防止在Razor页面中自动传递URL参数 [英] Prevent automatic passing of URL parameter in Razor Pages

问题描述

我正在为Web应用程序使用.NET Core 2"Razor Pages"格式.它允许您使用顶部的简单指令定义如何将URL映射到变量名称:

I'm using the .NET Core 2 "Razor Pages" format for a web app. It allows you to define how to map the URL to variable names with a simple directive at the top:

@page "{personId:int?}"

例如，上面的代码会将URL /Person/Index/123 映射到 IndexModel.OnGetAsync(int personId)函数，从而使 personId 的值为123.

The above, for example, would map the URL /Person/Index/123 to the IndexModel.OnGetAsync(int personId) function so that personId would have a value of 123.

但是，我注意到，如果页面上存在链接，这些值似乎会自动添加到可能的任何URL中.如果我将以下内容添加到索引"页面:

However, I've noticed that these values seem to be automatically added to any URL they could be, if a link exists on the page. If I add the following to the Index page:

<a asp-page="/Person/Details">Details</a>

…生成的实际HTML是:

…the actual HTML that's generated is:

<a href="/Person/Details/123">Details</a>

…意味着由于索引"和详细信息"页面的顶部都具有相同的指令，因此 personId 的值会在它们之间隐式传递.

…meaning that because both the Index and Details pages have the same directive at the top, the value of personId is implicitly passed between them.

有什么方法可以防止这种情况，以便 asp-page ="/Person/Details" 可以直接重定向到详细信息"页面，而无需传递 personId 的任何值?

Is there any way to prevent this, so that asp-page="/Person/Details" would simply redirect to the Details page without any value passed for personId?

推荐答案

对于 Asp.Net Core ，当前请求的当前路由值被视为链接生成的环境值.

For Asp.Net Core, the current route values of the current request are considered ambient values for link generation.

对于您的情况， personId 的123将被重新用于< asp-page ="/Person/Details"> Details</a> 链接生成.

For your scenario, 123 for personId will be reused for <a asp-page="/Person/Details">Details</a> link generation.

在此网址生成过程中，您可以尝试从 RouteData

From this url generation process, you could try to remove the value from RouteData

        public async Task OnGetAsync(int? personId)
    {
        Person = await _context.Person.ToListAsync();
        RouteData.Values.Remove("personId");
    }

对于另一种更好的方法，您可以尝试从url生成中删除该值.

For another better way, you could try to remove the value from url generation.

<a asp-page="/Person/Details" asp-route-personId="">Details</a>

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