Webclient Error

[devasaiprasad_K]

Hi Team,

what does this error mean and how we can fix it.

[ppr (Peter Preuss)]

Kindly note:

Taken from:

WebClient Class (System.Net)

So, when starting new use directly the HTTPClient for it

[devasaiprasad_K]

i am getting as below

should i select HTTPClientFactory for it, or should i add any components for HTTPClient method to appear.

[ppr (Peter Preuss)]

@devasaiprasad_K

HTTPClientFactory

was not mentioned by us as we mentioned HttpClient

HttpClient Class (System.Net.Http)

Let us know if your project is set to Windows - Legacy

[Anil_G (Anil Gorthi)]

@devasaiprasad_K

try the full namespace then you can find

System.Net.Http.HttpClient or System.Net.Webclient

cheers

[devasaiprasad_K]

i tried typing the namespaces but its not appearing…

[ppr (Peter Preuss)]

@devasaiprasad_K

namespaces but its not appearing

that’s why we asked

@ppr

Let us know if your project is set to Windows - Legacy

using legacy we would have to reference a package

Problems with Web activities - HttpClient

When working in Legacy on Level UiPath.System.Activities Version 20.4.X then When it is about the UiPath HttpRequest Activities then bring the different Packages UiPath.System.Activities, UiPath.UiAutomation.Activities, UiPath.WebApi.Activities to a same version level set and make them matching by up/downgrading For the case Microsoft.Net.HttpClient: Make the HttpClient available by using the Manage Dependencies / Packages and add [grafik]

Working within Windows Compatibility it should be available

[devasaiprasad_K]

Hi @ppr the current studio version i am using is 2023.12.0 and i am sure there is no option for windows-Legacy in the version.

[Anil_G (Anil Gorthi)]

@devasaiprasad_K

directly type it in your assign or wherever you are using

cheers

[devasaiprasad_K]

can you give me syntax of directly writing in the code.

[Anil_G (Anil Gorthi)]

@devasaiprasad_K

New System.Net.Http.HttpClient

cheers

[ppr (Peter Preuss)]

@devasaiprasad_K

there is no option for windows-Legacy in the version.

we had only asked, what is used at your end.

so import the namespace:

Try again to create a variable of type:

As a last resort:

• close all XAMLS
• take a backup from the XAML
• open it within a text editor (e.g. notepad++)
• Add manually the Assembly reference
  

 <AssemblyReference>System.Net.Http</AssemblyReference>

• Save an close (notepad++)
• click refresh
  
• open XAML and try again

[devasaiprasad_K]

i have followed the steps and some how i did not face any error while compiling but something like Invoke Method: Value cannot be null. (Parameter ‘TargetObject’)

what is still missing

[Anil_G (Anil Gorthi)]

@devasaiprasad_K

Target object is not intialized

cheers

[devasaiprasad_K]

Hii @ppr

i tried using HTTPClient but getting error ex: DownloadFile property

[ppr (Peter Preuss)]

Available methods from HTTPClient Class can be checked here:

HttpClient Class (System.Net.Http)

as most of the methods do have a return it can also be used within an Assign Activity

Also we would like to mention

Activities - Download file from URL

[devasaiprasad_K]

Thank you anil so much for clear Guidance