C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;

namespace Nancy.Demo
{
	/*
		Object-Model
	*/
    public class Calculation
    {
	
		[Required]
        public string expression { get; set; }
			
		public string history { get; set; }
		
        public double firstNumber { get; set; }
		
		public double secondNumber { get; set; }
		
		public double result { get; set; }

		[StringLength(1)]
        public string Operation { get; set; }
    }
	
	/*
		Util Klasse zum Analysieren des Expression-String
	*/
	public static class ExpressionUtil{
		public static string extractFirstNumber(string expr, int operationIndex){
			return expr.Substring(0,operationIndex);
		}
		
		public static string extractSecondNumber(string expr, int operationIndex){
			return expr.Substring(operationIndex+1,expr.Length-1-operationIndex);
		}
		
		public static int extractOperationIndex(string expr){			
			int index = -1;
			if(expr.IndexOf('+') != -1){
				index = expr.IndexOf('+');
			}else if(expr.IndexOf('-') != -1 && expr.IndexOf('-')!= 0){
				index = expr.IndexOf('-');
			}else if(expr.IndexOf('/') != -1){
				index = expr.IndexOf('/');
			}else if(expr.IndexOf('*') != -1){
				index = expr.IndexOf('*');
			}
			return index;
		}
	}
	
	/*
		Klasse zum Rechnen
	*/
	public static class CalculationUtil{
		
		public static double calculate(double x, double y, string expr, int operationIndex){
			
			if(expr.ToCharArray()[operationIndex] == '+'){
				return x+y;
			} else if(expr.ToCharArray()[operationIndex] == '-'){
				return x-y;
			} else if(expr.ToCharArray()[operationIndex] == '*'){
				return x*y;
			} else if(expr.ToCharArray()[operationIndex] == '/'){
				return x/y;
			}
			
			return -1;
		}
	}
}

Model

​x
 
using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;
​
namespace Nancy.Demo
{
    /*
        Object-Model
    */
    public class Calculation
    {
    
        [Required]
        public string expression { get; set; }
            
        public string history { get; set; }
        
        public double firstNumber { get; set; }
        
        public double secondNumber { get; set; }
        
        public double result { get; set; }
​
        [StringLength(1)]
        public string Operation { get; set; }
    }
    
    /*
        Util Klasse zum Analysieren des Expression-String
    */
    public static class ExpressionUtil{
        public static string extractFirstNumber(string expr, int operationIndex){
            return expr.Substring(0,operationIndex);
        }
        
        public static string extractSecondNumber(string expr, int operationIndex){
            return expr.Substring(operationIndex+1,expr.Length-1-operationIndex);
        }
        
        public static int extractOperationIndex(string expr){           
            int index = -1;
            if(expr.IndexOf('+') != -1){
                index = expr.IndexOf('+');
            }else if(expr.IndexOf('-') != -1 && expr.IndexOf('-')!= 0){
                index = expr.IndexOf('-');
            }else if(expr.IndexOf('/') != -1){
                index = expr.IndexOf('/');
            }else if(expr.IndexOf('*') != -1){
                index = expr.IndexOf('*');
            }
            return index;
        }
    }
    
    /*
        Klasse zum Rechnen
    */
    public static class CalculationUtil{
        
        public static double calculate(double x, double y, string expr, int operationIndex){
            
            if(expr.ToCharArray()[operationIndex] == '+'){
                return x+y;
            } else if(expr.ToCharArray()[operationIndex] == '-'){
                return x-y;
            } else if(expr.ToCharArray()[operationIndex] == '*'){
                return x*y;
            } else if(expr.ToCharArray()[operationIndex] == '/'){
                return x/y;
            }
            
            return -1;
        }
    }
}

<html>
  <head>
    <title>Customers</title>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<!-- CSS Includes -->
	<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">

  </head>
  <body>
	<nav class="navbar navbar-default">
		<div class="container-fluid">
			<div class="navbar-header">
				<a class="navbar-brand" href="#">Taschenrechner</a>
			</div>
		</div>
	</nav>
	<div class="container">	
		
