C#, open excel file and apply a filter to retrive specific rows?

Question

issue : my code always return one row instead of 13.

Code:

Excel.Application xlApp = null;
Excel.Workbook xlWorkBook = null;
Excel.Worksheet xlWorkSheet = null;
Excel.Range xlrange = null;

string sCurrentDir = Directory.GetCurrentDirectory();

xlApp = new Excel.Application();

xlWorkBook = xlApp.Workbooks.Open(sCurrentDir + @"\Res\res.xlsx", 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, 0, true, 1, 0);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

xlrange = xlWorkSheet.UsedRange;       
xlrange.AutoFilter(5, "4", Excel.XlAutoFilterOperator.xlFilterValues, Type.Missing, true);

Excel.Range filteredRange = xlrange.SpecialCells(Excel.XlCellType.xlCellTypeVisible,    Excel.XlSpecialCellsValue.xlTextValues);

MessageBox.Show(filteredRange.Rows.Count.ToString());

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as you can see i want to Filter Column 5 With Value "4". it should returns 13 Rows but it always returns 1 row.

any help will appreciated

Answer 1

if you use xlApp.Visible = true; you can make the Excel application visible

I just ran your code and it seems to work as expected for my sample sheet

My sample Sheet

After I run your code, I see the filter being applied properly

Since you get 1 row it seems that the filter is not matching any rows and the row count of 1 may mean just the header row.

Few items to note are:

(1) The 5th Column is Column E (not Column F) i.e., Column A is the first column

(2) Cross check your data by manually adding the filter