具有来自Dictionary<；字符串>；，列表<；字符串>>；

本文关键字：gt 字符串 lt 列表 Dictionary | 更新日期: 2023-09-27 18:25:28

我有两个commboBoxes，代码如下：

  Dictionary<string, List<string>> dict = new Dictionary<string, List<string>>()
        {
            { "A", new List<string> { "A1", "A2", "A3", "A4", "A5" }},
            { "B", new List<string> { "B1", "B2", "B3", "B4", "B5" }},
            { "C", new List<string> { "C1", "C2", "C3", "C4", "C5" }},
        };
        comboBox1.DataSource = dict.ToList();
        comboBox1.DisplayMember = "Key";

当我从组合框1中选择"A"时，是否可以显示组合框2的值（"A1"、"A2"、"A3"、"A4"、"A5"）？

具有来自Dictionary<；字符串>；，列表<；字符串>>；

没有太多事情要做。答案已经很长了。Bt我们不会需要那么多。这是代码：

Dictionary<string, List<string>> dict;       
    private void Form1_Load(object sender, EventArgs e)
    {
        dict = new Dictionary<string, List<string>>()
        {
            { "A", new List<string> { "A1", "A2", "A3", "A4", "A5" }},
            { "B", new List<string> { "B1", "B2", "B3", "B4", "B5" }},
            { "C", new List<string> { "C1", "C2", "C3", "C4", "C5" }},
        };
        cb1.DisplayMember = "Key";
        cb1.DataSource = dict.ToList();
    }
    private void cb1_SelectedIndexChanged(object sender, EventArgs e)
    {                      
            cb2.DataSource = dict[cb1.Text];              
    }

修改是正确的：首先设置DisplayMember，然后设置数据源。

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