问题
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; }
}
回答1:
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
来源:https://stackoverflow.com/questions/59440111/how-can-i-bind-to-a-configuration-class-using-configurationbulder-in-net-core-3