		<form id="calcForm" method="POST" action="@Url.Content("~/add")" class="navbar-form">
		
		<div class="panel panel-default">
		    <div class="panel-heading">Liste vergangener Operationen. (Klicken, um Resultat in nächste Rechnung einzufügen)</div>
			<div class="panel-body">

				<ul class="list-group">
				@foreach(var calc in Model)
				{
					
					<li class="list-group-item" onclick="setVal(this);"><b>@calc.expression</b> = @calc.result</li>
				}
					
				<input name="history" type="text" readonly="readonly" value="@foreach(var calc in Model)
				{@(calc.expression+';')}" hidden/>
					
				</ul>

			</div>
		</div>

		
		
		<table border="1"> 
						
						 <tr> 
							<td colspan="3"><input name="expression" type="text" id="result" readonly="readonly"/></td> 
							<!-- clear Funktion -->
							<td><input type="button" value="c" onclick="addInput('c')"/> </td> 
						 </tr> 
						 <tr> 							
							<td><input id="btn1" type="button" value="1" class="btn" onclick="addInput('1')"/> </td> 
							<td><input id="btn2" type="button" value="2" class="btn" onclick="addInput('2')"/> </td> 
							<td><input id="btn3" type="button" value="3" class="btn" onclick="addInput('3')"/> </td> 
							<td><input id="btnDiv" type="button" value="/" onclick="addInput('/')"/> </td> 
						 </tr> 
						 <tr> 
							<td><input  id="btn4" type="button" value="4" class="btn" onclick="addInput('4')"/> </td> 
							<td><input  id="btn5" type="button" value="5" class="btn" onclick="addInput('5')"/> </td> 
							<td><input id="btn6" type="button" value="6" class="btn" onclick="addInput('6')"/> </td> 
							<td><input id="btnMinus" type="button" value="-" onclick="addInput('-')"/> </td> 
						 </tr> 
						 <tr> 
							<td><input  id="btn7" type="button" value="7" class="btn" onclick="addInput('7')"/> </td> 
							<td><input  id="btn8" type="button" value="8" class="btn" onclick="addInput('8')"/> </td> 
							<td><input  id="btn9" type="button" value="9" class="btn" onclick="addInput('9')"/> </td> 
							<td><input  id="btnPlus" type="button" value="+" onclick="addInput('+')"/> </td> 
						 </tr> 
						 <tr> 
							<td><input  id="btnDot" type="button" value="." class="btn" onclick="addInput('.')"/> </td> 
							<td><input  id="btn0" type="button" value="0" class="btn" onclick="addInput('0')"/> </td> 
						
							<td>
								<input id="subBtn" type="submit" class="btn btn-primary" value="="/><br/>															 							
								</td> 
							<td><input type="button" value="*" onclick="addInput('*')"/> </td> 
						 </tr> 
					  </table> 
			
		
	  </form>
	  
	  <script>
	  		var inputs = [];
		  
		  	function setVal(expr){
		  		document.getElementById('result').value = "";
		  	 	addInput(expr.innerHTML.substring(expr.innerHTML.indexOf('=')+2,expr.innerHTML.length));	
		  	}
			
			function addInput(element){	
		  		if(element === 'c'){
		  			inputs = [];
		  			document.getElementById('result').value = "";
		  			return;
		  		}
		  
		  		if(element === '+' ||  element === '*' || element ==='/'){
		  			if(inputs.includes('+') || inputs.includes('*') ||inputs.includes('/')){
		  				subBtn.click();
		  				return;
		  			}
		  		}
		  		
				inputs.push(element);
				document.getElementById('result').value = "";		 
				for(var input in inputs){
					document.getElementById('result').value = document.getElementById('result').value+inputs[input];
				}
			}  
		  	

