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WPF组合框文本搜索,包含_Wpf_Search_Combobox - Fatal编程技术网

WPF组合框文本搜索,包含

WPF组合框文本搜索,包含,wpf,search,combobox,Wpf,Search,Combobox,如何使用contains而不是StartsWith实现组合框文本搜索 <rf:ComboBox Grid.Row="1" Grid.Column="5" Width="200" ItemsSource="{Binding Source={StaticResource AccountProvider}}"

如何使用
contains
而不是
StartsWith
实现组合框文本搜索

<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"/>


搜索函数可以工作,但我需要匹配子字符串,无法用string.Contains()替换string.StartsWith()。您必须编写自定义组合框

本文可能会帮助您:
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(.....)};
    }
}
//ItemsSource-pData
//fooClass(DisplayMemberPath)中包含一个字符串属性-wTitle
私有可观测收集数据;
公共可观测收集pData{
获取{return\uu pData;}
set{set(()=>pData,ref u pData,value);
RaisePropertyChanged(“pData”);
}
}
私有字符串_SearchText;
公共字符串搜索文本{
获取{返回此。\u SearchText;}
设置{
这是。_SearchText=value;
RaisePropertyChanged(“搜索文本”);
//使用Linq在此处更新您的ItemsSource
pData=新的ObservableCollection{pData.ToList()。其中(…)};
}
}
您可以看到可编辑组合框绑定到字符串(SearchText) 一旦出现TextChanged事件,将显示下拉列表,双向绑定将更新该值。 cs文件中的ItemsSource在进入集合{}时发生了更改;语法

此示例看起来像“文本搜索”

在XAML文件中,您应该只向组合框“TextContainSearch.Text”添加一个属性:

和*.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>

视图模型:

    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();
        }
    }
私有字符串snFilter;
公共字符串SnFilter
{
获取{return snFilter;}
设置
{
snFilter=值;
RaisePropertyChanged();
RaisePropertyChanged(请求名称));
}
}
私人名单请求;
公开列表请求
{
get=>string.IsNullOrEmpty(SnFilter)| | requests.Any(r=>r.SN==SnFilter)
?请求
:requests.Where(r=>r.SN.Contains(SnFilter)).ToList();
设置
{
请求=价值;
RaisePropertyChanged();
}
}
我无法让“Set”语法在我的C#系统中工作,因此这里是对上面Wu的答案的一个小小的补充(这是在一个自定义控件中):


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>
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))
               );
            }
        }
private async void\u已加载(对象发送方,RoutedEventArgs e)
{
var n=等待初始化测试;
所有测试=新的可观察收集(n);
pData=新的可观测集合(n);
}
//ItemsSource-pData
//fooClass(DisplayMemberPath)中包含一个字符串属性-wTitle
私有可观测收集数据;
公共可观测收集pData
{
获取{return\uu pData;}
设置{uuu pData=value;RaisePropertyChanged();}
}
私有字符串_SearchText;
公共字符串搜索文本
{
获取{return\u SearchText;}
设置
{
_SearchText=value;RaisePropertyChanged();
//使用Linq在此处更新您的ItemsSource
pData=新的可观测采集
(
其中(q=>q.description.Contains(SearchText))
);
}
}

唯一显著的区别在于SearchText setter。

据我所知,实现这一点的唯一方法是创建一个扩展ComboBox的控件,并添加所需的功能。此代码段中的模式是什么?我知道附加的属性,并且大部分时间都使用它们来完成这个代码段所做的事情——注册到控件的事件。虽然我从未见过这种情况,并且对您的方法的工作方式非常感兴趣。Hi@Evgenii,但是inSetText(DependencyObject元素,string text),“text”参数的值始终是“DeviceNumber”字符串。所以我输入的文本没有反映在那里。有什么原因吗?
 <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>
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))
               );
            }
        }