Azure Functions 中是否可以进行属性路由 [英] Is Attribute Routing possible in Azure Functions

问题描述

我正在尝试将路由参数强制为 guid 但低于错误

I am trying to enforce a route parameter to be guid but getting below error

"执行函数时出现异常:GetUser -> 一个或多个错误发生了.-> 异常绑定参数 'req' -> 来自的无效转换'System.String' 到 'System.Guid'."

"Exception while executing function: GetUser -> One or more errors occurred. -> Exception binding parameter 'req' -> Invalid cast from 'System.String' to 'System.Guid'."

public static async Task<HttpResponseMessage> Run(
            [HttpTrigger(AuthorizationLevel.Admin, "get", Route = "GetUser/{userId:guid}")] HttpRequestMessage req,
            Guid userId, ILogger log)
        {
        }

我提出的请求是 http://localhost:7071/api/GetUser/246fb962-604d-4699-9443-fa3fa840e9eb/

我错过了什么吗?我们不能强制路由参数为 guid 吗?

Am i missing some thing? Cannot we enforce route parameter to be guid ?

推荐答案

从System.String"到System.Guid"的无效转换

Invalid cast from 'System.String' to 'System.Guid'

在我这边的 Azure httptrigger 函数中使用路由约束 {userId:guid} 可以重现同样的问题，您可以尝试 打开问题以提供反馈.

I can reproduce same issue when use Route constraint {userId:guid} in Azure httptrigger function on my side, you can try to open an issue to give a feedback.

此外，如果可能，您可以尝试调用 Guid.TryParse 方法 将字符串转换回函数代码中的 Guid 值，以下代码供您参考.

Besides, if possible, you can try to call Guid.TryParse method to convert the string back to Guid value in function code, the following code is for your reference.

public static string Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = "GetUser/{userId:guid}")]HttpRequestMessage req, string userId, TraceWriter log)
{
    log.Info("C# HTTP trigger function processed a request.");

    Guid newGuid;

    var resmes = "";

    if (Guid.TryParse(userId, out newGuid))
    {
        resmes = "userid: " + newGuid;
    }
    else {
        resmes = "error";
    }

    return resmes;
}

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