使用Jquery each()循环通过输入字段进行验证

时间:2011-01-21 11:27:18

标签: jquery validation forms input each

我正在创建一个表单,并且只有在输入值是数字时才希望代码执行。我试图避免使用某种验证插件,并想知道是否有办法循环输入字段并检查值。

我一直在尝试以下方法,但我认为我的逻辑是错误的:

(#dailyincome是表单ID)

$("#submit").click(function() {

  $("#monthlyincome input").each(function() {

       if (!isNaN(this.value)) {
       // process stuff here

       }

   });

});

有什么想法吗?

这是整个更新的代码:

$("#submit").click(function() {

    $("#monthlyincome input[type=text]").each(function() {
        if (!isNaN(this.value)) {
            // processing data      
            var age         = parseInt($("#age").val());
            var startingage = parseInt($("#startingage").val());

            if (startingage - age > 0) { 

                $("#field1").val(startingage - age);
                $("#field3").val($("#field1").val());

                var inflationyrs    = parseInt($("#field3").val());
                var inflationprc    = $("#field4").val() / 100;
                var inflationfactor = Math.pow(1 + inflationprc, inflationyrs);
                $("#field5").val(inflationfactor.toFixed(2)); 

                var estyearlyinc    = $("#field6").val();
                var inflatedyearlyinc = inflationfactor * estyearlyinc;
                $("#field7").val(FormatNumberBy3(inflatedyearlyinc.toFixed(0), ",", "."));

                var estincyears = $("#field2").val();
                var esttotalinc = estincyears * inflatedyearlyinc;
                $("#field8").val(FormatNumberBy3(esttotalinc.toFixed(0), ",", "."));

                var investmentrate   = $("#field9").val() / 100;
                var investmentfactor = Math.pow(1 + investmentrate, inflationyrs);
                $("#field10").val(investmentfactor.toFixed(2));

                var currentsavings = $("#field11").val();
                var futuresavings  = currentsavings * investmentfactor;
                $("#field12").val(FormatNumberBy3(futuresavings.toFixed(0), ",", "."));

                //final calculations
                var futurevalue = (1 * (Math.pow(1 + investmentrate, inflationyrs) - 1) / investmentrate);
                var finalvalue = (1 / futurevalue * (esttotalinc - futuresavings));

                $("#field13").val(FormatNumberBy3(finalvalue.toFixed(0), ",", "."));

            }
            // end processing
        }
    });

});

FormatNumberBy3是用于格式化数字的函数。 :)

3 个答案:

答案 0 :(得分:37)

在这里测试这很好用:

$(function() {
    $("#submit").click(function() {
        $("#myForm input[type=text]").each(function() {
            if(!isNaN(this.value)) {
                alert(this.value + " is a valid number");
            }
        });
        return false;
    });
});

在表格上看起来像这样:

<form method="post" action="" id="myForm">
    <input type="text" value="1234" />
    <input type="text" value="1234fd" />
    <input type="text" value="1234as" />
    <input type="text" value="1234gf" />
    <input type="submit" value="Send" id="submit" />
</form>

根据需要移动返回false

编辑:指向sdded到OPs表单的代码的链接 http://pastebin.com/UajaEc2e

答案 1 :(得分:1)

value是一个字符串。您需要先尝试将其转换为数字。在这种情况下,一个简单的单一+将起到作用:

if (!isNaN(+this.value)) {
  // process stuff here
}

答案 2 :(得分:0)

基于上面的Sondre(谢谢!Sondre)示例,我在Fiddle中开发了一个示例,以便人们可以更好地理解实现

示例:Click Here

$("#submit").on("click", function() {
  var isValid = [];
  var chkForInvalidAmount = [];
  $('.partialProdAmt').each(function() {
    if ($.trim($(this).val()) <= 0) {
      isValid.push("false");
    } else {
      isValid.push("true");
    }
    if ($.isNumeric($(this).val()) === true) {
      chkForInvalidAmount.push("true");
    } else {
      chkForInvalidAmount.push("false");
    }
  });
  if ($.inArray("true", isValid) > -1) {
    if ($.inArray("false", chkForInvalidAmount) > -1) {
      $(".msg").html("Please enter Correct format ");
      return false;
    } else {
      $(".msg").html("All Looks good");
    }
  } else {
    $(".msg").html("Atlest One Amount is required in any field ");
    return false;
  }

});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<form method="post" action="" id="myForm">
  <input type="text" class="partialProdAmt" value="0" />
  <input type="text" class="partialProdAmt" value="0" />
  <input type="text" class="partialProdAmt" value="0" />
  <input type="text" class="partialProdAmt" value="0" />
  <input type="button" value="Send" id="submit" />
</form>
<div class="msg"></div>