如何在 jquery 的数据表插件中获取列 id 我需要列 id 来更新数据库。
8 回答
fnGetPosition
从特定单元格的 DOM 元素中获取特定单元格的数组索引。最好与 fnGetData() 结合使用。
输入参数:
nNode :要查找其位置的节点。这可能是表格中的“TR”行或“TD”单元格。返回参数取决于此输入。
返回参数:
int 或 array [ int, int, int ] :如果节点是表行 (TR),则返回值将是带有 aoData 对象中行索引的整数。如果节点是表格单元(TD),则返回值将是一个数组,其中包含[ aoData index row, column index (discounting hidden rows), column index (including hidden rows)]。
代码示例:
$(document).ready(function() {
$('#example tbody td').click( function () {
/* Get the position of the current data from the node */
var aPos = oTable.fnGetPosition( this );
/* Get the data array for this row */
var aData = oTable.fnGetData( aPos[0] );
/* Update the data array and return the value */
aData[ aPos[1] ] = 'clicked';
this.innerHTML = 'clicked';
} );
/* Init DataTables */
oTable = $('#example').dataTable();
} );
我认为上面来自 datatables.net 网站的股票答案没有帮助,也没有回答问题。
相信neko_ime是想获取选中项的列对应的列头值(因为这很可能和表中的列名相同,或者用户有表头和数据库表的映射)。
这是获取给定单元格的 sTitle(列名值)的方法
(请注意,我在每一行的第一列都有我的主键,并确保即使使用 ColReorder 的可移动列 iFixedColumns 为 1,以将该键保留在第一列中。我的数据表由 oTable 引用。我假设我有单元格 DOM 引用,我在下面将其称为“目标”):
var value = target.innerHTML;
var ret_arr = oTable.fnGetPosition( target ); // returns array of 3 indexes [ row, col_visible, col_all]
var row = ret_arr[0];
var col = ret_arr[1];
var data_row = oTable.fnGetData(row);
var primary_key = data_row[0];
var oSettings = oTable.fnSettings(); // you can find all sorts of goodies in the Settings
var col_id = oSettings.aoColumns[col].sTitle; //for this code, we just want the sTitle
// you now have enough info to craft your SQL update query. I'm outputting to alert box instead
alert('update where id="'+primary_key+'" set column "'+col_id+'" ('+row+', '+col+') to "'+value+'"');
这是我自己必须弄清楚的事情,因为我使用 JEditable 来允许用户编辑表格中的单元格。
The code snippet above actually helped me solve this issue for my particular situation. Here's my code:
// My DataTable
var oTable;
$(document).ready(function() {
/* You might need to set the sSwfPath! Something like:
* TableToolsInit.sSwfPath = "/media/swf/ZeroClipboard.swf";
*/
TableToolsInit.sSwfPath = "../../Application/JqueryPlugIns/TableTools/swf/ZeroClipboard.swf";
oTable = $('#tblFeatures').dataTable({
// "sDom": '<"H"lfr>t<"F"ip>', // this is the standard setting for use with jQueryUi, no TableTool
// "sDom": '<"H"lfrT>t<"F"ip>', // this adds TableTool in the center of the header
"sDom": '<"H"lfr>t<"F"ip>T', // this adds TableTool after the footer
// "sDom": '<"H"lfrT>t<"F"ip>T', // this adds TableTool in the center of the header and after the footer
"oLanguage": { "sSearch": "Filter this data:" },
"iDisplayLength": 25,
"bJQueryUI": true,
// "sPaginationType": "full_numbers",
"aaSorting": [[0, "asc"]],
"bProcessing": true,
"bStateSave": true, // remembers table state via cookies
"aoColumns": [
/* CustomerId */{"bVisible": false },
/* OrderId */{"bVisible": false },
/* OrderDetailId */{"bVisible": false },
/* StateId */{"bVisible": false },
/* Product */null,
/* Description */null,
/* Rating */null,
/* Price */null
]
});
// uncomment this if you want a fixed header
// don't forget to reference the "FixedHeader.js" file.
