I have the Base URL within the appsettings.json like below
"RM": {
"BaseAddress": "https://rm-dev.abc.org/"
},
With in the Class where I am trying to make a call this endpoint
public class InventorySearchLogic
{
private readonly SMContext _context;
private readonly IConfiguration _iconfiguration;
public InventorySearchLogic(SMContext context, IConfiguration iconfiguration)
{
_context = context;
_iconfiguration = iconfiguration;
}
public InventorySearchLogic(SMContext context)
{
}
public async Task<string> GetRoomID(string roomName)
{
//string rmID = "";
using (var client = new HttpClient())
{
RmRoom retRoom = new RmRoom();
client.BaseAddress = new Uri(_iconfiguration.GetSection("RM").GetSection("BaseAddress").Value);
client.DefaultRequestHeaders.Accept.Clear();
When debugging it throws error like System.NullReferenceException: Message=Object reference not set to an instance of an object.
how to access the base URL from appsettings.json
I am not sure how to use the ConfigurationBuilder()
as I have different apSettings.json file one for each environment like appsettings.Development.json
, appsettings.QA.json
, appsettings.PROD.json
Below is my Startup
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
.AddMicrosoftIdentityWebApp(Configuration.GetSection("AzureAd"));
services.AddControllersWithViews();
services.AddSession();
services.AddMemoryCache();
services.AddDbContextPool<SurplusMouseContext>(options =>
{
options.UseSqlServer(Configuration.GetConnectionString("SMConnectionStrings"),
sqlServerOptionsAction: sqlOptions =>
{
sqlOptions.EnableRetryOnFailure();
});
});
services.AddHttpContextAccessor();
services.AddControllersWithViews(options =>
{
var policy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
options.Filters.Add(new AuthorizeFilter(policy));
});
services.AddRazorPages()
.AddMicrosoftIdentityUI();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseSession();
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Customers}/{action=Index}/{id?}");
});
}
}
CodePudding user response:
You're already injecting an IConfiguration
in your service and saving it as _iconfiguration
. Assuming that's not the null value, then simply use .GetValue
to retrieve a value.
string baseAddress = _iconfiguration.GetSection("RM").GetValue<string>("BaseAddress");
Read more about ASP.Net configuration
CodePudding user response:
If your setting is in application settings, you can access it with the following: Properties.Settings.Default.{yourVariableName}