【发布时间】：2010-04-20 05:41:53
【问题描述】：
我正在尝试在 wpf 中编写 Dual List 用户控件。
我是 wpf 的新手，我发现它非常困难。 这是我在几个小时内完成的。它不是很好，而是一个开始。
如果有 wpf 经验的人可以改进它，我将非常感激。 目的是尽可能简化使用
我有点卡住了。 我希望 DualList 控件的用户能够设置标题，你是如何做到的。 我需要在我的控件中公开一些依赖属性吗？
在加载用户必须通过 ObservableCollection 的那一刻，有没有更好的方法？
您能看一下并可能对一些代码提出任何建议吗？
非常感谢！！！！！！
xaml
<Grid ShowGridLines="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="25px"></ColumnDefinition>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<StackPanel Orientation="Vertical" Grid.Column="0" Grid.Row="0">
<Label Name="lblLeftTitle" Content="Available"></Label>
<ListView Name="lvwLeft">
</ListView>
</StackPanel>
<WrapPanel Grid.Column="1" Grid.Row="0">
<Button Name="btnMoveRight" Content=">" Width="25" Margin="0,35,0,0" Click="btnMoveRight_Click" />
<Button Name="btnMoveAllRight" Content=">>" Width="25" Margin="0,05,0,0" Click="btnMoveAllRight_Click" />
<Button Name="btnMoveLeft" Content="<" Width="25" Margin="0,25,0,0" Click="btnMoveLeft_Click" />
<Button Name="btnMoveAllLeft" Content="<<" Width="25" Margin="0,05,0,0" Click="btnMoveAllLeft_Click" />
</WrapPanel>
<StackPanel Orientation="Vertical" Grid.Column="2" Grid.Row="0">
<Label Name="lblRightTitle" Content="Selected"></Label>
<ListView Name="lvwRight">
</ListView>
</StackPanel>
</Grid>
客户
public partial class DualListTest
{
public ObservableCollection<ListViewItem> LeftList { get; set; }
public ObservableCollection<ListViewItem> RightList { get; set; }
public DualListTest()
{
InitializeComponent();
LoadCustomers();
LoadDualList();
}
private void LoadDualList()
{
dualList1.Load(LeftList, RightList);
}
private void LoadCustomers()
{
//Pretend we are getting a list of Customers from a repository.
//Some go in the left List(Good Customers) some go in the Right List(Bad Customers).
LeftList = new ObservableCollection<ListViewItem>();
RightList = new ObservableCollection<ListViewItem>();
var customers = GetCustomers();
foreach (var customer in customers)
{
if (customer.Status == CustomerStatus.Good)
{
LeftList.Add(new ListViewItem { Content = customer });
}
else
{
RightList.Add(new ListViewItem{Content=customer });
}
}
}
private static IEnumerable<Customer> GetCustomers()
{
return new List<Customer>
{
new Customer {Name = "Jo Blogg", Status = CustomerStatus.Good},
new Customer {Name = "Rob Smith", Status = CustomerStatus.Good},
new Customer {Name = "Michel Platini", Status = CustomerStatus.Good},
new Customer {Name = "Roberto Baggio", Status = CustomerStatus.Good},
new Customer {Name = "Gio Surname", Status = CustomerStatus.Bad},
new Customer {Name = "Diego Maradona", Status = CustomerStatus.Bad}
};
}
}
用户控件
public partial class DualList:UserControl
{
public ObservableCollection<ListViewItem> LeftListCollection { get; set; }
public ObservableCollection<ListViewItem> RightListCollection { get; set; }
public DualList()
{
InitializeComponent();
}
public void Load(ObservableCollection<ListViewItem> leftListCollection, ObservableCollection<ListViewItem> rightListCollection)
{
LeftListCollection = leftListCollection;
RightListCollection = rightListCollection;
lvwLeft.ItemsSource = leftListCollection;
