如何解决这个错误“找不到路径的一部分'C：\inetpub \wwwroot \ app_data \client_secret.json'" [英] How to solve this error "could not find a part of the path 'C:\inetpub\wwwroot\app_data\client_secret.json'"

问题描述

嗨
我有使用谷歌日历的问题。

当我调用日历页面时，系统抛出错误

Hi I have an issue where using the google calendar.
When I call the calendar Page, system throw the error "
"

System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\inetpub\wwwroot\App_Data\client_secret.json'.

请指教我



提前谢谢



maideen



我尝试过：

Please advice me

Thank you in advance

maideen

What I have tried:

<pre>Private Shared gFolder As String = System.Web.HttpContext.Current.Server.MapPath("/App_Data")

    Public Shared Function GetClientConfiguration() As GoogleClientSecrets
        Using stream = New FileStream(gFolder & "\client_secret.json", FileMode.Open, FileAccess.Read)
            Return GoogleClientSecrets.Load(stream)
        End Using
    End Function

推荐答案

尝试：

Try:

Private Shared gFolder As String = System.Web.HttpContext.Current.Server.MapPath("~/App_Data")

由于无法准确控制共享字段初始化程序运行，我倾向于避免使用 HttpContext.Current 。如果在请求上下文之外初始化类，则最终可能会出现 NullReferenceException ，这会使整个类在应用程序的生命周期内无法使用。



相反，映射方法内部的路径，并使用应用程序相对路径作为解决方案1建议：

Since you can't control precisely when a Shared field initializer runs, I'd be inclined to avoid using HttpContext.Current from one. If the class is initialized outside of a request context, you could end up with a NullReferenceException, which would then render your entire class unusable for the lifetime of your application.

Instead, map the path inside the method, and use an app-relative path as Solution 1 suggested:

Public Shared Function GetClientConfiguration() As GoogleClientSecrets
    Dim context As System.Web.HttpContext = System.Web.HttpContext.Current
    If context Is Nothing Then Throw New InvalidOperationException("Cannot call this method outside of a request.")
    
    Dim filePath As String = context.Server.MapPath("~/App_Data/client_secret.json")
    Using stream = File.OpenRead(filePath)
        Return GoogleClientSecrets.Load(stream)
    End Using
End Function

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