这是我的 Controller 的代码:
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());
}
}
当我尝试调用 /api/RegularGrig?entityName=SecurityPrincipal&$orderby=Id
我收到这个异常
Type 'System.Object' does not have a property 'Id'
那么,有没有办法对动态数据进行排序/过滤呢?
最佳答案
这段代码现在对我有用:
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());
}
关于c# - 如何在 asp.net mvc web api 中为返回动态的 OData 服务启用排序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15764215/