C# 中GUID生成格式的四种方法
C#中GUID的生成以及格式
1、GUID是在System命名空间下的结构（struct）体，下面展示实例。
（1）创建一个GUID帮助类（GUIDHelper）
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Web;
namespaceWebDemo.guid
{
publicclassGuIdHelper
{
///<summary>
///GUID生成
///</summary>
///<paramname="format">格式可填写N、D、B、P、X</param>
///<returns></returns>
publicstaticstringGetNewGuId(stringformat="")
{
if(string.IsNullOrWhiteSpace(format))
returnGuid.NewGuid().ToString();
else
returnGuid.NewGuid().ToString(format);
}
}
}
（2）使用实例
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Web;
usingSystem.Web.UI;
usingSystem.Web.UI.WebControls;
usingSystem.Text;
namespaceWebDemo.guid
{
publicpartialclassIndex:System.Web.UI.Page
{
protectedvoidPage_Load(objectsender,EventArgse)
{
StringBuilderstr=newStringBuilder();
string[]array={"","N","D","B","P","X"};
foreach(variteminarray)
{
if(string.IsNullOrWhiteSpace(item))
str.AppendFormat("默认格式：{0}",GuIdHelper.GetNewGuId());
else
str.AppendFormat("<br/>{0}格式：{1}",item,GuIdHelper.GetNewGuId(item));
}
Response.Write(str.ToString());
}
}
}
（3）显示结果
默认格式：4575c4b3-7997-4f11-acd9-f107258e9adc
N格式：a53a7186b583483aa4580519034e8095
D格式：5ae7f002-a989-4345-864b-3bcfbe09e1da
B格式：{d9762660-8461-4c44-b714-8ffad6e1b79c}
P格式：(694ce704-0a7d-41d5-a25a-4eaedf7db50d)
X格式：{0x75198f26,0xac4e,0x42c8,{0x96,0x88,0xcc,0x91,0xe0,0xa6,0x9b,0x21}
在C#中GUID生成的四种格式
varuuid=Guid.NewGuid().ToString();//9af7f46a-ea52-4aa3-b8c3-9fd484c2af12
varuuidN=Guid.NewGuid().ToString("N");//e0a953c3ee6040eaa9fae2b667060e09
varuuidD=Guid.NewGuid().ToString("D");//9af7f46a-ea52-4aa3-b8c3-9fd484c2af12
varuuidB=Guid.NewGuid().ToString("B");//{734fd453-a4f8-4c5d-9c98-3fe2d7079760}
varuuidP=Guid.NewGuid().ToString("P");//(ade24d16-db0f-40af-8794-1e08e2040df3)
varuuidX=Guid.NewGuid().ToString("X");//{0x3fa412e3,0x8356,0x428f,{0xaa,0x34,0xb7,0x40,0xda,0xaf,0x45,0x6f}}
参考：https://msdn.microsoft.com/en-us/library/97af8hh4.aspx