brushes.Black, e.CellBounds.X + 2,//e.CellBounds.Y + 5, StringFormat.GenericDefault);}}e.Handled = true;}}}}}
}
