You can always use String concatenation operator (+) for your requirement. Please check the below provided source code and attached output spreadsheet for you reference.
C#
//Instantiating a Workbook object
Workbook workbook = new Workbook(); //Obtaining the reference of the first worksheet by //passing its sheet index
Worksheet worksheet = workbook.Worksheets[0]; //Insert some text in a cell
worksheet.Cells[0, 1].PutValue(“Hello”); //Reterieve the inserted text stringvalue = worksheet.Cells[0, 1].StringValue; //Append another text to existing text value += " Aspose"; //Set the new modified text to the cell
worksheet.Cells[0, 1].PutValue(value); //Save workbook
workbook.Save(myDir + “output.xlsx”);
Similarly like above, Can we add a Text in a cell which already has some number value (coming as data from database).
For ex:
if a cell contains 785887 , can we make it like this 785887SOS.