3

我正在研究一个 MUD，目前命令处理程序是一个元组，它接受一个字符串 readString 和带有 switch 语句的 Player PlayerObj 来确定返回元组

public Tuple<string, Player> handleCMD(string readString, Player PlayerObj)
{
    Tuple<string, Player> returnTuple = new Tuple<string, Player>(readString, PlayerObj);
    string[] arguments = readString.Split(' ');

    switch (arguments[0].ToLower())
    {
        case "addchange":
            returnTuple = doAddChange(readString, PlayerObj);
            break;
        case "changes":
            returnTuple = doChanges(readString, PlayerObj);
            break;
        case "score":
            returnTuple = doScore(readString, PlayerObj);
            break;
        case "look":
            returnTuple = doLook(readString, PlayerObj);
            break;
        case "north":
            returnTuple = doWalk(arguments[0], PlayerObj);
            break;
        case "east":
            returnTuple = doWalk(arguments[0], PlayerObj);
            break;
        case "south":
            returnTuple = doWalk(arguments[0], PlayerObj);
            break;
        case "west":
            returnTuple = doWalk(arguments[0], PlayerObj);
            break;
        case "quit":
            returnTuple = doQuit(readString, PlayerObj);
            break;
        case "chat":
            returnTuple = doChat(readString, PlayerObj);
            break;
        case "say":
            returnTuple = doSay(readString, PlayerObj);
            break;
        case "who":
            returnTuple = doWho(readString, PlayerObj);
            break;
        case "tell":
            returnTuple = doTell(readString, PlayerObj);
            break;
        default:
            returnTuple = doHuh(readString, PlayerObj);
            break;
    }
    return returnTuple;
}

public Tuple<string, Player> doSay(string readString, Player PlayerObj)
{
    DBHandler dbHandler = new DBHandler();
    PlayerObj = dbHandler.GetPlayer(PlayerObj.PlayerName);
    string returnString;
    string[] arguments = readString.Split(' ');
    if (arguments.Count() > 1 && arguments[1] != string.Empty && arguments[1] != null && arguments[1] != "" && arguments[1] != " ")
    {
        readString = readString.Trim().Replace("say ", "");
        Message message = new Message(0, readString, PlayerObj.PlayerID, 0, 1, 1);
        returnString = string.Format("You say \"{0}\"", readString);
        foreach (int i in dbHandler.GetPlayersInRoom(PlayerObj.RoomID, PlayerObj.PlayerName))
            dbHandler.AddMessage(new Message(0, message.MessageText, message.SenderPlayerID, i, message.MessageType, message.Ticked));
    }
    else
        returnString = "[Syntax] : Say <Message>";
    return new Tuple<string, Player>(returnString, PlayerObj);
}

我想用数据库中的表填充的字典替换 switch 语句，这样我就可以在数据库表中添加和禁用命令/别名，而无需编辑代码

我试过这样做：

public Tuple<string, Player> handleCMD(string readString, Player PlayerObj)
{
    Tuple<string, Player> returnTuple = new Tuple<string, Player>(readString, PlayerObj);
    string[] arguments = readString.Split(' ');
    DBHandler dbHandler = new DBHandler();

    Dictionary<string, Delegate> cmdDictionary = new Dictionary<string, Delegate>();

    foreach (Command playerCommand in dbHandler.GetCommands())
        cmdDictionary.Add(playerCommand.CommandName, new Func<string, Player, Tuple<string, Player>>(playerCommand.CommandTuple));
    if (cmdDictionary[arguments[0]] != null)
        returnTuple = (Tuple<string, Player>)cmdDictionary[arguments[0]].DynamicInvoke(readString, PlayerObj);
    else
        returnTuple = doHuh(readString, PlayerObj);
    return returnTuple;
}

问题是我收到错误消息：

cmdDictionary.Add(playerCommand.CommandName, new Func<string, Player, Tuple<string, Player>>(playerCommand.CommandTuple));
'GWOService.Command.CommandTuple' is a 'property' but is used like a 'method'

playerCommand.CommandName 是一个字符串，它 = "doSay" 或 "doHuh" 或任何元组的名称，但以下工作：

cmdDictionary.Add(playerCommand.CommandName, new Func<string, Player, Tuple<string, Player>>(doSay/*playerCommand.CommandTuple*/));

更新

所以我再次尝试了以下内容：

public Tuple<string, Player> handleCMD(string readString, Player PlayerObj)
{
    Tuple<string, Player> returnTuple = new Tuple<string, Player>(readString, PlayerObj);
    string[] arguments = readString.Split(' ');
    DBHandler dbHandler = new DBHandler();
    Dictionary<string, Delegate> cmdDictionary = new Dictionary<string, Delegate>();
    foreach (Command playerCommand in dbHandler.GetCommands())
    {
        try
        {
            MethodInfo method = GetType().GetMethod(playerCommand.CommandTuple);
            //Func<string, Player, Tuple<string, Player>> func = ( ) => { return (Tuple<string, Player>)(this.GetType().GetMethod(playerCommand.CommandTuple).Invoke(this, new object[0])); }
            Func<string, Player, Tuple<string, Player>> func = (Func<string, Player, Tuple<string, Player>>)Delegate.CreateDelegate(typeof(Func<string, Player, Tuple<string, Player>>), method);
            cmdDictionary.Add(playerCommand.CommandName, new Func<string, Player, Tuple<string, Player>>(func));
        }
        catch (Exception e)
        {
            dbHandler.LogEntry(PlayerObj, e.ToString());
        }
    }
    if (cmdDictionary[arguments[0]] != null)
        returnTuple = (Tuple<string, Player>)cmdDictionary[arguments[0]].DynamicInvoke(readString, PlayerObj);
    else
        returnTuple = doHuh(readString, PlayerObj);

