bootstrap下拉框多选以及搜索功能

 <div class="form-group">

//多选multiple  搜索data-live-search="true" 单选的话去掉multiple

 <select id="channel_idselect" name="channel_idselect" class="form-control selectpicker" title="全部平台" multiple data-live-search="true"> 
@foreach (erp_channel entity in ((IChannelService)this.ViewBag.IChannelService).GetPlatFormList()) { 
<option value="@entity.channel_id">@entity.channel_name</option> }
</div>
//jquery取值

var channel = $("#channel_idselect").val();
channel = (channel == null) ? "" : channel.join(\',\');
$(\'#channel_id\').val(channel);