Question

I am completely new to LINQ in C#/.NET. I understand that I could use it to convert a DataSet into an Array/List, am I able to go in the opposite direction?

I’m using NPlot to generate a graph of captured prices, which are stored in a List, where PriceInformation is a class containing two public doubles and a DateTime.

Any suggestions very welcome.

Answer 1

There’s a method called CopyToDataTable. That method will only help if you already have a IEnumerable(DataRow)

Here’s how I’d do this:

//extension method to convert my type to an object array. public static object[] ToObjectArray(this MyClass theSource) {   object[] result = new object[3];   result[0] = theSource.FirstDouble;   result[1] = theSource.SecondDouble;   result[2] = theSource.TheDateTime;    return result; }   //some time later, new up a dataTable, set it's columns, and then...  DataTable myTable = new DataTable()  DataColumn column1 = new DataColumn(); column1.DataType = GetType('System.Double'); column1.ColumnName = 'FirstDouble'; myTable.Add(column1);  DataColumn column2 = new DataColumn(); column2.DataType = GetType('System.Double'); column2.ColumnName = 'SecondDouble'; myTable.Add(column2);  DataColumn column3 = new DataColumn(); column3.DataType = GetType('System.DateTime'); column3.ColumnName = 'TheDateTime'; myTable.Add(column3);  // ... Each Element becomes an array, and then a row MyClassList.ForEach(x => myTable.Rows.Add(x.ToObjectArray());