Answers:
您可能正在寻找System.Guid.NewGuid()
。
ToString(string format)
接受多个格式说明符之一的重载。
System.Guid.NewGuid().ToString("B").ToUpper()
如果您想与某些无法理解小写UUID的MS Build工具兼容,则可能需要这样做。例如,vdproj
安装项目的UUID为大写,如果您将其写为小写,则会抛出异常。
请注意:.NET Guid和(RFC4122)UUID的字符串表示形式相同,但存储格式却不同。.NET的前三Guid
部分以小尾数字节交换。
如果要传输字节(例如,作为base64),则不能只使用Guid.ToByteArray()
它并对其进行编码。您将需要Array.Reverse
前三个部分(Data1-3)。
我这样做:
var rfc4122bytes = Convert.FromBase64String("aguidthatIgotonthewire==");
Array.Reverse(rfc4122bytes,0,4);
Array.Reverse(rfc4122bytes,4,2);
Array.Reverse(rfc4122bytes,6,2);
var guid = new Guid(rfc4122bytes);
有关特定的.NET实现细节,请参见此答案。
编辑:感谢Code Ranger的Jeff Walker指出,内部结构与传入和传出字节数组构造函数和的字节数组的格式无关ToByteArray()
。
Guid
(因为它是为.idl设计的),但是我碰到了这个问题。Bingers和Googlers,您来了。
ToByteArray
则不然。他们总是lil'-endian。编辑输入。
这是客户端的“顺序引导”解决方案。
http://www.pinvoke.net/default.aspx/rpcrt4.uuidcreate
using System;
using System.Runtime.InteropServices;
namespace MyCompany.MyTechnology.Framework.CrossDomain.GuidExtend
{
public static class Guid
{
/*
Original Reference for Code:
http://www.pinvoke.net/default.aspx/rpcrt4/UuidCreateSequential.html
*/
[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out System.Guid guid);
public static System.Guid NewGuid()
{
return CreateSequentialUuid();
}
public static System.Guid CreateSequentialUuid()
{
const int RPC_S_OK = 0;
System.Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException("UuidCreateSequential failed: " + hr);
return g;
}
/*
Text From URL above:
UuidCreateSequential (rpcrt4)
Type a page name and press Enter. You'll jump to the page if it exists, or you can create it if it doesn't.
To create a page in a module other than rpcrt4, prefix the name with the module name and a period.
. Summary
Creates a new UUID
C# Signature:
[DllImport("rpcrt4.dll", SetLastError=true)]
static extern int UuidCreateSequential(out Guid guid);
VB Signature:
Declare Function UuidCreateSequential Lib "rpcrt4.dll" (ByRef id As Guid) As Integer
User-Defined Types:
None.
Notes:
Microsoft changed the UuidCreate function so it no longer uses the machine's MAC address as part of the UUID. Since CoCreateGuid calls UuidCreate to get its GUID, its output also changed. If you still like the GUIDs to be generated in sequential order (helpful for keeping a related group of GUIDs together in the system registry), you can use the UuidCreateSequential function.
CoCreateGuid generates random-looking GUIDs like these:
92E60A8A-2A99-4F53-9A71-AC69BD7E4D75
BB88FD63-DAC2-4B15-8ADF-1D502E64B92F
28F8800C-C804-4F0F-B6F1-24BFC4D4EE80
EBD133A6-6CF3-4ADA-B723-A8177B70D268
B10A35C0-F012-4EC1-9D24-3CC91D2B7122
UuidCreateSequential generates sequential GUIDs like these:
19F287B4-8830-11D9-8BFC-000CF1ADC5B7
19F287B5-8830-11D9-8BFC-000CF1ADC5B7
19F287B6-8830-11D9-8BFC-000CF1ADC5B7
19F287B7-8830-11D9-8BFC-000CF1ADC5B7
19F287B8-8830-11D9-8BFC-000CF1ADC5B7
Here is a summary of the differences in the output of UuidCreateSequential:
The last six bytes reveal your MAC address
Several GUIDs generated in a row are sequential
Tips & Tricks:
Please add some!
Sample Code in C#:
static Guid UuidCreateSequential()
{
const int RPC_S_OK = 0;
Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException
("UuidCreateSequential failed: " + hr);
return g;
}
Sample Code in VB:
Sub Main()
Dim myId As Guid
Dim code As Integer
code = UuidCreateSequential(myId)
If code <> 0 Then
Console.WriteLine("UuidCreateSequential failed: {0}", code)
Else
Console.WriteLine(myId)
End If
End Sub
*/
}
}
关键字:CreateSequentialUUID SequentialUUID
我对方法一无所知。但是,GUID的类型可以通过以下方式完成:
Guid iid = System.Runtime.InteropServices.Marshal.GenerateGuidForType(typeof(IFoo));
我有一个GitHub Gist,它在C#中具有类似UUID的Java实现: https //gist.github.com/rickbeerendonk/13655dd24ec574954366
就像Java中一样,可以从最低和最高有效位创建UUID。它还暴露了它们。该实现具有到GUID的显式转换和来自GUID的隐式转换。
Guid.NewGuid()
?