Adding Text and Value to ComboBox

ComboBox text and value - C# , VB.Net

The following program demonstrates how to add Text and Value to an Item of a ComboBox without using any Binding DataSource.

Add combobox items with different text and value in C# , VB.Net

In order to add Text and Value, here using a Dictionary Object to store text and values.

C#

Dictionary<string, string> comboSource = new Dictionary<string, string>();
comboSource.Add("1", "Sunday");
comboSource.Add("2", "Monday");

VB.Net

Dim comboSource As New Dictionary(Of String, String)()
comboSource.Add("1", "Sunday")
comboSource.Add("2", "Monday")

How To Add (Item and Value) Into ComboBox

After adding items to the Dictionary, next step is to set this Dictionary Object as a DataSource in the Combobox

C#

comboBox1.DataSource = new BindingSource(comboSource, null);
comboBox1.DisplayMember = "Value";
comboBox1.ValueMember = "Key";

VB.Net

ComboBox1.DataSource = New BindingSource(comboSource, Nothing)
ComboBox1.DisplayMember = "Value"
ComboBox1.ValueMember = "Key"

How to add Text and Value in combobox

Now the first part is over, next is to retrieve these keys and values from the Combobox.

C#

string key = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Key;
string value = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Value;

VB.Net

Dim key As String = DirectCast(ComboBox1.SelectedItem, KeyValuePair(Of String, String)).Key
Dim value As String = DirectCast(ComboBox1.SelectedItem, KeyValuePair(Of String, String)).Value

Source Code | C#

using System;
using System.Collections.Generic;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
      Dictionary<string, string> comboSource = new Dictionary<string, string>();
      comboSource.Add("1", "Sunday");
      comboSource.Add("2", "Monday");
      comboSource.Add("3", "Tuesday");
      comboSource.Add("4", "Wednesday");
      comboSource.Add("5", "Thursday");
      comboSource.Add("6", "Friday");
      comboSource.Add("7", "Saturday");
      comboBox1.DataSource = new BindingSource(comboSource, null);
      comboBox1.DisplayMember = "Value";
      comboBox1.ValueMember = "Key";
    }
    private void button1_Click(object sender, EventArgs e)
    {
      string key = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Key;
      string value = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Value;
      MessageBox.Show(key +  "   " + value);
    }
  }
}

Source Code | Vb.Net

Public Class Form1
  Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim comboSource As New Dictionary(Of String, String)()
    comboSource.Add("1", "Sunday")
    comboSource.Add("2", "Monday")
    comboSource.Add("3", "Tuesday")
    comboSource.Add("4", "Wednesday")
    comboSource.Add("5", "Thursday")
    comboSource.Add("6", "Friday")
    comboSource.Add("7", "Saturday")
    ComboBox1.DataSource = New BindingSource(comboSource, Nothing)
    ComboBox1.DisplayMember = "Value"
    ComboBox1.ValueMember = "Key"
  End Sub
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim key As String = DirectCast(ComboBox1.SelectedItem, KeyValuePair(Of String, String)).Key
    Dim value As String = DirectCast(ComboBox1.SelectedItem, KeyValuePair(Of String, String)).Value
    MessageBox.Show(key & "   " & value)
  End Sub
End Class

Autocomplete ComboBox

From the version Visual Studio 2005, some of the controls support Autocomplete feature including the ComboBox controls. From the following link you can see how to make .... Autocomplete ComboBox

ComboBox Control

A ComboBox displays a text box combined with a ListBox, which enables the user to select items from the list or enter a new value. You can learn more operations in ComboBox from the following link

C# ComboBox VB.Net ComboBox

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