checklist box in WPF

Question

0.00/5 (No votes)

See more:

on click of add button i want to add item in check list box which is enter in text box of WPF window..
item is added but text is display but new item is overrites the previous one but i want to add new item next to previous..
can any one help me...

XML

<window x:class="CheckBox.Window1" xmlns:x="#unknown">
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   Title="Checked Box in ListBox" Height="300" Width="300">
    <grid> 
        <listbox name="list" margin="5,5,5,55" horizontalcontentalignment="Stretch">
            <listbox.itemtemplate>
                <datatemplate>
                    <border margin="3" borderbrush="Brown" borderthickness="2" cornerradius="3">
                        <border.background>                           
                            <lineargradientbrush>                                
                                <gradientstop offset="0" color="Blue" />                               
                                <gradientstop offset="0.5" color="AliceBlue" />                              
                                <gradientstop offset="1" color="Navy" />                               
                            </lineargradientbrush>                        
                        </border.background>        
                        <stackpanel orientation="Horizontal">                            
                            <checkbox margin="2" verticalalignment="Center" ischecked="{Binding IsVisited}" />                           
                            <textblock margin="2" foreground="Yellow" fontsize="14" text="{Binding CityName}" />
                        </stackpanel>                        
                    </border>               
                </datatemplate>        
            </listbox.itemtemplate>          
        </listbox>
        <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="166,225,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />
        <textbox height="23" horizontalalignment="Left" margin="12,226,0,0" name="textBox1" verticalalignment="Top" width="120" />
          </grid>   
</window>

.cs file
-----------

C#

namespace CheckBox

 {

   /// <summary>

   /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window

     {

       public Window1()

        {

           InitializeComponent();



       }
       private void button1_Click(object sender, RoutedEventArgs e)
       {
           List<TripInfo> tripList = new List<TripInfo>();


           tripList.Add(new TripInfo(false, textBox1.Text));


        list.ItemsSource = tripList;
       }

   }

C#

public class TripInfo

   {

        public TripInfo(bool isVisited, string cityName)

          {

             IsVisited = isVisited;

             CityName = cityName;

        }


         public Boolean IsVisited

          { get; set; }


        public String CityName

        { get; set; }
     }

 }

Posted 30-Mar-11 22:33pm

vishal_h

Updated 31-Mar-11 1:48am

Tarun.K.S

v4

Add a Solution

Comments

Tarun.K.S 31-Mar-11 5:13am

Show us the code where you went wrong?

Tarun.K.S 31-Mar-11 7:42am

You need to show the complete XAML too buddy.

2 solutions

Solution 1

Oh now I know what mistake you did.

You are setting the ItemsSource everytime you click it and you have used a List which can replaced with ObservableCollection which can notify you when your collection changed.
In the way that I am going to explain below, you don't have to set the ItemsSource again and again.

It can be solved in this way:

C#

public partial class Window1 : Window
     {

       private ObservableCollection<tripinfo> trips;
       public Window1()
        {
           InitializeComponent();
           this.Loaded+=new RoutedEventHandler(Window1_Loaded);
        }

       
       public Window1_Loaded(object sender,RoutedEventArgs e)
       {
        trips=new ObservableCollection<tripinfo>();
        trips.Add(new TripInfo(false,"Delhi"));
        trips.Add(new TripInfo(true,"New York"));

        list.ItemsSource=trips;
       }

       private void button1_Click(object sender, RoutedEventArgs e)
       {
           trips.Add(new TripInfo(false, textBox1.Text));
           //No need of setting the ItemsSouce here again. 
           //Let the ObservableCollection do the job!
       }

//Similarly you can delete it using trips.Remove  
   }</tripinfo></tripinfo>

Hope it helped! :)

Posted 31-Mar-11 1:59am

Tarun.K.S

Updated 31-Mar-11 2:01am

v2

Comments

Sergey Alexandrovich Kryukov 1-Apr-11 16:35pm

Pretty good one, a 5.
--SA

vishal_h 8-Apr-11 3:22am

how i can read item from that ckeck list box..

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sarath Reviuri · Accepted Answer · 2011-03-31T02:02:00

Solution 2

I have modified your code and the working version is specified below

C#

public partial class Window1 : Window
{
    List<TripInfo> tripList = new List<TripInfo>();
    public Window1()
    {
        InitializeComponent();
        list.ItemsSource = tripList;
    }
    private void button1_Click(object sender, RoutedEventArgs e)
    {
        tripList.Add(new TripInfo(false, textBox1.Text));
        list.Items.Refresh();

    }
}

Posted 31-Mar-11 2:02am

Sarath Reviuri

Comments

Tarun.K.S 31-Mar-11 8:04am

Using Refresh() should be avoided considering the fact that you might have a large collection. I suggest you to use ObservableCollection which can help you notify whenever the collection changes.

Sarath Reviuri 31-Mar-11 8:10am

Thanks for your comment and i too suggest the solution provided by you.

Tarun.K.S 31-Mar-11 8:18am

Thanks! :)

vishal_h 1-Apr-11 2:01am

thank you sir...

Tarun.K.S 1-Apr-11 2:46am

Don't use refresh() vishal. Oh well as you wish.