How to get currently selected ComboBox item in WPF using VB.NET

Introduction

Here in this article I am explaining that how you can get currently selected items in a comboBox on button click. The implementation you need one ComboBox and a Button control. Then you add items in ComboBox, a little code and when you click on Button a Message will display with the Currently selected item of the ComboBox.


Getting Started

• Simply create a new WPF application.
• Drag a ComboBox and a Button Control on Main Window. Your window will look like below.
  
  
  
  
• Your MainWindow.xaml page will look like below.
  
  <Window x:Class="MainWindow"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="MainWindow" Height="300" Width="277">
  <StackPanel>
  <ComboBox Name="comboBox" IsEditable="True" Margin="5"
  SelectionChanged="ComboBox_SelectionChanged">
  <ComboBoxItem Content="ComboBox Item 1" Selected="ComboBoxItem_Selected" />
  <ComboBoxItem Content="ComboBox Item 2" Selected="ComboBoxItem_Selected" />
  <ComboBoxItem Content="ComboBox Item 3" Selected="ComboBoxItem_Selected" IsSelected="True"/>
  <ComboBoxItem Content="ComboBox Item 4" Selected="ComboBoxItem_Selected" />
  <ComboBoxItem Content="ComboBox Item 5" Selected="ComboBoxItem_Selected" />
  </ComboBox>
  <Button Content="Show Selected Item" Margin="5" Width="100" Click="Button_Click" Name="btnSelect"
  />
  </StackPanel>
  </Window>
  
• Then add the below code in code behind file.
  
  Private Sub btnSelect_Click(sender As Object, e As RoutedEventArgs)
  Dim listitem As ComboBoxItem = TryCast(comboBox.SelectedItem, ComboBoxItem)
  If listitem IsNot Nothing Then
  MessageBox.Show("present Current items in list: " & Convert.ToString(listitem.Content),
  Title)
  ElseIf Not [String].IsNullOrEmpty(comboBox.Text) Then
  MessageBox.Show("Enterde Text: " + comboBox.Text, Title)
  End If
  End Sub
  Private Sub ComboBox_SelectionChanged(sender As Object, e As SelectionChangedEventArgs)
  If Not IsInitialized Then
  Return
  End If
  Dim listitem As ComboBoxItem = TryCast(comboBox.SelectedItem, ComboBoxItem)
  If listitem IsNot Nothing Then
  MessageBox.Show("Selected item: " & Convert.ToString(listitem.Content), Title) End If
  End Sub
  Private Sub ComboBoxItem_Selected(sender As Object, e As RoutedEventArgs)
  If Not IsInitialized Then
  Return
  End If
  Dim listitem As ComboBoxItem = TryCast(e.OriginalSource, ComboBoxItem)
  If listitem IsNot Nothing Then
  MessageBox.Show(Convert.ToString(listitem.Content) & " was selected.", Title)
  End If
  End Sub
  
• Now run your application.
  
  

Output:-





Summary