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 = ; i < count; i++)
             {
                 var onepeopleitem = AllPeople.Items[i];
                 if (onepeopleitem.Selected)
                 {
                     NeedExamStaff.Items.Add(onepeopleitem);
                     list.Add(onepeopleitem);
                 }
             }
             for (int i = ; 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 = ; i < NeedExamStaff.Items.Count; i++)
             {
                 var onepeopleitem = NeedExamStaff.Items[i];
                 if (onepeopleitem.Selected)
                 {
                     AllPeople.Items.Add(onepeopleitem);
                     list.Add(onepeopleitem);
                 }
             }
             for (int i = ; 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 = ; i < count; i++)
             {
                 var onepeopleitem = AllPeople.Items[i];
                 NeedExamStaff.Items.Add(onepeopleitem);
                 list.Add(onepeopleitem);

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

         }