How to get selected text in combobox.

Question

WPF form has ComboBox where null value associated text "-- Please select --".
I tryed ComboBox1.Text. It gives wrong value.

How to extract selected text from selected combobox item?

Thanks.

Answer 1

You can use ComboBoxItem.Content to get the selected text.Here is my demo:

  <ComboBox Name="MyCombobox1" Width="120" Height="30" SelectionChanged="MyCombobox1_SelectionChanged">  
                    <ComboBoxItem Content="item1" Tag="tag1"></ComboBoxItem>  
                    <ComboBoxItem Content="item2" Tag="tag2"></ComboBoxItem>  
                    <ComboBoxItem Content="item3" Tag="tag3"></ComboBoxItem>  
                    <ComboBoxItem Content="item4" Tag="tag4"></ComboBoxItem>  
     </ComboBox>   

The event code is:

private void MyCombobox1_SelectionChanged(object sender, SelectionChangedEventArgs e)  
        {  
            if(MyCombobox1.SelectedItem!=null)  
            {  
                //ComboBoxItem cbi1 = (ComboBoxItem)(sender as ComboBox).SelectedItem;  
                ComboBoxItem cbi = (ComboBoxItem)MyCombobox1.SelectedItem;  
                string selectedText = cbi.Content.ToString();  
            }  
        }  

If you use ComboBox with binding data, like below shown:

 <ComboBox Name="MyCombobox2" FlowDirection="LeftToRight" DisplayMemberPath="Name" SelectedValuePath="ID" Width="120" Height="30" SelectionChanged="MyCombobox2_SelectionChanged"></ComboBox>  

And bind data using code like this:

 public class City  
        {  
            public int ID { get; set; }  
            public string Name { get; set; }  
        }  
        public MainWindow()  
        {  
            InitializeComponent();  
            List<City> list = new List<City>();  
            list.Add(new City { ID = 1, Name = "City1" });  
            list.Add(new City { ID = 2, Name = "City2" });  
            list.Add(new City { ID = 3, Name = "City3" });  
            MyCombobox2.ItemsSource = list;  
            MyCombobox2.SelectedIndex = 0;  
        }  

You can use the below event to get the selected test:

 private void MyCombobox2_SelectionChanged(object sender, SelectionChangedEventArgs e)  
        {  
            if (MyCombobox2.SelectedItem != null)  
            {  
                string strID =  MyCombobox2.SelectedValue.ToString();  
                string strName = ((City)MyCombobox2.SelectedItem).Name.ToString();  
            }  
             
        }  

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Answer 2

Hi DaisyTian-MSFT. Thanks for try to help.
That is XAML of ComboBox

    <ComboBox x:Name="EmployeeComboBox" Margin="235 0 0 0" FontSize="14" Width="265" Height="25" ToolTip="Employee" SelectionChanged="EmployeeComboBox_SelectionChanged" 
        IsSynchronizedWithCurrentItem="True" IsEditable="True" IsReadOnly="True" Style="{StaticResource ST_FlatComboBox}" TabIndex="0"
        DisplayMemberPath="Name" SelectedValuePath="Id">
        <ComboBox.SelectedValue>
            <Binding Path="Id" NotifyOnValidationError="True" Mode="TwoWay">
                <Binding.ValidationRules>
                    <local:ValidateComboBox ObjectType="String" />
                </Binding.ValidationRules>
            </Binding>
        </ComboBox.SelectedValue>
    </ComboBox>
</StackPanel>

Thanks.