Hi Salih,
You can achieve your requirement by directly access the HasString property in worksheet range by using the row and column index as shown in the following code snippet.
[Sample Code][C#]
IWorksheet worksheet = spreadSheetControl.ExcelProperties.WorkBook.Worksheets[spreadSheetControl.GridProperties.CurrentSheetName];
IRange range = worksheet.Range[RowIndex, ColumnIndex];
bool Result = range.HasString;
For more information please refer the attached sample and video.
Please let us know if you have any queries.
Regards,
Ponraja
Spreadsheet_2a8d6308.zip