Question

I got this:

var dsetValueFields = rds.Result.Columns.Cast<DataColumn>().Where(c=>c.DataType==typeof(Decimal));

And need to convert into a DataTable. Tried this:

DataTable dt = new DataTable();
dt.Columns.AddRange(dsetValueFields.ToArray());

But get error, “Column is part of another table.”

Thanks!

Answer 1

You’ll need to create copies of the columns in your enumerable. Like DataRows, DataColumns can only be attached to one table.

dt.Columns.AddRange(dsetValueFields
                   .Select(c => new DataColumn(c.Name, c.DataType))
                   .ToArray());