电子邮件ID验证 [英] validation for Email Ids

问题描述

嗨


我有两个文本框用于发送电子邮件ID

当我给出的价值如



in First Email：[e-mail]

in Second Email：[e-mail]





它应该比较两个值并且应该显示验证两个电子邮件ID不应该相同



我怎样才能实现这个目标？

解决方案

使用comparevalidator并将运算符属性设置为 notequal

< ; asp：textbox id =   TextBox1 runat =    server >  < /   asp：textbox  >  
< asp：textbox id =   TextBox2 runat =   server textmode =  密码 >  < /   asp：textbox  >  
< asp：comparevalidator id =   CompareValidator1 controltocompare =   TextBox1 controltovalidate =   TextBox2  Operator =   NotEqual  runat =  服务器 
 ErrorMessage =   CompareValidator >  &l t; /   asp：comparevalidator  >  

 <   script    类型  =  text / javascript    language   =   JavaScript >  
 <！ -     
 // -------------- ------------------ 
 //此代码比较表单中的两个字段并提交
 //如果它们相同或不相同如果他们不同
 // -------------------------------- 
 function checkEmail（theForm）{
 if（theForm.EMAIL_1.value == theForm.EMAIL_2.value）
 {
 alert（'两封电子邮件相同，请输入另一个电子邮件地址！'）; 
返回false; 
}其他{
返回true; 
} 
} 
 //    - >   
 <   / script  >  
 
 
 
 
 <  表格    action   =  ../\"   onsubmit   =  return checkEmail（this）; >  
 <   p  > 输入您的电子邮件地址：<   br  >  
 <   input     type   =  TEXT    name   =  EMAIL_1    size   =  20    maxlength   =  20 >  
 <   br  >  
请确认您的电子邮件地址：
 < ;   br  >  
 <   input    类型  =  TEXT   名称  =  EMAIL_2    size   =  20    maxlength   =   20 >  
  <   br  >  
 <   input     t ype   = 提交    value   = 发送地址！ >  <   / p  >  
 <   / form  >  

解决方案

很容易。通过使用 JavaScript 转换为小写进行比较。

  function  validateEmails（） {
  var  firstEmail =  document  .getElementById（ '  txtFirstEmail'）; 
  var  secondEmail =  document  .getElementById（'   txtSecondEmail'）; 
 
  if （firstEmail！=  null && secondEmail！= < span class =code-keyword> null ）{
  if （firstEmail.value.toLowerCase（）== secondEmail.value.toLowerCase （））{
 alert（ 两个电子邮件ID不应相同。）; 
  return   false ; 
} 
} 
 
 返回  true ; 
} 

注意：它不会验证是否为空白。如果你想这样做，那么请自己添加这些代码。我刚刚给出了根据您的要求验证价值的代码。

演示

[演示]忽略案例的电子邮件验证 [ ^ ]

Hi
I have two text boxes for email ids
when I give values like

in First Email : [e-mail]
in Second Email : [e-mail]


It should compare both values and should display validation "both email ids should not be same"

How can I achieve this?

解决方案

use comparevalidator and set the operator property as notequal

<asp:textbox id="TextBox1" runat="server"></asp:textbox>
<asp:textbox id="TextBox2" runat="server" textmode="Password" ></asp:textbox>
<asp:comparevalidator id="CompareValidator1" controltocompare="TextBox1" controltovalidate="TextBox2"  Operator="NotEqual" runat="server" 
                                ErrorMessage="CompareValidator"></asp:comparevalidator>

<script type="text/javascript" language="JavaScript">
<!--
//--------------------------------
// This code compares two fields in a form and submit it
// if they're the same, or not if they're different.
//--------------------------------
function checkEmail(theForm) {
    if (theForm.EMAIL_1.value == theForm.EMAIL_2.value)
    {
        alert('Both Emails are same,please enter another Email address!');
        return false;
    } else {
        return true;
    }
}
//-->
</script>




<form action="../" onsubmit="return checkEmail(this);">
<p> Enter Your Email Address:<br>
<input type="TEXT" name="EMAIL_1" size="20" maxlength="20">
<br>
Please Confirm Your Email Address:
<br>
<input type="TEXT" name="EMAIL_2" size="20" maxlength="20">
<br>
<input type="SUBMIT" value="Send Address!"></p>
</form>

Solution

Very easy. Compare by converting to lower case using JavaScript.

function validateEmails() {
    var firstEmail = document.getElementById('txtFirstEmail');
    var secondEmail = document.getElementById('txtSecondEmail');

    if (firstEmail != null && secondEmail != null) {
        if (firstEmail.value.toLowerCase() == secondEmail.value.toLowerCase()) {
        alert("Both email ids should not be same.");
            return false;
        }
    }

    return true;
}

Note: It does not validate for blank. If you want to do that, then please add those code yourself. I have just given the code for validating the value according to your requirements.

Demo

[Demo] Email Validation ignoring the case[^]

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