具有相同名称的多个下拉列表以进行验证。 [英] Multiple dropdownlists with same name to validate.

问题描述

请帮帮我们，



我页面上有一个按钮，每次我们点击都会将下拉列表项添加到页面上。



因此，如果我单击按钮3次，那么我将在页面上有3个下拉列表项。 />


现在问题是我要验证它们，



我正在使用它..

Hi,

Please need help guys,

I have a button on the page , each time we click that adds dropdownlist items on to the page.

So if i click the button 3 times so i will have 3 dropdownlist items on the page.

Now the problem is i wants to validate them,

I am using this..

var extrapetid = document.getElementsByTagName('select');
       for (i = 0; i < extrapetid.length; i++) {

           var value = $("extrapetid[i] option:selected").val();
           if (extrapetid[i].val() == "") {
               valid = false;
            }
         }

我想检查选择的值是否为 valid = false。

我用它来迭代页面上的每个选择项并获得它的选定值但是



但是没有好运，我总是得到错误或没有得到价值。



请帮帮我

I wants to check if the seleted value is "" make it valid=false.
I am using it to iterate each select item on the page and get the selected value of it but

But no luck in that i always getting error or not getting the value.

Please help me

推荐答案

（ extrapetid [i]选项：选择）。val（）;
if （extrapetid [i] .val（）== ）{
valid = false ;
}
}

("extrapetid[i] option:selected").val(); if (extrapetid[i].val() == "") { valid = false; } }

我想检查选择的值是否为 valid = false。

我用它来迭代页面上的每个选择项并获得它的选定值但是



但是没有幸运的是，我总是得到错误或没有得到价值。



请帮助我

I wants to check if the seleted value is "" make it valid=false.
I am using it to iterate each select item on the page and get the selected value of it but

But no luck in that i always getting error or not getting the value.

Please help me

jQuery无法将此解析为知道需要对extrapetid [i]进行评估。相反，为每个控件的名称添加一个索引，如control1，control2，然后使用extrapetid [i]访问该对象，并获取它的唯一ID并将其传递给jquery照常。拥有大量具有相同ID的控件并不是一个好主意。你怎么分辨他们？

jQuery can't parse this to know that extrapetid[i] needs to be evaluated. Instead, add an index to the name for each control, like control1, control2, then use extrapetid[i] to access the object, and get it's unique id and pass that to jquery as normal. Having lots of controls with the same id is not a good idea. How do you tell them apart ?

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