如何在Configuration Builder中设置核心2.0中的基础路径
如何在Core 2.0中的ConfigurationBuilder中设置基础路径。如何在Configuration Builder中设置核心2.0中的基础路径
我用Google搜索,发现this问题,this来自微软的文档,以及2.0文档在线,但他们似乎可以用一个版本的Microsoft.Extension.Configuration
从1.0.0-beta8。我想读appsettings.json
。 Core 2.0中有这样一种新的方式吗?
using System;
using System.IO;
using Microsoft.Extensions.Configuration;
namespace ConsoleApp2
{
class Program
{
public static IConfigurationRoot Configuration { get; set; }
static void Main(string[] args)
{
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory()) // <== compile failing here
.AddJsonFile("appsettings.json");
Configuration = builder.Build();
Console.WriteLine(Configuration.GetConnectionString("con"));
Console.WriteLine("Press a key...");
Console.ReadKey();
}
}
}
appsetting.json
{
"ConnectionStrings": {
"con": "connection string"
}
}
UPDATE: 以及增加Miscrosoft.Extension.Configuration.FileExtenson通过Set我还需要指示添加Microsoft.Extensions.Configuration.Json得到AddJsonFile
扩展。
SetBasePath
扩展方法定义在Config.FileExtensions。
你需要添加一个依赖到Microsoft.Extensions.Configuration.FileExtensions包。
我正在使用Visual Studio 2017 v15.5开发.NET Core 2控制台应用程序。正如其他人所指出的,添加Microsoft.Extensions.Configuration后,我需要添加Microsoft.Extensions.Configuration.Json以使AddJsonFile()
调用正常工作。这也使SetBasePath()
调用工作;所以我不需要添加Configuration.FileExtensions。 (我的代码编译并同时运行和不运行。)
我也打了电话AddEnvironmentVariables()
,为此我需要添加Configuration.EnvironmentVariables。我的代码如下:
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory()) // requires Microsoft.Extensions.Configuration.Json
.AddJsonFile("appsettings.json") // requires Microsoft.Extensions.Configuration.Json
.AddEnvironmentVariables(); // requires Microsoft.Extensions.Configuration.EnvironmentVariables
Configuration = builder.Build();
有趣的是,只有using
声明我需要的是using Microsoft.Extensions.Configuration
。
使用'Microsoft.Extensions.Configuration'和'Microsoft.Extensions.Configuration.Json'这将解决这个问题。
https://www.nuget.org/packages/Microsoft.Extensions.Configuration/ https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json/
这里是样本 '连接工厂'
using System.Data;
using System.Data.SqlClient;
using Microsoft.Extensions.Configuration;
using System.IO;
namespace DataAccess.Infrastructure
{
public class ConnectionFactory : IConnectionFactory
{
public ConnectionFactory()
{
var builder = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json");
Configuration = builder.Build();
}
public IConfigurationRoot Configuration { get; }
public IDbConnection GetConnection
{
get
{
var connectionString = Configuration.GetConnectionString("DefaultConnection");
var conn = new SqlConnection(connectionString);
conn.Open();
return conn;
}
}
#region IDisposable Support
private bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
// TODO: dispose managed state (managed objects).
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
disposedValue = true;
}
}
// TODO: override a finalizer only if Dispose(bool disposing) above has code to free unmanaged resources.
// ~ConnectionFactory() {
// // Do not change this code. Put cleanup code in Dispose(bool disposing) above.
// Dispose(false);
// }
// This code added to correctly implement the disposable pattern.
public void Dispose()
{
// Do not change this code. Put cleanup code in Dispose(bool disposing) above.
Dispose(true);
// TODO: uncomment the following line if the finalizer is overridden above.
// GC.SuppressFinalize(this);
}
#endregion
} }
但现在的 “AddJsonFile” 方法是找不到的。 :D我不得不添加这个包也:“Microsoft.Extensions.Configuration.Json”。 – JedatKinports