After we just upgraded to 2021 SP, we are now getting several System.ArgumentExceptions when executing the following call to LoadPackageResource:
Assembly assembly = Assembly.LoadFrom("STEAM.Common.dll");
ThemeResolutionService.LoadPackageResource(assembly, "STEAM.Common.SpotlightOffice2013Light.tssp");The errors are:
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.Docking.DockingGuidesElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.Docking.DockingGuidesElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.GridTableElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.GridTableElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.GridSearchCellElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.GridSearchCellElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.RadPivotGridElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.RadPivotGridElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.SchedulerMonthViewElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.SchedulerMonthViewElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.RadSpreadsheetElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.RadSpreadsheetElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.RadSpreadsheetElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.RadSpreadsheetElement
Exception thrown: 'System.ArgumentException' in Telerik.WinControls.dll
Type not found: Telerik.WinControls.UI.VirtualGridTableElement. Please make sure you have reference to an assembly which contains type: Telerik.WinControls.UI.VirtualGridTableElement
Hi, Ken,
As of R1 2021 we have functionality for using Fluent theme as default: https://docs.telerik.com/devtools/winforms/styling-and-appearance/default-theme#fluent-theme-as-default
This required the following change in our source code:
The Fluent theme is now a part of the Telerik.WinControls assembly and it is statically available everywhere just like the ControlDefault theme. As a result, it is no longer necessary to instantiate the FluentTheme type.
However, when loading the theme, several property settings throw handled exceptions. This will also be observed if you try loading the Fluent theme.
I understand that this may affect the initial load time in your project. That is why the possible solution that I can suggest is to force loading the types of the respective controls:
public Form1()
{
InitializeComponent();
new RadDock();
new RadGridView();
new RadPivotGrid();
new RadScheduler();
new RadSpreadsheet();
Assembly assembly = Assembly.LoadFrom("STEAM.Common.dll");
ThemeResolutionService.LoadPackageResource(assembly, "STEAM.Common.SpotlightOffice2013Light.tssp");
pv.ThemeName = "SpotlightOffice2013Light";
ThemeResolutionService.AllowAnimations = false;
}We will do our best to handle this case in an appropriate manner. Please excuse us for the inconvenience caused.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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