[WPF] ListBox Data Binding
在這裡用2種方法來實作(第2種方法其實只是第1種的變種而已，原理是一樣的)
同時包含Style & Template 的組合用法
首先新增一個Fruit class
class Fruit
{
public string Name { get; set; }
public double Price { get; set; }
public Fruit(string name, double price)
{
Name = name;
Price = price;
}
}
再來新增一個Fruits class、一個FruitsSQL class、以及FruitsSQL的資料來源 DataAccess class
class Fruits: List<Fruit>
{
public Fruits()
{
Add(new Fruit("Apple", 10));
Add(new Fruit("Orange",5));
Add(new Fruit("Lemon",4));
Add(new Fruit("Mango",15));
Add(new Fruit("Grape",13));
}
}
class FruitsSQL:List<Fruit>
{
public FruitsSQL()
{
AddRange(new DataAccess().getFruit());
}
}
class DataAccess
{
public DataAccess(){ }
public List<Fruit> getFruit()
{
List<Fruit> FruitList = new List<Fruit>();
string sConn = @"ConnectionString";
using (SqlConnection conn = new SqlConnection(sConn))
{
SqlCommand cmd = new SqlCommand("select * from fruit", conn);//fruit table: name, price
conn.Open();
try
{
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
FruitList.Add(new Fruit(reader["name"].ToString(), int.Parse(reader["price"].ToString())));
}
}
}
catch (Exception ex)
{
//error occur
}
finally
{
conn.Close();
}
}
return FruitList;
}
}
這樣子 ListBox Data 的來源就準備好了，接著看XAML的部分
<Window x:Class="WpfApplication4.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:src="clr-namespace:WpfApplication4.Data"
Title="Window1" Height="300" Width="300">
<Grid>
<Grid.Resources>
<src:Fruits x:Key="myFruits"></src:Fruits>
<src:FruitsSQL x:Key="myFruitsSQL"></src:FruitsSQL>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Border Name="border" BorderBrush="Black" BorderThickness="0,0,0,1" Background="LightGray">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}" Width="100"></TextBlock>
<TextBlock Text="{Binding Path=Price}"></TextBlock>
</StackPanel></Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter TargetName="border" Property="Background" Value="LightBlue"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
<ListBox Name="Fruitlist" ItemsSource="{StaticResource myFruits}" Margin="0,0,0,122">
</ListBox>
<ListBox Name="Fruitlist2" ItemsSource="{StaticResource myFruitsSQL}" Height="114" VerticalAlignment="Bottom">
</ListBox>
</Grid>
</Window>
程式實際執行畫面:
