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POInheritance issue
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copied!<p>I have an issue with inheritance. I have an interface called <code>Irewhizz</code>:</p> <pre><code>interface Irewhizz { void object save(object obj); void object getdata(object obj); } </code></pre> <p>I've written the definition in a different class:</p> <pre><code>public user:irewhzz { public object save(object obj); public object getdata(object obj); } public client:irewhzz { public object save(object obj); public object getdata(object obj); } </code></pre> <p>Now I have different classes like:</p> <pre><code>public partial class RwUser { #region variables IRewhizzDataHelper irewhizz; IRewhizzRelationDataHelper irewhizzrelation; #endregion //IRewhizz is the interface and its functions are implimented by UserDataHelper class //RwUser Class is inheriting the UserDataHelper Properties and functions. //Here UserDataHelper functions are called with Irewhizz Interface Object but not with the //UserDataHelper class Object It will resolves the unit testing conflict. #region Constructors public RwUser() : this(new UserDataHelper(), new RewhizzRelationalDataHelper()) { } public RwUser(IRewhizzDataHelper repositary, IRewhizzRelationDataHelper relationrepositary) { irewhizz = repositary; irewhizzrelation = relationrepositary; } #endregion #region Properties public int Role { get; set; } public string MobilePhone { get; set; } public bool ChangePassword { get; set; } public byte[] Image { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string MiddleName { get; set; } public string Email { get; set; } public string Website { get; set; } public int AddressId { get; set; } public string City { get; set; } public string Zipcode { get; set; } public string Phone { get; set; } public string Fax { get; set; } public string AboutMe { get; set; } public string username { get; set; } public string password { get; set; } public string SecurityQuestion { get; set; } public string SecurityQAnswer { get; set; } public Guid UserID { get; set; } public long RwUserID { get; set; } #endregion #region MemberFunctions // DataHelperDataContext db = new DataHelperDataContext(); // RewhizzDataHelper rwdh=new RewhizzDataHelper(); //It saves user information entered by user and returns the id of that user public object saveUserInfo(RwUser userObj) { userObj.UserID = irewhizzrelation.GetUserId(username); var res = irewhizz.saveData(userObj); return res; } //It returns the security questions for user registration } </code></pre> <p>and</p> <pre><code> public class Agent : RwUser { IRewhizzDataHelper irewhizz; IRewhizzRelationDataHelper irewhizzrelation; public string Locations { get; set; } public string SelectedLanguages { get; set; } public string SelectedSpecialization { get; set; } public string RegisteredStates { get; set; } public string AgentID { get; set; } public string ExpDate { get; set; } public SelectList RegisterStates { get; set; } public SelectList Languages { get; set; } public SelectList Specializations { get; set; } public int[] RegisterdStates { get; set; } public int RoleId { get; set; } public int SpeclisationId { get; set; } public int[] Language { get; set; } public int LocationTypeId { get; set; } public string BrokarageCompany { get; set; } public string Rolename { get; set; } public int[] Specialization { get; set; } public Agent() : this(new AgentDataHelper(), new RewhizzRelationalDataHelper()) { } public Agent(IRewhizzDataHelper repositary, IRewhizzRelationDataHelper relationrepositary) { irewhizz = repositary; irewhizzrelation = relationrepositary; } public void inviteclient() { //Code related to mailing } public Agent updateData(Agent objectId) { objectId.UserID = irewhizzrelation.GetUserId(objectId.username); objectId = (Agent)irewhizz.updateData(objectId); return objectId; } public Agent GetAgentData(Agent agentodj) { agentodj.UserID = irewhizzrelation.GetUserId(agentodj.username); agentodj = (Agent)irewhizz.getData(agentodj); if (agentodj.RoleId != 0) agentodj.Rolename = (string)(string)irewhizzrelation.getValue(agentodj.RoleId); if (agentodj.RegisterdStates.Count() != 0) { List<SelectListItem> list = new List<SelectListItem>(); string regstates = ""; foreach (int i in agentodj.RegisterdStates) { SelectListItem listitem = new SelectListItem(); listitem.Value = i.ToString(); listitem.Text = (string)irewhizzrelation.getValue(i); list.Add(listitem); regstates += (string)irewhizzrelation.getValue(i) + ","; } SelectList selectlist = new SelectList(list, "Value", "Text"); agentodj.RegisterStates = selectlist; if(regstates!=null) agentodj.RegisteredStates = regstates.Remove(regstates.Length - 1); } if (agentodj.Language.Count() != 0){ List<SelectListItem> list = new List<SelectListItem>(); string selectedlang = ""; foreach (int i in agentodj.Language) { SelectListItem listitem = new SelectListItem(); listitem.Value = i.ToString(); listitem.Text = (string)irewhizzrelation.getValue(i); list.Add(listitem); selectedlang += (string)irewhizzrelation.getValue(i) + ","; } SelectList selectlist = new SelectList(list, "Value", "Text"); agentodj.Languages = selectlist; } if (agentodj.Specialization.Count() != 0) { List<SelectListItem> list = new List<SelectListItem>(); string selectedspel = ""; foreach (int i in agentodj.Specialization) { SelectListItem listitem = new SelectListItem(); listitem.Value = i.ToString(); listitem.Text = (string)irewhizzrelation.getValue(i); list.Add(listitem); selectedspel += (string)irewhizzrelation.getValue(i) + ","; } SelectList selectlist = new SelectList(list, "Value", "Text"); agentodj.Specializations = selectlist; } return agentodj; } public void SaveImage(byte[] pic, String username) { irewhizzrelation.SaveImage(pic, username); } } </code></pre> <p>Now the issue is when ever I am calling the agent class it is giving an error like null reference exception for rwuser class </p> <p>Can anybody give me the solution?</p>

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