對象未設置爲類調用的實例錯誤

Question

我設置了三個模型。我不確定我是否以最好的方式做到了這一點，但這是我可以輕鬆理解的方式。我調用DepartmentProfile類。找到的第一個用戶不是經理，因此它進入else語句併成功填入AD_UserProfile並將其添加到DepartmentProfile類。

第二個用戶是部門經理，所以它進入if語句和錯誤在第一行沒有設置對象實例的對象。我錯過了什麼？我沒有正確設置模型嗎？

當出現了錯誤

public class AD_UserProfile 
    { 
     public string distinguishedName { get; set; } 
     public string email { get; set; } 
     public string manager { get; set; } 
     public string name { get; set; } 
     public string userPrincipalName { get; set; } // Useful if we need to allow a user to 'log on' as a different user. 
     public string userName { get; set; } 
    } 

public class AD_ManagerProfile 
    { 
     public string distinguishedName { get; set; } 
     public string email { get; set; } 
     public string manager { get; set; } 
     public string name { get; set; } 
     public string userPrincipalName { get; set; } // Useful if we need to allow a user to 'log on' as a different user. 
     public string userName { get; set; } 
    } 

public class AD_DepartmentProfile 
    { 
     public AD_DepartmentProfile() 
     { 
      this.AD_UserProfile = new HashSet<AD_UserProfile>(); 
     } 

     public string name { get; set; } 

     public virtual AD_ManagerProfile AD_ManagerProfile { get; set; } 
     public virtual ICollection<AD_UserProfile> AD_UserProfile { get; set; } 
    } 

這裏是類的調用：

public void GetDepartmentInfo(string department, string owner = "jeremy") 
     { 
      DirectoryEntry de = new DirectoryEntry("LDAP://server.server.com"); 

      DirectorySearcher ds = new DirectorySearcher(de); 

      ds.Filter = ("(&(objectCategory=person)(objectClass=User)(department=" + department + "))"); 
      ds.SearchScope = SearchScope.Subtree; 

      AD_DepartmentProfile dp = new AD_DepartmentProfile(); 

      dp.name = department; // assign department name 

      foreach (SearchResult temp in ds.FindAll()) 
      { 
       if (owner == temp.Properties["sAMAccountName"][0].ToString()) 
       { 
        //Current user is manager of department 

        dp.AD_ManagerProfile.distinguishedName = temp.Properties["distinguishedName"][0].ToString(); // This line errors out with instance not set to object error. 
        dp.AD_ManagerProfile.email = temp.Properties["mail"][0].ToString(); 
        dp.AD_ManagerProfile.manager = temp.Properties["manager"][0].ToString(); 
        dp.AD_ManagerProfile.name = temp.Properties["name"][0].ToString(); 
        dp.AD_ManagerProfile.userPrincipalName = temp.Properties["userPrincipalName"][0].ToString(); 
        dp.AD_ManagerProfile.userName = temp.Properties["sAMAccountName"][0].ToString(); 
       } 
       else 
       { 
        //Current user is in department and does not manage it 

        AD_UserProfile p = new AD_UserProfile(); 

        p.distinguishedName = temp.Properties["distinguishedName"][0].ToString(); 
        p.email = temp.Properties["mail"][0].ToString(); 
        p.manager = temp.Properties["manager"][0].ToString(); 
        p.name = temp.Properties["name"][0].ToString(); 
        p.userPrincipalName = temp.Properties["userPrincipalName"][0].ToString(); 
        p.userName = temp.Properties["sAMAccountName"][0].ToString(); 

        dp.AD_UserProfile.Add(p); 
       } 
      } 
     } 

Answer 1

我沒有看到任何地方，你初始化dp.AD_ManagerProfile，所以它很可能null。您可以在GetDepartmentInfo或構造函數中給它一個值。

if (owner == temp.Properties["sAMAccountName"][0].ToString()) 
{ 
    //Current user is manager of department 

    dp.AD_ManagerProfile = new AD_ManagerProfile(); 

    dp.AD_ManagerProfile.distinguishedName = temp.Properties["distinguishedName"][0].ToString(); // This line errors out with instance not set to object error. 

或

public AD_DepartmentProfile() 
{ 
    this.AD_UserProfile = new HashSet<AD_UserProfile>(); 
    this.AD_ManagerProfile = new AD_ManagerProfile(); 
}