? ListView VirtualMode - 嘉科软件

ListView VirtualMode

分类：编程 ｜ 作者：admin ｜ 发表于2010/02/02 2条评论　

namespace ListviewVirtualTest
{
    partial class Form2
    {
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name=”disposing”>如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码

        /**//// <summary>
        /// 设计器支持所需的方法 – 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.listView1 = new System.Windows.Forms.ListView();
            this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
            this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
            this.button2 = new System.Windows.Forms.Button();
            this.button3 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(1, 2);
            this.button1.Name = “button1″;
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 0;
            this.button1.Text = “button1″;
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // listView1
            //
            this.listView1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                        | System.Windows.Forms.AnchorStyles.Left)
                        | System.Windows.Forms.AnchorStyles.Right)));
            this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
            this.columnHeader1,
            this.columnHeader2});
            this.listView1.Location = new System.Drawing.Point(1, 31);
            this.listView1.Name = “listView1″;
            this.listView1.Size = new System.Drawing.Size(592, 388);
            this.listView1.TabIndex = 1;
            this.listView1.UseCompatibleStateImageBehavior = false;
            this.listView1.View = System.Windows.Forms.View.Details;
            this.listView1.ColumnClick += new System.Windows.Forms.ColumnClickEventHandler(this.listView1_ColumnClick);
            //
            // columnHeader1
            //
            this.columnHeader1.Width = 138;
            //
            // columnHeader2
            //
            this.columnHeader2.Width = 214;
            //
            // button2
            //
            this.button2.Location = new System.Drawing.Point(82, 2);
            this.button2.Name = “button2″;
            this.button2.Size = new System.Drawing.Size(75, 23);
            this.button2.TabIndex = 2;
            this.button2.Text = “button2″;
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.button2_Click);
            //
            // button3
            //
            this.button3.Location = new System.Drawing.Point(163, 2);
            this.button3.Name = “button3″;
            this.button3.Size = new System.Drawing.Size(75, 23);
            this.button3.TabIndex = 3;
            this.button3.Text = “button3″;
            this.button3.UseVisualStyleBackColor = true;
            this.button3.Click += new System.EventHandler(this.button3_Click);
            //
            // Form2
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(595, 431);
            this.Controls.Add(this.button3);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.listView1);
            this.Controls.Add(this.button1);
            this.Name = “Form2″;
            this.Text = “Form2″;
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.ListView listView1;
        private System.Windows.Forms.ColumnHeader columnHeader1;
        private System.Windows.Forms.ColumnHeader columnHeader2;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Button button3;
    }
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace ListviewVirtualTest
{
    public partial class Form2 : Form
    {
        private List<ListViewItem> m_hListViewItems;
        private MySorter mySorter;
        public Form2()
        {
            InitializeComponent();
            m_hListViewItems = new List<ListViewItem>();
            mySorter = new MySorter();
        }

        void listView_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
        {
            e.Item = m_hListViewItems[e.ItemIndex];
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int NR = 10000;

            for (int i = 0; i < NR; i++)
                m_hListViewItems.Add(
                    new ListViewItem(new string[] { i + ” test1″, i + ” test2″ }));

            listView1.RetrieveVirtualItem += new RetrieveVirtualItemEventHandler(listView_RetrieveVirtualItem);

            listView1.VirtualListSize = NR;
            listView1.VirtualMode = true;
        }

        //更新
        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < m_hListViewItems.Count; i++)
            {
                m_hListViewItems[i].SubItems[0].Text = i + ” ” + DateTime.Now.ToString();
                m_hListViewItems[i].SubItems[1].Text = i + ” ” + DateTime.Now.ToString();
            }

            listView1.Invalidate();
        }

        // 删除
        private void button3_Click(object sender, EventArgs e)
        {
            List<ListViewItem> list = new List<ListViewItem>();
            for (int i = 0; i < m_hListViewItems.Count; i += 2)
            {
                list.Add(m_hListViewItems[i]);
            }
            foreach (ListViewItem lvi in list)
            {
                m_hListViewItems.Remove(lvi);
            }

            listView1.VirtualListSize = m_hListViewItems.Count;
            listView1.Invalidate();
        }
        //排序
        private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            if (e.Column == mySorter.ColumnIndex)
            {
                mySorter.SortOrder = (
                    mySorter.SortOrder == SortOrder.Descending ?
                    SortOrder.Ascending : SortOrder.Descending);
            }
            else
            {
                mySorter.SortOrder = SortOrder.Ascending;
                mySorter.ColumnIndex = e.Column;
            }

            m_hListViewItems.Sort(mySorter);

            listView1.Invalidate();
        }

    }
}
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace ListviewVirtualTest
{
    public class MySorter : System.Collections.Generic.IComparer<ListViewItem>
    {
        public SortOrder SortOrder = SortOrder.None;
        public int ColumnIndex = -1;

        IComparer  成员#region IComparer<ListViewItem> 成员

        public int Compare(ListViewItem x, ListViewItem y)
        {
            ListViewItem hLeft = x;
            ListViewItem hRiht = y;

            if (SortOrder == SortOrder.Ascending && (ColumnIndex >= 0) && (ColumnIndex < hLeft.SubItems.Count))
            {
                string sx = hLeft.SubItems[ColumnIndex].Text;
                string sy = hRiht.SubItems[ColumnIndex].Text;
                return sx.CompareTo(sy);
            }
            if (SortOrder == SortOrder.Descending && (ColumnIndex >= 0) && (ColumnIndex < hLeft.SubItems.Count))
            {
                string sx = hLeft.SubItems[ColumnIndex].Text;
                string sy = hRiht.SubItems[ColumnIndex].Text;
                return sy.CompareTo(sx);
            }
            return 0;
        }

        #endregion
    }
}

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace ListviewVirtualTest
{
    static class Program
    {
        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form2());
        }
    }
}

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该日志于2010-02-02 00:59由 admin 发表在编程分类下， 你可以发表评论。除了可以将这个日志以保留源地址及作者的情况下引用到你的网站或博客，还可以通过RSS 2.0订阅这个日志的所有评论。
目前盖楼 (2)层：
  1. COFFEYLILLIE21 说：
    2010-08-09于4:18 下午

    Make your own life more easy take the loan and everything you want.

    回复
  2. imiche-online 说：
    2010-07-02于12:17 下午

    Yes, probably so it is

    回复

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