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動態添加或刪除表中的行使用jQuery，但如何在刪除行後保留數據中的數據，並且在刪除前一行後添加新行時沒有獲得totalSum .row添加成功地並獲得初始金額，但aftre刪除操作，我得到NAN總和使用jQuery動態地添加或刪除表中的行使用jQuery
<html>
<head>
<meta name="viewport" content="width=device-width" />
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery-1.10.2.js"></script>
<script>
function validation() {
if (document.getElementById(txt_item).value == "")
alert("Please Enter a Item name");
return false;
if (document.getElementById(txt_price).value == "")
alert("Please Enter Price");
return false;
if (document.getElementById(txt_quantity).value == "")
alert("Please Enter Quantity");
return false;
}
</script>
<script>
var itemCount = 0;
$(document).ready(function() {
var array = [];
$("#txt_item").focus();
$("#txt_quantity").keydown(function (e) {
var code = e.keyCode || e.which
if (code === 9) {
var table = "";
var arr = {
"Row_ID": itemCount,
"TXT_ITEM": $("#txt_item").val(),
"TXT_PRICE": $("#txt_price").val(),
"TXT_QUANTITY": $("#txt_quantity").val(),
"TOTAL_AMOUNT": $("#txt_price").val() * $("#txt_quantity").val()
}
array.push(arr);
itemCount++;
table = "<tr id='" + itemCount + "'><td>" + arr['TXT_ITEM'] + "</td><td id='price_"+itemCount+"'>" + arr['TXT_PRICE'] + "</td><td><input type='text' id='quantity_"+itemCount+"' value='" + arr['TXT_QUANTITY'] + "'></td><td id='" + itemCount + "_total'>" + parseInt(arr['TXT_PRICE']) * parseInt(arr['TXT_QUANTITY']) + "</td><td><input type='button' id='" + itemCount + "' class='btn' value='Remove'></td></tr>";
$("#test1").append(table);
totalSum();
$(".btn").click(function() {
var buttonId = $(this).attr("id");
//var value_quantity = $(this).val();
//buttonId = buttonId.replace("tr", "").trim();
//var value_price = $("#price_" + buttonId).text();
//var value_total_price = parseInt($("#"+buttonId+"_total").text());
//var tamount=parseInt($("#total_amount").text());
//$("#total_amount").text(tamount - value_total_price);
////alert(tamount);
//alert(value_total_price);
$("#" + buttonId).remove();
array.splice(buttonId - 1, 1);
//itemCount--;
totalSum();
Array_IDs();
itemCount = array.length + 1;
});
$("#quantity_" + itemCount).keydown(function (e) {
var code = e.keyCode || e.which
if (code === 9)
var value_quantity = $(this).val();
var rowId = $(this).closest('tr').attr('id');
rowId = rowId.replace("tr", "").trim();
var value_price = $("#price_" + rowId).text();
if (value_quantity >= 0)
{
$("#" + rowId+"_total").text(value_price * value_quantity);
totalSum();
}
});
$("#txt_item").val("");
$("#txt_price").val("");
$("#txt_quantity").val("");
}
function totalSum() {
var total = 0;
var rows = array.length;
for (var i = 1; i <= rows; i++) {
total += parseInt($("#" + i + "_total").text());
//total += parseInt(array[i].TXT_PRICE * array[i].TXT_QUANTITY);
}
$("#total_amount").text(total);
//alert(total);
}
function Array_IDs()
{
for (var i = 0; i < array.length; i++) {
array[i].Row_ID = i + 1;
//alert(i);
}
//$("#test1 tr").remove();
}
});
});
</script>
</head>
<body>
<table id="test1">
<tr>
<td>Item Name</td>
<td>Price</td>
<td>Quantity</td>
<td>Total Amount</td>
<td>Action</td>
</tr>
<tfoot>
<tr>
<td><input type="text" id="txt_item" /></td>
<td><input type="text" id="txt_price" /></td>
<td><input type="text" id="txt_quantity" /></td>
<td id="total_price" align="center"></td>
</tr>
<tr>
<td></td>
<td>@*<input type="button" id="add_button" value="Add Row" />*@</td>
<td align="right">Total Amount:</td>
<td id="total_amount" align="center"></td>
</tr>
</tfoot>`enter code here`
</table>
<table id="test2" width="50%"></table>
</body>
</html>