			$(document).keydown(function(e) {
				switch(e.which) {
		  			case 96: btn0.click(); break;
					case 97: btn1.click(); break;
					case 98: btn2.click(); break;
					case 99: btn3.click(); break;
					case 100: btn4.click(); break;
					case 101: btn5.click(); break;
					case 102: btn6.click(); break;
					case 103: btn7.click(); break;
					case 104: btn8.click(); break;
					case 105: btn9.click(); break;
					case 38: // up
					break;

					default: return; // exit this handler for other keys
				}
				e.preventDefault(); // prevent the default action (scroll / move caret)
			});
	  
	  </script>
	  
	</div>
  </body>
</html>

View

 
<html>
  <head>
    <title>Customers</title>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- CSS Includes -->
    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
​
  </head>
  <body>
    <nav class="navbar navbar-default">
        <div class="container-fluid">
            <div class="navbar-header">
                <a class="navbar-brand" href="#">Taschenrechner</a>
            </div>
        </div>
    </nav>
    <div class="container"> 
        
        <form id="calcForm" method="POST" action="@Url.Content("~/add")" class="navbar-form">
        
        <div class="panel panel-default">
            <div class="panel-heading">Liste vergangener Operationen. (Klicken, um Resultat in nächste Rechnung einzufügen)</div>
            <div class="panel-body">
​
                <ul class="list-group">
                @foreach(var calc in Model)
                {
                    
                    <li class="list-group-item" onclick="setVal(this);"><b>@calc.expression</b> = @calc.result</li>
                }
                    
                <input name="history" type="text" readonly="readonly" value="@foreach(var calc in Model)
                {@(calc.expression+';')}" hidden/>
                    
                </ul>
​
            </div>
        </div>
​
        
        
        <table border="1"> 
                        
                         <tr> 
                            <td colspan="3"><input name="expression" type="text" id="result" readonly="readonly"/></td> 
                            <!-- clear Funktion -->
                            <td><input type="button" value="c" onclick="addInput('c')"/> </td> 
                         </tr> 
                         <tr>                           
                            <td><input id="btn1" type="button" value="1" class="btn" onclick="addInput('1')"/> </td> 
                            <td><input id="btn2" type="button" value="2" class="btn" onclick="addInput('2')"/> </td> 
                            <td><input id="btn3" type="button" value="3" class="btn" onclick="addInput('3')"/> </td> 
                            <td><input id="btnDiv" type="button" value="/" onclick="addInput('/')"/> </td> 
                         </tr> 
                         <tr> 
                            <td><input  id="btn4" type="button" value="4" class="btn" onclick="addInput('4')"/> </td> 
                            <td><input  id="btn5" type="button" value="5" class="btn" onclick="addInput('5')"/> </td> 
                            <td><input id="btn6" type="button" value="6" class="btn" onclick="addInput('6')"/> </td> 
                            <td><input id="btnMinus" type="button" value="-" onclick="addInput('-')"/> </td> 
                         </tr> 
                         <tr> 
                            <td><input  id="btn7" type="button" value="7" class="btn" onclick="addInput('7')"/> </td> 
                            <td><input  id="btn8" type="button" value="8" class="btn" onclick="addInput('8')"/> </td> 
                            <td><input  id="btn9" type="button" value="9" class="btn" onclick="addInput('9')"/> </td> 
                            <td><input  id="btnPlus" type="button" value="+" onclick="addInput('+')"/> </td> 
                         </tr> 
                         <tr> 
                            <td><input  id="btnDot" type="button" value="." class="btn" onclick="addInput('.')"/> </td> 
                            <td><input  id="btn0" type="button" value="0" class="btn" onclick="addInput('0')"/> </td> 
                        
                            <td>
                                <input id="subBtn" type="submit" class="btn btn-primary" value="="/><br/>                                                                                       
                                </td> 
                            <td><input type="button" value="*" onclick="addInput('*')"/> </td> 
                         </tr> 
                      </table> 
            
