DataTable用C＃排序？

Question

我想按DataTable的一列对DataTable进行排序，例如Name。虽然我想定义自己的排序方式，例如按文件的扩展名排序，但该如何实现呢？

Answer 1

The easiest and most extendable way is to use Linq-To-DataSet and Path.GetExtension :

var orderedRows = dataTable.AsEnumerable()
    .Select(row => new { // create an anoymous type for readability
        row, 
        extension = Path.GetExtension(row.Field<string>("Filename"))  
    })
    .OrderBy(x => x.extension)
    .Select(x => x.row);

If you need a new DataTable from the query (you could simply loop it with foreach ) use:

dataTable = orderedRows.CopyToDataTable();

Answer 2

DataTable result = dt.AsEnumerable()
                     .OrderBy(d=>d.Field<string>("YourFieldName"))
                     .CopyToDataTable();

Answer 3

最简单的方法：添加一个隐藏的DataColumn，将在其中存储文件扩展名，并照常对该DataColumn排序DataTable。