Backup/MyFriends/Controls/ViewAllUsersControl.xaml.cs

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using System;
using System.IO;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Linq;
using System.Data.Linq;
using System.Xml.Linq;
using System.Xml;
using System.Collections;
using System.Collections.Generic;

//Xceed.Wpf.DataGrid
using Xceed.Wpf.DataGrid;
using Xceed.Wpf.DataGrid.Views; 

namespace MyFriends
{
    public partial class ViewAllUsersControl
	{

        public bool doingInitializeComponent = false;
        public bool showGroupByControl = true;

        public ViewAllUsersControl()
		{
			this.InitializeComponent();
            DataBind();
        }


        public void DataBind()
        {
            dgFriends.ItemsSource = FriendsList.Instance();
        }

        public void SetExpandState(bool expanded)
        {
            dgFriends.Height += expanded ? 100 : -100;
        }

        private void DeleteSelectedRows(object sender, System.Windows.Input.KeyEventArgs e)
        {
            //获取当前的DataGridControl控件
            DataGridControl grid = sender as DataGridControl;
            //判断当前行是否处于编辑状态
            if (!grid.IsBeingEdited)
            {
                if (grid != null)
                {//判断用户是否键入了Delete键。
                    if (e.Key == System.Windows.Input.Key.Delete)
                    {//如果选择了多个行
                        if (grid.SelectedItems.Count > 0)
                        {
                            //首先返回一个当前选择项的幅本