Azure Easy Tables - Load only one column - azure

Question

Is there some way to get only one data column for one row from Azure Easy Tables?
For example Xamarin.Forms app will send name of item to Azure and get the item creation DateTime only.

Answer 1

Here's an example where we want to select just the Name Column from our Dog Table.
This sample uses the Azure Mobile Client and the Azure Mobile Client SQL NuGet Packages.
Model
using Microsoft.WindowsAzure.MobileServices;
using Newtonsoft.Json;
namespace SampleApp
{
public class Dog
{
public string Name { get; set; }
public string Breed { get; set; }
public int Age { get; set; }
[JsonProperty(PropertyName = "id")]
public string Id { get; set; }
[CreatedAt]
public DateTimeOffset CreatedAt { get; set; }
[UpdatedAt]
public DateTimeOffset UpdatedAt { get; set; }
[Version]
public string AzureVersion { get; set; }
[Deleted]
public bool IsDeleted { get; set; }
}
}
Logic
using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Collections.Generic;
using Microsoft.WindowsAzure.MobileServices;
using Microsoft.WindowsAzure.MobileServices.Sync;
using Microsoft.WindowsAzure.MobileServices.SQLiteStore;
namespace SampleApp
{
public class MobileClientService
{
bool isMobileClientInitialized;
MobileServiceClient mobileClient;
public async Task<string> GetDogName(string id)
{
await InitializeMobileClient();
var dog = await mobileClient.GetSyncTable<Dog>().LookupAsync(id);
var dogName = dog.Name;
return dogName;
}
public async Task<IEnumerable<string>> GetDogNames()
{
await InitializeMobileClient();
var dogNameList = await mobileClient.GetSyncTable<Dog>().Select(x => x.Name).ToEnumerableAsync();
return dogNameList;
}
async Task InitializeMobileClient()
{
if(isMobileClientInitialized)
return;
mobileClient = new MobileServiceClient("Your Azure Mobile Client Url");
var path = Path.Combine(MobileServiceClient.DefaultDatabasePath, "app.db");
var store = new MobileServiceSQLiteStore(path);
store.DefineTable<Dog>();
//ToDo Define all remaining tables
await MobileServiceClient.SyncContext.InitializeAsync(store, new MobileServiceSyncHandler());
}
}
}