從DNX遷移到ASP.NET Core 2.0時API丟失/更改

Question

我一直在努力將應用程序從過時的DNX遷移到ASP.NET Core 2.0。 這樣做時，發現名稱空間和API（例如Microsoft.AspNet到Microsoft.AspNetCore幾乎沒有變化。 盡管我已經能夠找到並修復大多數更改，但是以下更改對我造成了問題：

在從Route繼承的類中，在RouteAsync(RouteContext context)方法中，對於DNX，它是context.IsHandled = true; RouteAsync(RouteContext context) ，如何表示這已由ASP.NET Core 2.0處理？

我試圖從GitHub查找更改歷史記錄，但似乎與此無關。

Answer 1

不再需要從RouteAsync調用context.IsHandled 。 如果您不帶Task return ，則框架知道跳到下一條路線。 如果返回任務，則框架將處理（處理）該任務。

舊版DNX / MVC6 /預覽代碼

public async Task RouteAsync(RouteContext context)
{
    var requestPath = context.HttpContext.Request.Path.Value;

    if (!string.IsNullOrEmpty(requestPath) && requestPath[0] == '/')
    {
        // Trim the leading slash
        requestPath = requestPath.Substring(1);
    }

    // Get the page id that matches.
    TPrimaryKey id;

    //If this returns false, that means the URI did not match
    if (!GetPageList().TryGetValue(requestPath, out id))
    {
        return;
    }

    //Invoke MVC controller/action
    var oldRouteData = context.RouteData;
    var newRouteData = new RouteData(oldRouteData);
    newRouteData.Routers.Add(_target);

    newRouteData.Values["controller"] = _controller;
    newRouteData.Values["action"] = _action;

    // This will be the primary key of the database row.
    // It might be an integer or a GUID.
    newRouteData.Values["id"] = id;

    try
    {
        context.RouteData = newRouteData;
        await _target.RouteAsync(context);
    }
    finally
    {
        // Restore the original values to prevent polluting the route data.
        if (!context.IsHandled)
        {
            context.RouteData = oldRouteData;
        }
    }
}

新的.NET Core 1.x / .NET Core 2.x代碼

public async Task RouteAsync(RouteContext context)
{
    var requestPath = context.HttpContext.Request.Path.Value;

    if (!string.IsNullOrEmpty(requestPath) && requestPath[0] == '/')
    {
        // Trim the leading slash
        requestPath = requestPath.Substring(1);
    }

    // Get the page id that matches.
    TPrimaryKey id;

    //If this returns false, that means the URI did not match
    if (!GetPageList().TryGetValue(requestPath, out id))
    {
        return;
    }

    //Invoke MVC controller/action
    var routeData = context.RouteData;

    routeData.Values["controller"] = _controller;
    routeData.Values["action"] = _action;

    // This will be the primary key of the database row.
    // It might be an integer or a GUID.
    routeData.Values["id"] = id;

    await _target.RouteAsync(context);
}

此處有完整代碼（針對.NET Core 1/2更新）： 啟動后更改MVC6的路由集合