c# - Undo redo in window form and gridcontrol -

i have window form has multiple control , grid-view control , want add undo redo functionality form 20 levels,please help.

dtstates = new datatable();             datacolumn dcindex = new datacolumn("id", typeof(int));             dcindex.autoincrement = true;             dcindex.autoincrementseed = 1;             dcindex.autoincrementstep = 1;             dtstates.columns.add(dcindex);              dtstates.columns.add("control", typeof(object));             dtstates.columns.add("type", typeof(object));             dtstates.columns.add("value", typeof(string));             dtstates.columns.add("controlid", typeof(string)); 

this datatable record action of form.but in case of gridview ,i confuse how record , maintain changes.

your gridview show data datatable or better list. need save data. in fact datasource. save objects need deep copy (how do deep copy of object in .net (c# specifically)?) of it. need list hold different versions. if using memento design-pattern , generics can build general class undo/redo can use in other programs or components too.

maybe example can help:

[serializable()] public class clsschnappschuss<t> {     private memorystream mvarbeitspeicherzugriff;     private binaryformatter mvformatierer;      public clsschnappschuss()     {         if (attribute.getcustomattribute(typeof(t), typeof(serializableattribute)) == null)         {             trace.writeline(string.concat(typeof(t).fullname,                                            " ist nicht serialisiebar!"));             throw new invalidoperationexception(string.concat(string.format("{0} ist nicht serialisierbar.",                                                                             typeof(t).fullname),                                                                             " die klasse muss das attribut ",                                                                             "serializable einbinden ",                                                                             "[serializable()] ",                                                                             "um clsschnappschuss verwenden zu ",                                                                             "können."));         }          mvformatierer = new binaryformatter();     }      public clsschnappschuss<t> bxspeichern(t obj)     {         mvarbeitspeicherzugriff = new memorystream();         mvformatierer.serialize(mvarbeitspeicherzugriff, obj);         return this;     }      public t bxwiederherstellen()     {         mvarbeitspeicherzugriff.seek(0, seekorigin.begin);         mvformatierer.binder = new clscustombinder();         t obj = (t)mvformatierer.deserialize(mvarbeitspeicherzugriff);         mvarbeitspeicherzugriff.close();         return obj;     } } 

in class data stored:

public class clsaufbewahrer<t> {     private list<clsschnappschuss<t>> liste;      public clsaufbewahrer()     {         liste = new list<clsschnappschuss<t>>(10);     }      public clsaufbewahrer(int listenkapazität)     {         liste = new list<clsschnappschuss<t>>(listenkapazität);     }      public list<clsschnappschuss<t>> schnappschuesse      {          get;          set;      } }