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Filter DataTable

Posted By:Syed Shakeer Hussain       Posted Date: July 29, 2012    Points: 40    Category: ADO.NET    URL: http://www.dotnetspark.com  

There are many ways to filter DataTable.

1.) You can use the DataTable.Select method. However, the results are an array of DataRow which is not bindable.
2.) You can use a DataView which is efficient for sorting, filtering. All DataTables have a default DataView -- DataTable.DefaultView
3.) Or you can use LINQ.

DataView dv = new DataView(tableOne, "OrderID <> 'XXXX'", "OrderTime desc", DataViewRowState.CurrentRows);

Or transform the DataView back to a DataTable
DataTable newTable = new DataView(tableOne, "OrderID <> 'XXXX'",
                "OrderTime desc", DataViewRowState.CurrentRows).ToTable();
Or you can use LINQ
IEnumerable<DataRow> ordered = tableOne.AsEnumerable()
                .Where(i => i.Field<String>("OrderID ") != 'XXXX')               
                .OrderByDescending(i => i.Field<DateTime>("OrderTime "));

Or use LINQ to transform it to a DataTable
DataTable newTable = tableOne.AsEnumerable()
                 .Where(i => i.Field<String>("OrderID ") != 'XXXX')                 
                .OrderByDescending(i => i.Field<DateTime>("OrderTime "))


Further Readings:


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