Getting System.NullReferenceException: Object reference not set to an instance of an object. at XamlConversion.Parsers.ParserBase.GetTypeFromXName(XName xName)

[smithah]

Hi,

Using this source as a reference for converting the .xaml to c#, the xaml string given in the demo app works perfectly , but when i change the xaml string to any other xaml string as given below. Get the null reference error for XAML Type, is it related to dll files that are being loaded by default from GAC ?

Please let me know .

//
string xaml = @"<Activity mc:Ignorable=""sap sap2010"" x:Class=""DisplayMessage_Chash"" sap2010:ExpressionActivityEditor.ExpressionActivityEditor=""C#"" sap:VirtualizedContainerService.HintSize=""721.6,610.4"" sap2010:WorkflowViewState.IdRef=""ActivityBuilder_1"" xmlns=""http://schemas.microsoft.com/netfx/2009/xaml/activities"" xmlns:mc=""http://schemas.openxmlformats.org/markup-compatibility/2006"" xmlns:sap=""http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation"" xmlns:sap2010=""http://schemas.microsoft.com/netfx/2010/xaml/activities/presentation"" xmlns:scg=""clr-namespace:System.Collections.Generic;assembly=System.Private.CoreLib"" xmlns:sco=""clr-namespace:System.Collections.ObjectModel;assembly=System.Private.CoreLib"" xmlns:ui=""http://schemas.uipath.com/workflow/activities"" xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"">
<TextExpression.NamespacesForImplementation>
<sco:Collection x:TypeArguments=""x:String"">
<x:String>System.Activities</x:String>
<x:String>System.Activities.Statements</x:String>
<x:String>System.Activities.Expressions</x:String>
<x:String>System.Activities.Validation</x:String>
<x:String>System.Activities.XamlIntegration</x:String>
<x:String>Microsoft.VisualBasic</x:String>
<x:String>Microsoft.VisualBasic.Activities</x:String>
<x:String>System</x:String>
<x:String>System.Collections</x:String>
<x:String>System.Collections.Generic</x:String>
<x:String>System.Data</x:String>
<x:String>System.Diagnostics</x:String>
<x:String>System.Linq</x:String>
<x:String>System.Net.Mail</x:String>
<x:String>System.Xml</x:String>
<x:String>System.Text</x:String>
<x:String>System.Xml.Linq</x:String>
<x:String>UiPath.Core</x:String>
<x:String>UiPath.Core.Activities</x:String>
<x:String>System.Windows.Markup</x:String>
<x:String>GlobalVariablesNamespace</x:String>
<x:String>GlobalConstantsNamespace</x:String>
<x:String>System.Linq.Expressions</x:String>
</sco:Collection>
</TextExpression.NamespacesForImplementation>
<TextExpression.ReferencesForImplementation>
<scg:List x:TypeArguments=""AssemblyReference"" Capacity=""22"">
Microsoft.CSharp
System
System.Core
System.Activities
System.Data
System.Runtime.Serialization
System.ServiceModel
System.ServiceModel.Activities
System.Xaml
System.Activities
Microsoft.VisualBasic
System.Private.CoreLib
System.Data
System
System.Core
System.Xml
System.Xml.Linq
System.Xaml
UiPath.System.Activities
UiPath.UiAutomation.Activities
UiPath.Studio.Constants
</scg:List>
</TextExpression.ReferencesForImplementation>
<Sequence DisplayName=""DisplayMessage_Chash"" sap:VirtualizedContainerService.HintSize=""400,175.2"" sap2010:WorkflowViewState.IdRef=""Sequence_1"">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments=""x:String, x:Object"">
<x:Boolean x:Key=""IsExpanded"">True</x:Boolean>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<ui:MessageBox Caption=""{x:Null}"" ChosenButton=""{x:Null}"" AutoCloseAfter=""00:00:00"" DisplayName=""Message Box"" sap:VirtualizedContainerService.HintSize=""356.8,85.6"" sap2010:WorkflowViewState.IdRef=""MessageBox_1"">
ui:MessageBox.Text
<InArgument x:TypeArguments=""x:Object"">
<CSharpValue x:TypeArguments=""x:Object"" sap2010:WorkflowViewState.IdRef=""CSharpValue`1_1"">""Test Message""

</ui:MessageBox.Text>
</ui:MessageBox>

";
////

[smithah]

Able to sucessfully convert the xaml string in demo given in the code with the attached image, but if i replace it with any other xaml string it throws null XAML type reference.