如何在ASP.NET MVC Web API中為返回動態的OData服務啟用排序

Question

這是我的控制器的代碼：

public class RegularGrigController : ApiController
    {
        // GET api/regulargrig
        public IEnumerable<string> Get()
        {
            return EntityHelper.GetEntities().Select(t => t.ModelName());
        }

        public PageResult<dynamic> Get(string entityName, ODataQueryOptions options)
        {
            var query = EntityHelper.GetQueryable(entityName).Select("new (Id, SysName)"); // Dynamic queryable

            IQueryable results = options.ApplyTo(query); // Exception here

            return new PageResult<dynamic>(results as IEnumerable<dynamic>, Request.GetNextPageLink(), Request.GetInlineCount());
        }
    }

當我嘗試撥打此電話時/api/RegularGrig?entityName=SecurityPrincipal&$orderby=Id

我收到此例外

Type 'System.Object' does not have a property 'Id'

那么，有什么方法可以對動態數據進行排序/過濾？

Answer 1

該代碼現在對我有用：

public PageResult<dynamic> Get(string entityName)
{
    var query = EntityHelper.GetQueryable(entityName).Select("new (Id, SysName)");
    var modelBuilder = new ODataConventionModelBuilder();
    modelBuilder.AddEntity(query.ElementType);
    var model = modelBuilder.GetEdmModel();
    var options = new ODataQueryOptions(new ODataQueryContext(model, query.ElementType), this.Request);
    IQueryable results = options.ApplyTo(query);

    return new PageResult<dynamic>(results as IEnumerable<dynamic>, Request.GetNextPageLink(), Request.GetInlineCount());
}