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Improved code for reading appsettings.json

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This commit is contained in:
Mark J Price 2023-06-29 08:12:32 +01:00
parent 8d7bba1aec
commit aa85155c03
2 changed files with 42 additions and 4 deletions
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23
vs4win/Chapter04/Instrumenting/Program.cs
View file

@ -1,6 +1,13 @@
using System.Diagnostics;
using System.Reflection;
using Microsoft.Extensions.Configuration;
Console.WriteLine("Warning! Versions 7.0.3xx and 7.0.4xx have bugs that cause an exception:");
Console.WriteLine("Microsoft.Extensions.Configuration.Binder version: {0}",
typeof(ConfigurationBinder).Assembly.GetCustomAttribute
<AssemblyFileVersionAttribute>()?.Version);
Console.WriteLine();
string logPath = Path.Combine(Environment.GetFolderPath(
Environment.SpecialFolder.DesktopDirectory), "log.txt");
@ -10,8 +17,8 @@ TextWriterTraceListener logFile = new(File.CreateText(logPath));
Trace.Listeners.Add(logFile);
// text writer is buffered, so this option calls
// Flush() on all listeners after writing
// Text writer is buffered, so this option calls
// Flush() on all listeners after writing.
Trace.AutoFlush = true;
Debug.WriteLine("Debug says, I am watching!");
@ -20,10 +27,18 @@ Trace.WriteLine("Trace says, I am watching!");
Console.WriteLine("Reading from appsettings.json in {0}",
arg0: Directory.GetCurrentDirectory());
Console.WriteLine();
Console.WriteLine("--appsettings.json contents--");
Console.WriteLine(File.ReadAllText(Path.Combine(
Directory.GetCurrentDirectory(), "appsettings.json")));
ConfigurationBuilder builder = new();
builder.SetBasePath(Directory.GetCurrentDirectory());
// Add the appsettings.json file to the processed configuration.
// Make reading this file mandatory so an exception will be thrown
// if the file is not found.
builder.AddJsonFile("appsettings.json",
optional: false, reloadOnChange: true);
@ -35,6 +50,9 @@ TraceSwitch ts = new(
configuration.GetSection("PacktSwitch").Bind(ts);
// Output the trace switch level from appsettings.json.
Console.WriteLine($"Trace switch level: {ts.Level}");
Trace.WriteLineIf(ts.TraceError, "Trace error");
Trace.WriteLineIf(ts.TraceWarning, "Trace warning");
Trace.WriteLineIf(ts.TraceInfo, "Trace information");
@ -43,4 +61,5 @@ Trace.WriteLineIf(ts.TraceVerbose, "Trace verbose");
int unitsInStock = 12;
LogSourceDetails(unitsInStock > 10);
Console.WriteLine("Press enter to exit.");
Console.ReadLine();

23
vscode/Chapter04/Instrumenting/Program.cs
View file

@ -1,6 +1,13 @@
using System.Diagnostics;
using System.Reflection;
using Microsoft.Extensions.Configuration;
Console.WriteLine("Warning! Versions 7.0.3xx and 7.0.4xx have bugs that cause an exception:");
Console.WriteLine("Microsoft.Extensions.Configuration.Binder version: {0}",
typeof(ConfigurationBinder).Assembly.GetCustomAttribute
<AssemblyFileVersionAttribute>()?.Version);
Console.WriteLine();
string logPath = Path.Combine(Environment.GetFolderPath(
Environment.SpecialFolder.DesktopDirectory), "log.txt");
@ -10,8 +17,8 @@ TextWriterTraceListener logFile = new(File.CreateText(logPath));
Trace.Listeners.Add(logFile);
// text writer is buffered, so this option calls
// Flush() on all listeners after writing
// Text writer is buffered, so this option calls
// Flush() on all listeners after writing.
Trace.AutoFlush = true;
Debug.WriteLine("Debug says, I am watching!");
@ -20,10 +27,18 @@ Trace.WriteLine("Trace says, I am watching!");
Console.WriteLine("Reading from appsettings.json in {0}",
arg0: Directory.GetCurrentDirectory());
Console.WriteLine();
Console.WriteLine("--appsettings.json contents--");
Console.WriteLine(File.ReadAllText(Path.Combine(
Directory.GetCurrentDirectory(), "appsettings.json")));
ConfigurationBuilder builder = new();
builder.SetBasePath(Directory.GetCurrentDirectory());
// Add the appsettings.json file to the processed configuration.
// Make reading this file mandatory so an exception will be thrown
// if the file is not found.
builder.AddJsonFile("appsettings.json",
optional: false, reloadOnChange: true);
@ -35,6 +50,9 @@ TraceSwitch ts = new(
configuration.GetSection("PacktSwitch").Bind(ts);
// Output the trace switch level from appsettings.json.
Console.WriteLine($"Trace switch level: {ts.Level}");
Trace.WriteLineIf(ts.TraceError, "Trace error");
Trace.WriteLineIf(ts.TraceWarning, "Trace warning");
Trace.WriteLineIf(ts.TraceInfo, "Trace information");
@ -43,4 +61,5 @@ Trace.WriteLineIf(ts.TraceVerbose, "Trace verbose");
int unitsInStock = 12;
LogSourceDetails(unitsInStock > 10);
Console.WriteLine("Press enter to exit.");
Console.ReadLine();