interop

I have a C# dll. The code is below: public class Calculate { public static int GetResult(int arg1, int arg2) { return arg1 + arg2; } public static string GetResult(string arg1, string arg2) { return arg1 + " " + arg2; } public static float GetResult(float arg1, float arg2) { return arg1 + arg2; } public Calculate() { } } Now, I am planning to call this dll from C++ on this way. [DllImport("CalculationC.dll",EntryPoint="Calculate", CallingConvention=CallingConvention::ThisCall)] extern void Calculate(); [DllImport("CalculationC.dll",EntryPoint="GetResult", CallingConvention=CallingConvention:

I am trying to get a column, but limiting it to used range... public static Excel.Application App = new Excel.Application(); public static Excel.Workbook WB; WB = App.Workbooks.Open("xxx.xls", ReadOnly: true); var sheet = (WB.Sheets[1] as Excel.Worksheet); // returns 65536 rows, I want only 82 (used range) sheet.get_Range("F:F"); sheet.UsedRange.get_Range("F:F").Rows.Count; // 65536 How can I get it? You can use sheet.UsedRange.Columns[6, Type.Missing].Rows.Count or this sheet.UsedRange.Columns["F:F", Type.Missing].Rows.Count Charles Williams Sounds like you want the Application.Intersect of

I have a managed assembly containing a few classes, and those classes have overloaded methods. I expose the assembly to COM/IDispatch callers via [ComVisible(true)] ..and also setting the proper Guid, on the assembly itself. I do not define an explicit interface for the COM interop. It's all done dynamically. I run regasm.exe /codebase on the managed DLL and it registers it for COM interop. When I run OleView, I can see the ProgId's of the various classes in the assembly. But, browsing into those ProgIds, and expanding IDispatch node, there is no TypeLib information for these classes. Even so,

I want to set some custom document properties of a word document I'm creating in my C# code. To do this, I followed this MSDN article and came up with this code: using Word = Microsoft.Office.Interop.Word; // Version 12.0.0.0 word = new Word.Application(); word.Visible = false; Word._Document doc = word.Documents.Add(ref missing, ref missing, ref missing, ref missing); logger.Info("Setting document properties"); Core.DocumentProperties properties = (Core.DocumentProperties)doc.BuiltInDocumentProperties; properties["Codice_documento"].Value = args[3]; properties["Versione_documento"].Value =

I have a C dll with exported functions I can use the command-line tool dumpbin.exe /EXPORTS to extract the list of exported functions, and then use them in my C# code to (successfully) call these functions. Is there a way to get this exported-functions-list directly from .NET, without having to use an external command-line tool? Thanks As far as I know there is no class in the .Net Framework that provides the information you need. However you can use the platform invocation services (PInvoke) of the .Net platform to use the functions of the Win32 dbghelp.dll DLL. This DLL is part of the

We want to use Microsoft.Office.Interop.Excel in our web application. Everything works fine on our local machines, but on our test machine we're running into problems. It has neither Visual Studio nor Office installed on it. We're using .NET framework 2.0 and the server is running on Windows Server 2003 with IIS6. Is there a dll that needs to be installed on the machine or added to the bin of the web application? You will need to have MS Office and the Office Interop assemblies installed on your server in order for that to work. I'm pretty sure that you will need to have Office installed on

I am trying to convert a .xls file to an .xlsx file on the server-side using Microsoft.Office.Interop.Excel.Workbook class as follows: workBook.SaveAs("FILENAME_HERE", XlFileFormat.xlOpenXMLWorkbook, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlNoChange, Microsoft.Office.Interop.Excel.XlSaveConflictResolution.xlLocalSessionChanges, Type.Missing, Type.Missing, Type.Missing, Type.Missing); and I get the following error: Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80080005