如何在 C# 中将 GUID 转换为字符串？
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How to convert a GUID to a string in C#?
提问by Dave
I'm new to C#.
我是 C# 的新手。
I know in vb.net, i can do this:
我知道在 vb.net 中，我可以这样做：
Dim guid as string = System.Guid.NewGuid.ToString
In C#, I'm trying to do
在 C# 中，我正在尝试做
String guid = System.Guid.NewGuid().ToString;
but i get an "Cannot convert method group 'ToString' to non-delegate type 'string'. Did you intend to invoke the method?" error.
但我收到“无法将方法组‘ToString’转换为非委托类型‘字符串’。您是否打算调用该方法？” 错误。
采纳答案by Blindy
You're missing the ()after ToStringthat marks it as a function call vs. a function reference (the kind you pass to delegates), which incidentally is why c# has no AddressOfoperator, it's implied by how you type it.
您错过了()之后将ToString其标记为函数调用与函数引用（您传递给委托的那种），顺便说一句，这就是为什么 c# 没有AddressOf运算符的原因，它是由您键入它的方式所暗示的。
Try this:
尝试这个：
string guid = System.Guid.NewGuid().ToString();
回答by BennyM
String guid = System.Guid.NewGuid().ToString();
Otherwise it's a delegate.
否则它是一个代表。
回答by Stephen Newman
You need
你需要
String guid = System.Guid.NewGuid().ToString();
回答by Shiraz Bhaiji
you are missing () on the end of ToString.
您在 ToString 的末尾缺少 ()。
回答by Makach
Did you write
你写了吗
String guid = System.Guid.NewGuid().ToString;
or
或者
String guid = System.Guid.NewGuid().ToString();
notice the paranthesis
注意括号
回答by Thomas
In Visual Basic, you can call a parameterless method without the braces (()). In C#, they're mandatory. So you should write:
在 Visual Basic 中，您可以调用不带大括号 ( ()) 的无参数方法。在 C# 中，它们是强制性的。所以你应该写：
String guid = System.Guid.NewGuid().ToString();
Without the braces, you're assigning the method itself (instead of its result) to the variable guid, and obviously the method cannot be converted to a String, hence the error.
没有大括号，您将方法本身（而不是其结果）分配给变量guid，显然该方法无法转换为 a String，因此出现错误。
回答by Vadim Gremyachev
According to MSDNthe method Guid.ToString(string format)returns a string representation of the value of this Guid instance, according to the provided format specifier.
根据MSDN，该方法Guid.ToString(string format)根据提供的格式说明符返回此 Guid 实例值的字符串表示形式。
Examples:
例子：
guidVal.ToString()orguidVal.ToString("D")returns 32 digits separated by hyphens:00000000-0000-0000-0000-000000000000guidVal.ToString("N")returns 32 digits:00000000000000000000000000000000guidVal.ToString("B")returns 32 digits separated by hyphens, enclosed in braces:{00000000-0000-0000-0000-000000000000}
guidVal.ToString()或guidVal.ToString("D")返回由连字符分隔的 32 位数字：00000000-0000-0000-0000-000000000000guidVal.ToString("N")返回 32 位数字：00000000000000000000000000000000guidVal.ToString("B")返回由连字符分隔的 32 位数字，括在大括号中：{00000000-0000-0000-0000-000000000000}
回答by hadi sorosh
Guid guidId = Guid.Parse("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx");
string guidValue = guidId.ToString("D"); //return with hyphens
回答by Drew Noakes
Here are examples of output from each of the format specifiers:
以下是每个格式说明符的输出示例：
N: cd26ccf675d64521884f1693c62ed303
D: cd26ccf6-75d6-4521-884f-1693c62ed303
B: {cd26ccf6-75d6-4521-884f-1693c62ed303}
P: (cd26ccf6-75d6-4521-884f-1693c62ed303)
X: {0xcd26ccf6,0x75d6,0x4521,{0x88,0x4f,0x16,0x93,0xc6,0x2e,0xd3,0x03}}
The default is D.
默认为D。
回答by Platypus
Following Sonar rules, you should whenever you can try to protect yourself, and use
System.globalisationwhenever it's possible like for DateTime.ToString().
遵循声纳规则，你应该在任何时候尝试保护自己，并System.globalisation在可能的情况下使用
for DateTime.ToString()。
So regarding the other answers you could use:
因此，关于您可以使用的其他答案：
guid.ToString("", CultureInfo.InvariantCulture)
where ""can be replaces by : N, D, B , P and X for more infos see this comment.
其中""可以替换为：N、D、B、P 和 X 了解更多信息，请参阅此评论。
Example here
示例在这里
