How to send data from entity framework to stimulsoft report?

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hello.I have writed a project(window application) that use entity framework(code first) for data accessing.
Now I want use stimulsoft for reporting . but RegData method from stimulsoft , get datatable or dataset as argumant.
and I don't Know that how send data from entity framework to stimul report ? anybody can help me?
code for that is :

C#

DatabaseContext db = new DatabaseContext();// this is my context
dataGridView1.DataSource = db.Books.ToList();
stiReport1.RegData((DataSet)db.Books.Select(a => new { a.Title,a.Author}));//this line encounter to error
stiReport1.Compile();
stiReport1.Design();
stiReport1.Render();
stiReport1.Show();

Posted 4-Mar-15 4:29am

hamid025

Updated 4-Mar-15 4:30am

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Richard Deeming · Accepted Answer · 2015-03-04T04:53:00

The result of calling:

C#

db.Books.Select(a => new { a.Title,a.Author})

is an IEnumerable<anonymous-type>. There is no built-in conversion operator to turn that into a DataSet.

Fortunately, it's not too hard to write one yourself:

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;

namespace YourNamespace
{
    public static class Extensions
    {
        public static DataTable ToDataTable<T>(this IEnumerable<T> source, string tableName = null)
        {
            if (source == null) throw new ArgumentNullException("source");
            
            var properties = TypeDescriptor.GetProperties(typeof(T))
                .Cast<PropertyDescriptor>()
                .ToList();
            
            var result = new DataTable(tableName);
            result.BeginInit();

            foreach (var prop in properties)
            {
                result.Columns.Add(prop.Name, prop.PropertyType);
            }

            result.EndInit();
            result.BeginLoadData();
            
            foreach (T item in source)
            {
                object[] values = properties.Select(p => p.GetValue(item)).ToArray();
                result.Rows.Add(values);
            }
            
            result.EndLoadData();
            
            return result;
        }

        public static DataSet ToDataSet<T>(this IEnumerable<T> source, string dataSetName = null, string tableName = null)
        {
            if (source == null) throw new ArgumentNullException("source");
            if (string.IsNullOrEmpty(dataSetName)) dataSetName = "NewDataSet";

            var result = new DataSet(dataSetName);
            result.Tables.Add(source.ToDataTable(tableName));
            return result;
        }
    }
}

With that extension method in place, you should then be able to call:

C#

stiReport1.RegData(db.Books.Select(a => new { a.Title, a.Author }).ToDataSet());