Make Easy the User's Inputs by the Autocomplete of a ComboBox

One of the nicest features in visual studio controls is the ability to auto compete what we are typing in ComboBox and other controls, that what I will to explain to use it efficiently.

1. Let's create the following UI :


2. Make the following changes :


Set comboBox1 property : AutoCompeteSource  to ListItems

Set comboBox1 property : AutoCompeteMode to SuggestAppend

Fill the  items list of the comboBox1  by : Algeria,Maroco,Tunisia,Egypt,France,Italy,Germany,,India,China


Set comboBox1 property : AutoCompeteSource  to CustomSource
Set comboBox1 property : AutoCompeteMode to SuggestAppend

And leave the items list blank

The code behind the form:

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;


namespace ComboBoxAutoComplete


    public partial class Form1 : Form


        //create a list of strings to use as custom Autocompete source with combobox2

        List<string> customSource = new List<string> { "Algers", "Paris", "Tokyo", "Rome" };


        public Form1()




        private void Form1_Load(object sender, EventArgs e)


            //assign the list to AutoCompleteCustomSource of the combobox2




So what do we have done.

For the  comboBox1  it auto completes from the its list Items using the mode SuggestAppend and it is not necessary to use it you can try the other options.

The comboBox2 uses a string list to auto complete .