lvwRight.ItemsSource = rightListCollection;
EnableButtons();
}
public static DependencyProperty LeftTitleProperty = DependencyProperty.Register("LeftTitle",
typeof(string),
typeof(Label));
public static DependencyProperty RightTitleProperty = DependencyProperty.Register("RightTitle",
typeof(string),
typeof(Label));
public static DependencyProperty LeftListProperty = DependencyProperty.Register("LeftList",
typeof(ListView),
typeof(DualList));
public static DependencyProperty RightListProperty = DependencyProperty.Register("RightList",
typeof(ListView),
typeof(DualList));
public string LeftTitle
{
get { return (string)lblLeftTitle.Content; }
set { lblLeftTitle.Content = value; }
}
public string RightTitle
{
get { return (string)lblRightTitle.Content; }
set { lblRightTitle.Content = value; }
}
public ListView LeftList
{
get { return lvwLeft; }
set { lvwLeft = value; }
}
public ListView RightList
{
get { return lvwRight; }
set { lvwRight = value; }
}
private void EnableButtons()
{
if (lvwLeft.Items.Count > 0)
{
btnMoveRight.IsEnabled = true;
btnMoveAllRight.IsEnabled = true;
}
else
{
btnMoveRight.IsEnabled = false;
btnMoveAllRight.IsEnabled = false;
}
if (lvwRight.Items.Count > 0)
{
btnMoveLeft.IsEnabled = true;
btnMoveAllLeft.IsEnabled = true;
}
else
{
btnMoveLeft.IsEnabled = false;
btnMoveAllLeft.IsEnabled = false;
}
if (lvwLeft.Items.Count != 0 || lvwRight.Items.Count != 0) return;
btnMoveLeft.IsEnabled = false;
btnMoveAllLeft.IsEnabled = false;
btnMoveRight.IsEnabled = false;
btnMoveAllRight.IsEnabled = false;
}
private void MoveRight()
{
while (lvwLeft.SelectedItems.Count > 0)
{
var selectedItem = (ListViewItem)lvwLeft.SelectedItem;
LeftListCollection.Remove(selectedItem);
RightListCollection.Add(selectedItem);
}
lvwRight.ItemsSource = RightListCollection;
lvwLeft.ItemsSource = LeftListCollection;
EnableButtons();
}
private void MoveAllRight()
{
while (lvwLeft.Items.Count > 0)
{
var item = (ListViewItem)lvwLeft.Items[lvwLeft.Items.Count - 1];
LeftListCollection.Remove(item);
RightListCollection.Add(item);
}
lvwRight.ItemsSource = RightListCollection;
lvwLeft.ItemsSource = LeftListCollection;
EnableButtons();
}
private void MoveAllLeft()
{
while (lvwRight.Items.Count > 0)
{
var item = (ListViewItem)lvwRight.Items[lvwRight.Items.Count - 1];
RightListCollection.Remove(item);
LeftListCollection.Add(item);
}
lvwRight.ItemsSource = RightListCollection;
lvwLeft.ItemsSource = LeftListCollection;
EnableButtons();
}
private void MoveLeft()
{
while (lvwRight.SelectedItems.Count > 0)
{
var selectedCustomer = (ListViewItem)lvwRight.SelectedItem;
LeftListCollection.Add(selectedCustomer);
RightListCollection.Remove(selectedCustomer);
}
lvwRight.ItemsSource = RightListCollection;
lvwLeft.ItemsSource = LeftListCollection;
EnableButtons();
}
private void btnMoveLeft_Click(object sender, RoutedEventArgs e)
{
MoveLeft();
}
private void btnMoveAllLeft_Click(object sender, RoutedEventArgs e)
{
MoveAllLeft();
}
private void btnMoveRight_Click(object sender, RoutedEventArgs e)
{
MoveRight();
}
private void btnMoveAllRight_Click(object sender, RoutedEventArgs e)
{
MoveAllRight();
}
}
【问题讨论】：
标签： wpf