问题:

When I run this code my listbox is empty. What is the best way to get data from SQL and into a listbox? When the form is submitted I want to use the CustomreID value data to store into another table and thought using the index would be the best solution.

sSQL = "SELECT CustomerID, Company from Customers Order by Company ASC"

cmd = New SqlCommand(sSQL, moConn)
rs = cmd.ExecuteReader()

While rs.Read
   lsbDestination.Items.Insert(CInt(rs("CustomerID")), rs("Company"))
End While

回答1:

You can easily bind data to a ListBox using the DataSource property of the ListBox. Try something like this (untested):

Dim adapter As New SqlDataAdapter(cmd)
Dim ds As New DataSet
adapter.Fill(ds)

lsbDestination.DataTextField = "Company"
lsbDestination.DataValueField = "CustomerId"
lsbDestination.DataSource = ds.Tables(0)
lsbDestination.DataBind()

Good luck.

回答2:

If you want to add a items to ListBox using While rs.Read.

Using rsAs SqlDataReader = cmd.ExecuteReader()
    While rs.Read()
        Dim items As Object() = {r("CustomerID"), r("Company").ToString()}
        listBox1.Items.Add(items)
    End While
    listBox1.DisplayMember = "Company"
    listBox1.ValueMember = "CustomerID"
End Using

Just let me know if you've encountered some problem.