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 WindowsFormsApplication1{  public partial class Form1 : Form  {    ListViewItem lvi;    public Form1()    {      InitializeComponent();    }    private void Form1_Load(object sender, EventArgs e)    {      comboBox1.Visible = false;      listView1.Columns.Add("第一列");      listView1.Columns.Add("第二列");      listView1.Columns.Add("第三列");      this.comboBox1.Items.Add("科比");      this.comboBox1.Items.Add("姚明");      this.comboBox1.Items.Add("杜蘭特");      this.comboBox1.Items.Add("鄧肯");      ListViewItem item;      item = new ListViewItem(1.ToString());      item.SubItems.Add("姚明");      item.SubItems.Add("科比");      listView1.Items.Add(item);      item = new ListViewItem(2.ToString());      item.SubItems.Add("鄧肯");      item.SubItems.Add("杜蘭特");      listView1.Items.Add(item);    }    private void listView1_MouseUp(object sender, MouseEventArgs e)    {      lvi = this.listView1.GetItemAt(e.X, e.Y);      if (lvi != null)      {        //獲取選中行的Bounds         Rectangle Rect = lvi.Bounds;        int LX = listView1.Columns[0].Width;        int RX = listView1.Columns[0].Width + listView1.Columns[1].Width;        // if (e.X > RX || e.X < LX)        //{        this.comboBox1.Visible = false;        Rect.X = listView1.Left + listView1.Columns[0].Width + 2;        Rect.Y = this.listView1.Top + 2+Rect.Y;        Rect.Width = listView1.Columns[1].Width + 2;        this.comboBox1.Bounds = Rect;        this.comboBox1.Text = lvi.SubItems[1].Text;        this.comboBox1.Visible = true;         this.comboBox1.BringToFront();        this.comboBox1.Focus();        //}        // int intColIndex = lvi.SubItems.IndexOf(lvi.GetSubItemAt(e.X, e.Y));      }    }    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)    {      lvi.SubItems[1].Text = comboBox1.Text;      // comboBox1.Visible = false;    }    private void comboBox1_MouseLeave(object sender, EventArgs e)    {      lvi.SubItems[1].Text = comboBox1.Text;     // comboBox1.Visible = false;    }  }}