A sample code to populate the data from two different tables in a dropdown - Create two database tables : tb_India , tb_USA
- Fields in tb_India : tb_India_id, tb_India_City , tb_India_State
- Fields in tb_USA : tb_USA_id, tb_USA_City , tb_USA_State
- The demonstration shows how to bind the dropdownlist with the cities in both the tables
| Step 1: main.aspx <asp:DropDownList id= "DropDownList1" style= "Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" runat="server"></asp:DropDownList> | Step 2: main.aspx.vb Dim myconnection As New SqlClient.SqlConnection("Server=localhost;uid=sa;password=;database=northwind;") Dim myda As New SqlClient.SqlDataAdapter("Select * from tb_USA", myconnection) Dim ds As New DataSet() myda.Fill(ds, "tb_USA") myda.SelectCommand.CommandText = "Select * from tb_India" myda.Fill(ds, "tb_India") Dim i, j As Integer Dim dc As DataColumn Dim mystrval As String Dim dt As DataTable Dim dr As DataRow For Each dt In ds.Tables For i = 0 To dt.Rows.Count - 1 For Each dc In dt.Columns Select Case dc.ColumnName Case "tb_USA_City" mystrval = mystrval & dt.Rows(i)(dc.ColumnName).ToString Case "tb_India_City" mystrval = mystrval & dt.Rows(i)(dc.ColumnName).ToString End Select Next DropDownList1.Items.Add(mystrval) mystrval = "" Next Next |
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