[英]How do I check a users input value from the console against an array element? c#
我已经阅读了使用文本文件的单位转换并将其存储在array
。
我计划获取他们想要转换的每个度量的用户输入,并将它们与array
的element
进行比较,以便我可以引用它们以输入有效的输入。
使用(",")
拆分数组中的数据
数组中的数据以这种格式组织。 例如“盎司,克,28.0”
如何检查用户是否输入了密码输入? 例如,他们把盎司放在不是品脱之类的另一种不兼容的度量标准上。
到目前为止,这是我所做的事情
class Program
{
static void Main(string[] args)
{
Program myProgram = new Program();//call for program to start
myProgram.RunProgram();
}
public string inputA;
PUBLIC STRING InputB;
public decimal inputC;
string[] finalArray;
public class Conversion
{
public string measurementA { set; get; }
public string measurementB { set; get; }
public decimal converFac { set; get; }
}
public void RunProgram()
{
Console.WriteLine("Welcome to to our Conversion Calculator");
ReadFile();//read in text file
GetInput();//get the user input
//Validation();//validate it according to the data in the text file, redirect to getInput is not validated correctly
//Display();//display the result accordingly if validated correctly
//ReDo();//offer a restart or an exit to the program
}
public void ReadFile()
{
List<Conversion> Convert = new List<Conversion>();
using (StreamReader sr = new StreamReader(@"U:\convert.txt"))
{
while (sr.Peek() >= 0)
{
string str;
string[] srArray;
str = sr.ReadLine();
srArray = str.Split(',');
Conversion currentConversion = new Conversion();
currentConversion.measurementA = srArray[0];
currentConversion.measurementB = srArray[1];
currentConversion.converFac = decimal.Parse(srArray[2]);
finalArray = (string[])srArray.Clone();
}
}
}
public void GetInput()
{
Console.Write("Please enter your first unit of Measurement.");
inputA = Convert.ToString(Console.ReadLine());
//what do I put her to make sure that it corresponds with one of the measurementA elements in the array?
}
}
任何帮助,将不胜感激。 谢谢! 编辑:凹凸
使用try
catch
您可以修改它以提供更好的输出错误,例如:文件在行号不正确:
public List<Conversion> ReadFile()
{
List<Conversion> Convert = new List<Conversion>();
using (StreamReader sr = new StreamReader(@"U:\convert.txt"))
{
while (sr.Peek() >= 0)
{
string str;
string[] srArray;
str = sr.ReadLine();
srArray = str.Split(',');
Conversion currentConversion = new Conversion();
currentConversion.measurementA = srArray[0];
currentConversion.measurementB = srArray[1];
try{
currentConversion.converFac = decimal.Parse(srArray[2]);
}
catch(Exception ex){
Console.WriteLine("File is not in correct format");
break;
}
Convert.Add(currentConversion);
}
}
return Convert;
}
要比较数组中的度量单位,请使用Array.Find方法,如下所示
static void Main()
{
string[] array1 = { "kgs", "pounds"};
string value1 = Array.Find(array1,element => element=="kgs");
Console.WriteLine(value1);
Console.ReadKey();
}
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