我在为数据表创建多个数据视图时遇到问题，然后绑定对新实例无法正常工作。请帮助我解决这个问题....
有没有人可以解决这个问题？请参阅下面的更多详细信息
上一篇文章：
“我们遇到的DataRowView上的PropertyChange事件没有为新的Dataview实例引发。这似乎是一个ADO错误，而不是WPF。在应用程序创建一个新的DataView之后，WPF订阅了从DataView唯一的成员更改事件（一个DataRowView），并取消订阅以更改旧DataRowView中的事件。然后以某种方式ADO更改新DataView而不通知任何内容，用旧的DataRowView替换新的DataRowView。现在对Name列的更改会影响旧的DataRowView，而WPF从不会听到因为它正在收听新的DataRowView。“
提前致谢..
<Window x:Class="WpfStudy.GridView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfStudy"
Height="400" Width="500" Title="Binding Listview with Mulit ItemSource Options">
<Window.Resources>
<local:NameConverter x:Key="NameConverter"/>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<StackPanel>
<Button Click="Button_Click">Click</Button>
<ListView Name="ListviewALL" >
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="LastName" />
<Binding Path="FirstName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding FirstName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="LastName" FontFamily="Lucida Console" Text="{Binding LastName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</StackPanel>
<ListView Name="Listview" Grid.Row="1">
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="LastName" />
<Binding Path="FirstName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding FirstName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="LastName" FontFamily="Lucida Console" Text="{Binding LastName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
<ListView Name="Listview1" Grid.Row="2">
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="LastName" />
<Binding Path="FirstName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding FirstName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Width="140">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="LastName" FontFamily="Lucida Console" Text="{Binding LastName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
namespace WpfStudy
{
public class NameConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter,
System.Globalization.CultureInfo culture)
{
StringBuilder sb=new StringBuilder();
foreach(string val in values)
{
if (sb.Length != 0)
sb.Append(" ");
sb.Append(val);
}
return sb.ToString();
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter,
System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
- i am binding datatable source with 3 list view with differnet dataview. if we create more view instance then two way binding is not working.xaml not getting updated from source.
private void loadDatatable()
{
DataTable dt = new DataTable();
dt.Columns.Add("FirstName");
dt.Columns.Add("LastName");
dt.Columns.Add("Userid");
DataRow dr = dt.NewRow();
dr[0] = "Siva";
dr[1] = "Jagan";
dr[2] = "JS";
dt.Rows.Add(dr);
DataRow dr1 = dt.NewRow();
dr1[0] = "Raam";
dr1[1] = "John";
dr1[2] = "RJ";
dt.Rows.Add(dr1);
ListviewALL.ItemsSource = dt.DefaultView;
dv1 = new DataView(dt);
dv1.RowFilter = "FirstName like'S%'";
dv2 = new DataView(dt);
dv2.RowFilter = "FirstName like 'R%'";
Listview.ItemsSource = dv1;
Listview1.ItemsSource = dv2;
}
答案 0 :(得分：1)
当你使用BindingListCollectionView或ICollectionView而不是Dataview过滤你的东西时会发生什么？
编辑：
我尝试了以下工作：
public BindingListCollectionView View1 { get; set; }
public BindingListCollectionView View2 { get; set; }
View1 = new BindingListCollectionView(new DataView(Dt) { RowFilter = "FirstName like 'R%'" });
View2 = new BindingListCollectionView(new DataView(Dt) { RowFilter = "FirstName like 'S%'"});
添加，修改和删除作品。
EDIT2我的示例代码：更新以满足您的要求。通过任何列表视图中的文本框进行编辑工作！
public class Viewmodel
{
public DataTable Dt { get; set; }
public BindingListCollectionView View1 { get; set; }
public BindingListCollectionView View2 { get; set; }
public Viewmodel()
{
Dt = new DataTable();
Dt.Columns.Add("Name");
Dt.Columns.Add("VorName");
DataRow dr = Dt.NewRow();
dr[0] = "Siva";
dr[1] = "Jagan";
Dt.Rows.Add(dr);
DataRow dr1 = Dt.NewRow();
dr1[0] = "Raam";
dr1[1] = "John";
Dt.Rows.Add(dr1);
View1 = new BindingListCollectionView(new DataView(Dt) { RowFilter = "Name like 'R%'" });
View2 = new BindingListCollectionView(new DataView(Dt){RowFilter = "Name like 'S%'"});
}
}
window.xaml.cs
public partial class MainWindow : Window
{
private Viewmodel _data;
public MainWindow()
{
InitializeComponent();
this._data = new Viewmodel();
this.DataContext = _data;
}
}
window.xaml
<Window.Resources>
<local:NameConverter x:Key="NameConverter"/>
</Window.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="138*" />
<ColumnDefinition Width="209*" />
<ColumnDefinition Width="156*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="76*" />
<RowDefinition Height="235*" />
</Grid.RowDefinitions>
<ListView ItemsSource="{Binding Dt}" Grid.Column="0" Grid.Row="1">
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="Name" />
<Binding Path="VorName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Header="Name" >
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="VorName" DisplayMemberBinding="{Binding VorName}">
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
<ListView ItemsSource="{Binding View1}" Grid.Column="1" Grid.Row="1">
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="Name" />
<Binding Path="VorName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Header="Name" >
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="VorName" DisplayMemberBinding="{Binding VorName}">
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
<ListView ItemsSource="{Binding View2}" Grid.Column="2" Grid.Row="1">
<ListView.View>
<GridView>
<GridViewColumn Width="140" Header="Binding Label" >
<GridViewColumn.DisplayMemberBinding>
<MultiBinding Converter="{StaticResource NameConverter}">
<Binding Path="Name" />
<Binding Path="VorName" />
</MultiBinding>
</GridViewColumn.DisplayMemberBinding>
</GridViewColumn>
<GridViewColumn Header="Name" >
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="FirstName" FontFamily="Lucida Console" Text="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="200" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="VorName" DisplayMemberBinding="{Binding VorName}">
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Grid>
答案 1 :(得分：0)
每次添加后试试这个......
dt.AcceptChanges();
如果这不起作用，则重置行过滤器
var tempFilter = dt.DefaultView.RowFilter;
dt.DefaultView.RowFilter = string.empty;
dt.DefaultView.RowFilter = tempFilter;