Cell Style Alignment on a range

Question

I'm having a problem fromatting cells in an excel sheet. For some reason my code seems to be changing the style of all cells when I just want to change the style of a few specified, or a specified range.

Here's some of the code that I am using:

app = new Microsoft.Office.Interop.Excel.Application(); workbook = app.Workbooks.Add(1); worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Sheets[1];  //Change all cells' alignment to center worksheet.Cells.Style.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;  //But then this line changes every cell style back to left alignment worksheet.Cells[y + 1, x + 2].Style.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft; 

Why would it change the style of multiple cells when I set it to just work on one? Is it not supposed to work how I want it to? Is there another way of doing this?

Answer 1

This works good

worksheet.get_Range("A1","A14").Cells.HorizontalAlignment =                   Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft; 

Answer 2

Based on this comment from the OP, "I found the problem. apparentlyworksheet.Cells[y + 1, x + 1].HorizontalAlignment", I believe the real explanation is that all the cells start off sharing the same Style object. So if you change that style object, it changes all the cells that use it. But if you just change the cell's alignment property directly, only that cell is affected.