如何添加textbox2和textbox4的值？ [英] How can I add the value of textbox2 and textbox4?
本文介绍了如何添加textbox2和textbox4的值？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想添加textbox2和textbox4的值，当我点击button1 total时，总和将显示在textbox9中。
我应该在button1中输入什么代码？
我尝试了什么：
命名空间登录
{
public partial class Form3：Form
{
public Form3（）
{
InitializeComponent（）;
}
private void button2_Click（ object sender，EventArgs e）
{
// 清除文本框和总标签/
textBox2.Text = ;
textBox4.Text = ;
textBox9.Text = ;
textBox1.Text = ;
textBox3.Text = ;
// 重置焦点
textBox9.Focus（）;
textBox2.Focus（）;
textBox4.Focus（）;
textBox3.Focus（）;
textBox1.Focus（）;
}
private void button4_Click（< span class =code-keyword> object sender，EventArgs e）
{
DialogResult iLogOut;
iLogOut = MessageBox.Show（ 你要退出吗？， 离开？，MessageBoxButtons.YesNo，MessageBoxIcon.Question）;
if （iLogOut == DialogResult.Yes）
{
Application.Exit（）;
}
}
private void button5_Click（ object sender，EventArgs e）
{
try
{
const double fries_small = 25 ;
const double fries_large = 40 ;
const double fries_bucket = 70 ;
double friesQuantity;
double friesTotal; // fries amount * cost
friesQuantity = INT .Parse（textBox1.Text）;
if （checkBox1.Checked == true ）
{
friesTotal = friesQuantity * fries_small;
textBox2.Text = friesTotal.ToString（ c）;
}
else if （checkBox2.Checked == true ）
{
friesTotal = friesQuantity * fries_large;
textBox2.Text = friesTotal.ToString（ c）;
}
else if （checkBox3.Checked == true ）
{
friesTotal = friesQuantity * fries_bucket;
textBox2.Text = friesTotal.ToString（ c）;
}
else
{
MessageBox.Show（ 请填写订单）;
}
}
catch （例外）
{
MessageBox.Show（< span class =code-string> 请填写订单）;
}
}
private void Form3_Load（ object sender，EventArgs e）
{
MessageBox.Show（ 提供原味的薯条和价格实惠的饮品，立即订购！）;
}
private void button6_Click（ object sender，EventArgs e）
{
try
{
const double bev_water = 20 ;
const double bev_icedtea = 25 ;
const double bev_coke = 30 ;
double bevQuantity = int .Parse（textBox3.Text）;
double beveragesTotal; // 饮料金额*费用
if （checkBox4.Checked == true ）
{
beveragesTotal = bevQuantity * bev_water;
textBox4.Text = beveragesTotal.ToString（ c）;
}
else if （checkBox5.Checked == true ）
{
beveragesTotal = bevQuantity * bev_icedtea;
textBox4.Text = beveragesTotal.ToString（ c）;
}
else if （checkBox6.Checked == true ）
{
beveragesTotal = bevQuantity * bev_coke;
textBox4.Text = beveragesTotal.ToString（ c）;
}
else
{
MessageBox.Show（ 请填写订单）;
}
}
catch （例外）
{
MessageBox.Show（ 请填写订单）;
}
}
private void button1_Click（ object sender，EventArgs e）
{
}
}
}
解决方案
Hi Sheena，
代码本身需要一个很多好的重塑。
你需要做的第一件事是给文本框和按钮一个好名字。请记住，一个好名字应该充分描述他们所采取的行动;它减少了评论的工作。
建议例如：<$ p$p> button2 - >重命名为'ResetBtn'
button4 - >重命名为'ExitBtn'
button5 - >重命名为'FriesOrderBtn'
button6 - >重命名为'BeveragesOrderBtn'
button1 - >重命名为'TotalPriceBtn'
checkBox1 - >重命名为'SmallFriesCheckBox'
.....................
................ .....
