Ajax form validation after MVC meets bootstrap

@model object

<p class="form-group@(Html.ValidationErrorFor(m => m, " has-error"))">

  @Html.LabelFor(m => m, new { @class = "control-label" })

  <p class="controls">

    @Html.TextBox(

      "",

      ViewData.TemplateInfo.FormattedModelValue,

      ViewBag.ClearTextField == true ? new { @class = "form-control clear-text-field input-block-level" } : new { @class = "form-control input-block-level" } )

    @Html.ValidationMessageFor(m => m, null, new { @class = "help-block" })

  </p>

</p>

public static MvcHtmlString ValidationError(this HtmlHelper htmlHelper, string field, string error)

{

  if (HasError(htmlHelper, ModelMetadata.FromStringExpression(field, htmlHelper.ViewData), field))

    return new MvcHtmlString(error);

  else

    return null;

}

<p class="form-group@(Html.ValidationError("Department", " has-error"))">

  <label class="control-label" for="DepartmentId">所在部门</label>

  <p class="controls">

    <span id="deptname"> </span><a id="btnSelectDepartment">选择部门</a>

    <input class="form-control" data-val="true" data-val-required="部门是必需的。" id="DepartmentId" name="DepartmentId" type="hidden" value="">

    @Html.ValidationMessage("Department", null, new { @class = "help-block" })

  </p>

</p>

//ready

      var $puserform = $("#puserform");

      $puserform.dialog({

        title: '新建用户',//.....

      });

      $("#btnCreateUser").click(function () {

        var nodes = zTreeObjleft.getSelectedNodes();

        if (nodes.length > 0) {

          CreateUserForm($puserform);

        }

      })

function CreateUserForm(form) {

      var $puserform = form;

      $.ajax({

        url: "CreateUser",

        success: function (html) {

          CreateUserFormSuccessCallback(html, $puserform);

        }

      });

    }

    function InitSelectDepartmentWhenCreateUser() {

      $("#btnSelectDepartment").departmentSelection({

        onSelected: function (name, id) {

          $("#deptname").text(name);

          $("#DepartmentId").val(id);

        }

      });

    }

    function CreateUserFormSuccessCallback(html, form) {

      var $puserform = form;

      $puserform.children().children().html(html);

      $("#puserform").dialog("open");

      var $form = $puserform.find("form")

      InitSelectDepartmentWhenCreateUser();

      $form.submit(function () {

        $form.ajaxSubmit(function (data) {

          if (data == "success") {

            $("#puserform").dialog("close");

            $("#puserform").clearForm();

          }

          else {

            CreateUserFormSuccessCallback(data, form);

          }

        });

        event.preventDefault();

      });

    }

if (!DepartmentId.HasValue)

{

  ModelState.AddModelError("Department", "必须选择部门");

}

if (ModelState.IsValid)

{

  user.Id = Guid.NewGuid();

  user.CreateTime = DateTime.Now;

  if (DepartmentId.HasValue)

  {

    var dept = new DeptUserRole();

    dept.DepartmentId = DepartmentId.Value;

    dept.IsMain = true;

    dept.RoleId = RoleId.Value;

    user.DeptUserRoles.Add(dept);

  }

  db.Users.Add(user);

  await db.SaveChangesAsync();

  return Content("success");

}

return View(user);