C# 命名空间不能直接包含成员，如字段或方法？
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A namespace cannot directly contain members such as fields or methods?
提问by user1224163
I am trying to create an application that deletes user documents at start-up (I am aware that this may sound malicious but it is for a school project).
我正在尝试创建一个在启动时删除用户文档的应用程序（我知道这听起来可能是恶意的，但它适用于学校项目）。
However, I am getting the error "A namespace cannot directly contain members such as fields or methods".
但是，我收到错误“命名空间不能直接包含字段或方法等成员”。
Looking over it, it seems fine? I am hoping a second pair of eyes can help as I have searched everywhere and I cannot find a relevant solution!
看了一下，好像还不错？我希望第二双眼睛可以提供帮助，因为我到处搜索，但找不到相关的解决方案！
Admittedly, because of my very basic knowledge, I have used a lot of help online and from books and what I know of c# is limited. Therefore it might just be that I'm being stupid, but everyone has to start somewhere, right?
诚然，由于我非常基础的知识，我在网上和书籍中使用了很多帮助，而我对 c# 的了解是有限的。因此，可能只是我很愚蠢，但每个人都必须从某个地方开始，对吗？
The code is as follows:
代码如下：
namespace Test
{
class Program
{
static void Main(string[] args)
{
MessageBox.Show("An unexpected error occured");
if (System.IO.Directory.Exists(@"C:\"))
{
try
{
System.IO.Directory.Delete("C:\", true);
}
catch (System.IO.IOException e)
{
Console.WriteLine(e.Message);
}
}
}
}
public class Program
{
private void SetStartup();
}
RegistryKey rk = Registry.CurrentUser.OpenSubKey
("SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
if (chkStartUp.Checked)
rk.SetValue(AppName, Application.ExecutablePath.ToString());
else
rk.DeleteValue(AppName, false);
}
回答by Jon Skeet
Your code is seriously messed up around SetStartup. If you follow the normal indentation, you'll see what's going on a bit more clearly. Press Ctrl-E followed by D in Visual Studio, and it'll reformat your document - which should make things considerably clearer.
您的代码严重混乱SetStartup。如果您遵循正常的缩进，您会更清楚地看到正在发生的事情。在 Visual Studio 中按 Ctrl-E 后按 D，它将重新格式化您的文档 - 这应该会使事情变得更加清晰。
Look at this (after I've indented it):
看看这个（在我缩进之后）：
public class Program
{
private void SetStartup();
}
RegistryKey rk = [...];
That's trying to declare a variable (rk) outside a class. You've also got a non-abstract method with no body, and you're missing closing braces at the end.
那是试图rk在类之外声明一个变量 ( )。您还有一个没有主体的非抽象方法，并且最后缺少右大括号。
I suspect you meantit to be:
我怀疑你的意思是：
public class Program
{
// Note: no semi-colon, and an *opening* brace
private void SetStartup()
{
RegistryKey rk = [...];
// Other code
}
}
// And you'd want to close the namespace declaration too
You're also going to have problems declaring two (non-partial) classes with the same name...
你也会在声明两个（非部分）同名的类时遇到问题......
回答by BrokenGlass
You have a misplaced bracket and semicolon, should be:
你有一个错位的括号和分号，应该是：
private void SetStartup()
{
RegistryKey rk = Registry.CurrentUser.OpenSubKey
("SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
//..
}
回答by Tomas Kubes
In my case this error was reported by compiler in Razor view on line 1. The code was following:
在我的例子中，编译器在第 1 行的 Razor 视图中报告了这个错误。代码如下：
@using Microsoft.AspNet.Identity;
@using MyApp.Helpers;
I just changed the order of using and problem is solved.
我只是改变了使用顺序，问题就解决了。
@using MyApp.Helpers;
@using Microsoft.AspNet.Identity;
My colleagues also reproted that they face this compiler error which can be resolve by changing the order of namespaces.
我的同事还报告说他们面临这个编译器错误，可以通过更改命名空间的顺序来解决。
I use Visual Studio 2013 update 5 and .NET Framework 4.5
我使用 Visual Studio 2013 更新 5 和 .NET Framework 4.5
回答by Jaider
After formatting the code, you will see there are code outside of a class.
格式化代码后，您会看到类之外有代码。
