c++ - 如何将 GDI+ 状态转换为字符串？

Question

实际上，主题。我还没有找到将 GDI+ Status(GDI+ 方法返回的错误状态)转换为字符串的任何标准方法，例如 FormatMessage()

Answer 1

如果你想在 GDI+ Status 中转换标签成字符串，那么你能做的最简单的事情就是:

const char* StatusMsgMap[] = 
{
    "Ok",               //StatusMsgMap[Ok] = "Ok";
    "GenericError",     //StatusMsgMap[GenericError] = "GenericError";
    "InvalidParameter", //StatusMsgMap[InvalidParameter] = "InvalidParameter";
    "OutOfMemory",      //StatusMsgMap[OutOfMemory] = "OutOfMemory";
    //so on
};

//Usage:
 std::string error = StatusMsgMap[status]; // where status is Status type!

或者，如果您想要更具描述性的消息，那么:

const char* StatusMsgMap[] =
{
    "the method call was successful",
    "there was an error on the method call, which is identified as something other than those defined by the other elements of this enumeration",
    "one of the arguments passed to the method was not valid",
    //so on
};

由于 Status 中只有 22 个标签枚举，在我看来，以上述方式创建一个 StatusMsgMap 并不是什么大事。 5 分钟绰绰有余!