Declare a new object instance from an exist object instance

Question

I try to code a common method to fill in an class object list with datatable as following: public static List FillDataTable(object obj DataTable dt) { List objList = new List(); object o = new object(); //how to declare this instance based on the object obj??? foreach (DataRow dr in dt.Rows) { //code to fill datarow to the object o objList.Add(o); } return objList; } Call this method as followiing: List lstObj = new List(); lstObj = FillDataTable(((object)new myClass()) dt).OfType().ToList();

Nilesh Shah · Answer

It seems you did not specify what you really want to do. Why this object comes into picture if you want to simply get list of records from a database call? Do you want to write some generic solution which will work on multiple classes? then your answer is to use generic class google for it. your code is also not clear you loop thru DataRows and don't use it at all in your loop. if you want to fill in data from DataRows you must specify it's column names and accordingly fill in an object with matching property.

Jim Feng · Answer

As I said at begining I try to write a common nethod to fill a class object list with datatable for all different classes. Since it's for different classes I need to pass a class instance as a object to the method. In the mothed I neet a way to create a new object instance from the passed in class object instance and then fill the new object instance with datarow.