Question

我正在为我的daliy销售编写报告。当我尝试计算最终总输出显示为undefined时我使用未定义的警报消息输出显示检查了总数我不知道那是什么错误。我到目前为止尝试过的内容附在下面

var total = 0;
function get_all() {
    var from_date = $('#from_date').val();
    var to_date   = $('#to_date').val();

    $('#tbl-projects').dataTable().fnDestroy();

    $.ajax({
        url      : "../php/report/all_sales.php",
        type     : "POST",
        dataType : 'JSON',
        data     : { from_date : from_date, to_date : to_date },
        async    : false,
        success  : function (data) {         
            $('#tbl-projects').dataTable({
                dom         : 'Bfrtip',
                buttons     : [
                    'excel', 'pdf', 'print'
                ],
                "aaData"    : data,
                "scrollX"   : true,
                "aoColumns" : [
                    {"sTitle": "Invoice No", "mData": "id"},
                    {"sTitle": "Date",       "mData": "date"},
                    {"sTitle": "Total",      "mData": "total"},
                    {"sTitle": "Pay",        "mData": "pay"},
                    {"sTitle": "Due",        "mData": "due"},
                ]
            });

            total += Number(total);
            alert(total);
        },
        error    : function (xhr) {
            console.log('Request Status: ' + xhr.status  );
            console.log('Status Text: ' + xhr.statusText );
            console.log(xhr.responseText);
            var text = $($.parseHTML(xhr.responseText)).filter('.trace-message').text();
            console.log(text)
        }
    });
}

Answer 1

Total变量是在函数外部定义的，而不是在函数内部定义total或只是将其设为全局变量。

求和线total += Number(total);必须在循环内从total中提取data ajax response。

因此您的功能可以如下所示：

       function get_all() {
            var total=0;//local varialble
            var from_date = $('#from_date').val();
            var to_date = $('#to_date').val();
            $('#tbl-projects').dataTable().fnDestroy();

            $.ajax({
                url:"../php/report/all_sales.php",

                type: "POST",
                dataType: 'JSON',
                data:{from_date:from_date, to_date:to_date},
                async:false,
                success: function (data) {

                    $('#tbl-projects').dataTable({
                        dom: 'Bfrtip',
                        buttons: [
                            , 'excel', 'pdf', 'print'
                        ],

                        "aaData": data
                        ,
                        "scrollX": true,
                        "aoColumns": [
                            {"sTitle": "Invoice No", "mData": "id"},
                            {"sTitle": "Date", "mData": "date"},
                            {"sTitle": "Total", "mData": "total"},
                            {"sTitle": "Pay", "mData": "pay"},
                            {"sTitle": "Due", "mData": "due"},

                        ]


                    });

                   data.forEach(function(recordInLoop) {
                        total += Number(recordInLoop.total);
                   });

                },
                error: function (xhr) {
                    console.log('Request Status: ' + xhr.status  );
                    console.log('Status Text: ' + xhr.statusText );
                    console.log(xhr.responseText);
                    var text = $($.parseHTML(xhr.responseText)).filter('.trace-message').text();
                    console.log(text)
                }
            });


        }

如何计算数据表最终总金额

1 个答案: