class Demo { public int id { get; set; } public string name { get; set; } public int age { get; set; } } class Program { static void Main(string[] args) { var list = new List<Demo> { new Demo{ id=1,age=18, name="Tim"}, new Demo{ id=2,age=22, name="Allen"}, new Demo{ id=3,age=24, name="Jim"} }; var ds = list.ToDataSet(); string s=ds.Tables[0].Rows[1][1].ToString(); } } static class Extensions { internal static DataSet ToDataSet<T>(this IList<T> list) { Type elementType = typeof(T); var ds = new DataSet(); var t = new DataTable(); ds.Tables.Add(t); elementType.GetProperties().ToList().ForEach(propInfo => t.Columns.Add(propInfo.Name, Nullable.GetUnderlyingType(propInfo.PropertyType) ?? propInfo.PropertyType)); foreach (T item in list) { var row = t.NewRow(); elementType.GetProperties().ToList().ForEach(propInfo => row[propInfo.Name] = propInfo.GetValue(item, null) ?? DBNull.Value); t.Rows.Add(row); } return ds; } } 转载自:csdn tim