        
      </form>
      
      <script>
            var inputs = [];
          
            function setVal(expr){
                document.getElementById('result').value = "";
                addInput(expr.innerHTML.substring(expr.innerHTML.indexOf('=')+2,expr.innerHTML.length));    
            }
            
            function addInput(element){ 
                if(element === 'c'){
                    inputs = [];
                    document.getElementById('result').value = "";
                    return;
                }
          
                if(element === '+' ||  element === '*' || element ==='/'){
                    if(inputs.includes('+') || inputs.includes('*') ||inputs.includes('/')){
                        subBtn.click();
                        return;
                    }
                }
                
                inputs.push(element);
                document.getElementById('result').value = "";        
                for(var input in inputs){
                    document.getElementById('result').value = document.getElementById('result').value+inputs[input];
                }
            }  
            
​
            $(document).keydown(function(e) {
                switch(e.which) {
                    case 96: btn0.click(); break;
                    case 97: btn1.click(); break;
                    case 98: btn2.click(); break;
                    case 99: btn3.click(); break;
                    case 100: btn4.click(); break;
                    case 101: btn5.click(); break;
                    case 102: btn6.click(); break;
                    case 103: btn7.click(); break;
                    case 104: btn8.click(); break;
                    case 105: btn9.click(); break;
                    case 38: // up
                    break;
​
                    default: return; // exit this handler for other keys
                }
                e.preventDefault(); // prevent the default action (scroll / move caret)
            });
      
      </script>
      
    </div>
  </body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using Nancy;
using Nancy.ModelBinding;
using Nancy.Extensions;
using Nancy.Validation;

namespace Nancy.Demo
{
	public class CalcModule : NancyModule
	{		
		public static List<Calculation> calcList { get; set; }
			
		public CalcModule()
		{
			// index is an entry point
			Get["/index"] = parameters =>
			{
				var customers = GetCalculations();
				return View[customers];
			};
			
			Post["/add"] = parameters =>{
				var calculation = this.Bind<Calculation>();

				// lets validate it
				var result = this.Validate<Calculation>(calculation);
				if (!result.IsValid)
				{
					return RenderErrorView(result);
				}
				
				//Stelle des Operanden finden
				int oIndex= ExpressionUtil.extractOperationIndex(calculation.expression);
				
				
				if(oIndex == -1){ // Falls kein Operant
					calculation.result = Convert.ToDouble(calculation.expression);
				} else {				
					calculation.firstNumber = Convert.ToDouble(ExpressionUtil.extractFirstNumber(calculation.expression, oIndex));
					calculation.secondNumber = Convert.ToDouble(ExpressionUtil.extractSecondNumber(calculation.expression, oIndex));
					calculation.result = CalculationUtil.calculate(calculation.firstNumber, calculation.secondNumber, calculation.expression, oIndex);
				}
				
				var calculations = new List<Calculation>();
				
				
				
				foreach (var element in calculation.history.Split(';'))
				{	
					if(element.Length > 1){
						int opIndex = -1;
						
						Calculation historyCalc = new Calculation();
						historyCalc.expression = element;
						opIndex= ExpressionUtil.extractOperationIndex(historyCalc.expression);
						historyCalc.firstNumber = Convert.ToDouble(ExpressionUtil.extractFirstNumber(element, opIndex));
						historyCalc.secondNumber = Convert.ToDouble(ExpressionUtil.extractSecondNumber(element, opIndex));
						historyCalc.result = CalculationUtil.calculate(historyCalc.firstNumber, historyCalc.secondNumber, element, opIndex);
						calculations.Add(historyCalc);
					}					
				}				
				
				calculations.Add(calculation);
				return View[calculations];
			};
		}
	
		private string RenderErrorView(ModelValidationResult result)
		{
			var url = string.Format("<a href='{0}'>Back to List</a>", this.Context.ToFullPath("~/index"));
			var errorsDescription = 
				result.Errors.
					SelectMany(e => 
							   e.Value.Select(error => error.ErrorMessage)).ToList();
			
			return "Sorry, but your data is invalid. " + url + "<br/>Errors: <br/>" + 
					string.Join(", <br/>", errorsDescription);

