你当前正在访问 Microsoft Azure Global Edition 技术文档网站。 如果需要访问由世纪互联运营的 Microsoft Azure 中国技术文档网站，请访问 https://docs.azure.cn。

DeviceManagementClient.GetDeviceClassAsync(String, RequestContext) 方法

定义

命名空间:

Azure.IoT.DeviceUpdate

程序集:

Azure.IoT.DeviceUpdate.dll

包:

Azure.IoT.DeviceUpdate v1.0.0

Source:

DeviceManagementClient.cs

获取设备类的属性。

public virtual System.Threading.Tasks.Task<Azure.Response> GetDeviceClassAsync (string deviceClassId, Azure.RequestContext context = default);

abstract member GetDeviceClassAsync : string * Azure.RequestContext -> System.Threading.Tasks.Task<Azure.Response>
override this.GetDeviceClassAsync : string * Azure.RequestContext -> System.Threading.Tasks.Task<Azure.Response>

Public Overridable Function GetDeviceClassAsync (deviceClassId As String, Optional context As RequestContext = Nothing) As Task(Of Response)

参数

deviceClassId

String

设备类标识符。

context

RequestContext

请求上下文，可以基于每个调用替代客户端管道的默认行为。

返回

Task<Response>

从服务返回的响应。 响应正文架构的详细信息，请参阅下面的“备注”部分。

例外

ArgumentNullException

deviceClassId 为 null。

ArgumentException

deviceClassId 是一个空字符串，预期为非空。

RequestFailedException

服务返回了非成功状态代码。

示例

此示例演示如何使用所需的参数调用 GetDeviceClassAsync 并分析结果。

var credential = new DefaultAzureCredential();
var endpoint = new Uri("<https://my-service.azure.com>");
var client = new DeviceManagementClient(endpoint, "<instanceId>", credential);

Response response = await client.GetDeviceClassAsync("<deviceClassId>");

JsonElement result = JsonDocument.Parse(response.ContentStream).RootElement;
Console.WriteLine(result.GetProperty("deviceClassId").ToString());
Console.WriteLine(result.GetProperty("friendlyName").ToString());
Console.WriteLine(result.GetProperty("deviceClassProperties").GetProperty("contractModel").GetProperty("id").ToString());
Console.WriteLine(result.GetProperty("deviceClassProperties").GetProperty("contractModel").GetProperty("name").ToString());
Console.WriteLine(result.GetProperty("deviceClassProperties").GetProperty("compatProperties").GetProperty("<test>").ToString());
Console.WriteLine(result.GetProperty("bestCompatibleUpdate").GetProperty("updateId").GetProperty("provider").ToString());
Console.WriteLine(result.GetProperty("bestCompatibleUpdate").GetProperty("updateId").GetProperty("name").ToString());
Console.WriteLine(result.GetProperty("bestCompatibleUpdate").GetProperty("updateId").GetProperty("version").ToString());
Console.WriteLine(result.GetProperty("bestCompatibleUpdate").GetProperty("description").ToString());
Console.WriteLine(result.GetProperty("bestCompatibleUpdate").GetProperty("friendlyName").ToString());

注解

下面是响应有效负载的 JSON 架构。

响应正文：

的 DeviceClass架构：

{
              deviceClassId: string, # Required. The device class identifier. This is generated from the model Id and the compat properties reported by the device update agent in the Device Update PnP interface in IoT Hub. It is a hex-encoded SHA1 hash.
              friendlyName: string, # Optional. The device class friendly name. This can be updated by callers after the device class has been automatically created.
              deviceClassProperties: {
                contractModel: {
                  id: string, # Required. The Device Update agent contract model Id of the device class. This is also used to calculate the device class Id.
                  name: string, # Required. The Device Update agent contract model name of the device class. Intended to be a more readable form of the contract model Id.
                }, # Optional. The Device Update agent contract model.
                compatProperties: Dictionary<string, string>, # Required. The compat properties of the device class. This object can be thought of as a set of key-value pairs where the key is the name of the compatibility property and the value is the value of the compatibility property. There will always be at least 1 compat property
              }, # Required. The device class properties that are used to calculate the device class Id
              bestCompatibleUpdate: {
                updateId: {
                  provider: string, # Required. Update provider.
                  name: string, # Required. Update name.
                  version: string, # Required. Update version.
                }, # Required. Update identifier.
                description: string, # Optional. Update description.
                friendlyName: string, # Optional. Friendly update name.
              }, # Optional. Update that is the highest version compatible with this device class.
            }