【发布时间】：2022-01-13 08:20:58
【问题描述】：
我正在尝试创建一个简单的表格来计算速度、距离和旅行时间，但计算结果是错误的。
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 _2ndTask
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
double speed, time, distance, laiks, garums, atrums; // laiks = time2, garums = distance2, atrums = speed2
private void label1_Click_1(object sender, EventArgs e)
{
}
private void textBox3_TextChanged(object sender, EventArgs e)
{
bool timeInput = double.TryParse(textBox3.Text, out laiks);
if (!timeInput || laiks < 0 || laiks > 9999)
{
// MessageBox.Show("Ignorēt šo paziņojumu.");
}
// timeInput = float.Parse (textBox3.Text);
}
private void textBox2_TextChanged2(object sender, EventArgs e)
{
bool cGarumsInput = double.TryParse(textBox2.Text, out garums);
if (!cGarumsInput || garums < 0 || garums > 999999)
{
// MessageBox.Show("Ignorēt šo paziņojumu.");
}
}
private void textBox1_TextChanged_1(object sender, EventArgs e)
{
bool speedInput = double.TryParse(textBox3.Text, out atrums);
if (!speedInput || atrums < 0 || atrums > 9999)
{
// MessageBox.Show("Ignorēt šo paziņojumu.");
}
}
private void button2_Click(object sender, EventArgs e)
{
time = (garums / atrums);
label4.Text = time.ToString();
}
private void panel1_Paint(object sender, PaintEventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
distance = atrums * laiks;
label4.Text = distance.ToString() + " Km.";
}
private void button1_Click(object sender, EventArgs e)
{
speed = garums / laiks;
label4.Text = speed.ToString() + " Km/h.";
}
}
}
在我添加 TryParse 之前，计算是正确的，但只要从文本框中删除值，表单就会崩溃。
它应该在下面输出 140（乘以时间和速度）而不是输出 49。输入其他数字也会给出错误的结果
【问题讨论】：