XAF 如何实现两个ListView联动

最新推荐文章于 2021-01-20 20:15:43 发布

转载最新推荐文章于 2021-01-20 20:15:43 发布 · 212 阅读

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原文链接：http://www.cnblogs.com/Tonyyang/archive/2011/05/04/2036478.html

本文介绍如何使用 DevExpress 的 DashboardView 控件创建部门和员工的联动效果。通过编写 C# 代码实现当选择不同部门时，员工列表会根据所选部门进行过滤。

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例如：有部门和员工两个ListView

1. 首先用模型编辑器添加一个DashboardView1

2. 然后再给DashboardView1添加两个Item：Department_ListView 和 Employee_ListView;

3. 代码

using System;

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Editors;
using System.Collections;
using DevExpress.Data.Filtering;

namespace EasyTestTool.Module
{
    public partial class EmployeesDashboardInteractionController : ViewController<DashboardView>
    {
        public EmployeesDashboardInteractionController()
        {
            InitializeComponent();
            RegisterActions(components);
        }

        private const string TargetDashboardId = "DashboardView1";
        private const string EmployeeCriteriaId = "SelectedDepartmentsCriteria";

        private ListView employeeListView;
        private ListView departmentListView;

        protected override void OnActivated()
        {
            base.OnActivated();

            if (View.Id == TargetDashboardId)
            {
                foreach (DashboardViewItem item in View.GetItems<DashboardViewItem>())
                {
                    item.ControlCreated += item_ControlCreated;
                }
            }
        }

        void item_ControlCreated(object sender, EventArgs e)
        {
            DashboardViewItem item = ((DashboardViewItem)sender);

            if (item.Frame.View.Id == "Department_ListView")
            {
                departmentListView = (ListView)item.Frame.View;
                departmentListView.SelectionChanged += departmentListView_SelectionChanged;
            }

            if (item.Frame.View.Id == "Employee_ListView")
            {
                employeeListView = (ListView)item.Frame.View;
            }
        }

        void departmentListView_SelectionChanged(object sender, EventArgs e)
        {
            ArrayList keys = new ArrayList();
            object selectObject = null;
            foreach (object selectedObejct in ((ListView)sender).SelectedObjects)
            {
                if (selectedObejct != null)
                    keys.Add(ObjectSpace.GetKeyValue(selectedObejct));
            }

            FilterEmployeeListView(new InOperator("Department", keys));
       }



        private void FilterEmployeeListView(CriteriaOperator criteria)
        {
            employeeListView.CollectionSource.Criteria[EmployeeCriteriaId] = criteria;
        }

        protected override void OnDeactivated()
        {
            base.OnDeactivated();

            if (View.Id == TargetDashboardId)
            {
                foreach (DashboardViewItem item in View.GetItems<DashboardViewItem>())
                {
                    item.ControlCreated -= item_ControlCreated;
                }

                if(departmentListView != null)
                {
                    departmentListView.SelectionChanged -= departmentListView_SelectionChanged;
                }
            }

        }
    }
}

转载于:https://www.cnblogs.com/Tonyyang/archive/2011/05/04/2036478.html