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The Table service, a whole different entity
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The Azure Storage Explorer showing the newly created Products table
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In this section, we ll look at how to create a table in two ways: using Azure Storage Explorer and using code.
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CREATING A TABLE USING THE AZURE STORAGE EXPLORER
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Once you have downloaded and fired up Azure Storage Explorer, it will automatically connect you to your development storage account as long as your local development storage service is running. To create a new table in your storage account, all you need to is select Table > New Table and enter the name of your table (Products, in this case). Figure 11.5 shows the newly created Products table in Azure Storage Explorer. Although using a tool such as Azure Storage Explorer is probably the easiest method of creating a new table, you may wish to do this manually in C#.
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CREATING A TABLE IN CODE
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In this example, you ll manually create a console application that will create a new table in the storage account when it s run. Although we ll have you use a console application in this example, you could easily use a web application, Windows Forms application, or Windows Presentation Foundation application. The deployment application doesn t need to be a cloud application (web or worker role); it can be a standard application that you run locally. To create the application, perform the following steps:
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Create a console application targeting .NET 3.5. Add a reference to System.Data.Services. Add a reference to System.Data.Services.Client.
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Developing with the Table service
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4 5 6
Add a reference to Microsoft.WindowsAzure.StorageClient. Add an app.config or web.config entry with your storage account credentials. Add the following code to create the table:
CloudStorageAccount.SetConfigurationSettingPublisher((configName, configSetter) => { configSetter(RoleEnvironment.GetConfigurationSettingValue(configName)); }); var storageAccount = CloudStorageAccount.FromConfigurationSetting("DataConnectionString"); CloudTableClient tableClient = storageAccount.CreateCloudTableClient(); tableClient.CreateTableIfNotExist("Products");
The code added in step 6 retrieves storage account information from the app.config and then calls the CreateTableIfNotExist method from the CloudTableClient object, passing in the name of the table to create (Products).
Deploying to live
The code used to create a new table will work not only on your development storage account, but will also work against the live system. All you need to do to make this code work against the live system is to change the DataConnectionString configuration setting to your live account.
Now that you know how to create a table both in the live system and in development storage, it s worth taking a quick peek at how this is implemented in the development storage backing store. Figure 11.6 shows how tables are represented in the development storage SQL Server database. As you can see in figure 11.6, the SQL Server database that stores the entities is pretty flexible. The TableContainer table keeps a list of all the tables stored in the development storage account. Because you can create tables dynamically, any new table created will contain a new entry in this table. Each row in the TableRow table in figure 11.6 stores a serialized version of the entity. As you can see from this table definition, the only fixed data that s stored in this table is AccountName, TableName, PartitionKey, RowKey, and TimeStamp. All other properties are stored in the Data column. As you can see, the actual development storage schema relates to the logical representation that you saw in table 11.4. Now that you ve seen how tables are represented in development storage, let s look at how you can start working with your entities.
The Table service, a whole different entity
How tables are represented in the development storage SQL Server database
11.6 Doing CRUDy stuff with the Table service
In this section, you ll build a new product-management web page to manage the Hawaiian shirt product list stored in the Table service. Through this web page, you ll be able to create, read, update, and delete (also known as CRUD) data in the table. Figure 11.7 shows what the web page will look like.
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