ASP.NET - ASP.NET (C# Version) Database Driven Select Menu (Dropdown Menu) : Code Entry

Live Editing Disabled for Server-Side Example

HTML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Load.aspx.cs" Inherits="Load" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <strong>ASP.NET (C# Version) SQL Server Database Driven Dropdown Menu</strong><br />
This demonstration populates a Select Menu with values from a database table.<br />
    <form id="form1" runat="server">
        <div>
            <asp:DropDownList ID="DropDownList1" runat="server">
                
            </asp:DropDownList>
        </div>
    </form>
</body>
</html>

SQL

ASP.NET

<?xml version="1.0"?>
<configuration>
  <connectionStrings configSource="database.config" />
  <system.web>
    <compilation debug="true" strict="false" explicit="true" targetFramework="4.7.2" />
    <httpRuntime targetFramework="4.7.2" />
  </system.web>
</configuration>

<?xml version="1.0"?>
<connectionStrings>
  <add name ="Virtual-Learning" connectionString="Data Source=sqlcorecs-01\sql2019;Database=Virtual-Class-01;User ID=testuser;Password=testuser;MultipleActiveResultSets=True"/>
</connectionStrings>

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

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            string constr = ConfigurationManager.ConnectionStrings["Virtual-Learning"].ConnectionString;
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand("SELECT ddId, ddName FROM Dropdown"))
                {
                    cmd.CommandType = CommandType.Text;
                    cmd.Connection = con;
                    con.Open();
                    DropDownList1.DataSource = cmd.ExecuteReader();
                    DropDownList1.DataTextField = "ddName";
                    DropDownList1.DataValueField = "ddId";
                    DropDownList1.DataBind();
                    con.Close();
                }
            }
            DropDownList1.Items.Insert(0, new ListItem("--Select Programming Language--", "0"));
        }
    }

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