錯誤在另一個類

Question

能否請你讓創建物業自其他類我知道爲什麼我收到此錯誤

CS0029無法隱式轉換類型「字符串」到「UserQuery.Director」

on

m.DirectorName =「Someone」;

在：

void Main() 
{ 
    Movie m = new Movie(); 
    m.Name = "Matrix"; 
    m.DirectorName = "Someone"; 
    Console.WriteLine(m.Name); 
} 

public class Director 
{ 
    public string Name { get; set;} 
} 

public class Movie 
{ 
    public string Name { get; set;} 
    public Director DirectorName { get; set; } 
} 

Answer 1

DirectorName不是字符串。所以你不能給它分配一個字符串。您可以將Director分配給它。由於DirectorName屬性實際上代表了Director，所以它的命名很差。改變你的電影類這樣的：

public class Movie 
{ 
    public string Name { get; set; } 

    public Director MovieDirector { get; set; } 
} 

而且你的方法的代碼如下：

//Create a movie and set the name property 
Movie m = new Movie(); 
m.Name = "Matrix"; 

//Create a director and set the name property 
Director d = new Director(); 
d.Name = "Someone"; 

//Assign the director to the movie by setting the MovieDirector property 
m.MovieDirector = d; 

//Print out the movie's director's name. 
Console.WriteLine(m.MovieDirector.Name); 

---

還爲這個簡寫語法，使用對象初始化：

Movie m = new Movie 
{ 
    Name = "Matrix", 
    MovieDirector = new Director { Name = "Someone" } 
}; 

Answer 2

在你的類的電影，你必須一類的引用。如果要更改導演類中的字符串，請執行m.DirectorName.Name

Answer 3

DirectorName是Director的一種，您嘗試將字符串值傳遞給它。