组合框中的索引逻辑?

问题描述

我有combobox1和comboox2，在combobox1中，我的元素是A，B，C和combobox2 a，b，c，d，e，f ...并且我使用screeen属性添加了此元素(我的意思是不带代码) .

I have combobox1 and comboox2 and in combobox1 my elements are A,B,C and combobox2 a,b,c,d,e,f...And I added this elements using property screeen(I mean not with code).

combobox1                     combobox2
    -----------------            ----------------
           A                            a
           B                            b
           C                            c
                                        d
                                        e
                                        f
A related a,b,c and B related b,c and C related d,e,f.

当我选择"A"时，我只想看到a，b，c；当选择 B" 只B，C等

我可以给combobox1的项目提供索引号吗?当我选择"A"时，我只想看到"a"，"b"，"c"元素(我的意思是0,1,2负债数)，而当我选择"B"时，我只想看到b，c(我的意思是1,2负债)数字).我想这样做是因为如果没有负债数，我必须与编写代码保持一切联系.我在下面写了一些代码，但是很长的路要走.

When I choose "A" I want to see just a,b,c ; when select "B" just b,c etc.

can I give index number of combobox1''s items ? When I choose "A" I want to see just "a","b","c" elements(I mean 0,1,2 indeks numbers) when choose "B" just b,c (I mean 1,2 indeks numbers). I want to do like that cause if there is no indeks numbers I have to make all relationship with writing codes.I wrote a little code below but it is long way.

Index logic is better, sure if there is index logic in combobox :)

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

        case "B":
           comboBox2.Items.AddRange(new string[] { "b", "c" });
           break;
      }
       comboBox2.SelectedIndex = -1;
   }

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