Add customized JSON Formmter in appsettings.json

[XuefanWu]

I created a customized JSON Formatter which extends ITextFormatter
And try to add it to appsetting.json like this:
"WriteTo": [
{
"Name": "Console",
"Args": {
"formatter": "CustomizedJSONFormatter"
// "formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog"
}
},

The default jsonFormatter works fine as shown in the commented line.
But I will get an error if I want to add the customized one:
InvalidCastException: Invalid cast from 'System.String' to 'Serilog.Formatting.ITextFormatter'.

Is there anyway to solve this?

Thanks!

[tsimbalar]

You need to put in a full type name (the equivalent of typeof(CustomizedJSONFormatter).FullName ).

It must contain the type name and the full namespace before it.

For example : typeof(Serilog.Log).FullName -> "Serilog.Log".

Here is an example in the test suite :

https://github.com/serilog/serilog/blob/3cd376c8c75ed49ab307c50cd80beaa06cbaecb7/test/Serilog.Tests/Settings/SettingValueConversionsTests.cs#L48-L51

[XuefanWu]

Yes. I have tried in that way too, I add the full namespace and everything. But it cause the same error.

[tsimbalar]

Ooops, my bad, I gave you a link to the core Serilog repo ...

The behavior seems to be slightly different in in Serilog.Settings.Configuration, the one used for appsettings.json as I can see from this test.

From this test, I see you need to provide the full *Assembly qualified name, which should be something like this :

> typeof(Serilog.Log).AssemblyQualifiedName
"Serilog.Log, Serilog, Version=2.0.0.0, Culture=neutral, PublicKeyToken=24c2f752a8e58a10"

From MSDN :

The assembly-qualified name of a type consists of the type name, including its namespace, followed by a comma, followed by the display name of the assembly. The display name of an assembly is obtained using the Assembly.FullName property.

I'm not sure Version, Culture and PublicKeyToken are really required though.

[XuefanWu]

With the full Assembly qualified name, it works great now.
Thanks!!

[tsimbalar]

I'll close the issue :)