search 相关问题

我如何使用 contains 而不是 StartsWith 来实现我的 Combobox TextSearch 我如何使用 contains 而不是 StartsWith 来实现我的组合框文本搜索 <rf:ComboBox Grid.Row="1" Grid.Column="5" Width="200" ItemsSource="{Binding Source={StaticResource AccountProvider}}" DisplayMemberPath="Description" SelectedValuePath="IndRekId" IsEmptyItemVisible="True" SelectedValue="{Binding Id, UpdateSourceTrigger=PropertyChanged}" IsTextSearchEnabled="True" TextSearch.TextPath="Description" IsEditable="True"/> 搜索功能可以工作，但我需要匹配子字符串这里我有一个MVVM框架的例子。我的xaml文件： <ComboBox Name="cmbContains" IsEditable="True" IsTextSearchEnabled="false" ItemsSource="{Binding pData}" DisplayMemberPath="wTitle" Text="{Binding SearchText ,Mode=TwoWay}" > <ComboBox.Triggers> <EventTrigger RoutedEvent="TextBoxBase.TextChanged"> <BeginStoryboard> <Storyboard> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="IsDropDownOpen"> <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0"/> </BooleanAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> </ComboBox.Triggers> </ComboBox> 我的cs文件： //ItemsSource - pData //There is a string attribute - wTitle included in the fooClass (DisplayMemberPath) private ObservableCollection<fooClass> __pData; public ObservableCollection<fooClass> pData { get { return __pData; } set { Set(() => pData, ref __pData, value); RaisePropertyChanged("pData"); } } private string _SearchText; public string SearchText { get { return this._SearchText; } set { this._SearchText = value; RaisePropertyChanged("SearchText"); //Update your ItemsSource here with Linq pData = new ObservableCollection<fooClass>{pData.ToList().Where(.....)}; } } 您可以看到可编辑的组合框绑定到字符串（SearchText）一旦发生 TextChanged 事件，就会显示下拉菜单，并且双向绑定会更新值。当进入 set{} 时，cs 文件中的 ItemsSource 发生了变化；语法。 https://gist.github.com/tonywump/82e66abaf71f715c4bd45a82fce14d80 这个示例看起来像“TextSearch” 在 XAML 文件中，您应该只向组合框“TextContainSearch.Text”添加一个属性： <ComboBox ItemsSource="{Binding Model.formListIntDeviceNumbers}" SelectedItem="{Binding Path=Model.selectedDeviceNumber, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" DisplayMemberPath="DeviceNumber" IsEditable="True" c:TextContainSearch.Text="DeviceNumber"> 我们应该在 XAML 文件的标头中添加 using ： xmlns:c="clr-namespace:Adaptive.Controls.Extension" *.cs 文件中的 C# 代码： using System; using System.Windows; using System.Windows.Controls; namespace Adaptive.Controls.Extension { public sealed class TextContainSearch : DependencyObject { public static void SetText(DependencyObject element, string text) { var controlSearch = element as Control; if (controlSearch != null) controlSearch.KeyUp += (sender, e) => { if (sender is ComboBox){ var control = sender as ComboBox; control.IsDropDownOpen = true; var oldText = control.Text; foreach(var itemFromSource in control.ItemsSource){ if (itemFromSource != null) { Object simpleType = itemFromSource.GetType().GetProperty(text).GetValue(itemFromSource, null); String propertOfList = simpleType as string; if (!string.IsNullOrEmpty(propertOfList) && propertOfList.Contains(control.Text)) { control.SelectedItem = itemFromSource; control.Items.MoveCurrentTo(itemFromSource); break; } } } control.Text = oldText; TextBox txt = control.Template.FindName("PART_EditableTextBox", control) as TextBox; if (txt != null) { txt.Select(txt.Text.Length, 0); } } }; } } } 试试这个： <ComboBox Padding="3,5" MinWidth="150" SelectedItem="{Binding NewBoxRequest}" ItemsSource="{Binding Requests}" DisplayMemberPath="SN" IsEditable="True" StaysOpenOnEdit="True" Text="{Binding SnFilter,UpdateSourceTrigger=PropertyChanged}"> </ComboBox> 查看型号： private string snFilter; public string SnFilter { get { return snFilter; } set { snFilter = value; RaisePropertyChanged(); RaisePropertyChanged(nameof(Requests)); } } private List<Request> requests; public List<Request> Requests { get => string.IsNullOrEmpty(SnFilter) || requests.Any(r => r.SN == SnFilter) ? requests : requests.Where(r => r.SN.Contains(SnFilter)).ToList(); set { requests = value; RaisePropertyChanged(); } } 无法用 string.Contains() 替换 string.StartsWith()。您必须编写自定义组合框。这篇文章可能会帮助您： http://www.codeproject.com/Tips/631196/ComboBox-with-Suggest-Ability-based-on-Substring-S 我无法让“Set”语法在我的 C# 系统中工作，所以这里是对上面 Wu 的答案的一个小起飞（这是在自定义控件中）： <ComboBox IsEditable="True" IsTextSearchEnabled="false" ItemsSource="{Binding pData, RelativeSource = {RelativeSource TemplatedParent}}" DisplayMemberPath="description" Text="{Binding SearchText , RelativeSource = {RelativeSource TemplatedParent}, Mode=TwoWay}" > <ComboBox.Triggers> <EventTrigger RoutedEvent="TextBoxBase.TextChanged"> <BeginStoryboard> <Storyboard> <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="IsDropDownOpen"> <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0"/> </BooleanAnimationUsingKeyFrames> </Storyboard> </BeginStoryboard> </EventTrigger> </ComboBox.Triggers> </ComboBox> 在自定义控件中： private async void _Loaded(object sender, RoutedEventArgs e) { var n = await InitializeLabTests; allTests = new ObservableCollection<CommonProcedure>(n); pData = new ObservableCollection<CommonProcedure>(n); } //ItemsSource - pData //There is a string attribute - wTitle included in the fooClass (DisplayMemberPath) private ObservableCollection<CommonProcedure> __pData; public ObservableCollection<CommonProcedure> pData { get { return __pData; } set { __pData = value; RaisePropertyChanged(); } } private string _SearchText; public string SearchText { get { return _SearchText; } set { _SearchText = value; RaisePropertyChanged(); //Update your ItemsSource here with Linq pData = new ObservableCollection<CommonProcedure> ( allTests.Where(q => q.description.Contains(SearchText)) ); } } 唯一显着的区别在于 SearchText 设置器。 ComboBox KeyUp 事件上的动态事件怎么样： <ComboBox DisplayMemberPath="Label" Height="37" Padding="5" SelectedValue="{Binding Client, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding ClientList, UpdateSourceTrigger=PropertyChanged }" IsEditable="True" TextSearch.TextPath="Label" KeyUp="ComboBox_KeyUp" /> 活动： private void ComboBox_KeyUp(object sender, KeyEventArgs e) { var control = sender as ComboBox; if (control == null) { return; } if (control.Tag == null) { control.Tag = control.ItemsSource as List<ComboBoxItemViewModel>; } var filter = control.Text.ToLower(); if (filter.Length == 0) { // If no text, show all items control.ItemsSource = control.Tag as List<ComboBoxItemViewModel>; } else { var dataSource = control.Tag as List<ComboBoxItemViewModel>; if (dataSource == null) return; // Filter items based on the text entered control.ItemsSource = dataSource.Where(item => item.Label.ToLower().Contains(filter)).ToList(); } } //Just replace the List<ComboBoxItemViewModel> with your ViewModel

wpf search combobox

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