You want to get code value so you need to pass a single cID and if you need to pass multiple cID then use GridView or other Data container to show the details.
You can refer this link
http://www.aspforums.net/Threads/154508/Search-GridView-using-multiple-comma-separated-fields-in-ASPNet/
Its in C# and its vb translated code is
Private Sub WhereCondition()
Dim id As String = txtId.Text.Trim()
Dim employeesId As String() = id.Split(","c)
Dim condition As String = String.Empty
For Each item As String In employeesId
condition &= item & Convert.ToString(",")
Next
Dim final As String = condition.Substring(0, condition.Length - 1)
Me.GetEmployees(final)
End Sub
Private Sub GetEmployees(condition As String)
Dim constr As String = ConfigurationManager.ConnectionStrings("conString2").ConnectionString
Dim sqlStatment As String = (Convert.ToString("SELECT LastName,Country FROM Employees WHERE EmployeeID IN(") & condition) & ")"
Using con As New SqlConnection(constr)
Using cmd As New SqlCommand(sqlStatment, con)
Using da As New SqlDataAdapter(cmd)
Dim ds As New DataSet()
da.Fill(ds)
Me.gvEmployees.DataSource = ds
Me.gvEmployees.DataBind()
End Using
End Using
End Using
End Sub
Protected Sub Search(sender As Object, e As EventArgs)
Me.WhereCondition()
End Sub
Image:

Thank You.