excel-interop

I had previously installed the VS11 beta, and had some issues with my Visual Studio 2010 instance, which you can see here how they were resolved: Excel AddIn Click Once deployment issue . Now I have a code base which compiles/builds a vsto, which installs fine and runs fine in Excel 2010. However, when I remove the installed version from Excel, and try to run it directly through Visual Studio 2010, the AddIn does not get loaded into Excel when running in debug configuration mode, in release configuration mode it works fine. Any ideas on why this might be occurring? I've tried re-enabling it

Is there a way to save changes to an excel spreadsheet through the excel interop (in this case I am adding a worksheet to it) without having it prompt the user if they want to overwrite the existing file with the changes. I do not want the user to even see the spreadsheet open in my application so having a message box popping up asking them if they want to overwrite the file seems very out of place and possibly confusing to the user. I am using the workbook.SaveAs(fileloaction) method. Here is where I am initializing the COM reference objects for the excel interop. private Excel.Application

Similar to this question (but in my case not VSTO SE), however, I just want to confirm that it is not possible to create a UDF using pure VSTO in Visual Studio 2005 and Excel 2003 - so, to absolutely clear, my question is: Is it possible to create a Excel 2003 UDF using Visual Studio 2005 and a VSTO solution without using any VBA or other tricks? I'm aware of ManagedXLL, ExcelDNA, Excel4Net etc but don't want to consider those for the moment. Thanks Concerning whether there is a way around COM or VBA I don't think that it is possible (at least not without any very dirty tricks). The reason is

I wrote a code to read a column from a Excel file. I use Microsoft.Office.Interop.Excel on this, first read the entire Range and then write in System.Array after that I do some operations with the System.Array values and finally I convert it to List because I fill a ListBox element. This is the code (only relevant parts): private List<string> bd = new List<string>(); private static System.Array objRowAValues; private List<string> bl = new List<string>(); private static System.Array objRowBValues; private List<string> cm = new List<string>(); private static System.Array objRowCValues; private

This question is quite similar to the one asked here . But the answer given suggests copying the format along with the data. I have a excel sheet (.xlsx) that I generate using SSIS. Now I have set the formatting in first row, which I want to copy to all the rows that are already filled in the worksheet. How can I do that using C#? I am using Excel interop. You can use PasteSpecial with xlPasteFormats . Excel.Range R1 = (Excel.Range)oSheet.Cells[11, 11]; R1.Copy(Type.Missing); Excel.Range R2 = (Excel.Range)oSheet.Cells[15, 15]; R2.PasteSpecial(Excel.XlPasteType.xlPasteFormats, Excel