实例介绍
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; namespace Demo { public partial class Demo : Form { public Demo() { InitializeComponent(); } /// <summary> /// 始发站 文本框 键盘按下松开事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static TextBox txtStation_Name, txtStation_Value; private static ListBox ltb_Stations; /// <summary> /// 站点文本框 键盘按下松开事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void txtStation_KeyUp(object sender, KeyEventArgs e) { TextBox eObj = sender as TextBox; //事件源对象 txtStation_Name = eObj; //当前事件出发对象 if (eObj.Name == "txtStation_S_Name") { txtStation_Value = this.txtStation_S_Value; //保存值的textbox ltb_Stations = this.lb_Start_Stations; //始发站 展示数据的 } else { //到站 控件 txtStation_Value = this.txtStation_E_Value; //保存值的textbox ltb_Stations = this.lb_End_Stations; //始发站 展示数据的 } //上下左右 if (e.KeyCode == Keys.Up || e.KeyCode == Keys.Left) { if (ltb_Stations.SelectedIndex > 0) ltb_Stations.SelectedIndex--; } else if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Right) { if (ltb_Stations.SelectedIndex < ltb_Stations.Items.Count - 1) ltb_Stations.SelectedIndex ; } //回车 else if (e.KeyCode == Keys.Enter) { StationInfo info = ltb_Stations.SelectedItem as StationInfo; txtStation_Name.Text = info.StationName_CN; txtStation_Value.Text = info.StationValue; ltb_Stations.Visible = false; } else { if (txtStation_Name.Text != "") { IList<StationInfo> dataSource = StationInfo.GetStations(txtStation_Name.Text.Trim()); if (dataSource.Count > 0) { ltb_Stations.DataSource = dataSource; ltb_Stations.DisplayMember = "StationName_CN"; ltb_Stations.ValueMember = "StationValue"; ltb_Stations.Visible = true; } else ltb_Stations.Visible = false; } else { ltb_Stations.Visible = false; } } txtStation_Name.Select(txtStation_Name.Text.Length, 1); //光标定位到文本框最后 } /// <summary> /// 展示站点列表的listbox的点击事件,为了给textbox赋值 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ListBox_StationDatas_Click(object sender, EventArgs e) { ListBox eObj = sender as ListBox; StationInfo info = eObj.SelectedItem as StationInfo; txtStation_Name.Text = info.StationName_CN; txtStation_Value.Text = info.StationValue; eObj.Visible = false; txtStation_Name.Select(txtStation_Name.Text.Length, 1); //光标定位到最后 } /// <summary> /// 展示站点列表的listbox, 鼠标在该控件上移动事件, /// 为了鼠标移动选项 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ListBox_StationDatas_MouseMove(object sender, MouseEventArgs e) { ListBox eObj = sender as ListBox; eObj.SelectedIndex = eObj.IndexFromPoint(e.Location); } /// <summary> /// 展示站点列表的listbox, 各项绘制,为了 可以调整 Item的高度 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ListBox_StationDatas_DrawItem(object sender, DrawItemEventArgs e) { e.DrawBackground(); e.DrawFocusRectangle(); StationInfo info = (sender as ListBox).Items[e.Index] as StationInfo; e.Graphics.DrawString(info.StationName_CN, e.Font, new SolidBrush(e.ForeColor), e.Bounds); } private void txtStation_S_Name_Enter(object sender, EventArgs e) { lb_Start_Stations.Visible = false; lb_End_Stations.Visible = false; } } /// <summary> /// 站点信息 /// </summary> public class StationInfo { /// <summary> /// 站点名称 - 中文 /// </summary> public string StationName_CN { get; set; } /// <summary> /// 站点名称 - 英文 /// </summary> public string StationName_EN { get; set; } /// <summary> /// 站点名称 - 简写 /// </summary> public string StationName_JX { get; set; } /// <summary> /// 站点的值 /// </summary> public string StationValue { get; set; } /// <summary> /// 模糊查询站点 /// </summary> /// <param name="filter"></param> /// <returns></returns> private static IList<StationInfo> StationData; public static IList<StationInfo> GetStations(string filter) { IList<StationInfo> results = new List<StationInfo>(); if (StationData == null) { string stations = GetAllStations(); string[] datas = stations.Split('@'); foreach (var item in datas) { string[] tempArray = item.Split('|'); StationInfo info = new StationInfo() { StationName_CN = tempArray[0], StationValue = tempArray[1], StationName_EN = tempArray[2], StationName_JX = tempArray[3] }; results.Add(info); } StationData = results; } else { results = StationData; } return results.Where( f => (f.StationName_CN.Length >= filter.Length && f.StationName_CN.Substring(0, filter.Length) == filter) || (f.StationName_EN.Length >= filter.Length && f.StationName_EN.Substring(0, filter.Length) == filter) || (f.StationName_JX.Length >= filter.Length && f.StationName_JX.Substring(0, filter.Length) == filter) || (f.StationValue.Length >= filter.Length && f.StationValue.Substring(0, filter.Length) == filter)).ToList<StationInfo>(); } /// <summary> /// 读取站点数据文件 /// </summary> /// <returns></returns> public static string GetAllStations() { string stationStrs; try { FileStream fileStream = new FileStream(@"Resource\station_data.txt", FileMode.Open); StreamReader sr = new StreamReader(fileStream, UnicodeEncoding.GetEncoding("GB2312")); stationStrs = sr.ReadToEnd().TrimEnd('@'); sr.Close(); fileStream.Close(); return stationStrs; } catch (IOException ex) { return "站点文件读取失败!"; } } } }
标签: winform C# AutoComplete
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