本文屬於將資料推送至資料集逐步解說的一部分。

在<將資料推送至資料集>的步驟 3 在 Power BI 中建立資料集中,您呼叫了建立資料集作業,以在 Power BI 中建立資料集。 在此步驟中,您會使用取得資料集作業和 Newtonsoft.Json 來取得資料集識別碼。 您使用步驟 4 中的資料集識別碼將資料列加入資料集。 如需有關如何使用 Power BI REST API 的範例,請參閱 ARYAPIARY 上的 Power BI REST API

若要將資料推送至 Power BI 資料集,您需要參考資料集中的資料表。 若要參考資料集中的資料表,您首先需要取得 資料集識別碼。 您可使用取得資料集作業來取得資料集識別碼取得資料集作業會傳回 JSON 字串,包含 Power BI 中的所有資料集清單。 建議使用 Newtonsoft.Json 還原序列化 JSON 字串。

以下是取得資料集的方式。

取得 Power BI 資料集

注意:開始使用之前,請確定您已經執行過先前將資料推送至資料集逐步解說中的先前步驟。

  1. 在<步驟 2:推送資料的逐步解說>所建立主控台應用程式專案的取得驗證存取權杖中,安裝 Newtonsoft.Json NuGet 套件。 安裝套件的方法如下:

    a. 在 Visual Studio 2015 中,選擇 工具 > NuGet 套件管理員 > 套件管理器主控台

    b. 在 [套件管理器主控台] 中,輸入 Install-Package Newtonsoft.Json。

  2. 安裝套件之後,將 using Newtonsoft.Json; 加入 Program.cs。

  3. 在 Program.cs 中,加入下列程式碼以取得 資料集識別碼

  4. 執行主控台應用程式,然後登入您的 Power BI 帳戶。 您應該會看到 Dataset ID: 後面接著 [主控台視窗] 中的識別碼。

取得資料集的範例

將此程式碼加入 Program.cs 中。

  • 在 static void Main(string[] args) 中:
  static void Main(string[] args)
  {

    //Get an authentication access token
    token = GetToken();

    //Create a dataset in Power BI
    CreateDataset();

    //Get a dataset to add rows into a Power BI table
    string datasetId = GetDataset();
  }
  • 加入 GetDatset() 方法:
    #region Get a dataset to add rows into a Power BI table
    private static string GetDataset()
    {
        string powerBIDatasetsApiUrl = "https://api.powerbi.com/v1.0/myorg/datasets";
        //POST web request to create a dataset.
        //To create a Dataset in a group, use the Groups uri: https://api.PowerBI.com/v1.0/myorg/groups/{group_id}/datasets
        HttpWebRequest request = System.Net.WebRequest.Create(powerBIDatasetsApiUrl) as System.Net.HttpWebRequest;
        request.KeepAlive = true;
        request.Method = "GET";
        request.ContentLength = 0;
        request.ContentType = "application/json";

        //Add token to the request header
        request.Headers.Add("Authorization", String.Format("Bearer {0}", token));

        string datasetId = string.Empty;
        //Get HttpWebResponse from GET request
        using (HttpWebResponse httpResponse = request.GetResponse() as System.Net.HttpWebResponse)
        {
            //Get StreamReader that holds the response stream
            using (StreamReader reader = new System.IO.StreamReader(httpResponse.GetResponseStream()))
            {
                string responseContent = reader.ReadToEnd();

                //TODO: Install NuGet Newtonsoft.Json package: Install-Package Newtonsoft.Json
                //and add using Newtonsoft.Json
                var results = JsonConvert.DeserializeObject<dynamic>(responseContent);

                //Get the first id
                datasetId = results["value"][0]["id"];

                Console.WriteLine(String.Format("Dataset ID: {0}", datasetId));
                Console.ReadLine();

                return datasetId;
            }
        }
    }
    #endregion

下一個步驟將為您示範如何將資料列加入 Power BI 資料表

以下是完整程式碼清單

完整程式碼清單

using System;
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System.Net;
using System.IO;
using Newtonsoft.Json;

namespace walkthrough_push_data
{
    class Program
    {
        private static string token = string.Empty;

        static void Main(string[] args)
        {

            //Get an authentication access token
            token = GetToken();

            //Create a dataset in Power BI
            CreateDataset();

            //Get a dataset to add rows into a Power BI table
            string datasetId = GetDataset();

        }

        #region Get an authentication access token
        private static string GetToken()
        {
            // TODO: Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory -Version 2.21.301221612
            // and add using Microsoft.IdentityModel.Clients.ActiveDirectory

            //The client id that Azure AD created when you registered your client app.
            string clientID = "{Client_ID}";

