MVC实现下拉框联动效果（单选）

下拉框联动效果,我们以部门--职位为例,选择部门时,关联到该部门的职位.下拉框的写法就不多说了,详细请参照前文.

视图:

其中,dept是部门的属性,deptlist是部门下拉框的属性,job是职位的属性,joblist是职位下拉框的属性,下拉框绑定请参照前文

@using (html.beginform("aaai003sch", "aaa", formmethod.post, new { @class = "form-horizontal", role = "form" }))
{
 @html.antiforgerytoken()
 <div class="modal-body">
  <div class="form-horizontal">
    <div class="form-group">
     @html.labelfor(m => m.dept, new { @class = "col-sm-2 control-label" })
      <div class="col-sm-10">
       @html.dropdownlistfor(model => model.dept, model.deptlist, new { @class = "form-control select2 ", style = "width: 100%;" })
       @html.validationmessagefor(m => m.dept, "", new { @class = "text-danger" })
      </div>
    </div>
    <div class="form-group">
    @ html.labelfor(m => m.job, new { @class = "col-sm-2 control-label" })
      <div class="col-sm-10">
       @html.dropdownlistfor(model => model.job, model.joblist, new { @class = "form-control select2 page-select2-area", style = "width: 100%;" })
       @html.validationmessagefor(m => m.job, "", new { @class = "text-danger" })
      </div>
    </div>
  </div>
 </div>
</div>

当部门变动的时候,职位也相应改变:

//根据城市获取酒店
 $("#dept").change(function () {
  var url = rooturl + "aaa/getjobbydept";
   var dept = $(this).val(); //获取部门的值
   var job = $("#job");
   job.empty();  //清空当前职位的值
   //这句很重要，因我们用的是select2插件，若没有用这个插件可以去掉这句
   job.select2('val', '');
   $.ajax({
    cache: false,
    type: "get",
    url: url,
    data: { "dept": dept},
    success: function (data) {
     $.each(data, function (id, option) {

      job.append($('<option></option>').val(option.id).html(option.name));
     });
     job.trigger('change');
    },
    error: function (xhr, ajaxoptions, thrownerror) {
     toastr["error"]("请选择部门");
    }
   });
 });

执行js里的url,这个程式写在控制器里:

  [description("根据部门获取职位")]
  [acceptverbs(httpverbs.get)]
  [loginallowview]
  public actionresult getjobbydept(string dept)
  {
   if (string.isnullorempty(dept))
   {
    throw new argumentnullexception("dept");
   }
   stringbuilder sb = new stringbuilder();
   sb = new stringbuilder();
   sb.append(" select jobid,jobname ");
   sb.append(" from job_file ");
   sb.append(" left join dept_file on jobdept = deptid ");
   sb.appendformat(" where deptid='{0}'", dept);
   datatable dt = sqlhelper.getdata(sb.tostring());
   var result = dt.asenumerable().select(row => new item
   {
    name = utils.objtostr(row["jobname"]),
    id = utils.objtoint(row["jobid"], 0)
   }).tolist();
   return json(result, jsonrequestbehavior.allowget);
  }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。