等。以下代码在文本框之间进行不必要的跳转：
//重置焦点
textBox9.Focus（）;
textBox2.Focus（）;
textBox4.Focus（）;
textBox3.Focus（）;
textBox1.Focus（）;这可能只是最后一行;前四行导致控件之间不必要的跳转。
textBox1.Focus（）;您需要做的另一件事是将所有常量放在代码的顶部;如果你把它们放在方法中，它看起来不专业。常量是在编译时创建的，而不是在运行时创建的。它不像是你移动到方法时创建的;它们是在程序开始时创建的。
另一个建议是，将代码包装在try-catch块。你永远不知道在运行时可能会发生什么。
最后，你手上的问题 - 添加薯条和饮料的价格。您已经使用过该解决方案（int.Parse（textBox1.Text）），您可以使用相同的。private void button1_Click（object sender，EventArgs e）
{
// Check如果计算薯条和饮料的价格。如果没有那么返回。
if（string.IsNullOrEmpty（textBox2.Text）|| string.IsNullOrEmpty（textBox4.Text））
return;
try
{
int Total = int.Parse（textBox2.Text）+ int.Parse（textBox4.Text）;
textBox9.Text = Total.ToString（）;
}
catch（FormatException Ex）
{
MessageBox.Show（期待薯条和饮料价格框中的数字。
错误消息：+ Ex。信息）;
}
}
1。将货币字符串转换为数字
2.将两个数字相加
3.将其转换回货币
double drinksTotal，friesTotal;
double .TryParse（textBox4.Text，System.Globalization.NumberStyles.Currency，
System.Globalization.CultureInfo.CurrentCulture。 NumberFormat， out beveragesTotal）;
double .TryParse（textBox2.Text，System.Globalization.NumberStyles.Currency，
System.Globalization.CultureInfo.CurrentCulture。 NumberFormat， out friesTotal）;
textBox9.Text =（beveragesTotal + friesTotal）.ToString（ c）;
首先将文本框值转换为数值（如int，double。）
Ex- int val1 = Convert。 ToInt32（TextBox2.Text）;
int val2 = Convert.ToInt32（TextBox2.Text）;
第二次添加这些值...使用临时变量
ex- int result = val1 + val2;
三将此结果分配到TextBox
Ex- TextBox3.Text = result.ToString（）;
或
仅限一行
TextBox3.Text =（Convert.ToInt32（TextBox2.Text）+ Convert.ToInt32（TextBox2.Text））;
I want to add the values of textbox2 and textbox4 and the sum will show in textbox9 when I click the button1 total.
what code should I put in button1?
What I have tried:
namespace LogIn
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}
private void button2_Click(object sender, EventArgs e)
{
// Clear the Textboxes and the total labels/
textBox2.Text="";
textBox4.Text="";
textBox9.Text = "";
textBox1.Text="";
textBox3.Text="";
// reset the focus
textBox9.Focus();
textBox2.Focus();
textBox4.Focus();
textBox3.Focus();
textBox1.Focus();
}
private void button4_Click(object sender, EventArgs e)
{
DialogResult iLogOut;
iLogOut = MessageBox.Show("Do you want to Log Out?", "Leave?", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (iLogOut == DialogResult.Yes)
{
Application.Exit();
}
}
private void button5_Click(object sender, EventArgs e)
{
try
{
const double fries_small = 25;
const double fries_large = 40;
const double fries_bucket = 70;
double friesQuantity;
double friesTotal; // fries amount * cost
friesQuantity = int.Parse(textBox1.Text);
if (checkBox1.Checked == true)
{
friesTotal = friesQuantity * fries_small;
textBox2.Text = friesTotal.ToString("c");
}
else if (checkBox2.Checked == true)
{
friesTotal = friesQuantity * fries_large;
textBox2.Text = friesTotal.ToString("c");
}
else if (checkBox3.Checked == true)
{
friesTotal = friesQuantity * fries_bucket;
textBox2.Text = friesTotal.ToString("c");
}
else
{
MessageBox.Show("Fill the order form please");
}
}
catch (Exception)
{
MessageBox.Show("Please fill out the order form");
}
}
private void Form3_Load(object sender, EventArgs e)
{
MessageBox.Show("Original flavored fries and affordable drinks available, Order Now!");
}
private void button6_Click(object sender, EventArgs e)
{
try
{
const double bev_water = 20;
const double bev_icedtea = 25;
const double bev_coke = 30;
double bevQuantity = int.Parse(textBox3.Text);
double beveragesTotal; // beverage amount * cost
if (checkBox4.Checked == true)
{
beveragesTotal = bevQuantity * bev_water;
textBox4.Text = beveragesTotal.ToString("c");
}
else if (checkBox5.Checked == true)
{
beveragesTotal = bevQuantity * bev_icedtea;
textBox4.Text = beveragesTotal.ToString("c");
}
else if (checkBox6.Checked == true)
{
beveragesTotal = bevQuantity * bev_coke;
textBox4.Text = beveragesTotal.ToString("c");
}
else
{
MessageBox.Show("Fill the order form please");
}
}
catch(Exception)
{
MessageBox.Show("Please fill out the order form");
}
}
private void button1_Click(object sender, EventArgs e)
{
}
}
} 解决方案
Hi Sheena,
The code itself needs a lot of good reshaping.
