谷歌的BigQuery與.NET文檔/樣品

Question

我需要使用Google BigQuery API查詢數據。但我很努力地找到.NET示例，並且二進制文件（Google.Apis.Bigquery.dll）沒有包含任何文檔。任何人都可以爲我提供.NET的示例用法嗎？

Answer 1

我們還沒有任何的BigQuery C＃的樣品，但谷歌.NET庫提供各種樣品爲其他谷歌API和代碼是相似的。 See this page for an example。代碼如下所示（注：我還沒有機會實際測試這個，所以編輯歡迎...）。順便說一下，我們正在爲BigQuery進行大量文檔更新，我們希望儘快發佈一些C＃示例（但最有可能的是下個月）。

using DotNetOpenAuth.OAuth2; 
using Google.Apis.Authentication.OAuth2; 
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth; 

using Google.Apis.Bigquery.v2; 
using Google.Apis.Util; 

{ 
    public class Program 
    { 
     public static void Main(string[] args) 
     { 
      // Register an authenticator. 
      var provider = new NativeApplicationClient(GoogleAuthenticationServer.Description); 

      // Put your client id and secret here (from https://developers.google.com/console) 
      // Use the installed app flow here. 
      provider.ClientIdentifier = "<client id>"; 
      provider.ClientSecret = "<client secret>"; 

      // Initiate an OAuth 2.0 flow to get an access token 
      var auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization); 

      // Create the service. 
      var service = new BigqueryService(auth); 

      // Do something with the BigQuery service here 
      // Such as... service.[some BigQuery method].Fetch(); 
     } 

     private static IAuthorizationState GetAuthorization(NativeApplicationClient arg) 
     { 
      // Get the auth URL: 
      IAuthorizationState state = new AuthorizationState(new[] { BigqueryService.Scopes.Bigquery.GetStringValue() }); 
      state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl); 
      Uri authUri = arg.RequestUserAuthorization(state); 

      // Request authorization from the user (by opening a browser window): 
      Process.Start(authUri.ToString()); 
      Console.Write(" Authorization Code: "); 
      string authCode = Console.ReadLine(); 
      Console.WriteLine(); 

      // Retrieve the access token by using the authorization code: 
      return arg.ProcessUserAuthorization(authCode, state); 
     } 
    } 
} 

Answer 2

這裏的工作示例，基於部分關閉邁克爾的迴應：

using DotNetOpenAuth.OAuth2; 
using Google.Apis.Authentication.OAuth2; 
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth; 

using Google.Apis.Bigquery.v2; 
using Google.Apis.Bigquery.v2.Data; 

using Google.Apis.Util; 
using System; 
using System.Diagnostics; 
using System.Collections.Generic; 

namespace BigQueryConsole 
{ 
    public class BigQueryConsole 
    { 
     // Put your client ID and secret here (from https://developers.google.com/console) 
     // Use the installed app flow here. 
     // Client ID looks like "9999999.apps.googleusercontent.com" 
     static string clientId = "YOURCLIENTID"; 
     static string clientSecret = "YOURSECRET"; 

     // Project ID is in the URL of your project on the APIs Console 
     // Project ID looks like "999999"; 
     static string projectId = "YOURPROJECTID"; 

     // Query in SQL-like form 
     static string query = "SELECT state, count(*) from [publicdata:samples.natality] GROUP BY state ORDER BY state ASC"; 

     public static void Main(string[] args) 
     { 
      // Register an authenticator. 
      var provider = new NativeApplicationClient(GoogleAuthenticationServer.Description); 

      provider.ClientIdentifier = clientId; 
      provider.ClientSecret = clientSecret; 

      // Initiate an OAuth 2.0 flow to get an access token 

      var auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization); 

      // Create the service. 
      var service = new BigqueryService(auth); 
      JobsResource j = service.Jobs; 
      QueryRequest qr = new QueryRequest(); 
      qr.Query = query; 

      QueryResponse response = j.Query(qr, projectId).Fetch(); 
      foreach (TableRow row in response.Rows) 
      { 
       List<string> list = new List<string>(); 
       foreach (TableRow.FData field in row.F) 
       { 
        list.Add(field.V); 
       } 
       Console.WriteLine(String.Join("\t", list)); 
      } 
      Console.WriteLine("\nPress enter to exit"); 
      Console.ReadLine(); 
     } 

     private static IAuthorizationState GetAuthorization(NativeApplicationClient arg) 
     { 
      // Get the auth URL: 
      IAuthorizationState state = new AuthorizationState(new[] { BigqueryService.Scopes.Bigquery.GetStringValue() }); 
      state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl); 
      Uri authUri = arg.RequestUserAuthorization(state); 

      // Request authorization from the user (by opening a browser window): 
      Process.Start(authUri.ToString()); 
      Console.Write(" Authorization Code: "); 
      string authCode = Console.ReadLine(); 
      Console.WriteLine(); 

      // Retrieve the access token by using the authorization code: 
      return arg.ProcessUserAuthorization(authCode, state); 
     } 
    } 
} 

它使用同步查詢。對於異步查詢，代碼會稍有不同。

你需要（在二進制下載「服務」目錄下），同時引用BigQuery服務的DLL，加上在「庫」目錄中的其他DLL。二進制版本是在這裏：http://code.google.com/p/google-api-dotnet-client/wiki/Downloads#Latest_Stable_Release

的.NET代碼將是非常相似的Java庫代碼（他們從同一個API描述的生成）： https://developers.google.com/bigquery/docs/developers_guide#batchqueries

，我們會得到更多的樣本在那裏很快，但希望這有助於在此期間。