SpreadsheetGear.ValidationType.List turn off

Question

I have a spreadsheetgear validation type list on one of the columns in a spreadsheet. The issue I have is when I reload the spreadsheet with different sets of data, I get an error that validation already exists. I don't know how to turn off the validation before reloading the new set of data. Please help.

Answer 1

If I understand the scenario correctly, you could either:

1) Use IValidation.Delete() to remove existing validation to the range prior to adding new validation.

worksheet.Cells["A:A"].Validation.Delete(); 
worksheet.Cells["A:A"].Validation.Add(...);

2) Instead of all out deleting the old one, modify the existing IRange.Validation object to fit your new data set. You would use IValidation.Modify(...) to do this.