如何在.net Core 3.1中使用ConfigurationBulder绑定到配置类 [英] How can I bind to a configuration class using ConfigurationBulder in .net core 3.1
问题描述
我想使用ConfigurationBuidler
读取我的appsettings.json
文件.我看不到我在做什么错.
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
}
我的助手班是
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;
}
}
[更新]
根据Marco Marco指向我的博客文章,我更正了问题标题并按如下所示更新了代码.
仅.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; }
}
基于显示的设置文件,没有"FeedRead"
部分
需要直接从根目录读取设置.
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();
}
}
参考 ASP.NET Core中的配置 >
I want to use ConfigurationBuidler
to read my appsettings.json
file. I cant see what I am doing wrong.
My file is
{
"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"
}
My test fails
[TestMethod]
public void TestMethod1()
{
var configuration = Helper.LoadConfiguration("appsettings.json");
Assert.IsTrue(configuration.Properties.Keys.Contains("col1Width")); // fails here
}
My helper class is
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]
I corrected the question title and updated the code as follows according to the Blog Post Marco pointed me to.
Only .Bind
is not available
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; }
}
Based on the shown settings file, there is no "FeedRead"
section
The settings would need to be read directly from the root.
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();
}
}
Reference Configuration in ASP.NET Core
Reference Options pattern in ASP.NET Core
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