Question

这是我的页面“交换转换器” 当我想改变我从销售到购买的路线然后点击按钮买入或卖出时，变化率但是输出但结果不变的字段

<html>

<head>
    <title></title>
    <script src="//cdn.jsdelivr.net/jquery/2.1.1/jquery.min.js"></script>
</head>

<body>

    <script>
        function fn_cross(c) {
            switch (c) {}
        }

        $(document).ready(function() {
            buyCours();
        });

        function changeCourse(buttonValue) {
            if (buttonValue == ("buyUAH")) {
                buyCours();
            } else {
                sellCours();
            }
        }

        function buyCours() {
            var myData = {
                "operation": "changeCourse",
                "exchangeCall": "buy"
            };
            $.ajax({
                type: "GET",
                url: "/ConventerServlet",
                data: {
                    jsonData: JSON.stringify(myData)
                },
                dataType: "json",

                //if received a response from the server
                success: function(data) {
                    document.getElementById('exchangeUSD').value = data.exchangeUSD;
                    document.getElementById('exchangeRUB').value = data.exchangeRUB;
                    document.getElementById('exchangeEUR').value = data.exchangeEUR;
                }
            });
            count($("#inputValue").val())
        }

        function sellCours() {
            var myData = {
                "operation": "changeCourse",
                "exchangeCall": "sell"
            };
            $.ajax({
                type: "GET",
                url: "/ConventerServlet",
                data: {
                    jsonData: JSON.stringify(myData)
                },
                dataType: "json",

                //if received a response from the server
                success: function(data) {

                    document.getElementById('exchangeUSD').value = data.exchangeUSD;
                    document.getElementById('exchangeRUB').value = data.exchangeRUB;
                    document.getElementById('exchangeEUR').value = data.exchangeEUR
                }
            });
            count($("#inputValue").val())
        }

        function isNumberKey(evt) {
            var charCode = (evt.which) ? evt.which : event.keyCode
            if (charCode > 31 && (charCode != 46 && charCode != 44 && (charCode < 48 || charCode > 57)))
                return false;
            return true;
        }

        function count(inputValue) {

            console.log(inputValue);
            if (inputValue != "") {
                document.getElementById("conventUSD").value = ($("#exchangeUSD").val() * inputValue);
                document.getElementById("conventEUR").value = ($("#exchangeEUR").val() * inputValue);
                document.getElementById("conventRUB").value = ($("#exchangeRUB").val() * inputValue);
            } else {
                var defaultValue = "0.00";
                document.getElementById("conventUSD").value = defaultValue;
                document.getElementById("conventEUR").value = defaultValue;
                document.getElementById("conventRUB").value = defaultValue;
            }
        }
    </script>
    <div class="USD">
        <h2 style="text-align: center">UAH</h2> I want
        <input type="button" id="buyUAH" onclick="changeCourse(this.id)" value="Buy">

        <input type="button" id="sellUAH" onclick="changeCourse(this.id)" value="Sell">


        <label for="inputValue"></label>
        <input type="text" value="0.00" onkeypress="return isNumberKey(event)" onkeyup="count(this.value)" onfocus="if (this.value == '0.00') this.value='';" onblur="if (this.value == '') {this.value = '0.00'; }" id="inputValue" style="width: 100px;margin-bottom: 30px">
        <select id="fn_c1" onchange="fn_cross(this.value)">
            <option selected="" value="840">USD</option>
            <option value="978">EUR</option>
            <option value="643">RUB</option>
            <option value="1">UAH</option>
        </select>
        <br/>Result
        <br/>
        <li>
            <input type="text" readonly value="0.00" onblur="if (this.value == '') {this.value = '0.00'; }" id="conventUSD"> USD
            <input style="width: 50px" readonly id="exchangeUSD">
        </li>
        <li>
            <input type="text" readonly value="0.00" onblur="if (this.value == '') {this.value = '0.00'; }" id="conventRUB"> RUB
            <input style="width: 50px" readonly id="exchangeRUB">
        </li>
        <li>
            <input type="text" readonly value="0.00" onblur="if (this.value == '') {this.value = '0.00'; }" id="conventEUR"> EUR
            <input style="width: 50px" readonly id="exchangeEUR">
        </li>

    </div>
</body>

</html>

请帮助我解决这个问题，告诉我哪里有错误以及如何修复它！

Answer 1

我想这个问题出在你的ajax请求中。

在这个fiddle中，我刚用硬编码的值取代了你的ajax调用，一切正常：

// idx definition
var idx = 0;
...
document.getElementById('exchangeUSD').value = 444 + idx;
document.getElementById('exchangeRUB').value = 444 + idx;
document.getElementById('exchangeEUR').value = 444 + idx;
idx++;

我希望这会有所帮助=）

为什么我的值在第二次点击后更新

1 个答案: