How to populate DataTable with anonymous LINQ result

Question

I have the following LINQ query:

var timesheets = from timesheet in entities.Timesheets
    join timesheetTask in entities.Timesheet_Task on timesheet.Id e         


        

Answer 1

If you really want to populate DataTable:

// your query
var timesheets = ...

// design table first
DataTable table = new DataTable();
table.Columns.Add(new DataColumn
    {
        ColumnName = "TaskName",
        DataType = typeof(String);
    });
...

List list = new List();
foreach (var t in timesheets)
{
    var row = table.NewRow();
    row.SetField("TaskName", t.taskName); // extension method from System.Data.DataSetExtensions.dll
    ...

    list.Add(row);
}

DataTable table = list.CopyToDataTable(); // extension method too

---

Or more LINQ way:

timesheets
    .Select(t =>
        {
            var row = table.NewRow();
            ...
            return row;
        })
    .CopyToDataTable();

---

Or in same query syntax. Implement a method:

static DataRow NewRow(DataRow row, string taskName, ....)
{
    ...
}

Then query itself:

(from ...
 where ...
 select NewRow(table.NewRow(), task.Name, ...)
).CopyToDataTable();