我制作了一个可以保存日志的简单程序。
我有两个问题，如果有人想帮助我，我真的很感激。
1.如何删除我在交换机的案例4中第123行写的程序中的日志？我试过logs.Clear（）;和Array.Clear（text，0，text.Length）;没有任何成功。
我已对代码进行了评论，因此希望它具有可读性。
public class loggProgram
{
public void Loggbok()
{
bool isRunning = true;
//All the essential code for the List and the Array that the user can save logs into
string[] text = new string[2];
text[0] = "title";
text[1] = "post";
List<string> logs = new List<string>();
//A Dictionary for the search option 3 in the switch menu
Dictionary<string, string> searchWord = new Dictionary<string, string>();
//While loop with all the user interaction
while (isRunning)
{
//The menu that the user can type 1-5 in order to make a option
Console.WriteLine("\n\tWelcome to the logbook.\n\tPlease type a number between 1-5.\n");
Console.WriteLine("\t[1]Create a log to the logbook");
Console.WriteLine("\t[2]Display all the current logs saved");
Console.WriteLine("\t[3]Search the logbook ");
Console.WriteLine("\t[4]Erase all logs ");
Console.WriteLine("\t[5]Quit ");
Console.Write("\tChoose a number: ");
//Take userinput & convert into a number with TryParse
string MenuOption = Console.ReadLine();
int userNumber;
if (int.TryParse(MenuOption, out userNumber))
{
Console.WriteLine("\tLoading program... Done!");
}
//Take userNumber and let number 1-5 start the switch
switch (userNumber)
{
case 1:
{ // Save a new log
Console.Clear();
//Let the user type a titel to the log
Console.Write("Titel: ");
text[0] = Console.ReadLine();
//Let the user type a message and then save it to searchWord
Console.Write("Message: ");
text[1] = Console.ReadLine();
Console.Clear();
searchWord[text[0]] = text[1];
break;
}
case 2:
{
//Show all the saved logs with a foreach loop
Console.Clear();
Console.WriteLine("This is currently saved in the logbook:\n ");
foreach (KeyValuePair<string, string> e in searchWord)
{
Console.WriteLine("Titel: " + e.Key + "\nText: " + e.Value);
}
Console.Write("\nPress any key to get back to the main meny.\n");
Console.ReadKey();
Console.Clear();
break;
}
case 3:
{
//Search for matching titel with a Dictionary and present a result if a match is found
Console.Clear();
Console.WriteLine("Search titel:");
string wordSearch = Console.ReadLine();
//foreach loop that search in the dictionary
foreach (KeyValuePair<string, string> word in searchWord)
{
if (word.Key == wordSearch)
{
Console.Clear();
Console.Write("Your search yeiled a result!\nThe match is:\n" + "Titel " + word.Key + "\nText " + word.Value);
Console.Write("\n\nPress any key to get back to the main meny.\n");
}
/*
I want to let the user know if nothing was found with a WriteLine output.
Right now it always prints out even when the user input is a correct titel,
it happens when more then 1 logs is saved so i need to change this
so it only prints out when a stirng input is not saved in the list.*/
else if (word.Key != wordSearch)
{
Console.WriteLine("Your search yeiled no results!");
}
}
Console.ReadLine();
Console.Clear();
break;
}
case 4:
{
//Reset all logs (it does not work so i need help with this one)
Console.Clear();
logs.Clear();
Array.Clear(text, 0, text.Length);
Console.WriteLine("Erasing all logs... Done.");
Console.Write("\n\nPress any key to get back to the main meny.\n");
Console.ReadLine();
Console.Clear();
break;
}
case 5:
{
//Closing the app
Console.Clear();
Console.WriteLine("Thanks for using the app, goodbye! ");
isRunning = false;
Console.ReadLine();
break;
}
default:
{
// Tell the user to type 1 - 5
Console.Clear();
Console.WriteLine("Something went wrong. Choose a number between 1-5.");
Console.ReadLine();
Console.Clear();
break;
}
}
}
}
/*
Main method
This Run Class creates a new instance so that the loggProgram is being called upon.
Then it starts the program in a new instance.
*/
class Run
{
static void Main(string[] args)
{
new loggProgram().Loggbok();
}
}
答案 0 :(得分：0)
1 /第123行，您可以清除列表，只需初始化它：
logs = new List<string>();
2 /要搜索结果，您可以使用：
var found = searchWord.FirstOrDefault(p=>p.Key == myValue);
if(found != null)
Console.Write("found");
else
Console.Write("Not found");