创建C++ CLR托管DLL

Question

我有这个类：

public ref class Database 
    { 
    private: 
     String ^username, ^password, ^name, ^telNum, ^celNum, ^address, ^location; 
     String ^tempUser; 
    public: 
     Database(String^, String^, String^, String^, String^, String^, String^); 
     bool ifFileExists(); 
     bool ifAccountExists(); 
     void CreateAccount(); 
    }; 

，我定义的：

bool Database::ifAccountExists() { ifstream File("Database.txt", ios_base::in);

File >>tempUser; //this line gets error I think there is problem with String^

//return true or false }

我该如何解决这个问题？

Answer 1

正如汉斯指出的那样，你将需要提供帮助的管理方，或与托管类型写入整个代码，如下所示：

bool Database::IfAccountExists() 
{ 
    if (System::IO::File::Exists(L"Database.txt")) 
    { 
     array<System::String ^> ^lines = System::IO::File::ReadAllLines(L"Database.txt"); 
     for each(System::String ^line in lines) 
     { 
      array<System::String ^> ^tokens = line->Split('|'); 
      for each (System::String ^token in tokens) 
      { 
       // if found 
       // return true; 
      } 
     } 
    } 

    return false; 
}