MVC中的简单图形计算器 ASP.NET 如MS Windows计算器

Simple graphical calculator in ASP.NET MVC like MS Windows Calculator

本文关键字：计算器 NET MS Windows ASP MVC 简单 图形      更新时间：2023-09-26

当我单击btnOne -> btn0 -> btnPlus> btn2 -> btn1 时，我在 MVC ASP.NET 获取表达式时遇到问题。我想要这个表达式：10+21，单击btnEqual后，我想获取此表达式的总和，并且只获得一个值，就像在简单的窗口计算器中一样textBox31。怎么做？

我有名为Calculate的视图：

<body>
<div id="CalculatorSpace">
    <form name="Calc">
        <input type="text" name="textBox" id="textBox" value=""/>
        <table>
            <tr>
                <td><input type="button" name="btnSeven" id="btnSeven" value="7" /></td>
                <td><input type="button" id="btnEight" value="8" /></td>
                <td><input type="button" id="btnNine" value="9" /></td>
                <td><input type="button" id="btnDelete" value="DEL" /></td>
                <td><input type="button" id="btnClear" value="CLR" /></td>
            </tr>
            <tr>
                <td><input type="button" id="btnFour" value="4" /></td>
                <td><input type="button" id="btnFive" value="5" /></td>
                <td><input type="button" id="btnSix" value="6" /></td>
                <td><input type="button" id="btnMultiply" value="*" /></td>
                <td><input type="button" id="btnDivide" value="/" /></td>
            </tr>
            <tr>
                <td><input type="button" id="btnOne" value="1" /></td>
                <td><input type="button" id="btnTwo" value="2" /></td>
                <td><input type="button" id="btnThree" value="3" /></td>
                <td><input type="button" id="btnPlus" value="+" /></td>
                <td><input type="button" id="btnMinus" value="-" /></td>
            </tr>
            <tr>
                <td><input type="button" id="btnZero" value="0" /></td>
                <td><input type="button" id="btnDot" value="." /></td>
                <td><input type="button" id="btnEqual" value="=" /></td>
            </tr>
        </table>
        <script>
            window.onload = function () {
                document.getElementById('btnSeven').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnSeven').value;
                });
                document.getElementById('btnEight').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnEight').value;
                });
                document.getElementById('btnNine').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnNine').value;
                });
                document.getElementById('btnDelete').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnDelete').value;
                });
                document.getElementById('btnClear').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnClear').value;
                });
                document.getElementById('btnFour').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnFour').value;
                });
                document.getElementById('btnFive').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnFive').value;
                });
                document.getElementById('btnSix').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnSix').value;
                });
                document.getElementById('btnMultiply').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnMultiply').value;
                });
                document.getElementById('btnDivide').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnDivide').value;
                });
                document.getElementById('btnOne').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnOne').value;
                });
                document.getElementById('btnTwo').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnTwo').value;
                });
                document.getElementById('btnThree').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnThree').value;
                });
                document.getElementById('btnPlus').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnPlus').value;
                });
                document.getElementById('btnMinus').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnMinus').value;
                });
                document.getElementById('btnZero').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnZero').value;
                });
                document.getElementById('btnDot').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnDot').value;
                });
                document.getElementById('btnEqual').addEventListener('click', function () {
                    document.getElementById('textBox').value = document.getElementById('textBox').value + document.getElementById('btnEqual').value;
                });
            }
        </script>
    </form>
</div>

我有计算器控制器看起来像这样：

    public class CalculatorController : Controller
{
    //
    // GET: /Calculator/
    public ActionResult Index()
    {
        return View();
    }
    //GET: /Calculator/Calculate
    public ActionResult Calculate(string value)
    {
        return View();
    }
}

当您单击btnEqual进行数据计算时，现在如何在表达式x + x中输入（与按 +、-、*、/）相比？

将 NCalc 导入到项目中，然后将textBox传递给控制器并返回Expression的结果。

public ActionResult Calculate(String textBox)
{
    Expression e = new Expression(textBox);
    MyViewModel model = new MyViewModel {
        Answer = e.Evaluate()
    };
    return View(model);
}

或者类似的东西...

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