优化更新代码，添加界面功能并整合
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231
WPFluent/Controls/ComboBoxEx/ComboBoxEx.cs
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231
WPFluent/Controls/ComboBoxEx/ComboBoxEx.cs
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Windows.Controls;
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using System.Windows.Data;
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namespace WPFluent.Controls
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{
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[TemplatePart(Name = FilterTextBox, Type = typeof(WPFluent.Controls.TextBox))]
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[TemplatePart(Name = "PART_EditableTextBox", Type = typeof(WPFluent.Controls.TextBox))]
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public class ComboBoxEx : ComboBox
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{
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private const string FilterTextBox = "PART_FilterTextBox";
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// Using a DependencyProperty as the backing store for FilterBoxPlaceholderText. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty FilterBoxPlaceholderTextProperty = DependencyProperty.Register(
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nameof(FilterBoxPlaceholderText),
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typeof(string),
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typeof(ComboBoxEx),
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new PropertyMetadata("输入关键字"));
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public static readonly DependencyProperty HeaderPlacementProperty = DependencyProperty.Register(
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nameof(HeaderPlacement),
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typeof(Dock),
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typeof(ComboBoxEx),
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new PropertyMetadata(Dock.Top));
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// Using a DependencyProperty as the backing store for Header. This enables animation, styling, binding, etc...
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public static readonly DependencyProperty HeaderProperty = DependencyProperty.Register(
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nameof(Header),
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typeof(string),
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typeof(ComboBoxEx),
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new PropertyMetadata(null));
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public static readonly DependencyProperty PlaceholderTextProperty = DependencyProperty.Register(
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nameof(PlaceholderText),
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typeof(string),
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typeof(ComboBoxEx),
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new PropertyMetadata("请选择..."));
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public static readonly DependencyProperty ShowFilterBoxProperty = DependencyProperty.Register(
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nameof(ShowFilterBox),
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typeof(bool),
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typeof(ComboBoxEx),
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new PropertyMetadata(true));
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private TextBox filterTextBox;
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private ICollectionView view;
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static ComboBoxEx()
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{
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DefaultStyleKeyProperty.OverrideMetadata(
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typeof(ComboBoxEx),
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new FrameworkPropertyMetadata(typeof(ComboBoxEx)));
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}
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/// <summary>
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/// 过滤搜索
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void PART_FilterTextBox_TextChanged(object sender, TextChangedEventArgs e)
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{
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if(filterTextBox == null)
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return;
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if(view != null)
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{
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view.Filter += (o) =>
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{
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if(o is string)
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{
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var value = o.ToString().ToLower();
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return value.IndexOf(filterTextBox.Text.ToLower(), StringComparison.Ordinal) != -1;
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}
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else
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{
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var obj = GetPropertyValue(o, DisplayMemberPath);
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//在xaml中写入Combobox时
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if(obj is ComboBoxItem item)
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{
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obj = item.Content;
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}
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var value = Convert.ToString(obj).ToLower();
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return value.IndexOf(filterTextBox.Text.ToLower(), StringComparison.Ordinal) != -1;
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}
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};
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}
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}
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/// <summary>
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/// 获取view
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/// </summary>
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/// <param name="e"></param>
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/// <remarks>适用于在xaml中添加ComboBoxItem的情况</remarks>
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protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
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{
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base.OnItemsChanged(e);
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view = CollectionViewSource.GetDefaultView(Items);
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}
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/// <summary>
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/// 获取view
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/// </summary>
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/// <param name="oldValue"></param>
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/// <param name="newValue"></param>
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/// <remarks>适用于绑定ItemsSource</remarks>
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protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
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{
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base.OnItemsSourceChanged(oldValue, newValue);
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view = CollectionViewSource.GetDefaultView(ItemsSource);
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}
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/// <summary>
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/// 获取属性,若无法获取则返回源对象
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/// </summary>
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public static object GetPropertyValue(object obj, string path)
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{
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if(obj == null)
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return string.Empty;
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var result = obj;
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if(!string.IsNullOrEmpty(path))
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{
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var property = obj.GetType().GetProperty(path);
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if(property != null)
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{
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try
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{
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result = property.GetValue(obj, null);
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return result;
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} catch
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{
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try
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{
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var type = obj.GetType();
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var mInfo = type.GetMethod($"get_{path}");
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if(mInfo != null)
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{
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result = mInfo.Invoke(obj, null);
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return result;
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}
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} catch
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{
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}
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}
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}
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}
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return result;
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}
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/// <summary>
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/// 应用样板
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/// </summary>
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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if(filterTextBox != null)
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{
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filterTextBox.TextChanged -= PART_FilterTextBox_TextChanged;
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}
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filterTextBox = GetTemplateChild(FilterTextBox) as TextBox;
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if(filterTextBox != null)
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{
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filterTextBox.TextChanged += PART_FilterTextBox_TextChanged;
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}
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}
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[Category("自定义"), Bindable(true, BindingDirection.OneWay), Description("搜索框水印")]
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public string FilterBoxPlaceholderText
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{
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get { return (string)GetValue(FilterBoxPlaceholderTextProperty); }
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set { SetValue(FilterBoxPlaceholderTextProperty, value); }
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}
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[Category("自定义"), Bindable(true, BindingDirection.TwoWay), Description("标题")]
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public string Header
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{
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get { return (string)GetValue(HeaderProperty); }
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set { SetValue(HeaderProperty, value); }
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}
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//public bool PlaceholderEnable
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//{
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// get { return (bool)GetValue(PlaceholderEnableProperty); }
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// set { SetValue(PlaceholderEnableProperty, value); }
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//}
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//// Using a DependencyProperty as the backing store for PlaceholderEnable. This enables animation, styling, binding, etc...
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//public static readonly DependencyProperty PlaceholderEnableProperty = DependencyProperty.Register(
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// nameof(PlaceholderEnable),
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// typeof(bool),
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// typeof(ComboBoxEx),
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// new PropertyMetadata(true)
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//);
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[Category("自定义"), Bindable(true, BindingDirection.OneWay), Description("标题位置")]
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public Dock HeaderPlacement
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{
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get { return (Dock)GetValue(HeaderPlacementProperty); }
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set { SetValue(HeaderPlacementProperty, value); }
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}
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/// <summary>
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///
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/// </summary>
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/// <remarks>
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/// <para>特性含义：属性面板（支持分组，支持数据绑定，支持属性提示）</para>
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/// <para>[Category("自定义分组"),Bindable(true,BindingDirection.OneWay),Description("选择框水印")]</para>
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/// </remarks>
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[Category("自定义"), Bindable(true, BindingDirection.OneWay), Description("选择框水印")]
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public string PlaceholderText
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{
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get { return (string)GetValue(PlaceholderTextProperty); }
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set { SetValue(PlaceholderTextProperty, value); }
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}
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/// <summary>
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/// 获取或者设置下拉列表过滤文本框的显示与隐藏
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/// </summary>
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[Category("自定义"), Bindable(true, BindingDirection.OneWay), Description("过滤框")]
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public bool ShowFilterBox
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{
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get => (bool)GetValue(ShowFilterBoxProperty);
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set { SetValue(ShowFilterBoxProperty, value); }
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}
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}
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}
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