CODEWITHSUNDEEP
xamarin.iosservicestack
t9mike
t9mike

Reputation: 1626

Error serializing with ServiceStack JSON on MonoTouch

I am experimenting with ServiceStack's JSON engine. I grabbed the MonoTouch binary build, v2.20. Works fine from simulator, but from the iOS device (iPad2, iOS5) I get an exception thrown by the type initializer for JsonWriter (and not much other than that). I am using MonoTouch 5, MonoDevelop 2.8.1, and targeting iOS 5. I have disabled library linking because I am getting an error when enabled.

I created a sample and uploaded to https://github.com/t9mike/ServiceStack-JSON1.

I'm trying to determine whether the issue is my compilation options, Service Stack, or MonoTouch. Thanks in advance.

Upvotes: 2

Views: 893

Answers (2)

t9mike
t9mike

Reputation: 1626

I ended up grabbing the ServiceStack.Text sources from GitHub, version 3.0.3. I created a new MonoTouch library project. I had to tweak ServiceStack.Text/JsConfig.cs slightly to conditionalize away the System.Drawing.Color bits. I'll send a patch and MT csproj to the authors.

After using this new assembly, my sample MT app ran fine on the device. I have updated my sample at https://github.com/t9mike/ServiceStack-JSON1 with the new ServiceStack.Text dll.

Upvotes: 0

poupou
poupou

Reputation: 43553

A quick partial answer that might help:

I have disabled library linking because I am getting an error when enabled.

The current (5.0) managed linker can eliminate some unused (from a static analysis point of view) code from your application. This generally occurs when using Link all option, i.e. where user code gets processed by the linker.

One alternative is using the Link SDK assemblies only that won't touch the user code (only the code shipped with MonoTouch itself will be processed by the linker).

Another alternative is adding [Preserve] attributes on your code to ensure the serializer requirements are still met after the linker has processed your code. More information about the linker and [Preserve] attributes can be found here.

The next (5.2) release of MonoTouch will include a bit more sophisticated step in the linker to ensure the basic XML serialization and DataContract requirements are not broken. Not sure if this will solve this specific case (ServiceStack JSON) but I'll have a look into it.

As for the rest of your question I'll try to build this myself and duplicate your issue.

Upvotes: 1

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