Copy and clone in C #

1. Clone an object

 
Private object cloneobject (Object O) {type T = O. getType (); propertyinfo [] properties = T. getproperties (); object P = T. invokemember ("", system. reflection. bindingflags. createinstance, null, O, null); foreach (propertyinfo PI in properties) {If (Pi. canwrite) {object value = pi. getvalue (O, null); Pi. setvalue (p, value, null) ;}} return P ;}// callCodeIt is convenient to generate a new identical object. Example: textbox t = (textbox) cloneobject (textbox1 );
 

II,Method for cloning the dview specially

Public static datagridview clonedatagridview (datagridgdgv) {try {datagridview resultdgv = new datagridview dview (); resultdgv. columnheadersdefaultcellstyle = dgv. columnheadersdefaultcellstyle. clone (); datagridviewcellstyle dtgvdcs = dgv. rowsdefaultcellstyle. clone (); dtgvdcs. backcolor = dgv. defaultcellstyle. backcolor; dtgvdcs. forecolor = dgv. defaultcellstyle. forecolor; dtgvdcs. font = dgv. defaultcellstyle. font; resultdgv. rowsdefaultcellstyle = dtgvdcs; resultdgv. alternatingrowsdefaultcellstyle = dgv. alternatingrowsdefaultcellstyle. clone (); For (INT I = 0; I <dgv. columns. count; I ++) {maid = dgv. columns [I]. clone () as datagridviewcolumn; dtgvc. displayindex = dgv. columns [I]. displayindex; If (dtgvc. celltype = NULL) {dtgvc. celltemplate = new maid (); resultdgv. columns. add (dtgvc);} else {resultdgv. columns. add (dtgvc) ;}} foreach (maid VaR in dgv. rows) {maid row dtgvr = var. clone () as maid; dtgvr. defaultcellstyle = var. defaultcellstyle. clone (); For (INT I = 0; I <var. cells. count; I ++) {dtgvr. cells [I]. value = var. cells [I]. value;} If (var. index % 2 = 0) dtgvr. defaultcellstyle. backcolor = resultdgv. rowsdefaultcellstyle. backcolor; resultdgv. rows. add (dtgvr);} return resultdgv;} catch (exception ex) {MessageBox. show (ex. message);} return NULL ;}

3. Clone list

// Method 1: List <string> T = new list <string> (); // original list <string> T2 = new list <string> (T. toarray (); // copy of T // Method 2: it is a one liner using LINQ. list <string> list1 = new list <string> (); List <string> list2 = new list <string> (); // This will copy all the items from List 1 to list 2 list1.foreach (I => list2.add (I); // method 3: using system; using system. LINQ; using system. collections. generic; using system. diagnostics; namespace delegates {Class X {public int ID {Get; set;} public string name {Get; Set ;}} class y {public int ID {Get; set ;} public string name {Get; Set ;}} class program {static void main (string [] ARGs) {list <x> X = new list <x> (); for (INT I = 0; I <100; I ++) X. add (New X {id = I, name = string. format ("X _ {0}", I. tostring ()}); // copy X to Y list <Y> Y = new list <Y> (X. convertall <Y> (E => {return New Y {id = E. ID, name = E. name };})); debug. assert (X. count = y. count );}}}

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