搜索包含字符串的项目的列表框

背景 ：我正在构建一个数据库应用程序来存储有关我的大量电影collections的信息。 列表框包含数百个项目，因此我决定实现一个搜索function，该function将突出显示包含特定字符串的所有项目。 有时很难记住整部​​电影的标题，所以我认为这会派上用场。

我在Microsoft网站上发现了这个有用的代码，它突出显示了包含特定字符串的列表框中的所有项目。 如何修改它以完全搜索每个字符串？

目前，代码仅搜索以搜索字符串开头的项目，而不是查看它是否包含其他任何地方的搜索字符串。 我在Google上遇到了一个listbox.items.contains（）方法，虽然我不知道如何为它转换我的代码。

http://forums.asp.net/t/1094277.aspx/1

private void FindAllOfMyString(string searchString) { // Set the SelectionMode property of the ListBox to select multiple items. listBox1.SelectionMode = SelectionMode.MultiExtended; // Set our intial index variable to -1. int x =-1; // If the search string is empty exit. if (searchString.Length != 0) { // Loop through and find each item that matches the search string. do { // Retrieve the item based on the previous index found. Starts with -1 which searches start. x = listBox1.FindString(searchString, x); // If no item is found that matches exit. if (x != -1) { // Since the FindString loops infinitely, determine if we found first item again and exit. if (listBox1.SelectedIndices.Count > 0) { if(x == listBox1.SelectedIndices[0]) return; } // Select the item in the ListBox once it is found. listBox1.SetSelected(x,true); } }while(x != -1); } } 

Answer 1

创建自己的搜索function，有点像

 int FindMyStringInList(ListBox lb,string searchString,int startIndex) { for(int i=startIndex;i 

（小心，我在没有编译或测试的情况下写出了这个，代码可能包含错误，但我想你会得到这个想法!!!）

Answer 2

使用String.IndexOf对ListBox中的每个项目进行不区分大小写的字符串搜索：

 private void FindAllOfMyString(string searchString) { for (int i = 0; i < listBox1.Items.Count; i++) { if (listBox1.Items[i].ToString().IndexOf(searchString, StringComparison.OrdinalIgnoreCase) >= 0) { listBox1.SetSelected(i, true); } else { // Do this if you want to select in the ListBox only the results of the latest search. listBox1.SetSelected(i, false); } } } 

我还建议您在Winform设计器或表单构造函数方法中设置ListBox的SelectionMode属性。

Answer 3

我不确定你发布的代码，但我写了一个小方法来做你正在寻找的东西。 这非常简单：

  private void button1_Click(object sender, EventArgs e) { listBox1.SelectionMode = SelectionMode.MultiSimple; IEnumerable items = listBox1.Items; List indices = new List(); foreach (var item in items) { string movieName = item as string; if ((!string.IsNullOrEmpty(movieName)) && movieName.Contains(searchString)) { indices.Add(listBox1.Items.IndexOf(item)); } } indices.ForEach(index => listBox1.SelectedIndices.Add(index)); } 

Answer 4

下面怎么样 你只需要改进一下

  using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public class Item { public Item(string id,string desc) { id = id; Desc = desc; } public string Id { get; set; } public string Desc { get; set; } } public partial class Form1 : Form { public const string Searchtext="o"; public Form1() { InitializeComponent(); listBox1.SelectionMode = SelectionMode.MultiExtended; } public static List GetItems() { return new List() { new Item("1","One"), new Item("2","Two"), new Item("3","Three"), new Item("4","Four") }; } private void Form1_Load(object sender, EventArgs e) { listBox1.DataSource = GetItems(); listBox1.DisplayMember = "Desc"; listBox1.ValueMember = "Id"; listBox1.ClearSelected(); listBox1.Items.Cast() .ToList() .Where(x => x.Desc.Contains("o")).ToList() .ForEach(x => listBox1.SetSelected(listBox1.FindString(x.Desc),true)); } } } 

Answer 5

问了同样的问题： 搜索ListBox并在C＃中选择结果

我提出另一个解决方案

1. 不适合列表框> 1000项。

2. 每次迭代都会循环所有项目。

3. 查找并保留最合适的案例。

    // Save last successful match. private int lastMatch = 0; // textBoxSearch - where the user inputs his search text // listBoxSelect - where we searching for text private void textBoxSearch_TextChanged(object sender, EventArgs e) { // Index variable. int x = 0; // Find string or part of it. string match = textBoxSearch.Text; // Examine text box length if (textBoxSearch.Text.Length != 0) { bool found = true; while (found) { if (listBoxSelect.Items.Count == x) { listBoxSelect.SetSelected(lastMatch, true); found = false; } else { listBoxSelect.SetSelected(x, true); match = listBoxSelect.SelectedValue.ToString(); if (match.Contains(textBoxSearch.Text)) { lastMatch = x; found = false; } x++; } } } } 

   // Save last successful match. private int lastMatch = 0; // textBoxSearch - where the user inputs his search text // listBoxSelect - where we searching for text private void textBoxSearch_TextChanged(object sender, EventArgs e) { // Index variable. int x = 0; // Find string or part of it. string match = textBoxSearch.Text; // Examine text box length if (textBoxSearch.Text.Length != 0) { bool found = true; while (found) { if (listBoxSelect.Items.Count == x) { listBoxSelect.SetSelected(lastMatch, true); found = false; } else { listBoxSelect.SetSelected(x, true); match = listBoxSelect.SelectedValue.ToString(); if (match.Contains(textBoxSearch.Text)) { lastMatch = x; found = false; } x++; } } } }

希望这有帮助！

Answer 6

只是一个class轮

  if(LISTBOX.Items.Contains(LISTBOX.Items.FindByText("anystring"))) //string found else //string not found 

：） 问候