Solved

How to get select value from listbox / Silverligh4

Posted on 2010-09-14
7
486 Views
Last Modified: 2013-11-12
How  can I get the selected value from listbox.
I tried listBox1.SelectedItem, listBox1.SelectedValue, but it is not the right way.
Thanks.


 <ListBox Height="100" HorizontalAlignment="Left" Margin="21,266,0,0"      Name="listBox1" VerticalAlignment="Top" Width="556">
            <ListBoxItem Content="One" />
            <ListBoxItem Content="Two" />
            <ListBoxItem Content="Three" IsEnabled="False" />
        </ListBox>

 private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var x = listBox1.SelectedItem;
            var y = listBox1.SelectedValue;
        }

0
Comment
Question by:Plexo
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 9

Expert Comment

by:TonyReba
ID: 33678764
What Error is it giving? What is displayed?
0
 
LVL 10

Expert Comment

by:joriszwaenepoel
ID: 33679364
I'm not sure, but maybe this could work:

var x = DirectCast(listBox1.SelectedItem, ListBoxItem).Content.ToString();
0
 
LVL 29

Expert Comment

by:Gautham Janardhan
ID: 33679994
see a sample to for the WPF list box.
as far as possible everything should be done using bindings in WPF/Silverlight.
<ListBox ItemsSource="{Binding ListBoxItems}" SelectedItem="{Binding SelectedItem}" SelectionChanged="ListBox_SelectionChanged">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Content}"/>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

// code behind

public partial class Window2 : Window
    {
        DataContext context;
        public Window2()
        {
            InitializeComponent();
            context = new DataContext();
            this.DataContext = context;
        }

        private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            MessageBox.Show("Selected item is : " + context.SelectedItem.Content);
        }
    }

    public class DataContext
    {
        public ObservableCollection<Item> ListBoxItems { get; set; }
        public Item SelectedItem { get; set; }
        public DataContext()
        {
            ListBoxItems = new ObservableCollection<Item>();
            ListBoxItems.Add(new Item()
            {
                Content = "Test 1"
            });

            ListBoxItems.Add(new Item()
            {
                Content = "Test 2"
            });

            ListBoxItems.Add(new Item()
            {
                Content = "Test 3"
            });

            ListBoxItems.Add(new Item()
            {
                Content = "Test 4"
            });
        }
    }

    public class Item
    {
        public string Content { get; set; }
    }

Open in new window

0
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

 

Author Comment

by:Plexo
ID: 33683929
Hi TonyReba
There's no mistake, I just can not get the contents.
Thanks.
0
 

Author Comment

by:Plexo
ID: 33683988
Hi joriszwaenepoel

var x = DirectCast(listBox1.SelectedItem, ListBoxItem).Content.ToString();
I used your code and I had the following error:

Error      1      The name 'DirectCast' does not exist in the current context
Error      2      'System.Windows.Controls.ListBoxItem' is a 'type' but is used like a 'variable'
0
 
LVL 9

Expert Comment

by:TonyReba
ID: 33684466
I'm not too good on c# but try, .        

Dim x as listboxitem = ctype (listbox1.selectedvalue, listboxitem).tostring()

 Then use x as your variable.

Note Google telerik code converter if u need convert to c #  this is vb                          
0
 
LVL 29

Accepted Solution

by:
Gautham Janardhan earned 500 total points
ID: 33685100
in C# that would be

((ListBoxItem)listBox1.SelectedItem).Content.Tostring()
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
For most people, the WrapPanel seems like a magic when they switch from WinForms to WPF. Most of us will think that the code that is used to write a control like that would be difficult. However, most of the work is done by the WPF engine, and the W…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question