C#搜索列表框 [英] C# Searching a listBox

问题描述

我在名为listBox1的listBox中有大量项目.我在顶部也有一个textBox(textBox1).我希望能够在textBox中键入内容，并且listBox可以搜索该项目的内容，并找到包含我所键入内容的内容.

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"Brocolli"

and "Brocolli"

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r时，它应该从列表中删除Cat.反正有这样做吗?

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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