TimeOnly is not read from appsettings

[wertzui]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Having an appsettings.json that looks like this

{
    "MyTime": "01:02"
}

When trying to bind this to a TimeOnly, the result is always an Exception (or 00:00 depending on how it is read), while the result is 01:02 when binding to a TimeSpan.

Expected Behavior

The value can be bound to a TimeOnly instance.

Steps To Reproduce

configuration.GetValue<TimeSpan>("MyTime"); // 01:02
configuration.GetValue<TimeOnly>("MyTime"); // System.NullReferenceException
configuration.GetSection("MyTime").Get<TimeOnly>(); // 00:00

Exceptions (if any)

It is a System.NullReferenceException

Stack trace for the Exception:

at System.Runtime.CompilerServices.CastHelpers.Unbox(Void* toTypeHnd, Object obj)
at Microsoft.Extensions.Configuration.ConfigurationBinder.GetValue[T](IConfiguration configuration, String key, T defaultValue)
at Microsoft.Extensions.Configuration.ConfigurationBinder.GetValue[T](IConfiguration configuration, String key)

.NET Version

6.0.200-preview.21617.4

Anything else?

No response

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Issue Details

---

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Having an appsettings.json that looks like this

{
    "MyTime": "01:02"
}

When trying to bind this to a TimeOnly, the result is always an Exception (or 00:00 depending on how it is read), while the result is 01:02 when binding to a TimeSpan.

Expected Behavior

The value can be bound to a TimeOnly instance.

Steps To Reproduce

configuration.GetValue<TimeSpan>("MyTime"); // 01:02
configuration.GetValue<TimeOnly>("MyTime"); // System.NullReferenceException
configuration.GetSection("MyTime").Get<TimeOnly>(); // 00:00

Exceptions (if any)

It is a System.NullReferenceException

Stack trace for the Exception:

at System.Runtime.CompilerServices.CastHelpers.Unbox(Void* toTypeHnd, Object obj)
at Microsoft.Extensions.Configuration.ConfigurationBinder.GetValue[T](IConfiguration configuration, String key, T defaultValue)
at Microsoft.Extensions.Configuration.ConfigurationBinder.GetValue[T](IConfiguration configuration, String key)

.NET Version

6.0.200-preview.21617.4

Anything else?

No response

Author:	wertzui
Assignees:	-
Labels:	untriaged, area-Extensions-Configuration
Milestone:	-

[tarekgh]

@wertzui Thanks for your report. This is a duplicate of #59253.