listBox 搜索左右移动

<td align="left" width="50%"> 
            查询：<asp:TextBox ID="SacffSearch" runat="server" Width="54px"></asp:TextBox><asp:Button runat="server" Text="搜索" id="tbnSearch" OnClick="tbnSearch_Click"></asp:Button>
             <asp:ListBox ID="AllPeople" runat="server" Height="100px" Width="148px" AutoPostBack="true" SelectionMode="Multiple" OnSelectedIndexChanged="AllPeople_SelectedIndexChanged"></asp:ListBox>
        </td> 

 listbox左右移动带搜索功能

后台代码

 protected void PersonLMove_Click(object sender, EventArgs e)
        {
            IList<ListItem> list = new List<ListItem>();
            var count = AllPeople.Items.Count;
            for (int i = 0; i < count; i++)
            {
                var onepeopleitem = AllPeople.Items[i];
                if (onepeopleitem.Selected)
                {
                    NeedExamStaff.Items.Add(onepeopleitem);
                    list.Add(onepeopleitem);
                }
            }
            for (int i = 0; i < list.Count(); i++)
            {
                AllPeople.Items.Remove(list[i]);
            }
            NeedStaffNumber.Text = NeedExamStaff.Items.Count.ToString();

        }

        protected void PersonRMove_Click(object sender, EventArgs e)
        {
            IList<ListItem> list = new List<ListItem>();
            var count = NeedExamStaff.Items.Count;
            for (int i = 0; i < NeedExamStaff.Items.Count; i++)
            {
                var onepeopleitem = NeedExamStaff.Items[i];
                if (onepeopleitem.Selected)
                {
                    AllPeople.Items.Add(onepeopleitem);
                    list.Add(onepeopleitem);
                }
            }
            for (int i = 0; i < list.Count(); i++)
            {
                NeedExamStaff.Items.Remove(list[i]);
            }

            NeedStaffNumber.Text = NeedExamStaff.Items.Count.ToString();
        }

        protected void PersonLAll_Click(object sender, EventArgs e)
        {
            IList<ListItem> list = new List<ListItem>();
            var count = AllPeople.Items.Count;
            for (int i = 0; i < count; i++)
            {
                var onepeopleitem = AllPeople.Items[i];
                NeedExamStaff.Items.Add(onepeopleitem);
                list.Add(onepeopleitem);

            }
            for (int i = 0; i < list.Count(); i++)
            {
                AllPeople.Items.Remove(list[i]);
            }
            NeedStaffNumber.Text = NeedExamStaff.Items.Count.ToString();
        }

        protected void PersonRAll_Click(object sender, EventArgs e)
        {
            IList<ListItem> list = new List<ListItem>();
            var count = NeedExamStaff.Items.Count;
            for (int i = 0; i < NeedExamStaff.Items.Count; i++)
            {
                var onepeopleitem = NeedExamStaff.Items[i];
                AllPeople.Items.Add(onepeopleitem);
                list.Add(onepeopleitem);
            }
            for (int i = 0; i < list.Count(); i++)
            {
                NeedExamStaff.Items.Remove(list[i]);
            }

            NeedStaffNumber.Text = NeedExamStaff.Items.Count.ToString();
        }

  protected void tbnSearch_Click(object sender, EventArgs e)
        {
            var searchContnet = this.SacffSearch.Text.TrimEnd(',').Split(',');
            var count = AllPeople.Items.Count;

            for (int k = 0; k < searchContnet.Length; k++)
            {
                var j = 0;
                for (int i = 0; i < count; i++)
                {
                    if (AllPeople.Items[i].Text.Trim() == searchContnet[k].Trim())
                    {
                        AllPeople.Items[i].Selected = true;
                        AllPeople.SelectedIndex = i;
                        break;
                    }
                }
                if (AllPeople.SelectedIndex > 0)
                {
                    int idx = AllPeople.SelectedIndex;
                    var SelectedItem = AllPeople.SelectedItem;
                    AllPeople.Items.Insert(0, new ListItem(SelectedItem.Text, SelectedItem.Value));
                    AllPeople.Items.RemoveAt(AllPeople.SelectedIndex);
                    AllPeople.SelectedIndex = 0;
                }
            }

        }