C#例項：datagridview單元格合併
阿新 • • 發佈：2021-10-02
這是替C#微信交流群群友做的一個小例項，目的就是在datagridview選擇對應行以後，點選button後獲取對應行的ip，並執行相應的操作，其實我覺得這樣的話button沒必要非放置到datagridview裡面的！但是為了滿足群友的需求，還是這麼做了。
先看一下執行效果：
1. DataGridView 新增一列checkbox
DataGridViewCheckBoxColumn newColumn = new DataGridViewCheckBoxColumn();
newColumn.HeaderText = "選擇";
dataGridView1.Columns.Add(newColumn);
這樣新增的列是放在最後一列，也許你希望它在其它列，例如第二列，那麼可以：
dataGridView1.Columns.Insert(1, newColumn);
2.DataGridView 新增一個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合併單元格，詳見完整程式碼.
完整程式碼：
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 = "選擇";
//dataGridView1.Columns.Add(newColumn);
dataGridView1.Columns.Insert(3, newColumn1);
DataGridViewButtonColumn newColumn2 = new DataGridViewButtonColumn();
newColumn2.HeaderText = "控制元件";
//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>
/// 將當前單元格中的更改提交到資料快取，但不結束編輯模式，及時獲得其狀態是選中還是未選中
/// </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)
{
// 對第5列相同單元格進行合併
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))
{
// 清除單元格
e.Graphics.FillRectangle(backColorBrush, e.CellBounds);
// 畫 Grid 邊線（僅畫單元格的底邊線和右邊線）
// 如果下一行和當前行的資料不同，則在當前的單元格畫一條底邊線
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);
//畫最後一條記錄的底線
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);
// 畫右邊線
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
e.CellBounds.Top, e.CellBounds.Right - 1,
e.CellBounds.Bottom);
// 畫左邊線
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left ,
e.CellBounds.Top, e.CellBounds.Left ,
e.CellBounds.Bottom);
// 畫（填寫）單元格內容，相同的內容的單元格只填寫第一個
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;
}
}
}
}
}
}
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