如何在第4个文本框中汇总3个文本框值 [英] how to sum 3 textbox values in 4th textbox

问题描述

我必须总结txt1 + txt2 + txt3 int txt4。

用户可能会也可能不会在所有三个文本框中输入值。

i已从以下代码中获取代码项目解决了答案，但这不起作用。

请帮忙。

.cs代码

 < span class =code-keyword> protected   void  txtlog_TextChanged（ object  sender，EventArgs e ）
 {
  if （（！string.IsNullOrEmpty（txtlog.Text））&&（！string.IsNullOrEmpty（txtPole.Text） ））&&（！string.IsNullOrEmpty（txtDangri.Text）））
 {
 txtTotalQty.Text =（Convert.ToInt32（txtlog.Text）+ Convert.ToInt32（txtPole.Text）+ Convert.ToInt32（txtDangri.Text））的ToString（）; 
} 
} 
 受保护  void  txtPole_TextChanged（ object  sender，EventArgs e）
 {
  if （（！string.IsNullOrEmpty（txtlog.Text ））&&（！string.IsNullOrEmpty（txtPole.Text））&&（！string.IsNullOrEmpty（txtDangri.Text）））
 {
 txtTotalQty.Text =（Convert.ToInt32 （txtlog.Text）+ Convert.ToInt32（txtPole.Text）+ Convert.ToInt32（txtDangri.Text））。ToString（）; 
} 
} 
 受保护  void  txtDangri_TextChanged（ object  sender，EventArgs e）
 {
  if （（！string.IsNullOrEmpty（txtlog.Text ））&&（！string.IsNullOrEmpty（txtPole.Text））&&（！string.IsNullOrEmpty（txtDangri.Text）））
 {
 txtTotalQty.Text =（Convert.ToInt32 （txtlog.Text）+ Convert.ToInt32（txtPole.Text）+ Convert.ToInt32（txtDangri.Text））。ToString（）; 
} 
} 

.aspx代码：

 <   asp：TextBox     ID   =  txtlog    runat   =  server   宽度  =  150px    
   
                                                  < span class =code-attribute>                                                 ontextchanged   =  txtlog_TextChanged >  10 
 <   asp：RequiredFieldValidator     ID   =  rvlog    runat   = 服务器                                          ControlToValidate   =  txtlog    显示  = 动态      SetFocusOnError   =  True >  * 
 
 <   asp：TextBox  < span class =code-attribute>   ID   =  txtPole    runat   =   server   宽度  =  150px    
   
     ontextchanged   =  txtPole_TextChanged < span class =code-keyword>>  
 <   asp：RequiredFieldValidator     ID   =  rvPole    runat   =  server    
   
         ControlToValidate   =  txtPole   显示  = 动态    
   
           SetFocusOnError   =  True >  * 
 
 
 <   asp：TextBox     ID   =  txtDangri    runat   =  server   宽度  =  150px    
   
       ontextchanged   =  txtDangri_TextChanged >  
 <   asp：RequiredFieldValidator     ID   =  rvDangri    runat   =  server    
   
           ControlToValidate   =   txtDangri   显示  = 动态    
   
           SetFocusOnError   =  True >  * 
 
 <   asp：TextBox     ID   =   txtTotalQty    runat  < span class =code-keyword> =  server   宽度  =  150px >  
 <   asp：RequiredFieldValidator     ID   =  rvTotalQty    runat   =  server    
   
       ControlToValidate   =  txtTotalQty    显示  = 动态    
   
         SetFocusOnError   =  True  >  * 

解决方案

< blockquote>您需要创建一个新的asp文件并在项目中添加4个asp文本框。相应地命名。

然后创建一个按钮，将总和添加到第4个文本框。你的作业没有说按钮，但效率会更高。



Asp代码：

 <  ！[CDATA [<％@     Page    语言  =  C＃     AutoEventWireup   =  true    CodeFile   =  Default.aspx.cs   继承  =  _默认   ％ > ]]> 
 
 
 
 <   html     xmlns   =  http://www.w3.org/1999/xhtml >  
  <   head     runat   = 服务器 >  
 <   title  >  < span class =code-keyword><   / title  >  
 <   / head  >  
 <   body  >  
 <  表格    id   =  form1    runat   =  server < span class =code-keyword>>  
 <   div  >  
 
 <   asp：文本框    id   =  txt1    runat   =  server    xmlns：asp   = ＃unknown >  <   / asp：textbox  >  
 <   asp：文本框    id   =  txt2    runat   =  server    xmlns：asp   = ＃unknown >  <   / asp：textbox  >  
 <   asp：textbox     id   =  txt3    runat   =   server    xmlns：asp   = ＃unknown >  <   / asp：textbox  >  
 <   br     /  >  
 <   asp：按钮    id   =  btnCalculate    runat   =  server    onclick   =  btnCalculate_Click    text   = 计算    xmlns：asp   = ＃unknown    /  >  
 <   / div  >  
 
 <   div  >  
 
 <   asp：textbox     id   =  txt4    runat   =  server    ontextchanged   =  TextBox4_TextChanged    xmlns：asp   = ＃unknown >  <   / asp：textbox  >  
 
 <   / div  >  
 <   / form  >  
 <   / body  >  
 <   / html  >  

C＃代码如下：

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.Linq; 
 使用 System.Web; 
 使用 System.Web.UI; 
 使用 System.Web.UI.WebControls; 
 
  public   partial   class  _Default：System.Web.UI.Page 
 {
  protected   void  Page_Load（ object  sender，EventArgs e）
 {
 
