netcore读取json文件,net core 读取json文件数据集合

在.Net Framework中,配置文件一般采用的是XML格式的,.NET Framework提供了专门的ConfigurationManag

今天,小编要为大家讲解的内容是Net Core 读取json文件,这是因为有很多的朋友对于netcore读取json文件,net core 读取json文件数据集合,netcore读取json文件转对象集合等问题不是那么的了解,对此,小编就为大家整理出了以下内容,大家可以跟着小编一起来看看

在.Net Framework中,配置文件一般采用的是XML格式的,.NET Framework提供了专门的ConfigurationManager来读取配置文件的内容,.net core中推荐使用json格式的配置文件,那么在.net core中该如何读取json文件呢?

1、在Startup类中读取json配置文件

在Startup加入配置

var configurationBuilder = new ConfigurationBuilder(); var builder = configurationBuilder.AddJsonFile(“UploadFile/GetCourts.json”, false, true).AddJsonFile(“UploadFile/Queryareadatalevelall.json”, false, true); var Courtlist = new Courtlist(); builder.Build().GetSection(“Courtsmodel”).Bind(Courtlist); services.AddSingleton(Courtlist);

构造函数注入读取

private readonly Courtlist _Courtlist; private readonly AreaRootobjectlist _AreaRootobjectlist; public DmsCacheService( AreaRootobjectlist AreaRootobjectlist, Courtlist Courtlist, ILogger<DmsCacheService> logger, AccessAddressDto accessAddress, IEasyCachingProvider provider, IJudgeBannedWordsService judgeBannedWordsService, IJudgeService judgeService, IMapper mapper) { this.provider = provider; this.judgeService = judgeService; this.judgeBannedWordsService = judgeBannedWordsService; this.mapper = mapper; this.accessAddress = accessAddress; this.logger = logger; _Courtlist = Courtlist; _AreaRootobjectlist = AreaRootobjectlist; } public List<Court> GetCourts() {return _Courtlist.Courtlists; }

2、从硬盘直接读取

定义读取方法

private T GetDataByLocal<T>(string jsonfileName) { var res = this.provider.Get<T>(jsonfileName);if (res.HasValue) {return res.Value; } var filePath = $”/UploadFile/”; string applicationRoot = AppContext.BaseDirectory; var provider = new PhysicalFileProvider(applicationRoot); var completeFilePath = Path.Combine(filePath, jsonfileName);if (!System.IO.File.Exists(AppContext.BaseDirectory + completeFilePath)) { throw new Exception(“文件不存在”); } var formFile = provider.GetFileInfo(completeFilePath); var stream = formFile.CreateReadStream(); Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); Encoding encoding = Encoding.GetEncoding(“gb2312”); using var reader = new StreamReader(stream, encoding); string rs = reader.ReadToEnd(); var result = JsonConvert.DeserializeObject<T>(rs); this.provider.Set<T>(jsonfileName, result, this.GetExpiredTimeSpan());return result; }

传入文件名进行读取

public List<CaseCodeType> GetCaseCodes() {return this.GetDataByLocal<List<CaseCodeType>>(“GetCaseCodes.json”); }

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