前面我們已經準備成功開啟Redis服務,其埠號為6379,接下來我們就看看如何使用C#語言來操作Redis。就如MongoDB一樣,要操作Redis服務,自然就需要下載C#的用戶端,這裡通過Nuget下載了「ServiceStack.Redis」用戶端,引入成功之後,就可以使用C#來對Redis服務進行操作了。
由於Redis一般是用來作為快取的,也就是一般我們把一些不經常改變的資料通過Redis快取起來,之後使用者的請求就不需要再存取資料庫,而可以直接從Redis快取中直接獲取,這樣就可以減輕資料庫伺服器的壓力以及加快響應速度。既然是用來做快取的,也就是通過指定key值來把對應Value儲存起來,之後再根據key值來獲得之前快取的值。具體的操作程式碼如下所示,這裡就不過多介紹了。
請參考以下程式碼 -
class Program
{
static void Main(string[] args)
{
//在Redis中儲存常用的5種資料型別:String,Hash,List,SetSorted set
var client = new RedisClient("127.0.0.1", 6379);
//AddString(client);
//AddHash(client);
//AddList(client);
//AddSet(client);
AddSetSorted(client);
Console.ReadLine();
}
private static void AddString(RedisClient client)
{
var timeOut = new TimeSpan(0,0,0,30);
client.Add("Test", "Learninghard", timeOut);
while (true)
{
if (client.ContainsKey("Test"))
{
Console.WriteLine("String Key: Test -Value: {0}, 當前時間: {1}", client.Get<string>("Test"), DateTime.Now);
Thread.Sleep(10000);
}
else
{
Console.WriteLine("Value 已經過期了,當前時間:{0}", DateTime.Now);
break;
}
}
var person = new Person() {Name = "Learninghard", Age = 26};
client.Add("lh", person);
var cachePerson = client.Get<Person>("lh");
Console.WriteLine("Person's Name is : {0}, Age: {1}", cachePerson.Name, cachePerson.Age);
}
private static void AddHash(RedisClient client)
{
if (client == null) throw new ArgumentNullException("client");
client.SetEntryInHash("HashId", "Name", "Learninghard");
client.SetEntryInHash("HashId", "Age", "26");
client.SetEntryInHash("HashId", "Sex", "男");
var hashKeys = client.GetHashKeys("HashId");
foreach (var key in hashKeys)
{
Console.WriteLine("HashId--Key:{0}", key);
}
var haskValues = client.GetHashValues("HashId");
foreach (var value in haskValues)
{
Console.WriteLine("HashId--Value:{0}", value);
}
var allKeys = client.GetAllKeys(); //獲取所有的key。
foreach (var key in allKeys)
{
Console.WriteLine("AllKey--Key:{0}", key);
}
}
private static void AddList(RedisClient client)
{
if (client == null) throw new ArgumentNullException("client");
client.EnqueueItemOnList("QueueListId", "1.Learnghard"); //入隊
client.EnqueueItemOnList("QueueListId", "2.張三");
client.EnqueueItemOnList("QueueListId", "3.李四");
client.EnqueueItemOnList("QueueListId", "4.王五");
var queueCount = client.GetListCount("QueueListId");
for (var i = 0; i < queueCount; i++)
{
Console.WriteLine("QueueListId出隊值:{0}", client.DequeueItemFromList("QueueListId")); //出隊(佇列先進先出)
}
client.PushItemToList("StackListId", "1.Learninghard"); //入棧
client.PushItemToList("StackListId", "2.張三");
client.PushItemToList("StackListId", "3.李四");
client.PushItemToList("StackListId", "4.王五");
var stackCount = client.GetListCount("StackListId");
for (var i = 0; i < stackCount; i++)
{
Console.WriteLine("StackListId出棧值:{0}", client.PopItemFromList("StackListId")); //出棧(棧先進後出)
}
}
//它是string型別的無序集合。set是通過hash table實現的,新增,刪除和查詢,對集合我們可以取並集,交集,差集
private static void AddSet(RedisClient client)
{
if (client == null) throw new ArgumentNullException("client");
client.AddItemToSet("Set1001", "A");
client.AddItemToSet("Set1001", "B");
client.AddItemToSet("Set1001", "C");
client.AddItemToSet("Set1001", "D");
var hastset1 = client.GetAllItemsFromSet("Set1001");
foreach (var item in hastset1)
{
Console.WriteLine("Set無序集合Value:{0}", item); //出來的結果是無須的
}
client.AddItemToSet("Set1002", "K");
client.AddItemToSet("Set1002", "C");
client.AddItemToSet("Set1002", "A");
client.AddItemToSet("Set1002", "J");
var hastset2 = client.GetAllItemsFromSet("Set1002");
foreach (var item in hastset2)
{
Console.WriteLine("Set無序集合ValueB:{0}", item); //出來的結果是無須的
}
var hashUnion = client.GetUnionFromSets(new string[] { "Set1001", "Set1002" });
foreach (var item in hashUnion)
{
Console.WriteLine("求Set1001和Set1002的並集:{0}", item); //並集
}
var hashG = client.GetIntersectFromSets(new string[] { "Set1001", "Set1002" });
foreach (var item in hashG)
{
Console.WriteLine("求Set1001和Set1002的交集:{0}", item); //交集
}
var hashD = client.GetDifferencesFromSet("Set1001", new string[] { "Set1002" }); //[返回存在於第一個集合,但是不存在於其他集合的資料。差集]
foreach (var item in hashD)
{
Console.WriteLine("求Set1001和Set1002的差集:{0}", item); //差集
}
}
/*
sorted set 是set的一個升級版本,它在set的基礎上增加了一個順序的屬性,這一屬性在新增修改.元素的時候可以指定,
* 每次指定後,zset(表示有序集合)會自動重新按新的值調整順序。可以理解為有列的表,一列存 value,一列存順序。操作中key理解為zset的名字.
*/
private static void AddSetSorted(RedisClient client)
{
if (client == null) throw new ArgumentNullException("client");
client.AddItemToSortedSet("SetSorted1001", "A");
client.AddItemToSortedSet("SetSorted1001", "B");
client.AddItemToSortedSet("SetSorted1001", "C");
var listSetSorted = client.GetAllItemsFromSortedSet("SetSorted1001");
foreach (var item in listSetSorted)
{
Console.WriteLine("SetSorted有序集合{0}", item);
}
client.AddItemToSortedSet("SetSorted1002", "A", 400);
client.AddItemToSortedSet("SetSorted1002", "D", 200);
client.AddItemToSortedSet("SetSorted1002", "B", 300);
// 升序獲取第一個值:"D"
var list = client.GetRangeFromSortedSet("SetSorted1002", 0, 0);
foreach (var item in list)
{
Console.WriteLine(item);
}
//降序獲取第一個值:"A"
list = client.GetRangeFromSortedSetDesc("SetSorted1002", 0, 0);
foreach (var item in list)
{
Console.WriteLine(item);
}
}
}
class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
如何要想檢視自己操作是否成功,也可以像MongoDB那樣下載一個用戶端工具,這裡推薦一款Redis Desktop Manager。這個工具就相當於SQL Server的用戶端工具一樣。通過這款工具可以檢視Redis伺服器中儲存的資料和對應格式。其使用也非常簡單,只需要新增一個Redis服務連線即可。該工具的下載地址為:http://pan.baidu.com/s/1sjp55Ul