} 
 
  protected   void  btnCalculate_Click（ object  sender，EventArgs e）
 {
  double  num1 = Convert.ToDouble（txt1.Text）; 
  double  num2 = Convert.ToDouble（txt2.Text）; 
  double  num3 = Convert.ToDouble（txt3.Text）; 
 
  double  result = num1 + num2 + num3; 
 txt4.Text = result.ToString（）; 
 
} 
} 

有很多方法可以做到这一点。一种简单的方法是使用Decimal.TryParse

十进制总数，temp; 
 
 temp =  0 ; 
 Decimal.TryParse（txt1.Text， out  temp）; 
 
总计+ =临时; 
 
 temp =  0 ; 
 
 Decimal.TryParse（txt2.Text， out  temp）; 
总计+ =临时; 
 
 ... 

i have to sum txt1+txt2+txt3 int txt4.
user may or may not enter values in all the three text boxes.
i have taken below code from code project solved answer,but this is not working.
please help.
.cs code

protected void txtlog_TextChanged(object sender, EventArgs e)
    {
        if ((!string.IsNullOrEmpty(txtlog.Text)) && (!string.IsNullOrEmpty(txtPole.Text)) && (!string.IsNullOrEmpty(txtDangri.Text)))
        {
            txtTotalQty.Text = (Convert.ToInt32(txtlog.Text) + Convert.ToInt32(txtPole.Text) + Convert.ToInt32(txtDangri.Text)).ToString();
        }
    }
    protected void txtPole_TextChanged(object sender, EventArgs e)
    {
        if ((!string.IsNullOrEmpty(txtlog.Text)) && (!string.IsNullOrEmpty(txtPole.Text))&& (!string.IsNullOrEmpty(txtDangri.Text)))
        {
            txtTotalQty.Text = (Convert.ToInt32(txtlog.Text) + Convert.ToInt32(txtPole.Text) + Convert.ToInt32(txtDangri.Text)).ToString();
        }
    }
    protected void txtDangri_TextChanged(object sender, EventArgs e)
    {
        if ((!string.IsNullOrEmpty(txtlog.Text)) && (!string.IsNullOrEmpty(txtPole.Text)) && (!string.IsNullOrEmpty(txtDangri.Text)))
        {
            txtTotalQty.Text = (Convert.ToInt32(txtlog.Text) + Convert.ToInt32(txtPole.Text) + Convert.ToInt32(txtDangri.Text)).ToString();
        }
    }

.aspx code:

<asp:TextBox ID="txtlog" runat="server" Width="150px" 

                                                ontextchanged="txtlog_TextChanged">10
 <asp:RequiredFieldValidator ID="rvlog" runat="server"                    ControlToValidate="txtlog" Display="Dynamic"  SetFocusOnError="True">*

<asp:TextBox ID="txtPole" runat="server" Width="150px" 

 ontextchanged="txtPole_TextChanged">
  <asp:RequiredFieldValidator ID="rvPole" runat="server" 

   ControlToValidate="txtPole" Display="Dynamic" 

    SetFocusOnError="True">*


  <asp:TextBox ID="txtDangri" runat="server" Width="150px" 

  ontextchanged="txtDangri_TextChanged">
   <asp:RequiredFieldValidator ID="rvDangri" runat="server" 

    ControlToValidate="txtDangri" Display="Dynamic" 

    SetFocusOnError="True">*

<asp:TextBox ID="txtTotalQty" runat="server" Width="150px">
 <asp:RequiredFieldValidator ID="rvTotalQty" runat="server" 

  ControlToValidate="txtTotalQty" Display="Dynamic" 

   SetFocusOnError="True">*

解决方案

You need to create a new asp file and add 4 asp text boxes to your project. Name those accordingly.
Then create a button to add sum to the 4th text box. Your assignment doesn't say button but that will be more efficient.

Asp Codes:

<![CDATA[<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>]]>



<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:textbox id="txt1" runat="server" xmlns:asp="#unknown"></asp:textbox>
        <asp:textbox id="txt2" runat="server" xmlns:asp="#unknown"></asp:textbox>
        <asp:textbox id="txt3" runat="server" xmlns:asp="#unknown"></asp:textbox>
        <br />
        <asp:button id="btnCalculate" runat="server" onclick="btnCalculate_Click" text="Calculate" xmlns:asp="#unknown" />
        </div>

        <div>

        <asp:textbox id="txt4" runat="server" ontextchanged="TextBox4_TextChanged" xmlns:asp="#unknown"></asp:textbox>
    
    </div>
    </form>
</body>
</html>

C# Codes like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    
    protected void btnCalculate_Click(object sender, EventArgs e)
    {
        double num1 = Convert.ToDouble(txt1.Text);
        double num2 = Convert.ToDouble(txt2.Text);
        double num3 = Convert.ToDouble(txt3.Text);

        double result = num1 + num2 + num3;
        txt4.Text = result.ToString();

    }
}

There are a myriad of ways to do it. One easy way is to use Decimal.TryParse

Decimal total, temp;

temp = 0;
Decimal.TryParse(txt1.Text, out temp);

total+=temp;

temp=0;

Decimal.TryParse(txt2.Text, out temp);
total+=temp;

...

这篇关于如何在第4个文本框中汇总3个文本框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！