c# - 从 ObjectResult 获取值

Question

我有一个像这样的过滤器:

public class Err : ActionFilterAttribute
{
    public override void OnActionExecuted(ActionExecutedContext context)
    {
        var result = context.Result;
    }
}

result 是 Microsoft.AspNetCore.Mvc.BadRequestObjectResult 的对象。它包含一个 StatusCode 和一个 Value，但是当我尝试像这样提取它们时:context.Result.Value，我得到这个错误:

Error CS1061 'IActionResult' does not contain a definition for 'Value' and no accessible extension method 'Value' accepting a first argument of type 'IActionResult' could be found.

Answer 1

这很简单 - ActionExecutedContext 的属性 Result 具有 IActionResult 类型，而没有属性 Value。您可以将其转换为 BadRequestObjectResult 以访问 Value 属性:

public class Err : ActionFilterAttribute
{
    public override void OnActionExecuted(ActionExecutedContext context)
    {
        var result = context.Result as BadRequestObjectResult;
        // you can access result.Value here
    }
}