DocumentDB 创建集合
在本章中,我们将学习如何创建集合。它类似于创建数据库。您可以从门户网站或使用 .Net SDK 的代码创建集合。
步骤 1-转到 Azure 门户上的主仪表板。
步骤 2-从数据库列表中选择 myfirstdb。
第 3 步-单击"添加收藏"选项并指定收藏 ID。为不同的选项选择定价层。
步骤 4-让我们选择 S1 标准,然后单击选择 → 确定按钮。
如您所见,MyCollection 已添加到 myfirstdb。
您还可以使用 .Net SDK 从代码创建集合。让我们看看以下从代码中添加集合的步骤。
步骤 1-在 Visual Studio 中打开控制台应用程序。
第 2 步-要创建一个集合,首先在 CreateDocumentClient 任务中通过其 ID 检索 myfirstdb 数据库。
private static async Task CreateDocumentClient() {
// Create a new instance of the DocumentClient
using (var client = new DocumentClient(new Uri(EndpointUrl), AuthorizationKey)) {
database = client.CreateDatabaseQuery("SELECT * FROM c WHERE c.id =
'myfirstdb'").AsEnumerable().First();
await CreateCollection(client, "MyCollection1");
await CreateCollection(client, "MyCollection2", "S2");
}
}
以下是 CreateCollection 任务的实现。
private async static Task CreateCollection(DocumentClient client, string collectionId,
string offerType = "S1") {
Console.WriteLine();
Console.WriteLine("**** Create Collection {0} in {1} ****", collectionId, database.Id);
var collectionDefinition = new DocumentCollection { Id = collectionId };
var options = new RequestOptions { OfferType = offerType };
var result = await client.CreateDocumentCollectionAsync(database.SelfLink,
collectionDefinition, options);
var collection = result.Resource;
Console.WriteLine("Created new collection");
ViewCollection(collection);
}
我们创建一个新的 DocumentCollection 对象,该对象为 CreateDocumentCollectionAsync 方法定义了具有所需 Id 的新集合,该方法还接受我们在此处使用的选项参数来设置新集合的性能层,我们将其称为 offerType .
这默认为 S1,因为我们没有为 MyCollection1 传递 offerType,所以这将是一个 S1 集合,而对于 MyCollection2,我们已经传递了 S2,这使得这个集合成为 S2,如上所示。
以下是 ViewCollection 方法的实现。
private static void ViewCollection(DocumentCollection collection) {
Console.WriteLine("Collection ID: {0} ", collection.Id);
Console.WriteLine("Resource ID: {0} ", collection.ResourceId);
Console.WriteLine("Self Link: {0} ", collection.SelfLink);
Console.WriteLine("Documents Link: {0} ", collection.DocumentsLink);
Console.WriteLine("UDFs Link: {0} ", collection.UserDefinedFunctionsLink);
Console.WriteLine(" StoredProcs Link: {0} ", collection.StoredProceduresLink);
Console.WriteLine("Triggers Link: {0} ", collection.TriggersLink);
Console.WriteLine("Timestamp: {0} ", collection.Timestamp);
}
以下是集合的 program.cs 文件的完整实现。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Azure.Documents;
using Microsoft.Azure.Documents.Client;
using Microsoft.Azure.Documents.Linq;
using Newtonsoft.Json;
namespace DocumentDBDemo {
class Program {
private const string EndpointUrl = "https://azuredocdbdemo.documents.azure.com:443/";
private const string AuthorizationKey = "BBhjI0gxdVPdDbS4diTjdloJq7Fp4L5RO/
StTt6UtEufDM78qM2CtBZWbyVwFPSJIm8AcfDu2O+AfV T+TYUnBQ==";
private static Database database;
static void Main(string[] args) {
try {
CreateDocumentClient().Wait();
} catch (Exception e) {
Exception baseException = e.GetBaseException();
Console.WriteLine("Error: {0}, Message: {1}", e.Message, baseException.Message);
}
Console.ReadKey();
}
private static async Task CreateDocumentClient() {
// Create a new instance of the DocumentClient
using (var client = new DocumentClient(new Uri(EndpointUrl), AuthorizationKey)) {
database = client.CreateDatabaseQuery("SELECT * FROM c WHERE c.id =
'myfirstdb'").AsEnumerable().First();
await CreateCollection(client, "MyCollection1");
await CreateCollection(client, "MyCollection2", "S2");
//await CreateDatabase(client);
//GetDatabases(client);
//await DeleteDatabase(client);
//GetDatabases(client);
}
}
private async static Task CreateCollection(DocumentClient client,
string collectionId, string offerType = "S1") {
Console.WriteLine();
Console.WriteLine("**** Create Collection {0} in {1} ****", collectionId,
database.Id);
var collectionDefinition = new DocumentCollection { Id = collectionId };
var options = new RequestOptions { OfferType = offerType };
var result = await
client.CreateDocumentCollectionAsync(database.SelfLink,
collectionDefinition, options);
var collection = result.Resource;
Console.WriteLine("Created new collection");
ViewCollection(collection);
}
private static void ViewCollection(DocumentCollection collection) {
Console.WriteLine("Collection ID: {0} ", collection.Id);
Console.WriteLine("Resource ID: {0} ", collection.ResourceId);
Console.WriteLine("Self Link: {0} ", collection.SelfLink);
Console.WriteLine("Documents Link: {0} ", collection.DocumentsLink);
Console.WriteLine("UDFs Link: {0} ", collection.UserDefinedFunctionsLink);
Console.WriteLine("StoredProcs Link: {0} ", collection.StoredProceduresLink);
Console.WriteLine("Triggers Link: {0} ", collection.TriggersLink);
Console.WriteLine("Timestamp: {0} ", collection.Timestamp);
}
}
}
当上面的代码被编译和执行时,您将收到以下输出,其中包含与集合相关的所有信息。
**** Create Collection MyCollection1 in myfirstdb ****
Created new collection
Collection ID: MyCollection1
Resource ID: Ic8LAPPvnAA=
Self Link: dbs/Ic8LAA==/colls/Ic8LAPPvnAA=/
Documents Link: dbs/Ic8LAA==/colls/Ic8LAPPvnAA=/docs/
UDFs Link: dbs/Ic8LAA==/colls/Ic8LAPPvnAA=/udfs/
StoredProcs Link: dbs/Ic8LAA==/colls/Ic8LAPPvnAA=/sprocs/
Triggers Link: dbs/Ic8LAA==/colls/Ic8LAPPvnAA=/triggers/
Timestamp: 12/10/2015 4:55:36 PM
**** Create Collection MyCollection2 in myfirstdb ****
Created new collection
Collection ID: MyCollection2
Resource ID: Ic8LAKGHDwE=
Self Link: dbs/Ic8LAA==/colls/Ic8LAKGHDwE=/
Documents Link: dbs/Ic8LAA==/colls/Ic8LAKGHDwE=/docs/
UDFs Link: dbs/Ic8LAA==/colls/Ic8LAKGHDwE=/udfs/
StoredProcs Link: dbs/Ic8LAA==/colls/Ic8LAKGHDwE=/sprocs/
Triggers Link: dbs/Ic8LAA==/colls/Ic8LAKGHDwE=/triggers/
Timestamp: 12/10/2015 4:55:38 PM