使用 ObservableCollection 将数据表绑定到 ListView
本文关键字:ListView 绑定 数据表 ObservableCollection 使用 | 更新日期: 2023-09-27 17:56:39
我看到这是一个常见问题,因为我已经浏览了很多帖子,但无法找到解决方案。我正在从WinForm
迁移到WPF
,并且有一个需要绑定到ListView
的DataSet
。我试图遵循这个解决方案:https://stackoverflow.com/a/5880315/2920121 但没有成功。请注意,我是 C# 和 .NET 的新手。
这是我的WPF和WinForms代码:
赢形:
CmdStrFg = "SELECT dbname, Version, UpdateTime FROM(...)as tbl2 ";
CmdStrBlm = "SELECT dbname, Version, UpdateTime FROM (...)as tbl1 ";
CmdStrPay = "SELECT dbname, Version, UpdateTime FROM(...)as tbl3 ";
CmdStrTran = "SELECT dbname, Version, UpdateTime FROM(...)as tbl4";
DataSet ds = new DataSet();
ds.Tables.Add(GetDataFromDatabase(GetConnectionString(conStringBlm), CmdStrBlm));
ds.Tables.Add(GetDataFromDatabase(GetConnectionString(conStringFg), CmdStrFg));
ds.Tables.Add(GetDataFromDatabase(GetConnectionString(conStringPay), CmdStrPay));
ds.Tables.Add(GetDataFromDatabase(GetConnectionString(conStringTrans), CmdStrTran));
DataTable dtAll = ds.Tables[0].Copy();
for (var i = 1; i < ds.Tables.Count; i++) // this did the trick for
{ // for me with WinForms
dtAll.Merge(ds.Tables[i]);
}
dataGridView1.AutoGenerateColumns = true;
dataGridView1.DataSource = dtAll;
// resize column 3 to fit the window content
WPF.xaml:
<ListView ItemsSource="{Binding DbVersions}" DockPanel.Dock="Top">
<ListView.View>
<GridView>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}"/>
<GridViewColumn Header="Version" DisplayMemberBinding="{Binding Version}" Width="60"/>
<GridViewColumn Header="Last Updated" DisplayMemberBinding="{Binding LastUpdated}" Width="140"/>
</GridView>
</ListView.View>
</ListView>
我试图将ObservableCollection
与类对象一起使用,但没有走远。任何帮助将不胜感激。
简单的例子:
<Window x:Class="StackSimpleSample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<ListView ItemsSource="{Binding persons}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Grid>
您将 ListView 绑定到人员,该人员在代码后面定义,如下所示:
public partial class MainWindow : Window
{
public ObservableCollection<Person> persons { get; set; }
public MainWindow()
{
InitializeComponent();
persons = new ObservableCollection<Person>();
persons.Add(new Person() { Name = "Person1" });
persons.Add(new Person() { Name = "Person2" });
persons.Add(new Person() { Name = "Person3" });
persons.Add(new Person() { Name = "Person4" });
this.DataContext = this;
}
}
这是 Person 类:
public class Person : INotifyPropertyChanged
{
private string _Name;
public string Name
{
get { return _Name; }
set
{
_Name = value;
PropertyChanged(this, new PropertyChangedEventArgs("Name"));
}
}
public event PropertyChangedEventHandler PropertyChanged = delegate { };
}
因此,您必须使用该ObservableCollection<Person>
,而不是创建一个将列和行作为列表视图源的数据表。
一些提示..ObservableCollection 将在添加或删除项时通知视图,并且当集合中现有项的某些属性发生更改时,带有其 PropertyChanged 事件的 INotifyPropertyChanged 接口将通知 GUI。