我想用ConfigurationBuidler
阅读我的appsettings.json
文件。我看不出我做错了什么。
我的文件是
{
"comment": "this gets copied to bin\\debug on build. the app updates the copy. However to remember the settings you need to paste them here",
"col1Width": "344"
}
我的测试失败
[TestMethod]
public void TestMethod1()
{
var configuration = Helper.LoadConfiguration("appsettings.json");
Assert.IsTrue(configuration.Properties.Keys.Contains("col1Width")); // fails here
}
我的助手类是:
public static class Helper
{
public static ConfigurationBuilder LoadConfiguration(string filename)
{
var configuration = new ConfigurationBuilder();
var currentDirectory = System.IO.Directory.GetCurrentDirectory();
configuration.SetBasePath(currentDirectory);
configuration.AddJsonFile(path: filename, optional: false, reloadOnChange: true);
configuration.Build();
return configuration;
}
}
Update:
我根据 Marco 指出的博客文章更正了问题标题并更新了代码,如下所示。
Only Bind()
不可用
public static class Helper
{
public static FeedReadConfiguration GetApplicationConfiguration( )
{
var configuration = new FeedReadConfiguration();
var currentDirectory = System.IO.Directory.GetCurrentDirectory();
var iConfig = GetIConfigurationRoot(currentDirectory);
iConfig
.GetSection("FeedRead")
.Bind(configuration); // Not available
return configuration;
}
public static IConfigurationRoot GetIConfigurationRoot(string outputPath)
{
return new ConfigurationBuilder()
.SetBasePath(outputPath)
.AddJsonFile("appsettings.json")
.Build();
}
}
public class FeedReadConfiguration
{
public int Col1Width { get; set; }
}
根据显示的设置文件,没有"FeedRead"
section
这些设置需要直接从根读取。
using Microsoft.Extensions.Configuration;
public static class Helper {
public static FeedReadConfiguration GetApplicationConfiguration( ) {
var currentDirectory = System.IO.Directory.GetCurrentDirectory();
var iConfig = GetIConfigurationRoot(currentDirectory);
//Microsoft.Extensions.Configuration.Binder.dll
FeedReadConfiguration configuration = iConfig.Get<FeedReadConfiguration>();
return configuration;
}
public static IConfiguration GetIConfigurationRoot(string outputPath) {
return new ConfigurationBuilder()
.SetBasePath(outputPath)
.AddJsonFile("appsettings.json")
.Build();
}
}
(需要Microsoft.Extensions.Configuration.Binder https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Binder/ and Microsoft.Extensions.Configuration.Json https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json)
参考ASP.NET Core 中的配置 https://learn.microsoft.com/en-us/aspnet/core/fundamentals/configuration
参考ASP.NET Core 中的选项模式 https://learn.microsoft.com/en-us/aspnet/core/fundamentals/configuration/options
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