使用 Nuget 安装的 .net 项目上的 Firebase Admin SDK 总是给我一个错误

Question

我正在尝试使用 nuget 在 .Net 应用程序上安装 Firebase Admin。一切看起来都不错：

引用指向正确的位置
包文件夹中填充了二进制文件
配置文件包含正确的引用并具有正确的版本
依赖都包含了
项目构建

但是，每次我尝试使用包含 FirebaseAdmin class 的方法时，它都会抛出 System.IO.FileNotFoundException。我尝试了很多解决方案：

正在重新安装所有软件包
清理解决方案然后重新安装
正在删除包文件夹并恢复包
在干净的环境中安装并手动引用 DLL

没有。还有其他人有这个错误吗？如果有，你是怎么解决的？

P.S。我对 Nuget 有点陌生。几年来，我一直在从事一个使用它的项目。我的理解是它应该是一个流线型和简单的包管理器。直到现在我还没有安装新包。我的经验不过如此——直到现在，了解一个所谓的优秀包管理器的来龙去脉一直是我优先考虑的事情。欢迎任何帮助，即使是相对明显的指示。

编辑 1：我知道 Firebase 需要初始化，但我一直在尝试将初始化放在模型的方法中而不是项目启动中。

namespace Sis.OneSis.Business.Models.Notification
{
    [DataContract]
    public class NotificationFramework
    {

    #region Methods
    public static void SendNotification(int userId, int siteId, int yearId, string enumeration, int object_ID, string payload)
    {

        try
        {
            // Running the stored procedure
            V10Data.V10DataContextProvider modelContainer = new V10Data.V10DataContextProvider();
            List<SqlParameter> parameterList = new List<SqlParameter>();
            parameterList.Add(new SqlParameter { ParameterName = "@Enumeration", Value = enumeration, SqlDbType = SqlDbType.VarChar, Direction = ParameterDirection.Input });
            parameterList.Add(new SqlParameter { ParameterName = "@Payload", Value = payload, SqlDbType = SqlDbType.Xml, Direction = ParameterDirection.Input });
            parameterList.Add(new SqlParameter { ParameterName = "@Object_ID", Value = object_ID, SqlDbType = SqlDbType.Int, Direction = ParameterDirection.Input });
            parameterList.Add(new SqlParameter { ParameterName = "@User_ID", Value = userId, SqlDbType = SqlDbType.Int, Direction = ParameterDirection.Input });
            parameterList.Add(new SqlParameter { ParameterName = "@Site_ID", Value = siteId, SqlDbType = SqlDbType.Int, Direction = ParameterDirection.Input });
            parameterList.Add(new SqlParameter { ParameterName = "@Year_ID", Value = yearId, SqlDbType = SqlDbType.Int, Direction = ParameterDirection.Input });
            DataSet dataSet = modelContainer.ExecuteGetProcedure("spNTF_ProcessNotification", parameterList);

            // Retrieving the notifications
            List<NotificationLogDTO> notificationLogs = new List<NotificationLogDTO>();
            foreach (DataRow row in dataSet.Tables[0].Rows)
            {
                NotificationLogDTO notificationLog = new NotificationLogDTO();
                notificationLog.ID = row.Field<int>("ID");
                notificationLog.NotificationType_ID = row.Field<int>("NotificationType_ID");
                notificationLog.NotificationEvent_ID = row.Field<int>("NotificationEvent_ID");
                notificationLog.User_ID = row.Field<int>("User_ID");
                notificationLog.Object_ID = row.Field<int>("Object_ID");
                notificationLog.Student_ID = row.Field<int?>("Student_ID");
                notificationLog.Message = row.Field<string>("Message");
                notificationLog.Subject = row.Field<string>("Subject");
                notificationLog.AddedOn = row.Field<DateTime>("AddedOn");
                notificationLog.AddedBy = row.Field<int>("AddedBy"); 
                notificationLog.EmailAddress = row.Field<string>("EmailAddress");
                notificationLogs.Add(notificationLog);
            }

            // Sending the notifications
            using (CrudEngine crudEngine = new CrudEngine())
            {
                string defaultEmailAddress = "noreply@tylertech.com";
                var version = Sis.OneSis.Server.Configuration.AppConfiguration.RetrieveResourceVersion();
                if (version != null)
                {
                    if (version.Value == "V9")
                    {
                        defaultEmailAddress = crudEngine.Read<V9DomainModel.tblDistrict>()
                            .Where(o => o.blnExternal == false)
                            .Select(o => o.strEmailDefaultEAddress)
                            .SingleOrDefault();
                    } else
                    {
                        defaultEmailAddress = crudEngine.Read<V10DomainModel.SystemSetting>()
                            .Select(o => o.NotificationEmail)
                            .SingleOrDefault();
                    }
                }
                Dictionary<int, List<NotificationLogDTO>> userMobileNotifications = new Dictionary<int, List<NotificationLogDTO>>();
                foreach (NotificationLogDTO notification in notificationLogs)
                {
                    switch (notification.NotificationType_ID)
                    {
                        // Email
                        case 1:
                            SendEmailParameters parameters = new SendEmailParameters();
                            parameters.EmailFrom = defaultEmailAddress;
                            parameters.EmailTo = notification.EmailAddress;
                            parameters.Body = notification.Message;
                            parameters.Subject = notification.Subject;
                            sendEmailDTO.SendEmail(parameters, -1, -1, -1, userId, "Classroom");
                            break;

                        // Mobile Notification
                        case 3:
                            if (!userMobileNotifications.Keys.Contains(notification.User_ID))
                            {
                                userMobileNotifications.Add(notification.User_ID, new List<NotificationLogDTO>());
                            }
                            userMobileNotifications[notification.User_ID].Add(notification);
                            break;
                    }
                }

                // Sending mobile notifications
                FirebaseApp firebaseApp = FirebaseApp.DefaultInstance;
                if (firebaseApp == null)
                {
                    DataTable credentials = modelContainer.ExecuteSqlQuery("SELECT TOP 1 * FROM NTF_FirebaseCredentials");
                    if (credentials.Rows.Count > 0)
                    {
                        string firebaseJSON = credentials.Rows[0].Field<string>("FirebaseJSON");
                        FirebaseApp.Create(new AppOptions()
                        {
                            Credential = GoogleCredential.FromJson(firebaseJSON),
                        });
                    }
                }
                FirebaseMessaging firebaseMessaging = FirebaseMessaging.DefaultInstance;
                if (firebaseMessaging == null)
                {
                    firebaseMessaging = FirebaseMessaging.GetMessaging(firebaseApp);
                }
                List<NotificationUserDevice> userDevices = NotificationUserDevice.GetUserDevices(userId, userMobileNotifications.Keys.ToList());
                List<Message> messages = new List<Message>();
                foreach (NotificationUserDevice userDevice in userDevices)
                {
                    List<NotificationLogDTO> notifications = userMobileNotifications[userDevice.User_ID];
                    foreach (NotificationLogDTO notification in notifications)
                    {
                        Message message = new Message();
                        message.Token = userDevice.DeviceToken;
                        FirebaseAdmin.Messaging.Notification mobileNotification = new FirebaseAdmin.Messaging.Notification();
                        mobileNotification.Title = notification.Subject;
                        mobileNotification.Body = notification.Message;
                        message.Notification = mobileNotification;
                    }
                }
                firebaseMessaging.SendAllAsync(messages);
            }
        }
        catch (Exception ex)
        {
            string errMsg = "An error occurred -";
            LogServices.Error(ex, "userId:{0}:customMessage:{1}:", userId, errMsg);
            throw ex;
        }
    }
}

Answer 1

您对 NuGet 的理解对于绝大多数包都是准确的，但是 FirebaseAdmin 需要一些额外的 set-up。

这里详细描述了整个过程：https://firebase.google.com/docs/admin/setup#initialize-sdk

我会在这里指出最重要的事情（如 TL;DR）。首先，您需要一个 json 文件形式的 firebase 私钥（在“初始化 SDK”下的 link 中简要描述了这些步骤）。之后，确保在调用任何与 firebase 相关的函数之前运行这段代码。

FirebaseApp.Create(new AppOptions()
{
    Credential = GoogleCredential.FromFile("path/to/what/you/downlowded.json"),
});

希望这能解决您的问题。

Answer 2

我发现了我遇到的问题。我们的一个解决方案被构建到一个单独的项目中，该项目被 IIS 引用。该项目需要对 DLL 的手动引用，因此我手动更新了该项目的引用并从那里开始工作。如果您正在处理具有多个解决方案的分层项目，这也适用于您。

使用 Nuget 安装的 .net 项目上的 Firebase Admin SDK 总是给我一个错误

Firebase Admin SDK on .net Project installed with Nuget always gives me an error

.net

c#

nuget

firebase

firebase-admin