ListView(一)
在WPF中,ListView是一个非常强大的控件,我们用几次来说,并且控照MSDN上的Sample来说明。下面先看第一个Sample。
ListView Sample1:
这个例子显示两个GirdView,一个是xaml中绑定的,一个是通过cs中动态生成的。
XAML文件:
从xaml文件中可以看到开头是一个<Window.Resources>,它定义了一个资源文件,它是定义数据源的提供者(ObjectDataProvider)。文件名为EmployeeInfoDataSource,它是指向ds名命空间下的myEmployees类,这个名命空间是由xmlns:ds="clr-namespace:SDKSample"来完成指向的,类myEmployees是ds下的一个类名。下面就着重看< ListView >。在<ListView>标签中有个ItemsSource="{Binding Source= {StaticResource EmployeeInfoDataSource},这是把资源文件中的数据引入到ListView的ItemsSource文件中。
AllowsColumnReorder=”true”是充许GridView的标题栏左右拖动。ColumnHeaderToolTip="Employee Information"是设定鼠标停放在GirdView的标题栏上是显示的内容。接下来定义GridView的Bind字段。 <GridViewColumn DisplayMemberBinding= "{Binding Path=FirstName}" Header="First Name" Width="100"/>是表示一个新的GridView的Column显示Bind的字段为FirstName,并且字段的标题栏显示为“First Name”。其他字段类似。
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ds="clr-namespace:SDKSample" x:Class="SDKSample.Window1"
Loaded="OnLoad">
<Window.Resources>
<ObjectDataProvider x:Key="EmployeeInfoDataSource"
ObjectType="{x:Type ds:myEmployees}"/>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="50"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0" Grid.Column="0" FontSize="14"
HorizontalAlignment="Center">
ListView created with XAML
</TextBlock>
<StackPanel Grid.Row="1" Grid.Column="0" HorizontalAlignment="Center" Orientation="Vertical">
<ListView ItemsSource="{Binding Source=
{StaticResource EmployeeInfoDataSource}}">
<ListView.View>
<GridView AllowsColumnReorder="true"
ColumnHeaderToolTip="Employee Information">
<GridViewColumn DisplayMemberBinding=
"{Binding Path=FirstName}"
Header="First Name" Width="100"/>
<GridViewColumn DisplayMemberBinding=
"{Binding Path=LastName}"
Header="Last Name" Width="100"/>
<GridViewColumn DisplayMemberBinding=
"{Binding Path=EmployeeNumber}"
Header="Employee No." Width="100"/>
</GridView>
</ListView.View>
</ListView>
</StackPanel>
<TextBlock Grid.Row="0" Grid.Column="1" FontSize="14"
HorizontalAlignment="Center">
ListView created with Code
</TextBlock>
<StackPanel Grid.Row="1" Grid.Column="1" Name="myStackPanel"
HorizontalAlignment="Center">
</StackPanel>
</Grid>
</Window>
在CS代码中共有三个类,其中EmployeeInfo和myEmployees是用来绑定数据的。其中myEmployess继承了EmployeeInfo。Window1是动态生成一个GridView。
CS代码:
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
namespace SDKSample
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
void OnLoad(object sender, RoutedEventArgs e)
{
ListView myListView = new ListView();
GridView myGridView = new GridView();
myGridView.AllowsColumnReorder = true;
myGridView.ColumnHeaderToolTip = "Employee Information";
GridViewColumn gvc1 = new GridViewColumn();
gvc1.DisplayMemberBinding = new Binding("FirstName");
gvc1.Header = "FirstName";
gvc1.Width = 100;
myGridView.Columns.Add(gvc1);
GridViewColumn gvc2 = new GridViewColumn();
gvc2.DisplayMemberBinding = new Binding("LastName");
gvc2.Header = "Last Name";
gvc2.Width = 100;
myGridView.Columns.Add(gvc2);
GridViewColumn gvc3 = new GridViewColumn();
gvc3.DisplayMemberBinding = new Binding("EmployeeNumber");
gvc3.Header = "Employee No.";
gvc3.Width = 100;
myGridView.Columns.Add(gvc3);
//ItemsSource is ObservableCollection of EmployeeInfo objects
myListView.ItemsSource = new myEmployees();
myListView.View = myGridView;
myStackPanel.Children.Add(myListView);
}
}
public class EmployeeInfo
{
private string _firstName;
private string _lastName;
private string _employeeNumber;
public string FirstName
{
get {return _firstName;}
set {_firstName = value;}
}
public string LastName
{
get {return _lastName;}
set {_lastName = value;}
}
public string EmployeeNumber
{
get {return _employeeNumber;}
set {_employeeNumber = value;}
}
public EmployeeInfo(string firstname, string lastname, string empnumber)
{
_firstName = firstname;
_lastName = lastname;
_employeeNumber = empnumber;
}
}
public class myEmployees :
ObservableCollection<EmployeeInfo>
{
public myEmployees()
{
Add(new EmployeeInfo("Jesper", "Aaberg", "12345"));
Add(new EmployeeInfo("Dominik", "Paiha", "98765"));
Add(new EmployeeInfo("Yale", "Li", "23875"));
Add(new EmployeeInfo("Muru", "Subramani", "49392"));
}
}
}
如下图:
本文参考MSDN组织。
《asp.net core精要讲解》 https://ke.qq.com/course/265696
《asp.net core 3.0》 https://ke.qq.com/course/437517
《asp.net core项目实战》 https://ke.qq.com/course/291868
《基于.net core微服务》 https://ke.qq.com/course/299524