Question

我创建了一个OwinMiddleware来捕获我的api请求中所有未处理的异常。

 public class UnhandledExceptionMiddleware : OwinMiddleware
{
    private static readonly Logger logger = LogManager.GetCurrentClassLogger();

    public UnhandledExceptionMiddleware(OwinMiddleware next) : base(next)
    { }

    public override async Task Invoke(IOwinContext context)
    {
        try
        {
            await Next.Invoke(context);                
        }
        catch (Exception ex)
        {
            logger.Fatal(ex, ex.Message);
        }
    }
}

但是如果我在我的控制器函数中抛出一些错误，则不使用catch块，在这个中间件中看起来一切都很好。为什么不使用我的catch块？

更新

这是我的Owin Config。 Invoke方法仅适用于catch无法正常工作

public void Configuration(IAppBuilder app)
    {

        // Enables use of spatial data types
        SqlServerTypes.Utilities.LoadNativeAssemblies(HostingEnviron‌ment.MapPath("~/bin"));

        HttpConfiguration config = new HttpConfiguration();
        IContainer container = AutoFacConfig.Register(config, app);

        app.UseApplicationInsights();
        app.UseNLog();
        app.Use<UnhandledExceptionMiddleware>();

Answer 1

按照添加到管道的顺序调用中间件。确保在这种情况下，UnhandledExceptionMiddleware在启动期间添加public class Startup { public void Configuration(IAppBuilder app) { app.Use<UnhandledExceptionMiddleware>(); //...Add other middleware //...code removed for brevity } }之前

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="300dp"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="16dp">

        <TextView
            android:id="@+id/title"/>

    </LinearLayout>

    <RelativeLayout
        android:id="@+id/someid"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:visibility="gone"
        tools:visibility="gone">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="vertical"
            android:paddingLeft="16dp"
            android:paddingRight="16dp"
            android:visibility="visible">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="270dp"
                android:orientation="vertical"
                android:visibility="visible"
                tools:visibility="visible">


                <LinearLayout
                    android:id="@+id/editTextLayout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:visibility="gone"
                    tools:visibility="visible">

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="40dp"
                        android:layout_marginBottom="10dp"
                        android:layout_marginTop="13dp"
                        android:gravity="bottom"
                        android:orientation="horizontal">

                        <EditText
                            android:id="@+id/EditText"/>

                    </LinearLayout>

                </LinearLayout>

            </LinearLayout>

        </LinearLayout>

    </RelativeLayout>


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="40dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingLeft="16dp"
            android:paddingRight="16dp">

            <Button
                android:id="@+id/Button" />

        </LinearLayout>

        <View
            android:id="@+id/overlayButtons"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/white_70"
            android:visibility="gone"
            tools:visibility="gone" />

    </RelativeLayout>

</LinearLayout>

Answer 2

解决了这篇文章。 Disable *all* exception handling in ASP.NET Web API 2 (to make room for my own)?

您必须对默认的IExceptionFilter进行ovverride以捕获中间件中的异常。

我的OwinMiddleware没有发现例外情况

更新

2 个答案: