Question

我正在尝试将一些模拟数据推送到天蓝色的iot集线器，并使用天蓝色的函数（C＃）将接收到的数据存储到mongo db中的iot集线器。可以接收直到天蓝色功能的IoT中心消息。当我尝试按如下所示将它们推送到mongo db时，它出现以下错误。在执行此操作时，我遵循了this教程。

我的run.csx

using System;
using System.Runtime.Serialization;
using System.ServiceModel.Description;
using MongoDB.Bson.IO;
using MongoDB.Bson;
using MongoDB;
using MongoDB.Driver;
using System.Security.Authentication;
using System.Text;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

public static void Run(string myIoTHubMessage, TraceWriter log)
{
    log.Info($"C# IoT Hub trigger function processed a message: {myIoTHubMessage}");
    string deviceId="",data="";
    var raw_obj=JObject.Parse(myIoTHubMessage);
    deviceId=(string)raw_obj["device_id"];
    data=(string)raw_obj["Data"];
    Cosmos cosmos= new Cosmos(deviceId,data);
    cosmos.pushData();
}

//CosmosDB class
public class Cosmos
{
    string deviceId="",data="";
    public BsonDocument document = new BsonDocument();
    public Cosmos(string deviceId, string data)
    {
        this.deviceId=deviceId;
        this.data=data;
    }
    public void pushData()
    {
        MainAsync().Wait();
    }
    public async Task MainAsync()
    {
        string connectionString = 
    @"mongodb://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    MongoClientSettings settings = MongoClientSettings.FromUrl(new MongoUrl(connectionString));
        settings.SslSettings = new SslSettings() { EnabledSslProtocols = SslProtocols.Tls12};
        var mongoClient = new MongoClient(settings);
        IMongoDatabase db = mongoClient.GetDatabase("iot");
        var icollection = db.GetCollection<BsonDocument>(deviceId);
        document.Add("Data",data);
        await icollection.InsertOneAsync(document);
    }

}

我的project.json文件

{
  "frameworks": {
    "net46":{
      "dependencies": {
        "Newtonsoft.Json": "10.0.3",
        "System.ServiceModel.Primitives":"4.4.0",
        "MongoDB.Bson": "2.4.0",
        "MongoDB.Driver": "2.4.0",
        "MongoDB.Driver.Core": "2.4.0"
      }
    }
   }
}

当我运行代码时，它会出现以下错误

2018-10-10T18:34:25.990 [Error] Function compilation error
2018-10-10T18:34:26.119 [Error] run.csx(3,27): error CS0234: The type or namespace name 'Description' does not exist in the namespace 'System.ServiceModel' (are you missing an assembly reference?)
2018-10-10T18:34:26.242 [Error] run.csx(4,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.332 [Error] run.csx(5,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.435 [Error] run.csx(6,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.548 [Error] run.csx(7,7): error CS0246: The type or namespace name 'MongoDB' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.666 [Error] run.csx(10,7): error CS0246: The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.771 [Error] run.csx(11,7): error CS0246: The type or namespace name 'Newtonsoft' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:26.828 [Warning] run.csx(13,48): warning CS0618: 'TraceWriter' is obsolete: 'Will be removed in an upcoming version. Use ILogger instead.'
2018-10-10T18:34:26.946 [Error] run.csx(28,12): error CS0246: The type or namespace name 'BsonDocument' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:27.058 [Error] run.csx(17,17): error CS0103: The name 'JObject' does not exist in the current context
2018-10-10T18:34:27.201 [Error] run.csx(28,40): error CS0246: The type or namespace name 'BsonDocument' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:27.304 [Error] run.csx(42,5): error CS0246: The type or namespace name 'MongoClientSettings' could not be found (are you missing a using directive or an assembly reference?)
2018-10-10T18:34:27.431 [Error] run.csx(42,36): error CS0103: The name 'MongoClientSettings' does not exist in the current context
2018-10-10T18:34:27.632 [Error] Executed 'Functions.EventHubTriggerCSharp1' (Failed, Id=32bc6c5d-73fa-4082-b74b-c86a901f6656)

有人可以帮助我解决此问题吗？

Answer 1

问题是由功能运行时的差异引起的。

您遵循的教程将在〜1运行时上创建函数，其中代码以.NET Framework为目标，而您创建的代码则在〜2运行时上运行，其在.NET Core env上运行。当我们创建一个新的Function应用程序时，默认情况下，其运行时默认设置为〜2。

解决方案是在门户网站的“应用程序设置”中将FUNCTIONS_EXTENSION_VERSION设置为~1。然后在功能面板上单击View Files并编辑function.json以使其在v1中起作用-将eventHubName更改为path。参见event hub trigger configuration。

还有一些改进，请删除project.json中上下文中未使用的那些以及System.ServiceModel.Primitives。 Newtonsoft.Json程序集存在但未添加到主机，需要显式引用它。

使用的汇编和命名空间

#r "Newtonsoft.Json"

using Newtonsoft.Json.Linq;
using MongoDB.Bson;
using MongoDB.Driver;
using System.Security.Authentication;

project.json。

{
  "frameworks": {
    "net46":{
      "dependencies": {
        "MongoDB.Bson": "2.7.0",
        "MongoDB.Driver": "2.7.0"
      }
    }
   }
}

Answer 2

如果您使用的是run.csx，则需要使用#r“导入”您引用的程序集。

The example below is from the documentation.

#r "System.Web.Http"

using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

public static Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)

在Azure函数中找不到类型或命名空间名称

2 个答案: