C# using Excel Interop Updating Formulas - c#

I have a C# application that builds Excel files from an existing template. On the template I want to have my row totals/averages in place and to update to however many rows are inserted by the application (Between the header and footer rows). This should be simple but I am drawing a blank in trying to remember how to do such a thing.

Excel should automatically update the ranges in the footer formulas providing that the footer formulas reference at least two rows and the insertion happens between those two rows.
updated to reflect suggestions from ewbi's comment below

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creating asp application with rich text and dynamic row controls

I am familiar with C# standalones but never written any web applications. I need some pointers on c# asp.net applications to do following stuffs.
Create a table profile, insert rows and columns with rich text edit controls, ability to insert images(low priority) and dynamic row manipulations like move rows, insert custom rows (e.g. a data row from a db that can be inserted into my current table profile) and then export different table profiles into tabbed excel sheet.
I am looking at:
https://msdn.microsoft.com/en-us/library/cc850837%28office.14%29.aspx
http://www.c-sharpcorner.com/UploadFile/hrojasara/export-datagridview-to-excel-in-C-Sharp/
http://www.codeproject.com/Tips/820176/ASP-NET-Gridview-with-Row-Drag-and-Drop-using-Jque
http://www.codeproject.com/Articles/467788/Dynamically-adding-and-deleting-rows-from-ASP-NET
I will do my research but since i have no experience on controls available if someone points in right directions on concepts which is suitable for this as this looks more complex for 1st app it will be helpful
I would recommend you Kendo UI framework that allows to do what you need. This is a website with demo - http://demos.telerik.com/kendo-ui/grid/index. It allows to make Excel and PDF export as well.

opening sheet and selecting cells excel/c#

Hello I am looking for a way to open an Excel sheet programmatically and allow the user to be able to select a range of cells. My reasoning behind this is I am currently developing a lot of individual excel upload forms for pulling data in to a database I would like the ability to select the column headers as simply as highlighting the cells through excel and presenting a textbox for each to enter the equivalent DB table column name and store these. So effectively a form to create a form.
Many thanks
Charlie
Please check this article: Opening and Navigating Excel with C#.
There is also a section in MSDN library that completely covers Excel PIA.

Issue Report Export to Excel in RDLC Report

I have added an RDLC Report in my .Net Application.
Data generates in reports with Proper design.
But when I tried to export it into Excel, I get some columns Merged in more than one Cells...
How can I prevent Columns into merging cells ??
To avoid merged cells in exported SSRS reports, you need to verify that cell alignment is Excel-friendly. This usually can be fixed by making sure that headers and footers are aligned with the columns in the details area. The right side of a header, footer, or other object should align with the right side of the report columns, same goes for the left.
If you still experience issues, this MSDN blog post includes some additional workarounds.

OpenXml Spreadsheet. Value filters, styles and unicode characters

because of small documentation i have problems with OpenXml SpreadSheetDocument in C#.
How to make top row with filter?
How to make colors to alternate?
I want to put unicode characters in my SheetData, but when i oppen the excel it gives me an error..
Change the top row color.
Can you say if there are some proper ways to do this, some more documentation than these available on msdn, or post some StyleSheet code?
Sorry for my english.
Thanks.
I think that your question is really about how to create tables in a spreadsheet. Tables are a cool feature of Open XML / Excel 2007 / 2010 that enable you to sort a range of cells by clicking on column headings. Also they are presented with alternative color bands for rows. There are additional features, such as ability to have a total row, and automatic expansion when you insert a row.
I've written a blog post about tables and how to create them: Exploring Table Markup in SpreadsheetML. In addition, I've recorded a 15 minute screen-cast that explores the markup, and shows how to create an Open XML SDK program that converts ordinary cells into a table.
-Eric
I can't give you a silver bullet, unfortunately, but what I did when trying to work out how to build Word Documents with OpenXML was to do the work in Word, then explore the resulting .docx file to see what the effect was.
I've suggest that the same investigative approach may help you with your spreadsheet.

How to create and manipulate powerpoint tables using openXML in C#

i am looking at this example on how to manipulate powerpoint templates from C# and the one thing missing is the ability to manipulate rows in a table. Does anyone have any examples of looping through some set of records and adding rows to a powerpoint table
In particular:
Adding and removing rows
Word wrap / auto adjusting heights given text length
Updating text in cells
Dealing with if the number of records would cause the table to span multiple powerpoint slides
In the end, i wound up purchasing aspose.slides which is great and well worth the cost when trying to auto generate powerpoin files.

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