C# WPF 实现Tab页动态增减

概述

Tab页面是一个很常用的控件，针对页面固定的场景，直接给Item进行数据绑定就行，如下所示：

代码语言：javascript复制

        <dx:DXTabControl cal:Message.Attach="[Event Loaded]=[TabControl_Loaded($source,$eventArgs)]">
            <dx:DXTabItem Header="{Binding Region[0]}" Visibility="{Binding TabPageDispaly[0]}">
                <ContentControl  cal:View.Model="{Binding ParamPage}" />
            </dx:DXTabItem>
            <dx:DXTabItem Header="{Binding Region[1]}" Visibility="{Binding TabPageDispaly[1]}">
                <ContentControl  cal:View.Model="{Binding ParamPage}"/>
            </dx:DXTabItem>
            <dx:DXTabItem Header="{Binding Region[2]}" Visibility="{Binding TabPageDispaly[2]}">
                <ContentControl  cal:View.Model="{Binding ParamPage}"/>
            </dx:DXTabItem>
         
        </dx:DXTabControl>

但是针对页面需要动态增减的场景，这种方法就不再适用了，下面就针对这种情况进行讲解.

数据定义

代码语言：javascript复制

 [AddINotifyPropertyChangedInterface]
    public class UserInfos
    {
        /// <summary>
        /// Header
        /// </summary>
        public int Header { get; set; }

        /// <summary>
        /// 姓名
        /// </summary>
        public string UserName { get; set; }


        public EventAggregatorViewModel EventAggregatorViewModel { get; set; }
    }

这里定义了一个标题Header ，用户名UserName ，以及另外个ViewModel类

数据集合定义：

代码语言：javascript复制

  public BindableCollection<UserInfos> UserInformationList { get; set; }

逻辑实现

后台实现-数据添加：这里有几个页面就add几组数据

代码语言：javascript复制

  try
            {
                UserInformationList = new BindableCollection<UserInfos>();
                UserInformationList.Add(new UserInfos()
                {
                    Header = 1,
                    UserName = "张三",
                    EventAggregatorViewModel = new EventAggregatorViewModel()
            }); 
                UserInformationList.Add(new UserInfos()
                {
                    Header = 2,
                    UserName = "李四",
                    EventAggregatorViewModel = new EventAggregatorViewModel()
            });
                UserInformationList.Add(new UserInfos()
                {
                    Header = 3,
                    UserName = "王五",
                    EventAggregatorViewModel = new EventAggregatorViewModel()
            });
            }
            catch (Exception ex)
            {
                MessageBox.Show($"{ex}");
            }

item删除：这里通过前台绑定事件实现

代码语言：javascript复制

public void RemoveItem(object dataContext)
        {
            var buttonContext = dataContext as SimpleButton;
            var item = buttonContext.DataContext as UserInfos;
            loginfo.Debug($"Enter [RemoveItem] Header = [{item.Header}]");
            UserInformationList.Remove(item);
            loginfo.Debug($"Leave [RemoveItem].");
        }

前台XAML:这里标题和Item信息都通过模板实现

代码语言：javascript复制

 <dx:DXTabControl  ItemsSource="{Binding UserInformationList}">
            <dx:DXTabControl.ItemHeaderTemplate>
                <DataTemplate>
                    <dxlc:LayoutItem Label="{Binding UserName}">
                        <dx:SimpleButton
                            Margin="5,0,0,0"
                            cal:Message.Attach="[Event Click] = [Action RemoveItem($source)]"
                            Content="×" />
                    </dxlc:LayoutItem>
                </DataTemplate>
            </dx:DXTabControl.ItemHeaderTemplate>
            <dx:DXTabControl.ItemTemplate>
                <DataTemplate>
                    <ContentControl  cal:View.Model="{Binding EventAggregatorViewModel}" />
                </DataTemplate>
            </dx:DXTabControl.ItemTemplate>
        </dx:DXTabControl>

效果演示

add header viewmodel xaml 后台

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