How to add two separate columns value as list to one combo box

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I have two Columns contain Separate Value i want to show both of them in one combo box as dropdown list

What I have tried:

VB.NET

Dim cmd As New SqlCommand("  select * from tbl1 where ID   = @ID", con)
cmd.Parameters.AddWithValue("@ID", TextID.Text)
Dim DataAdopter = New SqlDataAdapter(cmd)
Dim dt As New DataTable
DataAdopter.Fill(dt)
ComboProductType.DataSource = dt
If dt.Rows.Count > 0 Then


    ComboProductType.DisplayMember = "Mango"
    ComboProductType.DisplatMember = "Orange"

Posted 18-Oct-21 7:16am

Member 14649324

Updated 18-Oct-21 22:02pm

Richard Deeming

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Maciej Los 18-Oct-21 15:07pm

Sorry, but your question is not clear. Please, be more specific.

Member 14649324 18-Oct-21 15:20pm

I have a table that contain two columns one columns have for example fruits like Apple Orange Manago and one columns contain vegtables Carrot Tomato,Onion now want combine these two columns values and show as drop downn list in combobox like
Mango
Orange
Tomato
Onion

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Richard Deeming · Accepted Answer · 2021-10-18T22:02:00

If you want to combine the values from two columns into a single list, use a UNION query.