Attributevalue AMPscript function is not working as expected

Question

as per the detailed explanation of question and answer in this post. I am still not able to set value in cloudpages using AttributeValue AMPscript function

We can use AttributeValue AMPscript function to set value for any Attribute from sendable Data extension but I am not able to set value in cloudpages, below are the details

// Data Extension - Sendable, Id relates to subscriber on Subscriber Key //

Id	Fname	Lname	EmailAddress
123	Jon	Lee	JonTest@gmail.com
124	David	Ray	DavidTest@gmail.com
125	Jay	Ray	JayTest@gmail.com

// Code in Email //

Hi %%Fname%% <br><br>

please click on below link to check your Id

<'a href ="%%=RedirectTo(cloudpagesURL(145142))=%%"> Link </a'>    

// Code in Cloudpage - ID - 145142 //

%%[

var @Id

set @Id = AttributeValue('Id')

]%%

<p>
  Dear Customer, <br>
  you ID is = %%=v(@Id)=%%
</p>

// Output on web browser //

It is printing blank:

Dear Customer,
  you ID is =

Answer 1

There are some subtle differences between the functions to pass values from an email to a CloudPage.

NOTE: Be sure and test this functionality from your inbox. CloudpageURL doesn't pass context properly from send-preview.

If I use the following link to test the methods for passing parameter values -- where field1 and OTP are columns in my sending data extension containing the values whee! and ABCD1234 respectively:

<a href="%%=redirectto(
              concat(
                  CloudPagesURL(12345,
                      'value1', field1, 
                      'value2', AttributeValue('field1')
                    ),'&value3=',field1))=%%">cloudpagesurl</a>

And in my CloudPage:

value1 - naked personalization string
<br>AttributeValue: %%=AttributeValue("value1")=%%
<br>RequestParameter: %%=RequestParameter("value1")=%%
<br>QueryParameter: %%=QueryParameter("value1")=%%

<br><br>value2 - attributevalue
<br>AttributeValue: %%=AttributeValue("value2")=%%
<br>RequestParameter: %%=RequestParameter("value2")=%%
<br>QueryParameter: %%=QueryParameter("value2")=%%

<br><br>value3 - concat append
<br>AttributeValue: %%=AttributeValue("value3")=%%
<br>RequestParameter: %%=RequestParameter("value3")=%%
<br>QueryParameter: %%=QueryParameter("value3")=%%

<br><br>OTP - not explicitly passed
<br>AttributeValue: %%=AttributeValue("OTP")=%%
<br>RequestParameter: %%=RequestParameter("OTP")=%%
<br>QueryParameter: %%=QueryParameter("OTP")=%%

I get this output when I click on the link from my inbox:

value1 - naked personalization string
AttributeValue:
RequestParameter: whee!
QueryParameter: whee!

value2 - attributevalue
AttributeValue: False
RequestParameter: whee!
QueryParameter: whee!

value3 - concat append
AttributeValue:
RequestParameter: whee!
QueryParameter: whee!

OTP - not explicitly passed
AttributeValue: ABCD1234
RequestParameter:
QueryParameter:

Observations:

• value1: AttributeValue is empty since I'm not referencing the sending DE column name, but the parameter name. RequestParameter and QueryParameter have the same behavior.
• value2: AttributeValue is False since I'm not referencing the sending DE column name, but the parameter name is set with AttributeValue in the email. RequestParameter and QueryParameter have the same behavior.
• value3: AttributeValue is empty since I'm not referencing the sending DE column name, but the parameter name. RequestParameter and QueryParameter have the same behavior.
• OTP: You don't actually explicitly pass parameters in the CloudPagesURL function if they're part of your send context. They'll show up automatically and can be referenced using AttributeValue.

Key takeaway:

• Save some typing in your email, just retrieve the contextual values using AttributeValue.

Reference:

• AttributeValue
• RequestParameter
• QueryParameter
• CloudPagesURL