Hi everyone,
I’m practicing LINQ in UiPath Studio, but I’m not getting auto-suggestions/IntelliSense for LINQ methods like Where, Select, GroupBy, and FirstOrDefault.
For example, after:
DT.AsEnumerable().
I don’t see any LINQ method suggestions.
I have already imported System.Linq. Is there any setting, package, or configuration required to enable LINQ IntelliSense in UiPath Studio?
Thanks!
Sometimes the autosuggestion is disturbed. However it is recommended to force type a working statement to test if the LINQ expression is accepted. Example: myDataTableVar.AsEnumerable().First()
For further analysis we also recommend:
Which programming languguage is set for the project VB.Net or C#?
Also have a look here:
https://forum.uipath.com/t/howto-linq-vb-net-learning-catalogue
Hi @anwar_sd,
That UiPath editor’s IntelliSense engine struggles with generic extension methods like Where<T>, Select<T>, FirstOrDefault<T>, GroupBy<T>, because it can’t resolve the generic type parameter T at design time from DT.AsEnumerable() (which returns IEnumerable(Of DataRow)). Non-generic methods and instance methods usually still autocomplete fine but it’s specifically generic LINQ extension methods that get dropped.
Importing “System.Linq” doesn’t fix this as it’s not an import/reference problem, it’s an IntelliSense resolution problem.
Cheers!
Hi @anwar_sd
importing System.Linq is enough; there is no separate setting or package required.
If IntelliSense is not showing Where, Select, etc. after DT.AsEnumerable(), make sure the DataTable variable is actually typed as System.Data.DataTable and that you are using a VB expression.
You can also try closing and reopening UiPath Studio, as IntelliSense sometimes doesn’t refresh properly.
For example:
DT.AsEnumerable().Where(Function(row) row(“ColumnName”).ToString = “Value”)
If the LINQ runs successfully but suggestions are missing, it is most likely just an IntelliSense issue rather than a LINQ configuration problem.
Hi @anwar_sd
This looks like an IntelliSense/autocomplete issue rather than a LINQ functionality issue.
Please try the following:
You can also test with a simple expression such as:
DT.AsEnumerable().Where(Function(row) row(“Name”).ToString.Trim <> “”).ToList()
If the expression executes successfully but IntelliSense still doesn’t show Where, Select, GroupBy, etc., then it is most likely an IntelliSense/cache issue in Studio.
Hope this helps!
This syntax of LINQ is method syntax.
Try to install the latest Studio version and check in different activities like Assign, Invoke Code (marking the language as VB.net)
Make sure the namespace System.Linq is present in the ‘Import’ section.
Hi @anwar_sd ,
You can try these steps:
System.Linq is added under Imports.Thanks
Hi @anwar_sd
If System.Linq is already imported, you can try the following:
Make sure your project is using a compatible Windows/Windows-Legacy project type and the required System package is installed.
Confirm that DT is actually a DataTable.
Try using DT.AsEnumerable().Where(...) directly in an expression to check whether LINQ works even if IntelliSense suggestions are not displayed.
Restart UiPath Studio and rebuild the project, as IntelliSense can sometimes fail to refresh.
Check Studio → Settings → Design → IntelliSense and make sure IntelliSense/code completion is enabled.
For example:
DT.AsEnumerable().Where(Function(row) row("Status").ToString = "Success").ToList()
If the expression works but the suggestions are still missing, it is likely an IntelliSense/UI issue rather than a LINQ configuration problem.
Thank you for the suggestions. I have checked all the points mentioned.
However, I could not find any specific IntelliSense option or setting in UiPath Studio to enable or configure LINQ autosuggestions. Could you please confirm whether such an option is available in UiPath Studio, or if IntelliSense is expected to work automatically?
Thank you for your guidance.
Thank you for the clarification. I have already verified the DataTable type, System.Linq import, and VB expressions.
I have also tried restarting Studio and the machine, creating a fresh project, updating dependencies, rebuilding the project, and even uninstalling and reinstalling UiPath Studio.
The LINQ expressions work correctly when entered manually, but IntelliSense still does not show suggestions like Where and Select.
Could you please advise if there is any further troubleshooting I can try?
Thank you for your support.
Hi @anwar_sd,
Since the LINQ expressions work correctly when entered manually, it seems the issue is limited to IntelliSense.
At this point, I would check whether IntelliSense works for other .NET methods as well. If it doesn’t, it may be an issue with the VB expression editor rather than LINQ.
Also, could you share your UiPath Studio version and project type/target framework? That would help narrow down whether this is version-specific.
There is no additional LINQ package or setting required for Where, Select, etc. to work.
Please let us know the following:
and confirm that you have started on a fresh project, only 1 xaml for a minimal analysis purpose.
Whenever there is still a problem with intellisense / auto suggestion:
if it is not showing the suggestion (we assume: Project compatibility is set to Windows):
<x:String>System.Linq</x:String><x:String>System.Linq.Expressions</x:String><AssemblyReference>System.Linq</AssemblyReference><AssemblyReference>System.Linq.Expressions</AssemblyReference><AssemblyReference>System.Data.Common</AssemblyReference>Fee free to share with us the analysis XAML
Hi @anwar_sd
Thanks for the detailed troubleshooting steps.
I checked the points mentioned. I’ll verify the exact Studio version, project language, and UiPath.System.Activities package version, and also try Ctrl + Space and the XAML reference checks in a fresh project.
I’ll share the analysis XAML and the version details if the issue still persists.