		}

		private List<Calculation> GetCalculations()
		{
			if(calcList == null){
				calcList = new List<Calculation>()
				{
					new Calculation()
					{
						expression = "1+3",
						firstNumber = 1,
						secondNumber = 3,
						result = 4,
						Operation = "+"
					}					
				};
				return calcList;
			} else {
				return calcList;
			}
			
		}

	}
}

Module

 
using System;
using System.Collections.Generic;
using System.Linq;
using Nancy;
using Nancy.ModelBinding;
using Nancy.Extensions;
using Nancy.Validation;
​
namespace Nancy.Demo
{
    public class CalcModule : NancyModule
    {       
        public static List<Calculation> calcList { get; set; }
            
        public CalcModule()
        {
            // index is an entry point
            Get["/index"] = parameters =>
            {
                var customers = GetCalculations();
                return View[customers];
            };
            
            Post["/add"] = parameters =>{
                var calculation = this.Bind<Calculation>();
​
                // lets validate it
                var result = this.Validate<Calculation>(calculation);
                if (!result.IsValid)
                {
                    return RenderErrorView(result);
                }
                
                //Stelle des Operanden finden
                int oIndex= ExpressionUtil.extractOperationIndex(calculation.expression);
                
                
                if(oIndex == -1){ // Falls kein Operant
                    calculation.result = Convert.ToDouble(calculation.expression);
                } else {                
                    calculation.firstNumber = Convert.ToDouble(ExpressionUtil.extractFirstNumber(calculation.expression, oIndex));
                    calculation.secondNumber = Convert.ToDouble(ExpressionUtil.extractSecondNumber(calculation.expression, oIndex));
                    calculation.result = CalculationUtil.calculate(calculation.firstNumber, calculation.secondNumber, calculation.expression, oIndex);
                }
                
                var calculations = new List<Calculation>();
                
                
                
                foreach (var element in calculation.history.Split(';'))
                {   
                    if(element.Length > 1){
                        int opIndex = -1;
                        
                        Calculation historyCalc = new Calculation();
                        historyCalc.expression = element;
                        opIndex= ExpressionUtil.extractOperationIndex(historyCalc.expression);
                        historyCalc.firstNumber = Convert.ToDouble(ExpressionUtil.extractFirstNumber(element, opIndex));
                        historyCalc.secondNumber = Convert.ToDouble(ExpressionUtil.extractSecondNumber(element, opIndex));
                        historyCalc.result = CalculationUtil.calculate(historyCalc.firstNumber, historyCalc.secondNumber, element, opIndex);
                        calculations.Add(historyCalc);
                    }                   
                }               
                
                calculations.Add(calculation);
                return View[calculations];
            };
        }
    
        private string RenderErrorView(ModelValidationResult result)
        {
            var url = string.Format("<a href='{0}'>Back to List</a>", this.Context.ToFullPath("~/index"));
            var errorsDescription = 
                result.Errors.
                    SelectMany(e => 
                               e.Value.Select(error => error.ErrorMessage)).ToList();
            
            return "Sorry, but your data is invalid. " + url + "<br/>Errors: <br/>" + 
                    string.Join(", <br/>", errorsDescription);
​
        }
​
        private List<Calculation> GetCalculations()
        {
            if(calcList == null){
                calcList = new List<Calculation>()
                {
                    new Calculation()
                    {
                        expression = "1+3",
                        firstNumber = 1,
                        secondNumber = 3,
                        result = 4,
                        Operation = "+"
                    }                   
                };
                return calcList;
            } else {
                return calcList;
            }
            
        }
​
    }
}

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Compilation error (line 8, col 36): ; expected

Last Run:	6:46:34 pm
Compile:	0s
Execute:	0.173s
Memory:	0b
CPU:	0s

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