【WPF】 自定义控件的自定义属性

前言

在一个页面，重复用到同一个自定义控件时，该如何对控件分别进行数据绑定呢？这时候可以赋予控件一个自定义的属性，来完成此操作。

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一、自定义控件部分

为自定以控件设置 DataTag和SelectedI属性。

<UserControl x:Class="Module3DS.Components.DataList"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:Module3DS.Components"mc:Ignorable="d" d:DesignHeight="250" d:DesignWidth="300"><GroupBox Grid.Column="0" Header="数据列表"><DataGrid x:Name="PrjDg" HeadersVisibility="Column" SelectedIndex="{Binding SelectedI}" ItemsSource="{Binding}" Tag="{Binding DataTag}"  ScrollViewer.VerticalScrollBarVisibility="Visible"   CanUserAddRows="False" AutoGenerateColumns="False" CanUserSortColumns="False" MouseDoubleClick="PrjDg_MouseDoubleClick"><DataGrid.Columns><DataGridTextColumn Binding="{Binding NUM}"  Header="一" Width="1*"  IsReadOnly="True"/><DataGridTextColumn Binding="{Binding STAKEKM}" Header="二" IsReadOnly="True" Width="2*"/></DataGrid.Columns></DataGrid></GroupBox>
</UserControl>

控件后端：

   public partial class DataList : UserControl{public DataList(){InitializeComponent();//BingdingFun("TagData", DataGrid.TagProperty);BingdingFun("SelectedI", DataGrid.SelectedIndexProperty);}private void BingdingFun(string name,DependencyProperty dp) {Binding bing = new Binding(name);bing.Source = this;bing.Mode = BindingMode.TwoWay;BindingOperations.SetBinding(PrjDg, dp, bing);}public static readonly DependencyProperty ISProperty = DependencyProperty.Register("TagData", typeof(Object), typeof(DataList));public static readonly DependencyProperty SIProperty = DependencyProperty.Register("SelectedI", typeof(int), typeof(DataList));public Object DataTag{get { return (Object)GetValue(ISProperty); }set { SetValue(ISProperty, value); }}public int SelectedI { get { return (int)GetValue(SIProperty); }set { SetValue(SIProperty, value); }}
}      

二、在页面中使用

<Components:DataList Grid.Column="0" x:Name="Data3DList" DataTag="Data3D" />

<Components:DataList x:Name="IndexDataList" DataTag="DataIndex" />

如此一来，我们的控件就有了DataTag和SelectedI属性，如果你使用的MVVM，还可以做到如下这样

<Components:DataList x:Name="IndexDataList" DataTag="{Binding 属性}" SelectedI= "{Binding 属性}"/>

总结

以上就是如何为自定义控件添加自定义属性了，我们下次再见，拜拜。