Csharp/C Sharp/Database ADO.net/Data Bind ListBox

Binding database table to ListBox and TextBox, link ListBox and TextBox

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
    public class Form1 : System.Windows.Forms.Form {
      private System.Windows.Forms.ListBox listBox1;
      private System.Windows.Forms.TextBox textBox1;
      private System.Windows.Forms.TextBox textBox2;
      private System.Data.DataSet dataSet1;
      private System.ruponentModel.Container components = null;
      public Form1() {
        InitializeComponent();
      }
      private void InitializeComponent() {
         this.listBox1 = new System.Windows.Forms.ListBox();
         this.textBox1 = new System.Windows.Forms.TextBox();
         this.textBox2 = new System.Windows.Forms.TextBox();
         this.dataSet1 = new System.Data.DataSet();
         ((System.ruponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
         this.SuspendLayout();
         this.listBox1.Location = new System.Drawing.Point(8, 8);
         this.listBox1.Name = "listBox1";
         this.listBox1.Size = new System.Drawing.Size(232, 95);
         this.listBox1.TabIndex = 0;
         this.textBox1.Location = new System.Drawing.Point(8, 120);
         this.textBox1.Name = "textBox1";
         this.textBox1.TabIndex = 1;
         this.textBox1.Text = "textBox1";
         this.textBox2.Location = new System.Drawing.Point(8, 152);
         this.textBox2.Name = "textBox2";
         this.textBox2.TabIndex = 2;
         this.textBox2.Text = "textBox2";
         this.dataSet1.DataSetName = "NewDataSet";
         this.dataSet1.Locale = new System.Globalization.CultureInfo("en-US");
         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         this.ClientSize = new System.Drawing.Size(256, 188);
         this.Controls.Add(this.textBox2);
         this.Controls.Add(this.textBox1);
         this.Controls.Add(this.listBox1);
         this.Name = "Form1";
         this.Text = "Form1";
         this.Load += new System.EventHandler(this.Form1_Load);
         ((System.ruponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
         this.ResumeLayout(false);
      }
      static void Main() {
         Application.Run(new Form1());
      }
      private void Form1_Load(object sender, System.EventArgs e) {
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
  
         string sql = @"select firstname, lastname from employee ";
         SqlConnection conn = new SqlConnection(connString);
         SqlDataAdapter da = new SqlDataAdapter(sql, conn);
         da.Fill(dataSet1, "employee");
         DataTable dt = dataSet1.Tables["employee"];
         listBox1.DataSource = dt;
         listBox1.DisplayMember = "firstname";
         textBox1.DataBindings.Add("text", dt, "firstname");
         textBox2.DataBindings.Add("text", dt, "lastname");
      }
    }

Fill data from Database to ListBox

 

using System;
using System.Diagnostics;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
public class Form1 : System.Windows.Forms.Form {
    SqlConnection cn = new SqlConnection("data source=.;database=biblio;uid=admin;pwd=pw");
    SqlDataAdapter da = new SqlDataAdapter();
    string strSQL = "Select Title, PubID from Titles";
    SqlCommand cmd;
    SqlDataReader Dr;
    System.Windows.Forms.Button Button1 = new System.Windows.Forms.Button();
    System.Windows.Forms.ListBox ListBox1  = new System.Windows.Forms.ListBox();
    System.Windows.Forms.TextBox TextBox1  = new System.Windows.Forms.TextBox();
    public Form1() {
        cmd = new SqlCommand(strSQL, cn);
        this.SuspendLayout();
        this.Button1.Location = new System.Drawing.Point(136, 248);
        this.Button1.Size = new System.Drawing.Size(144, 32);
        this.Button1.Text = "Get Data";
        this.Button1.Click += new System.EventHandler(this.Button1_Click);
        this.ListBox1.Location = new System.Drawing.Point(48, 64);
        this.ListBox1.Size = new System.Drawing.Size(312, 160);
        this.TextBox1.Location = new System.Drawing.Point(48, 24);
        this.TextBox1.Size = new System.Drawing.Size(328, 20);
        this.TextBox1.Text = "Hit";
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(408, 293);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.Button1,
                                                                          this.ListBox1,
                                                                          this.TextBox1});
        this.ResumeLayout(false);
    }
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    private void Button1_Click(object sender, System.EventArgs e) {
        cn.Open(); 
        cmd.rumandText = strSQL + """ + TextBox1.Text + "%"";
        Dr = cmd.ExecuteReader();
        ListBox1.Items.Clear(); 
        ListBox1.BeginUpdate();  
        while (Dr.Read()){
            ListBox1.Items.Add(Dr.GetString(0) + " - " + Dr.GetInt32(1).ToString());
        }
        ListBox1.EndUpdate();  
        Dr.Close();  
    }
}