What are the methods for generating GUID formats in C#?
1. GUID is a structure (struct) under the System namespace. An example is shown below.
(1) Create a GUID helper class (GUIDHelper)
using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace WebDemo.guid { public class GuIdHelper { /// <summary> /// GUID生成 /// </summary> /// <param name="format">格式 可填写N、D、B、P、X</param> /// <returns></returns> public static string GetNewGuId(string format="") { if (string.IsNullOrWhiteSpace(format)) return Guid.NewGuid().ToString(); else return Guid.NewGuid().ToString(format); } } }
(2) Use an example
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Text; namespace WebDemo.guid { public partial class Index : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { StringBuilder str = new StringBuilder(); string[] array = {"","N","D","B","P","X" }; foreach (var item in array) { 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) Display the result
Default format: 4575c4b3-7997 -4f11-acd9-f107258e9adc
N format: a53a7186b583483aa4580519034e8095
D format: 5ae7f002-a989-4345-864b-3bcfbe09e1da
B format: {d9762660-8461-4c44- b714-8ffad6e1b79c}
P format (694ce704-0a7d-41d5-a25a-4eaedf7db50d)
Four formats for GUID generation
var uuid = Guid.NewGuid().ToString(); // 9af7f46a-ea52-4aa3-b8c3-9fd484c2af12 var uuidN = Guid.NewGuid().ToString("N"); // e0a953c3ee6040eaa9fae2b667060e09 var uuidD = Guid.NewGuid().ToString("D"); // 9af7f46a-ea52-4aa3-b8c3-9fd484c2af12 var uuidB = Guid.NewGuid().ToString("B"); // {734fd453-a4f8-4c5d-9c98-3fe2d7079760} var uuidP = Guid.NewGuid().ToString("P"); // (ade24d16-db0f-40af-8794-1e08e2040df3) var uuidX = Guid.NewGuid().ToString("X"); // {0x3fa412e3,0x8356,0x428f,{0xaa,0x34,0xb7,0x40,0xda,0xaf,0x45,0x6f}}
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