Populate (Bind) DataList from multiple tables with Join query using C# and VB.Net in ASP.Net

Hi Niwaha,

Check this sample now take its reference and correct your code.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

HTML

<asp:DataList runat="server" ID="dlCustomers">
    <HeaderTemplate>
        <table>
            <tr>
                <td>Name</td>
                <td>Id</td>
                <td>Price</td>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><asp:Label Text='<%# Eval("ContactName") %>' runat="server" /></td>
            <td><asp:Label Text='<%# Eval("OrderID") %>' runat="server" /></td>
            <td><asp:Label Text='<%# Eval("Freight") %>' runat="server" /></td>
        </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:DataList>

Namespace

C#

using System.Configuration;
using System.Data;
using System.Data.SqlClient;

VB.Net

Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.Page.IsPostBack)
    {
        using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conString"].ConnectionString))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT TOP 10 C.ContactName,O.OrderID,O.Freight FROM Customers C INNER JOIN Orders O ON C.CustomerID = O.CustomerID", con))
            {
                cmd.CommandType = CommandType.Text;
                using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                {
                    DataTable dt = new DataTable();
                    sda.Fill(dt);
                    this.dlCustomers.DataSource = dt;
                    this.dlCustomers.DataBind();
                }
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.Page.IsPostBack Then
        Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("conString").ConnectionString)
            Using cmd As SqlCommand = New SqlCommand("SELECT TOP 10 C.ContactName,O.OrderID,O.Freight FROM Customers C INNER JOIN Orders O ON C.CustomerID = O.CustomerID", con)
                cmd.CommandType = CommandType.Text
                Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
                    Dim dt As DataTable = New DataTable()
                    sda.Fill(dt)
                    Me.dlCustomers.DataSource = dt
                    Me.dlCustomers.DataBind()
                End Using
            End Using
        End Using
    End If
End Sub

Screenshot