378990: pdf export code modified

[AjithkumarGopalakrishnan]

Description

In the PDF export section, we have a topic Show or hide columns on exported PDF. However, when following the code given in that section, columns are not hidden. Need to modify that section with the below approach in all platforms.

Areas affected and ensured

None

Test cases

NA

Test bed sample location

NA

Additional checklist

• Did you run the automation against your implementation? NA
• Is there any API name change? NA.
• Is there any existing behavior change of other features due to this code change? No
• Does your new code introduce new warnings or binding errors? No
• Does your code pass all FxCop and StyleCop rules? No
• Did you record this case in the unit test or UI test? No

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 378990-Export

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 378990-Export
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
Front matter Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0