Redis筆記-EVAL 使用if判斷對應欄位值範例

語言: c#
使用函式庫: StackExchange.Redis

//設定連線字串
using ( ConnectionMultiplexer conn = ConnectionMultiplexer.Connect("127.0.0.1:10001"))
{
 // 取得操作介面
 IDatabase cache = conn.GetDatabase();

 RedisKey custKey1 = "Key1";
 RedisValue newTest1 = "first";

 // 設定Script 字串
 string tEval = @"local res = redis.call('get', KEYS[1]) 
    if res  == ""value1"" then 
     return ARGV[1] 
    else
     return res
    end";

 // 設定 custKey1 的值為 "value1"
 cache.StringSet(custKey1, "value1");

 // 呼叫執行Script (Eval)
 RedisResult tResult = cache.ScriptEvaluate(tEval
  , new RedisKey[] { custKey1 }, new RedisValue[] { newTest1 });

 if (tResult.IsNull == false)
 {
  Console.WriteLine(tResult.ToString());
 }
}