Azure表：在不创建特定类或不了解整个架构的情况下进行获取

Question

I have a table "constants" with a specific shema like :
PartitionKey, RowKey, Timestamp, ARG1, ARG2, ARG3

for example these entities:
production, 0, 01/01/2012, L, 5, 7
production, 1, 01/01/2012, F, 7, 7

Can I fetch an entity without create a class ?
Something as:

var query = MagicFunctionWichGiveAEntity("production", "0"); //0 is the RowKey  
var result = query.ValueOf("ARG1") // result = L  

I found this post but it look like complicated.

Answer 1

The only way to do this is with the ReadingEntity event (as described in the post you reference). If you want to see a fully working implementation I suggest you take a look at the Storage Services Smart Client located here: http://archive.msdn.microsoft.com/appfabriccat/Release/ProjectReleases.aspx?ReleaseId=5474

You'll need to look at the files:

• Client\\Helpers\\CloudStorageHelper.cs
• Client\\Helpers\\ConversionHelper.cs
• Client\\Helpers\\CustomEntity.cs

An alternative solution would be to interact directly with the REST API where you can get an entity in XML format: http://msdn.microsoft.com/en-us/library/windowsazure/dd179421

Answer 2

I have written an client that supports dynamic (unspecified) columns by using a dictionary to hold the name/value pairs. It also supports many other features like arrays, enumerations and data larger than 64K.

It is available free for personal use. You can get it at http://www.lucifure.com or via NuGet.com.