Question

How to pupolate the Combobox in VB.Net, the items are from DataSet… Here’s my code

Dim LibDSPopulate As New DataSet
        Dim LibDAPopulate As OdbcDataAdapter = New OdbcDataAdapter("SELECT DISTINCT Category FROM tblBooks", LibConn)
        LibDAPopulate.Fill(LibDSPopulate, "tblBooks")

        cmbCategoryF.Items.Add(LibDSPopulate)

Answer 1

You may use Data binding facility.

'Add an empty entry 
Dim dr As DataRow = LibDSPopulate.Tables("tblBooks").NewRow
dr("Category") = "***Select***"
LibDSPopulate.Tables("tblBooks").Rows.InsertAt(dr, 0)

cmbCategoryF.DataSource=LibDSPopulate.Tables("tblBooks")
cmbCategoryF.DisplayMember="Category" 'Name of field
cmbCategoryF.ValueMember="Category"   'Name of field

If you don’t want to use databindng then add each item using Items.Add() method.

 For Each row As DataRow In LibDSPopulate.Tables("tblBooks").Rows
    ComboBox1.Items.Add(row("Category"))
 Next