组合框的元素过滤 [英] Combobox's elements filtering

问题描述

我有combobox1和comboox2，在combobox1中，我的元素是A，B，C和combobox2 1,2,3,4,5,6 ...

当我选择"A"时，相关的1、2、3和B相关的3,4和C相关的5,6.我只想看1,2,3;选取[时; B"只需3,4等.

我怎么能想象呢?

我尝试在选定的索引中进行更改，但是我没有

I have combobox1 and comboox2 and in combobox1 my elements are A,B,C and combobox2 1,2,3,4,5,6...

A related 1,2,3 and B related 3,4 and C related 5,6.When I choose "A" I want to see just 1,2,3 ; when select "B" just 3,4 etc.

How can I imagine it ?

I tried to do in selected index changed but I didn''t

推荐答案

您好，

试试这个:

Hello,

Try This:

private void Form1_Load(object sender, EventArgs e)
{            
    comboBox1.Items.AddRange(new string[] { "A", "B", "C" });
    comboBox1.SelectedIndex = -1;
    comboBox2.Items.Clear();
}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    comboBox2.Items.Clear();
    switch (comboBox1.SelectedItem.ToString())
    {
        case "A":
            comboBox2.Items.AddRange(new string[] { "1", "2", "3" });
            break;

        case "B":
            comboBox2.Items.AddRange(new string[] { "3", "4"});        
            break;

        case "C":
            comboBox2.Items.AddRange(new string[] { "5", "6" });    
            break;
        default:
            break;
    }
    comboBox2.SelectedIndex = -1;
}

参加
埃内斯托·法佐洛(Ernesto Fazolo)

Att.
Ernesto Fazolo

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