Question

我想将患者数据保存在xml文件中，如上图所示

<Patients>
  <Patient name="Joao" bi="12345678" age="21" allergies="Pollen" address="" cellphone="961556408" medication="" sex="Male" />
</Patients>

我想在ListView上显示患者，但我想制作一个功能，用户可以通过姓名，出生日期，手机或商务智能过滤患者，但我不知道如何做到这一点，因为数据在XML文件上。

到目前为止我所拥有的： XAML：

<DockPanel Margin="2.4,7.2,8,1.4" Grid.Column="2" Grid.Row="2">
            <TextBox DockPanel.Dock="Top" Margin="0,0,541.2,10" Name="txtFilter" TextChanged="txtFilter_TextChanged" />
            <DatePicker x:Name="datePicker" DockPanel.Dock="Top" Margin="50,-27,541.2,10" Height="26" VerticalAlignment="Top"/>
            <ComboBox DockPanel.Dock="Top" Name="SearchCombo" SelectedValuePath="Content" Margin="380,-45,279.2,10"  Width="120" SelectionChanged="ComboBox_SelectionChanged" Height="21">
                <ComboBoxItem Content="Name"></ComboBoxItem>
                <ComboBoxItem Content="date of birth"></ComboBoxItem>
                <ComboBoxItem Content="Cellphone"></ComboBoxItem>
                <ComboBoxItem Content="BI"></ComboBoxItem>
            </ComboBox>
            <ListView Name="lvPatients" ItemsSource="{Binding Source={StaticResource PatientsData}, XPath=Patient}" SelectionChanged="lvPatients_SelectionChanged">
                <ListView.View>
                    <GridView>
                        <GridViewColumn Header="Name" Width="200" DisplayMemberBinding="{Binding XPath =@name}" />
                        <GridViewColumn Header="BI" Width="100" DisplayMemberBinding="{Binding XPath = @bi}" />
                        <GridViewColumn Header="Cellphone" Width="100" DisplayMemberBinding="{Binding XPath = @cellphone}"/>
                        <GridViewColumn Header="Sex type" Width="100" DisplayMemberBinding="{Binding XPath = @sex}"/>

                    </GridView>
                </ListView.View>
            </ListView>
        </DockPanel>

C＃代码：组合代码：

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lvPatients.ItemsSource);
    switch (SearchCombo.SelectedValue.ToString())
    {
        case "Name": 
            datePicker.Visibility = Visibility.Hidden; //Shows the date picker
            txtFilter.Visibility = Visibility.Visible; // Hides the text box
            view.Filter = PatientNameFilter;
            break;
        case "Date of birth": 
            datePicker.Visibility = Visibility.Visible; //Shows the date picker
            txtFilter.Visibility = Visibility.Hidden; // Hides the text box
            view.Filter = PatientDateFilter;
            break;
        case "BI": 
            datePicker.Visibility = Visibility.Hidden; //Shows the date picker
            txtFilter.Visibility = Visibility.Visible; // Hides the text box 
            view.Filter = PatientBIFilter;
            break;
        case "Cellphone": 
            datePicker.Visibility = Visibility.Hidden; //Shows the date picker
            txtFilter.Visibility = Visibility.Visible; // Hides the text box 
            view.Filter = PatientPhoneFilter; // Cellphone
            break;

    }
}

所以问题是我不知道如何过滤listView上的数据。例如，如果我写＆＃34; Joao＆＃34;在texbox上，listView应该只显示患者＆＃34; Joao＆＃34;以及与他/她有关的一切（姓名，出生日期，性别等）。

提前致谢！

Answer 1

您想要使用绑定到CollectionViewSource的{{1}}。这将允许动态过滤。

这是一篇博客文章，解释了如何执行此操作：

https://grantwinney.com/using-a-textbox-and-collectionviewsource-to-filter-a-listview-in-wpf/

文件：

https://msdn.microsoft.com/en-us/library/system.windows.data.collectionview(v=vs.110).aspx

此外，使用直接XML可能会在将属性值转换为其本机类型时遇到一些问题。参见：

How do I use CollectionViewSource to sort xml records by date?

此外，

Filter XML data from XmlDataProvider using XPath

wpf在listview上过滤xml数据

1 个答案: