How can I map the results of a sql query onto objects?

Question

Currently, I am using something like this:

    try
    {
      dr = SQL.Execute(sql);

      if(dr != null) {
         while(dr.Read()) {
           CustomObject         


        

Answer 1

You can achieve by creating a generic method for your requirement. Also you can make your new method as the extension for the data table.

    public static List ToList(this DataTable table) where T : class, new()
{
    try
    {
        List list = new List();

        foreach (var row in table.AsEnumerable())
        {
            T obj = new T();

            foreach (var prop in obj.GetType().GetProperties())
            {
                try
                {
                    PropertyInfo propertyInfo = obj.GetType().GetProperty(prop.Name);
                    propertyInfo.SetValue(obj, Convert.ChangeType(row[prop.Name], propertyInfo.PropertyType), null);
                }
                catch
                {
                    continue;
                }
            }

            list.Add(obj);
        }

        return list;
    }
    catch
    {
        return null;
    }
}

}

Usage:

    DataTable dtCustomer = GetCustomers();
    List CustomObjectList = dtCustomer.ToList();