Using C# to sort a column in Excel

Question

I am trying to sort a worksheet by the first column in excel using INTEROP.

I just want a simple sort of the entire range by the first column. I am doin

Answer 1

In order to sort a range by a single column in that range, you can do something like the following (if you are using VS 2010 and above with the "dynamic" keyword):

dynamic allDataRange = worksheet.UsedRange;
allDataRange.Sort(allDataRange.Columns[7], Excel.XlSortOrder.xlDescending);

In my example, I had a spreadsheet with 10 or so columns, and I wanted to sort the entire spreadsheet by the 7th column, in descending order.

I was helped by the above answer, but when I tried Code4Life's snippet:

dynamic valueRange = GetTheRange();
valueRange.Columns.get_Item(1)).Sort(valueRange.Columns[1]);

it only sorted the first column of the range. The OP asked for sorting an entire range by one column, not sorting one column in a range. So after a little trial and error I got my above simplified code.