I want to know how to transform a DataTable into a Dictionary. I did something like this.
using System.Linq;
internal Dictionary<string,object> GetDict(DataTable dt)
{
return dt.AsEnumerable()
.ToDictionary<string, object>(row => row.Field<string>(0),
row => row.Field<object>(1));
}
But I get:
System.Data.EnumerableRowCollection does not contains a definition for 'ToDictionary' and the best extension method overload 'System.Linq.Parallel.Enumerable.ToDictionary(System.Linq.ParallelQuery, System.Func, System.Collections.Generic.IEqualityComrparer)' has some invalid argumentsch
How can I resolve this?
Thanks
The generic method ToDictionary
has 3 parameters. You left one off, so it doesn't know what to do. If you want to specify all of the parameters, it would be <DataRow, string, object>
.
internal Dictionary<string,object> GetDict(DataTable dt)
{
return dt.AsEnumerable()
.ToDictionary<DataRow, string, object>(row => row.Field<string>(0),
row => row.Field<object>(1));
}
Of course, if you leave them off, the compiler is able to infer the types, so you don't get the error.