ActionResult<object> Returns 状态代码 200，ActionResult.Result.Value 确实包含正确的对象，但 ActionResult.Value 为 Null

Question

我有一个 Web api 方法，它获取一个对象，将对象保存到数据库，然后 return 使用 return new OkObjectResult(MyObject) 更新数据库对象。 .. 这非常有效（对象出现在数据库、PK 集和 returned 中）。

    public async Task<ActionResult<MyObject>> AddMyObject(MyObject, CancellationToken ct)
    {
       try
       {
           ......Add to DB, update PK in MyObject etc....
           return new OkObjectResult(MyObject);
       }
       catch (Exception ex)
       {
           ......
           return new BadRequestObjectResult("Unknown error adding MyObject to database");
       }
    }

但是，当我调用此方法时，ReturnedActionResultMyObject.Value 为空

ActionResult<MyObject> ReturnedActionResultMyObject  = await AddMyObject(MyObject, ct);
ActionResult ReturnedResult = ReturnedActionResultMyObject.Result;
MyObject ReturnedValue = ReturnedActionResultMyObject.Value;

ReturnedResult.StatusCode 是 200，ReturnedResult.Value 有正确的 MyObject，调试时可见。

我确定这应该有效，我应该能够获得 returned MyObject。

Answer 1

您需要将 ReturnedValue 转换为 MyObjectType 为

MyObject ReturnedValue = (MyObject)((Microsoft.AspNetCore.Mvc.ObjectResult)ReturnedResult).Value;

作为

ActionResult<MyObject> ReturnedActionResultMyObject = await AddMyObject(MyObject, ct);                 
ActionResult ReturnedResult = ReturnedActionResultMyObject.Result;                   
MyObject ReturnedValue = (MyObject)((Microsoft.AspNetCore.Mvc.ObjectResult)ReturnedResult).Value;

ActionResult<object> Returns 状态代码 200，ActionResult.Result.Value 确实包含正确的对象，但 ActionResult.Value 为 Null

ActionResult<object> Returns Status code 200, ActionResult.Result.Value does contain correct object, but ActionResult.Value is Null

actionresult

http-status-code-200

.net-core