C# 搜索列表框

C# Searching a listBox(C# 搜索列表框)

问题描述

我在一个名为 listBox1 的列表框中有大量项目.我在顶部还有一个文本框(textBox1).我希望能够在 textBox 中输入内容，listBox 会搜索它的项目并找到包含我正在输入的内容的项目.

I have a large amount of items in a listBox called listBox1. I also have a textBox (textBox1) at the top. I want to be able to type into the textBox and the listBox searches through it's item's and finds ones that contain what I am typing.

例如，说 listBox 包含

For example, say the listBox contains

猫"

狗"

胡萝卜"

和花椰菜"

如果我开始输入字母 C，那么我希望它同时显示 Cat 和 Carrot，当我输入 a 时它应该继续显示它们，但是当我添加一个 r 时它应该从列表中删除 Cat.有没有办法做到这一点?

If I start typing the letter C, then I want it to show both Cat and Carrot, when I type a it should keep showing them both, but when I add an r it should remove Cat from the list. Is there anyway to do this?

推荐答案

过滤列表框.试试这个:

Filter the listbox. Try this:

    List<string> items = new List<string>();
    private void Form1_Load(object sender, EventArgs e)
    {
        items.AddRange(new string[] {"Cat", "Dog", "Carrots", "Brocolli"});

        foreach (string str in items) 
        {
            listBox1.Items.Add(str); 
        }
    }

    private void textBox1_TextChanged(object sender, EventArgs e)
    {
        listBox1.Items.Clear();

        foreach (string str in items) 
        {
            if (str.StartsWith(textBox1.Text, StringComparison.CurrentCultureIgnoreCase))
            {
                listBox1.Items.Add(str);
            }
        }
    }

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