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...