// new FixedHeader(oTable);
});
// Add a click handler to the rows - this could be used as a callback
// Most of this section of code is from the DataTables.net site
$('#tblFeatures tr').click(function() {
if ($(this).hasClass('row_selected')) {
$(this).removeClass('row_selected');
}
else {
$(this).addClass('row_selected');
// Call fnGetSelected function to get a list of selected rows
// and pass that array into fnGetIdsOfSelectedRows function.
fnGetIdsOfSelectedRows(fnGetSelected(oTable));
}
});
function fnGetSelected(oTableLocal) {
var aReturn = new Array();
// fnGetNodes is a built in DataTable function
// aTrs == array of table rows
var aTrs = oTableLocal.fnGetNodes();
// put all rows that have a class of 'row_selected' into
// the returned array
for (var i = 0; i < aTrs.length; i++) {
if ($(aTrs[i]).hasClass('row_selected')) {
aReturn.push(aTrs[i]);
}
}
return aReturn;
}
// This code is purposefully verbose.
// This is the section of code that will get the values of
// hidden columns in a datatable
function fnGetIdsOfSelectedRows(oSelectedRows) {
var aRowIndexes = new Array();
var aRowData = new Array();
var aReturn = new Array();
var AllValues;
aRowIndexes = oSelectedRows;
// The first 4 columns in my DataTable are id's and are hidden.
// Column0 = CustomerId
// Column1 = OrderId
// Column2 = OrderDetailId
// Column3 = StateId
// Here I loop through the selected rows and create a
// comma delimited array of id's that I will be sending
// back to the server for processing.
for(var i = 0; i < aRowIndexes.length; i++){
// fnGetData is a built in function of the DataTable
// I'm grabbing the data from rowindex "i"
aRowData = oTable.fnGetData(aRowIndexes[i]);
// I'm just concatenating the values and storing them
// in an array for each selected row.
AllValues = aRowData[0] + ',' + aRowData[1] + ',' + aRowData[2] + ',' + aRowData[3];
alert(AllValues);
aReturn.push(AllValues);
}
return aReturn;
}
这是单击行后如何获取 id 的示例
$('#example tbody tr').live('click', function() {
var row = example .fnGetData(this);
id=row['id'];//or row[0] depend of situation
function(id);
});
如果您需要表中的所有 id,则必须使用如下代码:
$(exampleTable.fnGetNodes()).each(function() {
var aPos = exampleTable.fnGetPosition(this);
var aData = exampleTable.fnGetData(aPos[0]);
aData[aPos[0]] = this.cells[0].innerHTML;
IdSet.push(aData[aPos[0]]);
});
希望有所帮助!
像这样一个简单的问题值得一个很好的简单 jQuery 解决方案。
假设您的 id 在第 0 行,并且您希望在对第 5 行执行操作时访问它,例如
$('td:eq(5)').click(function (){
var id = $(this).parent().find('td:eq(0)').html();
alert('The id is ' + id);
});
请注意,这也适用于过滤器和分页结果。
我同意@fbas 的股票答案并没有真正的帮助。
变量表;
/* Get the rows which are currently selected */ function fnGetSelected(oTableLocal) { var aReturn = new Array(); var aTrs = oTableLocal.fnGetNodes(); for (var i = 0; i < aTrs.length; i++) { if ($(aTrs[i]).hasClass('row_selected')) { aReturn.push(aTrs[i]); } } // console.log( aReturn); return aReturn; } $(function() { ///////////////// //btn_EditCustomer $('#btn_EditCustomer').on('click', function(e) { var anSelected = fnGetSelected(oTable); var rowData = oTable.fnGetData(anSelected[0]); console.log(rowData[0]); }); }); </script>
我的解决方案如下:将主键作为第一列 - 这可以设置为“可见”或不设置。我的编辑和删除链接位于该行的最后一列和最后一列 - 它们分别具有“编辑”和“删除”的 css 类。然后使用 rowCallBack,调用如下函数:
<!-- datatables initialisation -->
"rowCallback": function( row, data ) {
setCrudLinks(row, data);
}
function setCrudLinks(row, data) {
d = $(row).find('a.delete');
d.attr('href', d.attr('href')+'/'+data[0]);
e = $(row).find('a.edit');
e.attr('href', e.attr('href')+'/'+data[0]);
}
setCrudLinks() 只是将主键 (data[0]) 附加到链接 href 的末尾(可能需要的任何内容)。这发生在表格渲染之前,因此也适用于分页。
我有相同的用例,最终将我的代码转变成一个 datatables.net 插件。仓库在这里:DataTables CellEdit Plugin
基本初始化快速简单:
table.MakeCellsEditable({
"onUpdate": myCallbackFunction
});
myCallbackFunction = function (updatedCell, updatedRow) {
var columnIndex = cell.index().column;
var columnHeader = $(table.column(columnIndex).header()).html();
console.log("The header is: " + columnHeader);
console.log("The new value for the cell is: " + updatedCell.data());
}