            //RedirectUri you used when you register your app.
            //For a client app, a redirect uri gives Azure AD more details on the application that it will authenticate.
            // You can use this redirect uri for your client app
            string redirectUri = "https://login.live.com/oauth20_desktop.srf";

            //Resource Uri for Power BI API
            string resourceUri = "https://analysis.windows.net/powerbi/api";

            //OAuth2 authority Uri
            string authorityUri = "https://login.windows.net/common/oauth2/authorize";

            //Get access token:
            // To call a Power BI REST operation, create an instance of AuthenticationContext and call AcquireToken
            // AuthenticationContext is part of the Active Directory Authentication Library NuGet package
            // To install the Active Directory Authentication Library NuGet package in Visual Studio,
            //  run "Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory" from the nuget Package Manager Console.

            // AcquireToken will acquire an Azure access token
            // Call AcquireToken to get an Azure token from Azure Active Directory token issuance endpoint
            AuthenticationContext authContext = new AuthenticationContext(authorityUri);
            string token = authContext.AcquireToken(resourceUri, clientID, new Uri(redirectUri)).AccessToken;

            Console.WriteLine(token);
            Console.ReadLine();

            return token;
        }

        #endregion

        #region Create a dataset in Power BI
        private static void CreateDataset()
        {
            //TODO: Add using System.Net and using System.IO

            string powerBIDatasetsApiUrl = "https://api.powerbi.com/v1.0/myorg/datasets";
            //POST web request to create a dataset.
            //To create a Dataset in a group, use the Groups uri: https://api.PowerBI.com/v1.0/myorg/groups/{group_id}/datasets
            HttpWebRequest request = System.Net.WebRequest.Create(powerBIDatasetsApiUrl) as System.Net.HttpWebRequest;
            request.KeepAlive = true;
            request.Method = "POST";
            request.ContentLength = 0;
            request.ContentType = "application/json";

            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", token));

            //Create dataset JSON for POST request
            string datasetJson = "{\"name\": \"SalesMarketing\", \"tables\": " +
                "[{\"name\": \"Product\", \"columns\": " +
                "[{ \"name\": \"ProductID\", \"dataType\": \"Int64\"}, " +
                "{ \"name\": \"Name\", \"dataType\": \"string\"}, " +
                "{ \"name\": \"Category\", \"dataType\": \"string\"}," +
                "{ \"name\": \"IsCompete\", \"dataType\": \"bool\"}," +
                "{ \"name\": \"ManufacturedOn\", \"dataType\": \"DateTime\"}" +
                "]}]}";

            //POST web request
            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(datasetJson);
            request.ContentLength = byteArray.Length;

            //Write JSON byte[] into a Stream
            using (Stream writer = request.GetRequestStream())
            {
                writer.Write(byteArray, 0, byteArray.Length);

                var response = (HttpWebResponse)request.GetResponse();

                Console.WriteLine(string.Format("Dataset {0}", response.StatusCode.ToString()));

                Console.ReadLine();
            }
        }
        #endregion

        #region Get a dataset to add rows into a Power BI table
        private static string GetDataset()
        {
            string powerBIDatasetsApiUrl = "https://api.powerbi.com/v1.0/myorg/datasets";
            //POST web request to create a dataset.
            //To create a Dataset in a group, use the Groups uri: https://api.PowerBI.com/v1.0/myorg/groups/{group_id}/datasets
            HttpWebRequest request = System.Net.WebRequest.Create(powerBIDatasetsApiUrl) as System.Net.HttpWebRequest;
            request.KeepAlive = true;
            request.Method = "GET";
            request.ContentLength = 0;
            request.ContentType = "application/json";

            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", token));

            string datasetId = string.Empty;
            //Get HttpWebResponse from GET request
            using (HttpWebResponse httpResponse = request.GetResponse() as System.Net.HttpWebResponse)
            {
                //Get StreamReader that holds the response stream
                using (StreamReader reader = new System.IO.StreamReader(httpResponse.GetResponseStream()))
                {
                    string responseContent = reader.ReadToEnd();

                    //TODO: Install NuGet Newtonsoft.Json package: Install-Package Newtonsoft.Json
                    //and add using Newtonsoft.Json
                    var results = JsonConvert.DeserializeObject<dynamic>(responseContent);

                    //Get the first id
                    datasetId = results["value"][0]["id"];

                    Console.WriteLine(String.Format("Dataset ID: {0}", datasetId));
                    Console.ReadLine();

                    return datasetId;
                }
            }
        }
        #endregion
    }
}

下一步 >

另請參閱

將資料列新增至 Power BI 資料表
Newtonsoft.Json
取得資料集
將資料推送至 Power BI
Power BI REST API 概觀
Power BI REST API 參考
PIARY 上的 Power BI REST API

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