How to Freeze Top Row and Apply Filter in Excel Automation with C#

Question

I have automation to create an Excel document from C#. I am trying to freeze the top row of my worksheet and apply filter. This is the same as in Excel 2010 if you select View >

Answer 1

//path were excel file is kept string ResultsFilePath = @"C:\Users\krakhil\Desktop\FolderName\FileNameWithoutExtension";

        Excel.Application ExcelApp = new Excel.Application();
        Excel.Workbook ExcelWorkbook = ExcelApp.Workbooks.Open(ResultsFilePath);
        ExcelApp.Visible = true;

        //Looping through all available sheets
        foreach (Excel.Worksheet ExcelWorksheet in ExcelWorkbook.Sheets)
        {                
            //Selecting the worksheet where we want to perform action
            ExcelWorksheet.Select(Type.Missing);

            //Making sure first row is selected - else split and freeze will happen
            //On the visible part and not from the top
            Excel.Range activeCell = ExcelWorksheet.Cells[1, 1];
            activeCell.Select();

            //Applying auto filter to Row 10
            activeCell = (Excel.Range)ExcelWorksheet.Rows[10];
            activeCell.AutoFilter(1,
                Type.Missing,
                Excel.XlAutoFilterOperator.xlAnd,
                Type.Missing,
                true);

            //Split the pane and freeze it
            ExcelWorksheet.Application.ActiveWindow.SplitRow = 10;
            ExcelWorksheet.Application.ActiveWindow.FreezePanes = true;

            //Auto fit all columns
            ExcelWorksheet.Columns.AutoFit();

            //Releasing range object
            Marshal.FinalReleaseComObject(activeCell);
        }

        //saving excel file using Interop
        ExcelWorkbook.Save();

        //closing file and releasing resources
        ExcelWorkbook.Close(Type.Missing, Type.Missing, Type.Missing);
        Marshal.FinalReleaseComObject(ExcelWorkbook);
        ExcelApp.Quit();
        Marshal.FinalReleaseComObject(ExcelApp);