C# 项目找不到 Google Vision 的GOOGLE_APPLICATION_CREDENTIALS

Question

我正在尝试在我的C#项目中使用google的vision api。我正在使用他们提供的测试代码，但由于某种原因，我的代码找不到google_application_credentials这是错误：

应用程序默认凭据不可用。如果在 Google Compute Engine 中运行，它们可用。否则，必须定义环境变量GOOGLE_APPLICATION_CREDENTIALS，指向定义凭据的文件。有关详细信息，请参阅 https://developers.google.com/accounts/docs/application-default-credentials。

这是代码：

using System;
using Google.Cloud.Vision.V1;
namespace Test
{
    public class Vision
    {
        public static void Main(String[] args)
        {
            // Instantiates a client
            var client = ImageAnnotatorClient.Create();
            // Load the image file into memory
            var image = Image.FromFile("wakeupcat.jpg");
            // Performs label detection on the image file
            var response = client.DetectLabels(image);
            foreach (var annotation in response)
            {
                if (annotation.Description != null)
                    Console.WriteLine(annotation.Description);
            }
        }
    }
}

文档(https://cloud.google.com/vision/docs/reference/libraries(告诉我导出环境变量GOOGLE_APPLICATION_CREDENTIALS这就是我所做的。但我仍然收到上面的错误。请帮忙！

Answer 1

从Google Cloud Vision中的服务帐户下载JSON文件，放入本地系统，然后进行检查。这将起作用。

using System;
using Google.Cloud.Vision.V1;
namespace Test
{
    public class Vision
    {
        public static void Main(String[] args)
        {
            // set this environment
            Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", @"C:UsersuserDesktop.....json");
            // Instantiates a client
            var client = ImageAnnotatorClient.Create();
            // Load the image file into memory
            var image = Image.FromFile("wakeupcat.jpg");
            // Performs label detection on the image file
            var response = client.DetectLabels(image);
            foreach (var annotation in response)
            {
                if (annotation.Description != null)
                    Console.WriteLine(annotation.Description);
            }
        }
    }
}