Winform ListView中使用combox填充单元格

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

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 WindowsFormsAppTest
{
    public partial class ListViewxc : ListView
    {
        private List<Control> controlsxc = new List<Control>();
        private const int WM_PAINT = 0x000F;
        public ListViewxc()
        {
            InitializeComponent();
 
            controlsxc.Clear();
 
            this.OwnerDraw = true;
            this.DrawColumnHeader += new DrawListViewColumnHeaderEventHandler(this_DrawColumnHeader);
            this.DrawSubItem += new DrawListViewSubItemEventHandler(this_DrawSubItem);  
        }
 
        protected override void OnPaint(PaintEventArgs e)
        {
            foreach (Control item in controlsxc)
            {
                ListViewSubItemxc subItemxc = item.Tag as ListViewSubItemxc;
                if (subItemxc != null)
                {
                    Rectangle r = subItemxc.Bounds;
                    ComboBox combox = item as ComboBox;
                    if (combox != null)
                    {
                        if (r.Y > 0 && r.Y < this.ClientRectangle.Height)
                        {
                            combox.Visible = true;
                            combox.Bounds = new Rectangle(r.X + 2, r.Y + 2, r.Width - (2 * 2), r.Height - (2 * 2));
                            System.Diagnostics.Debug.WriteLine(",,," + r.X + " " + r.Y + " " + r.Width + " " + r.Height);
                        }
                        else
                        {
                            combox.Visible = false;
                        }
                    }
                }
            }
 
            base.OnPaint(e);
        }
 
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == WM_PAINT)
            {
                foreach (Control item in controlsxc)
                {
                    ListViewSubItemxc subItemxc = item.Tag as ListViewSubItemxc;
                    if (subItemxc != null)
                    {
                        Rectangle r = subItemxc.Bounds;
                        ComboBox combox = item as ComboBox;
                        if (combox != null)
                        {
                            if (r.Y > 0 && r.Y < this.ClientRectangle.Height)
                            {
                                combox.Visible = true;
                                combox.Bounds = new Rectangle(r.X + 2, r.Y + 2, r.Width - (2 * 2), r.Height - (2 * 2));
                                System.Diagnostics.Debug.WriteLine(",,," + r.X + " " + r.Y + " " + r.Width + " " + r.Height);
                            }
                            else
                            {
                                combox.Visible = false;
                            }
                        }
                    }
                }
            }
 
            base.WndProc(ref m);
        }
 
        private void this_DrawSubItem(object sender, DrawListViewSubItemEventArgs e)
        {
            e.DrawDefault = true;
        }
 
        private void this_DrawColumnHeader(object sender, DrawListViewColumnHeaderEventArgs e)
        {
            e.DrawDefault = true;
        }
 
        public void AddItemxc(ListViewItem item)
        {
            foreach (ListViewItem.ListViewSubItem it in item.SubItems)
            {
                ListViewSubItemxc x = it as ListViewSubItemxc;
                if (x != null && x._control != null)
                {
                    this.Controls.Add(x._control);
                    x._control.Tag = x;
 
                    ComboBox co = x._control as ComboBox;
                    if (co != null)
                    {
                        co.SelectedIndexChanged += Co_SelectedIndexChanged;
                        controlsxc.Add(co);
                    }
                }
            }
 
            this.Items.Add(item);
        }
 
        private void Co_SelectedIndexChanged(object sender, EventArgs e)
        {
            ComboBox co = sender as ComboBox;
            ListViewSubItemxc x = co.Tag as ListViewSubItemxc;
            if (x != null)
            {
                x.Text = co.SelectedText;
            }
        }
    }
 
    public class ListViewSubItemxc : ListViewItem.ListViewSubItem
    {
        public Control _control = null;
 
        public ListViewSubItemxc(Control con)
        {
            _control = con;
        }
    }
}

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 WindowsFormsAppTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
            ListViewItem l = new ListViewItem();
            l.Text = "a";
            ComboBox cb = new ComboBox();
            cb.DropDownStyle = ComboBoxStyle.DropDownList;
            cb.Items.Add("yellow");
            cb.Items.Add("red");
            cb.SelectedIndex = 0;
            ListViewSubItemxc lxc = new ListViewSubItemxc(cb);
 
            ListViewItem l2 = new ListViewItem();
            ComboBox cb2 = new ComboBox();
            cb2.DropDownStyle = ComboBoxStyle.DropDownList;
            cb2.Items.Add("yellow2");
            cb2.Items.Add("red2");
            cb2.SelectedIndex = 1;
            ListViewSubItemxc lxc2 = new ListViewSubItemxc(cb2);
 
            l.SubItems.Add(lxc);
            l2.SubItems.Add(lxc2);
            listViewxc1.AddItemxc(l);
            listViewxc1.AddItemxc(l2);
        }
    }
}