convert linq query results to datatable C#

Question

I want to convert the linq query results to datatable so that I can assign datatable to GridView to show it on asp page.

However I am not able to convert the results

Answer 1

If you want to have you own extension method then you could always do something like this:

    public static DataTable ToDataTable(this IQueryable items)
    {
        Type type = typeof(T);

        var props = TypeDescriptor.GetProperties(type)
                                  .Cast()
                                  .Where(propertyInfo => propertyInfo.PropertyType.Namespace.Equals("System"))
                                  .Where(propertyInfo => propertyInfo.IsReadOnly == false)
                                  .ToArray();

        var table = new DataTable();

        foreach (var propertyInfo in props)
        {
            table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyType) ?? propertyInfo.PropertyType);
        }

        foreach (var item in items)
        {
            table.Rows.Add(props.Select(property => property.GetValue(item)).ToArray());
        }

        return table;
    }

You will need to reference both of these

using System.ComponentModel;
using System.Data;