The first thing you need to do is give a good name to the textboxes and buttons. Remember, a good name should sufficiently describe the actions they are up to; it reduces commenting efforts.
Suggestions E.g.:button2 -> Rename as 'ResetBtn' button4 -> Rename as 'ExitBtn' button5 -> Rename as 'FriesOrderBtn' button6 -> Rename as 'BeveragesOrderBtn' button1 -> Rename as 'TotalPriceBtn' checkBox1 -> Rename as 'SmallFriesCheckBox' ..................... ..................... etc.The following code makes unnecessary jumps between the textboxes:
// reset the focus textBox9.Focus(); textBox2.Focus(); textBox4.Focus(); textBox3.Focus(); textBox1.Focus();This can simply be just the last line; the first four lines are causing unnecessary trips between the controls.
textBox1.Focus();Another thing you need to do is bring all constants at the top of the code; it looks unprofessional if you put them inside methods. Constants are created at compile time, not at runtime. It is not like they are created when you move to the method; they are created at the start of the program.
Another suggestion is, wrap your code intry-catchblocks. You never know what might happen in runtime.
Finally, the problem at your hand - adding the price of fries and beverages. You already used the solution (int.Parse(textBox1.Text)), you can use the same.private void button1_Click(object sender, EventArgs e) { // Check if prices for fries and beverages are calculated yet. If not then return. if (string.IsNullOrEmpty(textBox2.Text) || string.IsNullOrEmpty(textBox4.Text)) return; try { int Total = int.Parse(textBox2.Text) + int.Parse(textBox4.Text); textBox9.Text = Total.ToString(); } catch (FormatException Ex) { MessageBox.Show("Expecting numbers in the price boxes of fries and beverages. Error msg: " + Ex.Message); } }
1. convert the currency string into number
2. sum the two number
3. convert it back into currency
double beveragesTotal, friesTotal; double.TryParse(textBox4.Text, System.Globalization.NumberStyles.Currency, System.Globalization.CultureInfo.CurrentCulture.NumberFormat, out beveragesTotal); double.TryParse(textBox2.Text, System.Globalization.NumberStyles.Currency, System.Globalization.CultureInfo.CurrentCulture.NumberFormat, out friesTotal); textBox9.Text = (beveragesTotal + friesTotal).ToString("c");
First Convert textbox value into numeric value(like int,double.)
Ex- int val1 = Convert.ToInt32(TextBox2.Text);
int val2 = Convert.ToInt32(TextBox2.Text);
Second Add those value...using a temp variable
Ex- int result = val1+val2;
Third Assign this result into TextBox
Ex- TextBox3.Text= result.ToString();
Or
In Only One Line
TextBox3.Text = (Convert.ToInt32(TextBox2.Text) + Convert.ToInt32(TextBox2.Text));
这篇关于如何添加textbox2和textbox4的值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
