List转换成DataTable

 /// <summary>         /// 将泛类型集合List类转换成DataTable         /// </summary>         /// <param name="list">泛类型集合</param>         /// <returns></returns>         public static DataTable ListToDataTable<T>(List<T> entitys)         {             //检查实体集合不能为空             if (entitys == null || entitys.Count < 1)             {                 throw new Exception("需转换的集合为空");             }             //取出第一个实体的所有Propertie             Type entityType = entitys[0].GetType();             PropertyInfo[] entityProperties = entityType.GetProperties();             //生成DataTable的structure             //生产代码中，应将生成的DataTable结构Cache起来，此处略             DataTable dt = new DataTable();             for (int i = 0; i < entityProperties.Length; i++)             {                 //dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);                 dt.Columns.Add(entityProperties[i].Name);             }             //将所有entity添加到DataTable中             foreach (object entity in entitys)             {                 //检查所有的的实体都为同一类型                 if (entity.GetType() != entityType)                 {                     throw new Exception("要转换的集合元素类型不一致");                 }                 object[] entityValues = new object[entityProperties.Length];                 for (int i = 0; i < entityProperties.Length; i++)                 {                     entityValues[i] = entityProperties[i].GetValue(entity, null);                 }                 dt.Rows.Add(entityValues);             }             return dt;         }