c# - Implementing Unit Of Work in WinForms -

i have implemented repository pattern in winforms application:

unitofwork:

using rccgspp.core; using rccgspp.persistence.repositories; using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.data.entity;  namespace rccgspp.persistence {     //implements logic methods in iunitofwork interface     public class unitofwork     {         //our app contextclassname         private readonly sppcontext _context;         private dbcontext dbcontext;          //recieves our app contextclassname         public unitofwork(sppcontext context)         {             //stores our app contextname in _context             _context = context;             //then uses context initialise both repositories             persons = new personrepository(_context);             sundayservices = new sundayservicerepository(_context);             userpasses = new userrepository(_context);             newcomers = new newcomerrepository(_context);         }          public unitofwork(dbcontext dbcontext)         {             this.dbcontext = dbcontext;         }          //properties          public personrepository persons { get; private set; }         public sundayservicerepository sundayservices { get; private set; }         public userrepository userpasses { get; private set; }         public newcomerrepository newcomers { get; private set; }          //calls savechanges on context         public int complete()         {             return _context.savechanges();         }          //implementation of dispose method dispose context         public void dispose()         {             _context.dispose();         }     } } 

my form whwere want use unitofwork, have declared readonly property have included in contructor initialise since form load @ click of button "there no argument given corresponds required formal parameter 'unitofwork'"

form use unitofwork

    public partial class register : materialform     {         private readonly iunitofwork _unitofwork;         string username;         string psswrd;         string confirmpsswrd;          public register(iunitofwork unitofwork)         {             initializecomponent();             //set preferred colors &theme (material skin)             var materialskinmanager = materialskinmanager.instance;             materialskinmanager.addformtomanage(this);             materialskinmanager.theme = materialskinmanager.themes.dark;             materialskinmanager.colorscheme = new colorscheme(primary.blue400, primary.red900, primary.brown900, accent.lightblue200, textshade.black);             //prevent form resizing              sizable = false;              //unitofwork             _unitofwork = unitofwork;         }           private void register_load(object sender, eventargs e)         {          }          private void btnsubmit_click(object sender, eventargs e)         {             //get user email , password register in db             username = textemail.text;             psswrd = textpassword.text;             confirmpsswrd = textconfirmpassword.text;             //compare password             bool conres = comparepassword(psswrd, confirmpsswrd);             if (conres)             {                 //insert db using unitofwork                 userpass usertodb = new userpass                 {                     username = this.username,                     password = this.psswrd,                  };                  _unitofwork.userpasses.add(usertodb);                 //commit calling complete()                 _unitofwork.complete();                 //feedback registered sucessfull                 labelerrorpassword.text = "successful, login!";             }             else             {                 labelerrorpassword.backcolor = color.red;                 labelerrorpassword.text = "the passwords don't match!"; //show in label password not same             }         }           /**********method compare password**********************/         public bool comparepassword(string pss1, string pss2)         {             if (pss1.equals(pss2))             {                 return true;             }             else return false;         }     } 

loading form :

private void btnregister_click(object sender, eventargs e) {     //load register form,     register nform = new register();     nform.show(); } 

how can make use of unitofwork in winform application.

as @stuartd said, parameterless contructor form in winforms recommended. of course can add constructor arguments.

public register() {     initializecomponent();     //set preferred colors &theme (material skin)     var materialskinmanager = materialskinmanager.instance;     materialskinmanager.addformtomanage(this);     materialskinmanager.theme = materialskinmanager.themes.dark;     materialskinmanager.colorscheme = new colorscheme(primary.blue400, primary.red900, primary.brown900, accent.lightblue200, textshade.black);     //prevent form resizing      sizable = false;      //unitofwork, not initialized here     //_unitofwork = unitofwork; }      public register(iunitofwork unitofwork) : this() // call default constructor! {   _unitofwork = unitofwork; } 

i recommend leave auto-generated , custom initialization code in default (parameterless) constructor. so, winforms designer not stop working.

we use strategy in combination di containers in several projects without problem.