Display Multiple Columns Into ComboBox From Database Table in C#

Introduction

In this article I explain how to bind multiple column values into a ComboBox. It is very simple but I have often bound a single column in a ComboBox so it was a bit of a curiosity for me.

Use the following procedure to bind to a combo box.

Step 1

Open a Windows Forms application and insert a ComboBox and a button control on the form from the toolbox.

Step 2

Now write the simple C# code to bind the ComboBox with multiple columns.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Data.SqlClient;

namespace insert_image_in_database

{

public partial class Form5 : Form

{

public Form5()

{

InitializeComponent();

}

SqlCommand cmd;

SqlConnection con;

SqlDataAdapter da;

DataSet ds;

private void button1_Click(object sender, EventArgs e)

{

con = new SqlConnection("Data Source=MCNDESKTOP03;Initial Catalog=pulkit;User ID=sa;Password=wintellect@123");

cmd =new SqlCommand ("select * from emp", con);

da = new SqlDataAdapter(cmd);

DataSet ds = new DataSet();

da.Fill(ds);

for (int i = 0; i < ds.Tables[0].Rows.Count; i++)

{

comboBox1.Items.Add(ds.Tables[0].Rows[i][0] + " " + ds.Tables[0].Rows[i][1] + " " + ds.Tables[0].Rows[i][2]);

}

}

}

}

Step 3

Now run your application and click on the button then see the ComboBox filled with multiple column values.