Question

I am using Microsoft Visual Studio 2010

I have two Combobox.

-Combobox1.Text
-Combobox2.Text

first combobox1 contains the ff: items

-Globe
-Smart
-Sun

Second combobox2 contains the ff items:

-Smart30
-Smart60
-Smart115
-AMAX
-Globe30
-TU20
-TU50
-TU150
-DCTU100

What I want to do is when I click for Globe in ComboBox1.Text -AMAX and -Globe 30 Appears in the second ComboBox2., and for Smart when I clicked it., -Smart30,-Smart60 and -Smart115 appears in ComboBox2.,just like in SUN.,

So is it possible to do this?

Answer 1

You should have to store these data into a Dictionary<string,List<string> and use data-binding technique to assign List<T> to comboBox2 of selected Key of ComboBox1.

Sample:

 Dim data As New Dictionary(Of String, List(Of String))
 data.Add("Select", New List(Of String))
 data.Add("First", New List(Of String) From {"A", "B", "C"})
 data.Add("Second", New List(Of String) From {"P", "Q"})

 ComboBox1.DataSource = data.Keys.ToList()
 AddHandler ComboBox1.SelectedIndexChanged, 
      Sub(sa, ea)
          ComboBox2.DataSource = data(ComboBox1.Text)
      End Sub