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If you would like to prevent the user from modifying the contents of sheets, you can use worksheet protection. You will be able to find information about the feature in the Worksheet Protection
article in our online documentation. Additionally, if you do not want to allow the user to add, remove and rename sheets, you can use workbook protection
When the user attempts to change the value of a protected cell, a warning message pops up. If you would like to get rid of that message, you need to download the latest LIB where the RadSpreadsheet class contains a MessageShowing event. This event allows you to modify or suppress all messages displayed to the user. The following snippet hides only alerts related to protection:
sender, MessageShowingEventArgs e)
protectionError = LocalizationManager.GetString(
I hope you find my answer useful. Let me know if you have further questions.
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