Question

我认为这是一个常见的问题，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DataSet需要绑定到ListView。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：

的WinForms：

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，但没有达到目标。任何帮助都感激不尽。

Answer 1

简单示例：

<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>

你将ListView绑定到背后的代码中定义的人，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 { };
}

所以你必须使用ObservableCollection<Person>而不是创建一个包含列和行的DataTable作为ListView的源。

一些提示..当添加或删除项目时，ObservableCollection将通知View，并且当集合中存在的项目的某些属性发生更改时，带有PropertyChanged事件的INotifyPropertyChanged接口将通知GUI。

使用ObservableCollection将DataTable绑定到ListView

1 个答案: