xamarin.forms - Spire.Doc gives System.ArgumentNullException when instantiating a new object

Question

I'm using FreeSpire from nuget in my Xamarin.Forms app to convert an RTF file to HTML (RTFPipe can't parse the file correctly).

I'm using the line

var doc = new Document();

to create an empty document. However, when the debugger hits that line, the following exception is thrown

System.ArgumentNullException: 'Value cannot be null. Parameter name: path1

The stacktrace shows the following

at System.IO.Path.Combine (System.String path1, System.String path2) [0x00003] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.IO/Path.cs:102 at Spire.License.LicenseProvider.? (System.Type A_0) [0x00b04] in <cbf4d19d91bc48bebfd56cc173b03744>:0 at Spire.License.LicenseProvider.? (System.Type A_0) [0x000eb] in <cbf4d19d91bc48bebfd56cc173b03744>:0 at Spire.License.LicenseProvider.GetLicense (System.ComponentModel.LicenseContext context, System.Type type, System.Object instance, System.Boolean allowExceptions) [0x0013c] in <cbf4d19d91bc48bebfd56cc173b03744>:0 at System.ComponentModel.LicenseManager.ValidateInternalRecursive (System.ComponentModel.LicenseContext context, System.Type type, System.Object instance, System.Boolean allowExceptions, System.ComponentModel.License& license, System.String& licenseKey) [0x0005d] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.ComponentModel.TypeConverter/src/System/ComponentModel/LicenseManager.cs:316 at System.ComponentModel.LicenseManager.ValidateInternal (System.Type type, System.Object instance, System.Boolean allowExceptions, System.ComponentModel.License& license) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.ComponentModel.TypeConverter/src/System/ComponentModel/LicenseManager.cs:276 at System.ComponentModel.LicenseManager.IsValid (System.Type type, System.Object instance, System.ComponentModel.License& license) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.ComponentModel.TypeConverter/src/System/ComponentModel/LicenseManager.cs:236 at Spire.Doc.Document.? () [0x00083] in <cadd5a62e86a41f7af17954bf73d8f6c>:0 at Spire.Doc.Document..ctor () [0x000d7] in <cadd5a62e86a41f7af17954bf73d8f6c>:0 at Quizical.Droid.Injected.RTFConvert.ConvertRTF (System.String storage, System.String filename) [0x0000b] in C:UsersPaulsource eposceditacorporateQuizicalQuizicalQuizical.AndroidInjectedRTFConvert.cs:14 at Quizical.ViewModels.UIElementsViewModel.<.ctor>b__2_1 (System.String t) [0x00020] in C:UsersPaulsource eposceditacorporateQuizicalQuizicalQuizicalViewModelsUIElementsViewModel.cs:54 at (wrapper managed-to-native) System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo,object,object[],System.Exception&) at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0006a] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:395

My understanding is that Freespire doesn't need a licence which the stacktrace suggests is missing.

question from:https://stackoverflow.com/questions/65598928/spire-doc-gives-system-argumentnullexception-when-instantiating-a-new-object

Answer 1

Waitting for answers