javascript 数据表列数
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datatables number of columns
提问by Astronaut
How do i get the number of columns in a datatable?
如何获取数据表中的列数？
I can get the number of rows by doing oTable.fnGetData().length but how do I get the number of columns so I can Iterate over each cell like this:
我可以通过执行 oTable.fnGetData().length 来获取行数，但是如何获取列数以便我可以像这样迭代每个单元格：
var numColumns = //How to get the number of columns?
for(var r=0;r<oTable.fnGetData().length;r++){
for(var c=0;c <= numColumns;c++){
console.log("[R]: "+r+ "[C]: "+c+ " data: "+oTable.fnGetData(r,c));
}
}
采纳答案by c0deNinja
The fnGetData can be used to get a single data row. So, you can simply check the length of the data row for the number of columns.
fnGetData 可用于获取单个数据行。因此，您可以简单地检查数据行的长度以获取列数。
Example:
例子：
oTable.fnGetData(someRowNumber).length;
The above will return the number of columns in that data row.
以上将返回该数据行中的列数。
回答by Gyrocode.com
GET NUMBER OF COLUMNS
获取列数
DataTables 1.9+
// Get number of all columns var numCols = $('#example').dataTable().fnSettings().aoColumns.length; // Get number of visible columns var numCols = $('#example thead th').length;See this jsFiddlefor demonstration.
DataTables 1.10+
// Get number of all columns var numCols = $('#example').DataTable().columns().nodes().length; // Get number of visible columns var numCols = $('#example').DataTable().columns(':visible').nodes().length; // Get number of visible columns (alternative way) var numCols = $('#example thead th').length;See this jsFiddlefor demonstration.
数据表 1.9+
// Get number of all columns var numCols = $('#example').dataTable().fnSettings().aoColumns.length; // Get number of visible columns var numCols = $('#example thead th').length;请参阅此 jsFiddle进行演示。
数据表 1.10+
// Get number of all columns var numCols = $('#example').DataTable().columns().nodes().length; // Get number of visible columns var numCols = $('#example').DataTable().columns(':visible').nodes().length; // Get number of visible columns (alternative way) var numCols = $('#example thead th').length;请参阅此 jsFiddle进行演示。
ITERATE OVER EACH CELL
迭代每个单元格
DataTables 1.10.6+
$('#example').DataTable().cells().every( function (rowIndex, colIndex) { var data = this.data(); console.log("Row:", rowIndex, "Col:", colIndex, "Data:", data); });
数据表 1.10.6+
$('#example').DataTable().cells().every( function (rowIndex, colIndex) { var data = this.data(); console.log("Row:", rowIndex, "Col:", colIndex, "Data:", data); });
