As of R1 2018 the GetCellContent method is no longer used for exporting a custom column content. Instead, the GetExportCellContent one of GridViewBoundColumnBase needs to be overriden.

Available in LIB version 2018.1.205, it will be also available in the R1 2018 SP2 Release.

A TargetName = "FilterIcon" should be added to the foreground setter in the trigger in the control template of the FilteringDropDown.

Hello

Good job with the Fluent theme! I'm using the core styles with validation in my GridViews and have noticed that the bottom border is not/barely visible in invalid grid cells (see attached screenshot).

I can fix this by taking a copy of GridViewCellCoreValidationTemplate and adding Margin="0 0 0 1" to Background_Invalid.

Cheers
Jack

Placing text in quotes after exclude search operator and search getting the wrong result. As a workaround to get the desired result the search string can be changed in this way: from  -"Rio de" to  -Rio + -de.

To work this around set the GroupRenderMode property of RadGridView to Flat.

When GroupRenderMode is set to Nested the issue can be overcome by calling the BringIntoView method on the row returned in the ScrollIntoViewAsync method's callback:  
gridView.ScrollIndexIntoViewAsync(index,
  new Action<FrameworkElement>((f) =>
  {
      f.BringIntoView();
  }));

If you set BorderThickness through a custom CellStyle, the left border is overwritten by our code. 

Using such negative margin leads to some parts of the template to be actually outside of the control boundaries.