c# - 如何将 Kendo UI Grid 与 ToDataSourceResult()、IQueryable、ViewModel 和 AutoMapper 一起使用？

Question

使用以下类加载/过滤/排序剑道网格的最佳方法是什么:

域:

public class Car
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual bool IsActive { get; set; }
}

View 模型

public class CarViewModel
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual string IsActiveText { get; set; }
}

自动映射器

Mapper.CreateMap<Car, CarViewModel>()
      .ForMember(dest => dest.IsActiveText, 
                 src => src.MapFrom(m => m.IsActive ? "Yes" : "No"));

可查询

var domainList = RepositoryFactory.GetCarRepository().GetAllQueryable();

数据源结果

var dataSourceResult = domainList.ToDataSourceResult<Car, CarViewModel>(request, 
                          domain => Mapper.Map<Car, ViewModel>(domain));

网格

...Kendo()
  .Grid<CarViewModel>()
  .Name("gridCars")
  .Columns(columns =>
  {
     columns.Bound(c => c.Name);
     columns.Bound(c => c.IsActiveText);
  })
  .DataSource(dataSource => dataSource
     .Ajax()
     .Read(read => read.Action("ListGrid", "CarsController"))
  )
  .Sortable()
  .Pageable(p => p.PageSizes(true))

好的，网格第一次完美加载，但是当我按 IsActiveText 过滤/排序时，我收到以下消息:

Invalid property or field - 'IsActiveText' for type: Car

在这种情况下最好的方法是什么？

Answer 1

我不喜欢 Kendo 实现“DataSourceRequestAttribute”和“DataSourceRequestModelBinder”的方式，但那是另一回事了。

要能够按“扁平化”对象的 VM 属性进行过滤/排序，请尝试以下操作:

领域模型:

public class Administrator
{
    public int Id { get; set; }

    public int UserId { get; set; }

    public virtual User User { get; set; }
}

public class User
{
    public int Id { get; set; }

    public string UserName { get; set; }

    public string Email { get; set; }
}

查看模型:

public class AdministratorGridItemViewModel
{
    public int Id { get; set; }

    [Displaye(Name = "E-mail")]
    public string User_Email { get; set; }

    [Display(Name = "Username")]
    public string User_UserName { get; set; }
}

扩展:

public static class DataSourceRequestExtensions
{
    /// <summary>
    /// Enable flattened properties in the ViewModel to be used in DataSource.
    /// </summary>
    public static void Deflatten(this DataSourceRequest dataSourceRequest)
    {
        foreach (var filterDescriptor in dataSourceRequest.Filters.Cast<FilterDescriptor>())
        {
            filterDescriptor.Member = DeflattenString(filterDescriptor.Member);
        }

        foreach (var sortDescriptor in dataSourceRequest.Sorts)
        {
            sortDescriptor.Member = DeflattenString(sortDescriptor.Member);
        }
    }

    private static string DeflattenString(string source)
    {
        return source.Replace('_', '.');
    }
}

属性:

[AttributeUsage(AttributeTargets.Method)]
public class KendoGridAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        base.OnActionExecuting(filterContext);

        foreach (var sataSourceRequest in filterContext.ActionParameters.Values.Where(x => x is DataSourceRequest).Cast<DataSourceRequest>())
        {
            sataSourceRequest.Deflatten();
        }
    }
}

Ajax 数据加载的 Controller 操作:

[KendoGrid]
public virtual JsonResult AdministratorsLoad([DataSourceRequestAttribute]DataSourceRequest request)
    {
        var administrators = this._administartorRepository.Table;

        var result = administrators.ToDataSourceResult(
            request,
            data => new AdministratorGridItemViewModel { Id = data.Id, User_Email = data.User.Email, User_UserName = data.User.UserName, });

        return this.Json(result);
    }