Hi Jarne,

At the time of writing, I cannot suggest a specific approach to improve the loading performance of both controls during form initialization. The RadSpreadsheetRibbonBar is a feature-rich control, and during its loading process, each ribbon element is bound to the corresponding functionality of the RadSpreadsheet control. This initialization sequence takes additional time, which explains the observed delay.

That said, we do not consider the loading time to be outside the expected range for controls of this complexity. The development team is already aware of this behavior, and I will highlight this feedback once again and forward your observations to them.

In the meantime, I have played with the controls and I think I found a possible solution that you could consider. In general, the RadSpreadsheetRibbonBar is used to further customize the RadSpreadsheet control. When both controls are loaded and shown, the loading time takes 4 5 seconds. If we remove the ribbon and only show the RadSpreadsheet, the loading time is reduced to around 1 second. You can use this and add the ribbon only when needed by the end user.

For example, the ribbon will initially not be shown or added. You can expose a button(show RibbonBar). In the click event, you can set the ribbon properties and add it to the form. This way, the user will see the RadSpreadsheet control with the data faster. This scenario can be used when the end user loads a document and wants to see the data cells. In a few words, I am trying somehow to separate the loading process. I understand that this won't be the expected solution, but still, you could consider it.

Regards,
Dinko | Tech Support Engineer
Progress Telerik

Hi Matteo,

I am sorry to hear that our control does not meet your expectations. Indeed, RadSpreadsheet with the combination of RadSpreadsheetRibbonBar is significantly reducing the loading time of the form. When both controls are connected their initial synchronization requires some time due to the large number of functionalities of the RadSpreadsheet control. This is what should be improved. Currently, the possible solution that I can suggest is to use the splash screen options that the Telerik UI for WinForms suite offers: https://docs.telerik.com/devtools/winforms/controls/splashscreens/splashscreen/overview This is suitable for proper indication of long-lasting operations.

In your post, you also share that the editing operation is slow in your application. Would it be possible to share more information here? How you are editing? You are editing multiple cells or only one? How many cells are populated in the currently edited document? Any additional information is highly appreciated. 

Regards,
Dinko | Tech Support Engineer
Progress Telerik

Hi, Ian,

We understand the importance and the impact of this item. However, it requires some major refactoring in the ribbon UI and how the UI is built and mapped to the associated RadSpreadsheet. This requires planning changes and prioritizing the items.

Make sure that you cast your vote for the item in order to increase its priority. The more votes an item gathers, the higher its priority becomes.

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik