c# mongodb convert between list and bson, and save bson in asp.net web core session
时间: 2024-03-02 09:52:56 浏览: 154
【ASP.NET编程知识】asp.net core集成MongoDB的完整步骤.docx
To save the BSON in ASP.NET Core session, you can serialize the BSON to a byte array and store it in the session as a string. Here's an example:
```
using MongoDB.Bson;
using MongoDB.Bson.IO;
using MongoDB.Bson.Serialization;
using MongoDB.Driver;
using Microsoft.AspNetCore.Http;
using System.IO;
using System.Text;
// Convert a list to BSON
List<string> list = new List<string> { "one", "two", "three" };
BsonArray bsonArray = new BsonArray(list);
BsonDocument bsonDocument = new BsonDocument { { "list", bsonArray } };
// Serialize the BSON to a byte array
var memoryStream = new MemoryStream();
var writer = new BsonBinaryWriter(memoryStream);
BsonSerializer.Serialize(writer, typeof(BsonDocument), bsonDocument);
byte[] bsonBytes = memoryStream.ToArray();
// Convert the byte array to a string
string bsonString = Encoding.UTF8.GetString(bsonBytes);
// Save the BSON in session
HttpContext.Session.SetString("bson", bsonString);
```
To retrieve the BSON from session and convert it back to a list:
```
// Retrieve the BSON from session
string bsonString = HttpContext.Session.GetString("bson");
byte[] bsonBytes = Encoding.UTF8.GetBytes(bsonString);
// Deserialize the BSON to a BsonDocument
var memoryStream = new MemoryStream(bsonBytes);
var reader = new BsonBinaryReader(memoryStream);
BsonDocument bsonDocument = BsonSerializer.Deserialize<BsonDocument>(reader);
// Convert the BsonDocument to a list
BsonArray bsonArray = bsonDocument["list"].AsBsonArray;
List<string> list = bsonArray.Select(x => x.AsString).ToList();
```
Note that you need to add the `MongoDB.Driver` and `Microsoft.AspNetCore.Session` NuGet packages to your project to use the MongoDB C# driver and ASP.NET Core session.
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