WPF C# Tutorial

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:WpfApplication1="clr-namespace:WpfApplication1"
    x:Name="thisWindow" Title="WPF" Height="240" Width="280">
    
        
        
        
                            VerticalAlignment="Bottom"
                Fill="Green"
                Height="{Binding Path=Amount,Converter={StaticResource amountToHeightConverter}}"/>
            
                
                    
                
            

        
    

    
                    ItemTemplate="{StaticResource dataItemtemplate}">
            
                
                    
                

            

        
        
        
    


//File:Window.xaml.cs
using System;
using System.Windows.Data;
using System.Globalization;
using System.Collections.ObjectModel;
namespace WpfApplication1
{
    [ValueConversion(typeof (double), typeof (double))]
    public class AmountToHeightConverter : IValueConverter
    {
        public Object Convert(Object value,Type targetType,Object parameter,CultureInfo culture)
        {
            double amount = System.Convert.ToDouble(value);
            if(amount < 0)
                amount = 0;
            return amount;
        }
        public object ConvertBack(object value,Type targetType,object parameter,CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
    public class DataItem
    {
        public double Amount
        {
            get;
            set;
        }
        public bool IsPositive
        {
            get
            {
                return Amount >= 0;
            }
        }
    }
    public class DataItems : Collection
    {
        public DataItems()
        {
            this.Add(new DataItem(){Amount=5});
            this.Add(new DataItem(){Amount=8});
            this.Add(new DataItem(){Amount=-5});
            this.Add(new DataItem(){Amount=2});
            this.Add(new DataItem(){Amount=-5});
        }
    }
}