    //switch (arguments[0].ToLower())
    //{
    //    case "addchange":
    //        returnTuple = doAddChange(readString, PlayerObj);
    //        break;
    //    case "changes":
    //        returnTuple = doChanges(readString, PlayerObj);
    //        break;
    //    case "score":
    //        returnTuple = doScore(readString, PlayerObj);
    //        break;
    //    case "look":
    //        returnTuple = doLook(readString, PlayerObj);
    //        break;
    //    case "north":
    //        returnTuple = doWalk(arguments[0], PlayerObj);
    //        break;
    //    case "east":
    //        returnTuple = doWalk(arguments[0], PlayerObj);
    //        break;
    //    case "south":
    //        returnTuple = doWalk(arguments[0], PlayerObj);
    //        break;
    //    case "west":
    //        returnTuple = doWalk(arguments[0], PlayerObj);
    //        break;
    //    case "quit":
    //        returnTuple = doQuit(readString, PlayerObj);
    //        break;
    //    case "chat":
    //        returnTuple = doChat(readString, PlayerObj);
    //        break;
    //    case "say":
    //        returnTuple = doSay(readString, PlayerObj);
    //        break;
    //    case "who":
    //        returnTuple = doWho(readString, PlayerObj);
    //        break;
    //    case "tell":
    //        returnTuple = doTell(readString, PlayerObj);
    //        break;
    //    default:
    //        returnTuple = doHuh(readString, PlayerObj);
    //        break;
    //}
    return returnTuple;
}

但我得到了错误：

25号线

Func<string, Player, Tuple<string, Player>> func = (Func<string, Player, Tuple<string, Player>>)Delegate.CreateDelegate(typeof(Func<string, Player, Tuple<string, Player>>), method);

System.ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.
at System.Delegate.CreateDelegate(Type type, MethodInfo method, Boolean throwOnBindFailure)
at System.Delegate.CreateDelegate(Type type, MethodInfo method)
at GWOService.CmdHandler.handleCMD(String readString, Player PlayerObj) in \Projects\GodWarsOxide\GWOService\CmdHandler.cs:line 25
4

2 回答 2

2

对于第一个错误尝试：

cmdDictionary.Add(playerCommand.CommandName, new Func<string, Player, Tuple<string, Player>>(playerCommand.CommandTuple));

对于第二个错误尝试：

returnTuple = (System.Tuple<string,GWOService.Player>)cmdDictionary[arguments[0]].DynamicInvoke(readString, PlayerObj);

我认为这会起作用，虽然还没有测试过

于 2013-09-15T02:39:39.633 回答
2

你可以用GetMethod它的名字来获取你需要调用的方法

this.GetType().GetMethod("doSay")

然后您可以使用所需的参数和返回类型在命令上创建一个Func或DelegateInvokeMethodInfo

var function = new Func<string, Player, Tuple<string, Player>>((arg1, arg2) => (Tuple<string, Player>)this.GetType().GetMethod("doSay").Invoke(this, new object[] { arg1, arg2 })));

将其包裹起来以使其可重复使用

public Func<string, Player, Tuple<string, Player>> CreateFunction(string methodName)
{
    if (this.GetType().GetMethods().Any(x => x.Name == methodName))
    {
        return new Func<string, Player, Tuple<string, Player>>((arg1, arg2) => (Tuple<string, Player>)this.GetType().GetMethod(methodName).Invoke(this, new object[] { arg1, arg2 }));
    }
    return null;
}

然后你可以将这些添加到你的Dictionary

  var functions = new Dictionary<string, Func<string, Player, Tuple<string, Player>>>();
  functions.Add("Say",CreateFunction("doSay"));

或来自你Database

foreach (Command playerCommand in dbHandler.GetCommands())
{
    if (!functions.ContainsKey(playerCommand.CommandName))
    {
        functions.Add(playerCommand.CommandName, CreateFunction(playerCommand.CommandTuple));
    }
}

然后你可以随时打电话给他们

 var result = functions["Say"]("Hello", new Player());

笔记：

我建议用Tuple<sting, Player>一个不错的类代替，如下所示，因为在整个应用程序中处理它会不那么痛苦

public void Test()
{
    Dictionary<string, Func<string, Player, MyResult>> functions = new Dictionary<string, Func<string, Player, MyResult>>();
    functions.Add("Say",CreateFunction("doSay"));
    var result = functions["Say"]("Hello", new Player());
}

public Func<string, Player, MyResult> CreateFunction(string methodName)
{
    if (this.GetType().GetMethods().Any(x => x.Name == methodName))
    {
        return new Func<string, Player, MyResult>((arg1, arg2) => (MyResult)this.GetType().GetMethod(methodName).Invoke(this, new object[] { arg1, arg2 }));
    }
    return null;
}

public MyResult doSay(string value1, Player value2)
{
    return new MyResult(value1, value2);
}

public class MyResult
{
    public MyResult(string value1, Player value2)
    {
        Value1 = value1;
        Value2 = value2;
    }
    public string Value1 { get; set; }
    public Player Value2 { get; set; }
}
于 2013-09-16T22:31:06.377 回答