How to remove columns from web part view on a page

The code locates a landing page and search for web part called "Shared Documents". If page is not checked out, it checks out the page and delete "Version" column web part view (_UIVersionString)

private void UpdateViewOfWebpart(SPSite createdSite)

        {

            //// Sets the page url where the webpart is located

            string pageUrl = createdSite.RootWeb.RootFolder.WelcomePage;

            string targetwebpartTitle = "Shared Documents";

            //// Elevating permission

            SPSecurity.RunWithElevatedPrivileges(() =>

            {

                //// Creates a new SPSite instance for the sharepoint website

                using (SPSite spsite = new SPSite(createdSite.Url))

                {

                    //// Opens the SPWeb instance based on which the SPSite was initiated

                    using (SPWeb spweb = spsite.OpenWeb())

                    {

                        /// Gets the page SPFile object

                        SPFile pageSPFile = spweb.GetFile(pageUrl);

                        try

                        {

                            //// If file is not checked out then do a check out

                            if (pageSPFile.Level != SPFileLevel.Checkout)

                            {

                                pageSPFile.CheckOut();

                            }

                            //// Gets the SPLimitedWebpartManager instance from the page

                            SPLimitedWebPartManager limitedWebpartManager = pageSPFile.GetLimitedWebPartManager(System.Web.UI.WebControls.WebParts.PersonalizationScope.Shared);

                            //// A temp value to use inside the following for loop

                            string currentWebpartTitle = string.Empty;

                            foreach (System.Web.UI.WebControls.WebParts.WebPart webPart in limitedWebpartManager.WebParts)

                            {

                                //// Ignore the closed webpart

                                if (!webPart.IsClosed)

                                {

                                    //// Reads the webpart title in the iterated loop

                                    currentWebpartTitle = webPart == null ? string.Empty : (webPart.Title == null ? string.Empty : webPart.Title);

                                    //// Checks whether current webpart title in iterated loop is the targeted webpart or not

                                    if (currentWebpartTitle == targetwebpartTitle)

                                    {

                                        //// With the help of reflection gets the View field’s info

                                        System.Reflection.FieldInfo viewFieldInfo = webPart.GetType().GetField("view", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

                                        //// Ignore and continue loop if view field is null

                                        if (viewFieldInfo == null)

                                        {

                                            continue;

                                        }

                                        //// Cast the view field’s value which was retrieved using reflection to the SPView

                                        SPView view = viewFieldInfo.GetValue(webPart) as SPView;

                                        if (view.ViewFields.Exists("_UIVersionString"))

                                            view.ViewFields.Delete("_UIVersionString");

                                        /// Updates the view

                                        view.Update();

                                        //// This is optional, need not have to save changes to webpart, but just to confirm

                                        limitedWebpartManager.SaveChanges(webPart);

                                        break;

                                    }

                                }

                            }

                        }

                        catch (Exception ex)

                        {

                            throw ex;

                        }

                        finally

                        {

                            if (pageSPFile.Level == SPFileLevel.Checkout)

                            {

                                pageSPFile.CheckIn("Removed Version column", SPCheckinType.MajorCheckIn);

                            }

                        }

                    }

                }

            });

        }

PowerShell script does the same

$deleteField = "_UIVersionString"

$whereToLook = "Shared Documents"

function HasPageWebPartField()

{

      param

      (

      [Microsoft.SharePoint.SPFile]$Page,

      [Microsoft.SharePoint.SPWeb]$Web

      )          

     

      $localWebVariable = Get-SPWeb -Identity $web.Url     

    $checkWpm = $localWebVariable.GetLimitedWebPartManager($page.Url, [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)

      $checkWp = $checkWpm.WebParts | Where-Object { $_.Title -eq $whereToLook }

      $checkList = $localWebVariable.Lists | Where-Object { $_.Title -eq $whereToLook }

      if ($wp.ViewGUID -ne $null -and $wp.ViewGUID -ne "")

      {

            $checkView = $checkList.Views[[Guid]$checkWp.ViewGUID]

            $returnVal = $checkView.ViewFields.Exists($deleteField)

      }

      else

      {

            $returnVal = $false

      }

      $checkWpm.Dispose()

      $localWebVariable.Dispose()

      return $returnVal

}

$web = Get-SPWeb $_.URL

      

       if ([Microsoft.SharePoint.Publishing.PublishingWeb]::IsPublishingWeb($web))

       {

              [Microsoft.SharePoint.Publishing.PublishingWeb]$publishingWeb = [Microsoft.SharePoint.Publishing.PublishingWeb]::GetPublishingWeb($web)

              $page = $publishingWeb.DefaultPage

              if ($page.CheckedOutDate -eq $null)

              {

                     $hasField = HasPageWebPartField -Page $page -Web $web

                     if ($hasField)

                     {

                     $page.CheckOut()

                     $wpm = $web.GetLimitedWebPartManager($page.Url, [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)

                            $wp = $wpm.WebParts | Where-Object { $_.Title -eq $whereToLook }

                           $list = $web.Lists | Where-Object { $_.Title -eq $whereToLook }

                           $view = $list.Views[[Guid]$wp.ViewGUID]

                           $view.ViewFields.Delete($deleteField)

                           $view.Update()

                           $wpm.SaveChanges($wp)

                           $page.CheckIn("Removed Version column. Update via PowerShell",[Microsoft.SharePoint.SPCheckinType]::MajorCheckIn)

                     }

              }

              else

              {

                     $message = "Web " + $web.Url + " page " + $page.Name + " was checked out - to be processed manually."

                     Write-Host $message -ForegroundColor Red

                     $script:fileContents += ($message)

                     $script:fileContents += ("`r`n")

              }

       }

      $web.Close()