ListView使用缓存避免数据更新闪屏

2016-02-24 09:58:34 访问(2016) 赞(0) 踩(0)

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

namespace ListViewTest
{
    public class DoubleBufferListView : ListView
    {
        public DoubleBufferListView()
        {
            SetStyle(ControlStyles.DoubleBuffer 
                | ControlStyles.OptimizedDoubleBuffer 
                | ControlStyles.AllPaintingInWmPaint, 
                true);

            UpdateStyles();
        }
    }

}

 public FormUsedBuffer()
        {
            InitializeComponent();

            //宽度和高度值必须大于等于1且不超过256  
            ImageList iList = new ImageList();
            iList.ImageSize = new Size(1, 24);

            //这样的结果在第一列的前面多出了1个分量的宽，所有行的高度为24  
            this.listView1.SmallImageList = iList; 

            InitData();
        }

        protected void InitData()
        {
            ListView 
                lv = listView1;

            int colCount = lv.Columns.Count;
            string[] sA = new string[colCount];

            for (int i = 0; i < 100; ++i)
            {
                sA = new string[colCount];

                for (int j = 0; j < colCount; ++j)
                {
                    sA[j] = i.ToString() + " - " + j.ToString() + ":" + DateTime.Now.ToString();
                }

                ListViewItem item = new ListViewItem(sA);
                lv.Items.Add(item);

                item.UseItemStyleForSubItems = false;

                item.SubItems[(i % colCount)].ForeColor = System.Drawing.Color.Red;
            }

            toolStripLabel_操作结果.Text = "初始化ListView：" + DateTime.Now.ToString("HH:mm:ss");
           
        }

        protected void ChangeData(bool isAll)
        {
            ListView
                lv = listView1;
 

            int colCount = lv.Columns.Count;
            ListViewItem item = null;

            int mod = 0;

            for (int i = 0; i < 100; ++i)
            {
                item = lv.Items[i];

                mod = (i % colCount);

                for (int j = 0; j < colCount; ++j)
                {
                    if (mod == j)
                    {
                        item.SubItems[j].Text
                            =
                            i.ToString() + " - " + j.ToString() + ":" + DateTime.Now.ToString();
                    }
                    else
                    {
                        if (isAll)
                        {


                            item.SubItems[j].Text
                                =
                                item.SubItems[j].Text; 
                        }
                    }
                }


            }
 

            toolStripLabel_操作结果.Text = "点击按钮操作完成：" + DateTime.Now.ToString("HH:mm:ss");
        }

        private void toolStripButton_只改动_Click(object sender, EventArgs e)
        {
            ChangeData(false);
        }

        private void toolStripButton_全部数据_Click(object sender, EventArgs e)
        {
            ChangeData(true);
        }