如果金额验证的条件，javascript中的问题。 [英] Problem in javascript if condition of amount validation .

问题描述

我有以下javascript代码

，当我检查值

I have following javascript code
when i check the value

if (amountValue >= memberDueValue)

它转到其他条件但是如果条件值应该是

it goes to else condition but should be in if condition the values are

amountValue 

=

220000 

memberDueValue

=

50023.14

如果

if

amountValue 

>

memberDueValue

且

amountValue 

的第一个值是小于

memberDueValue

的第一个值。

它总是转到其他地方。



我的尝试：

.
it always goes to else.

What I have tried:

var memberDue = document.getElementById("lblTotalDueAmount_" + typeId + "_" + memberId).value;
   var savingBalance = document.getElementById("lblMemberSavingAmount_" + typeId + "_" + memberId).value
   var amount = document.getElementById("lblMemberTotal_" + typeId + "_" + memberId).value;

   var memberDueValue = parseFloat(memberDue).toFixed(2);
   var savingBalanceValue = parseFloat(savingBalance).toFixed(2);
   var amountValue = parseFloat(amount).toFixed(2);

   alert(amountValue + ", " + memberDueValue + ", " + (memberDueValue - amountValue).toFixed(2));

   if (amountValue >= memberDueValue) {
       document.getElementById("lblMemberDepositAmount_" + typeId + "_" + memberId).value = (amountValue - memberDueValue).toFixed(2);
   }
   else {
       var diff = (memberDueValue - amountValue).toFixed(2);
       if (diff > savingBalanceValue) {
           document.getElementById("lblMemberWithdrawlAmount_" + typeId + "_" + memberId).value = savingBalanceValue;
       }
       else {
           document.getElementById("lblMemberWithdrawlAmount_" + typeId + "_" + memberId).value = (memberDueValue - amountValue).toFixed(2);
       }
   }

推荐答案

您好：

我认为问题在于：

Hello:
I think that the problem is in the lines:

var savingBalanceValue = parseFloat(savingBalance).toFixed(2);
var amountValue = parseFloat(amount).toFixed(2);

如果它们是：

if they will be:

var savingBalanceValue = parseFloat(savingBalance);
var amountValue = parseFloat(amount);

逻辑将正常工作。





当你使用

the logic will work correctly.


When you use

.toFixed(2)

时，结果是：

the result of the asigment is that:

savingBalanceValue="220000";<br />
amountValue="50023.14"

因为 .toFixed 将结果转换为字符串，然后if中的比较不是数字之间的比较，而是字符串之间的比较然后

because .toFixed converts the result to string and then the comparation in the if is not a comparation between numbers but a comparation betwen strings and then

if (amountValue >= memberDueValue)

是

is

if ("220000" >= "50023.14")

转到其他条件。

that goes to the else condicion.

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