我正在尝试学习课程,这意味着在 Windows 表单之外编写代码并在表单中调用该代码。我在表单中创建了一个基本计算,它可以工作。问题是,我想知道如何将整个计算移动到一个类中,并在加载时或单击控件时将其调用到表单中。这没用!
这是我的本地版本或表单版本: 请注意,表单将在第一次计算时加载,因为单选按钮在加载时被选中。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Calculations
{
public partial class Calculations : Form
{
public Calculations()
{
InitializeComponent();
}
public decimal SalesTax = 0.065M;
public decimal AppliedTax;
public decimal Price;
public decimal SubTotal;
public decimal GrandTotal;
public object Calc()
{
Int32 GetQuantity = Convert.ToInt32(txtQuantity.Text);
SubTotal = (Price * GetQuantity);
AppliedTax = (SubTotal * SalesTax);
GrandTotal = (SubTotal + AppliedTax);
if (radRed.Checked == true)
{
Price = 100;
}
else if (radBlue.Checked == true)
{
Price = 200;
}
else if (radGreen.Checked == true)
{
Price = 300;
}
lblPrice.Text = GrandTotal.ToString("c");
return GrandTotal;
}
private void Calculations_Load(object sender, EventArgs e)
{
txtQuantity.Text = "10";
radRed.Checked = true;
Calc();
}
private void radRed_CheckedChanged(object sender, EventArgs e)
{
Calc();
}
private void radBlue_CheckedChanged(object sender, EventArgs e)
{
Calc();
}
private void radGreen_CheckedChanged(object sender, EventArgs e)
{
Calc();
}
private void btnCalculate_Click(object sender, EventArgs e)
{
Calc();
}
}
}
这是我尝试将所有这些放在一个类中:它可以工作但不能加载,您必须先检查另一个单选按钮
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Calculations
{
class ClsCalc
{
class ClsRef
{
public static Calculations FormCtrls
{
get
{
return Calculations.ActiveForm as Calculations;
}
}
}
public static decimal SalesTax = 0.065M;
public static decimal AppliedTax;
public static decimal Price;
public static decimal SubTotal;
public static decimal GrandTotal;
public static object Calc()
{
Int32 GetQuantity = Convert.ToInt32(ClsRef.FormCtrls.txtQuantity.Text);
SubTotal = (Price * GetQuantity);
AppliedTax = (SubTotal * SalesTax);
GrandTotal = (SubTotal + AppliedTax);
if (ClsRef.FormCtrls.radRed.Checked == true)
{
Price = 100;
}
else if (ClsRef.FormCtrls.radBlue.Checked == true)
{
Price = 200;
}
else if (ClsRef.FormCtrls.radGreen.Checked == true)
{
Price = 300;
}
ClsRef.FormCtrls.lblPrice.Text = GrandTotal.ToString("c");
return GrandTotal;
}
}
}
最后我以 Load 事件的形式调用它:
ClsCalc.Calc();
请注意,这不是一个真正的项目,只是一种学习方式,对我来说就是这样。
谢谢!