我正在使用数据表。我想总结一些列,我想在报告的底部显示。我搜索很多东西。然后我在数据表中找到了新的页脚回调函数。我用过它。但我的输出还没有准备好......
我的代码如下,
function Databind(Pdestroy) {debugger;
var destroy = false;
if (Pdestroy == "1")
destroy = true;
var oTable = $('.datatable').dataTable({
"bJQueryUI": true,
'bServerSide': true,
"bDestroy": destroy,
"iDisplayLength": 10,
"sPaginationType": "full_numbers",
'sAjaxSource': '<%= Url.Action("listcount", "Home") %>',
"bFilter": true,
"aoColumnDefs": [{ 'bSortable': false, 'aTargets': [0, 1, 2, 7, 8, 9, 10, 11]}],
"fnRowCallback": function (nRow, aData, iDisplayIndex) {
var oSettings = oTable.fnSettings();
$("td:first", nRow).html(oSettings._iDisplayStart + iDisplayIndex + 1);
return nRow;
},
"footerCallback": function (row, aData, start, end, iDisplayIndex) {
var api = this.api(),
data;
// Remove the formatting to get integer data for summation
var intVal = function (i) {
return typeof i === 'string' ? i.replace(/[\$,]/g, '') * 1 : typeof i === 'number' ? i : 0;
};
// Total over all pages
total = api.column(4)
.data()
.reduce(function (a, b) {
return intVal(a) + intVal(b);
});
// Total over this page
pageTotal = api.column(4, {
page: 'current'
})
.data()
.reduce(function (a, b) {
return intVal(a) + intVal(b);
}, 0);
// Update footer
$(api.column(5).footer()).html(
'$' + pageTotal + ' ( $' + total + ' total)');
}
});
}
此处Row
显示未定义。并且也没有显示错误。但输出没有显示。我附上了输出的截图..
为了获得价值我应该做什么进一步的过程?
答案 0 :(得分:7)
使用sum plugin而不是重新发明轮子:)
jQuery.fn.dataTable.Api.register( 'sum()', function ( ) {
return this.flatten().reduce( function ( a, b ) {
if ( typeof a === 'string' ) {
a = a.replace(/[^\d.-]/g, '') * 1;
}
if ( typeof b === 'string' ) {
b = b.replace(/[^\d.-]/g, '') * 1;
}
return a + b;
}, 0 );
} );
因为您只想在每次重绘表时更新某个页脚列,所以只需要一个简单的drawCallback
:
drawCallback: function() {
var api = this.api();
// Total over all pages
var total = api.column(4).data().sum();
// Total over this page
var pageTotal = api.column(4, {page:'current'}).data().sum();
$(api.column(5).footer()).html('$' + pageTotal + ' ( $' + total + ' total)');
}
答案 1 :(得分:3)
@davidkonrad的回答比我好。我建议使用他的答案而不是我的答案。
此代码可用于自定义操作,例如添加css等。
tfoot
。fnFooterCallback
。如何使用
"fnFooterCallback": function(nRow, aaData, iStart, iEnd, aiDisplay) {
//when working with pagination if you want to sum all records present in the current visible page only then use below if block
var iDisplayLength = parseInt(iEnd) - parseInt(iStart);
if (iStart != 0) {
iStart = iStart - iDisplayLength;
iEnd = aaData.length;
}
//columns start from 0, i took 1st column so the line --> aaData[aiDisplay[i]][1]
var iTarget = 0;
for (var i = iStart; i < iEnd; i++) {
iTarget += aaData[aiDisplay[i]][1] * 1; // because you get string in aaData[aiDisplay[i]][1] so multiplying with 1 gives number
}
// Modifying the footer row
var nCells = nRow.getElementsByTagName('th');
nCells[1].innerHTML = parseInt(iTarget);
}
&#13;