在layer弹出层中通过ajax返回html拼接字符串填充数据的方法

 @foreach (var perm in ViewBag.allPerms)
 {
  <input type="checkbox" id="permissionIds_@perm.Id" 
   name="PermissionIds" value="@perm.Id" 
 checked="@(ViewBag.RolePerms.Select(r=>r.Id).Contains(perm.Id))"/>
   <label for="permissionIds_@perm.Id">@perm.Name</label>
 }

 //填充角色数据并显示
 public ActionResult Edit(long roleId = 0)
 {
  if (roleId == 0)
  {
   return Json(new JsonData { State = 0, ErrorMsg = "角色不存在！" });
   }
   var role = RoleService.GetById(roleId);
   if (role==null)
  {
   return Json(new JsonData { State = 0, ErrorMsg = "角色Id不存在！" });
   }
   var allPerms = PermissionService.GetAll();
   var rolePerms = PermissionService.GetByRoleId(roleId);
   RoleEditGetModel model = new RoleEditGetModel();
   model.RolePerms = rolePerms;
   model.AllPerms = allPerms;
   return Json(new JsonData { State = 1, Data = model });
 }

success: function (layero, index) {
     //填充数据
     $.ajax({
      url: "/Role/Edit?roleId=" + id,
      type: "post",
      dataType: "json",
      success: function (res) {
       if (res.State == 1) {
        var html = "";
        var bool = false;
        for (var i = 0; i < res.Data.AllPerms.length; i++) {
         bool = false;
         for (var j = 0; j < res.Data.RolePerms.length; j++) {
          if (res.Data.RolePerms[j].Id == res.Data.AllPerms[i].Id) {
           bool = true;
           break;
          }
         }
         html += ' <input ' + (bool ? "checked" : "") + ' type="checkbox" id="permissionIds_' + res.Data.AllPerms[i].Id + '" name="PermissionIds" value="' + res.Data.AllPerms[i].Id + '" /> 
         <label for="permissionIds_' + res.Data.AllPerms[i].Id + '">' + res.Data.AllPerms[i].Name + '</label>'
        }
        $("#formValue").html(html);
       }
      },
      error: function () {
       layer.alert('网络请求失败！', {
        title: '提示框',
        icon: 0,
       });
      }
     });
    },