problem about excel-interop-Collection of common programming errors
downwitch
c# excel vsto excel-interop
New to VSTO, know Excel’s model very well… I have using Excel = Microsoft.Office.Interop.Excel;at the head of my class, and the following simple call, which compiles correctly and even appears correct in intellisensedouble usedRows = (double)Excel.WorksheetFunction.CountA(oWks.Columns[1]);but fails at runtime with this exception’Microsoft.Office.Interop.Excel.WorksheetFunction’ does not contain adefinition for ‘CountA’about which I can find little further information. What am I missing?
RichardTheKiwi
c# .net visual-studio interop excel-interop
…Excel.Application oXL; Excel._Workbook oWB; Excel._Worksheet oSheet;oXL = new Excel.Application(); oWB = (Excel._Workbook)oXL.ActiveWorkbook; oSheet = (Excel._Worksheet)oWB.Sheets[1];oSheet.Cells[5,10] = “Value”;…yields this at crash:Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.at ConsoleApplication1.Program.Main(String[] args) in C:\Wherever\Visual Studio 2008\Projects\ConsoleApplication20\ConsoleApplication20\Program. cs:line 60I
Razor Storm
c# excel excel-interop
I have an excel addin class that has this function:public void testRibbon() {Excel.Workbook workbook = this.Application.ActiveWorkbook; Excel.Worksheet activeSheet = workbook.Sheets[1];Excel.Range range = activeSheet.get_Range(JOB_ID_FIELD + HEADER_ROW, TOTAL_STATUS_PERCENTAGE_KEY_FIELD + (10 + 1).ToString());range.get_Range(“C4”).Value = “test Ribbon complete”; }In the ribbon I added a button that when pressed will call testRibbon in a thread:private void process_Click(object sender, Ribbo
svick
c# excel-interop
I am creating an excel application with c#. Since I will maintain the excel file in urgency I want to keep its handler open. I want to keep the excel process id so I will be able to kill it in case the system crashs.How can I get the Excel Pid when creating it?
John Saunders
c# excel interop excel-interop
I’m trying to find the count of all cell with constants using Excel Interop assembly.On small files this works fine. However on larger files excel crashes.I tried it on a file with 206963 rows and 9 columns and excel crashed.Anyone know of a workaround? Is there a list of the limitations of the SpecialCells function and when it should not be used?The following is my code:public static int getConstantCount(Range myRange) //myRange = myWorksheet.UsedRange {try{ return myRange.SpecialCells(XlCe
user1546315
c# excel excel-interop
I have a C# program that is creating, writing, and saving an excel file using the Excel Interop. The problem is that if I don’t have the application quit immediately after saving and closing the excel file then the c# application gets an unhandled exception and crashes. Has anyone found a way to do this while being able to keep the host c# application open and running.Here is the code that handles everything involving the Excel Interopclass CreateExcelDoc {string newFormString = trialReportFor
user1546315
c# excel excel-interop
I am trying to save an excel file that was created and written to via a C# application using the Excel Interop. I have looked all over this site as others to find a code that properly works and I have yet to find one. My excel interop funciton uses a workbook, worksheet, app, and workshee_range object. Does anyone have any suggestions. The easier the solution the better. I’m a beginner to intermediate level C# programmer and an advanced solution will likely be out of my scope of knowledge.
D_Bester
c# .net vb.net excel excel-interop
I’ve seen a lot of articles and questions about how to be sure that Excel actually quits when you want it to and the process doesn’t stay alive. Here is a knowledge Base article describing the problem and Microsoft’s recommended solution. Essentially:’close files’Quit Excel xlApp.quit()’Release and collect garbage System.Runtime.InteropServices.Marshal.FinalReleaseComObject(xlApp) GC.Collect() GC.WaitForPendingFinalizers()Many people don’t recommend killing the process; See How to properly clea
Reynier
c# interop excel-interop
I found this code on Internet to create a Excel file using Interop library:object misValue = System.Reflection.Missing.Value; xlWorkBook = xlApp.Workbooks.Add(misValue); xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); xlWorkSheet.Cells[1, 1] = “http://csharp.net-informations.com”;xlWorkBook.SaveAs(“csharp-Excel.xls”, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue
user1067334
c# asp.net excel impersonation excel-interop
I am using the following piece of code to write into the excel file dynamically on a ASP.net form that can save the data table to excel.//Create Excel Object Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Open(target); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];worksheet.Name = “Worksheet1”; excel.Visib
Razor Storm
c# excel-interop
Excel.SeriesCollection seriesCollection = chartPage.SeriesCollection(); Excel.Series series1 = seriesCollection.NewSeries(); series1.XValues = activeSheet.Range[“E1”, “E3”]; series1.Values = activeSheet.Range[“F1”, “F3”];series1.Points(0).Format.Fill.ForeColor.RGB = Color.Green.ToArgb();Gives a invalid parameter exception. Here’s the details:System.Runtime.InteropServices.COMException was unhandled by user codeHResult=-2146827284Message=Invalid ParameterSource=SErrorCode=-2146827284StackTrace:at
user1546315
c# excel excel-interop
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 i
user1546315
c# excel excel-interop
I am getting the following unhandled exception when I try to create an excel document using my c# application. This process works fine when I am running the c# application from visual studio 10, but when I try to run the application outside of visual studio using the .exe file this error is appearing.System.IO.FileNotFoundException: Could not load file or assembly ‘ExcelApi, Version=1.5.1.2, Culture=neutral, PublicKeyToken=9084b9221296229e’ or one of its dependencies. The system cannot find the
jth41
c# visual-studio-2010 excel excel-interop
For the current code:String currentPath = Directory.GetCurrentDirectory();OpenFileDialog op = new OpenFileDialog();op.InitialDirectory = currentPath;if (op.ShowDialog() == DialogResult.OK)currentPath = op.FileName;else{toolStripStatusLabel1.Text = “Failed to Load Workbook”;toolStripStatusLabel1.Visible = true;}Workbook wb = new Workbook(excel.Workbooks.Open(currentPath));I recieve the error:System.Runtime.InteropServices.COMException was unhandledMessage=Retrieving the COM class factory for comp
Todd Main
vb.net excel interop com-interop excel-interop
When I run the following code, I get the exception below:”# NOTE: ExcelApp is a Private main form variable Dim ReportBooks As Excel.Workbooks = ExcelApp.Workbooks Dim ReportBook As Excel.Workbook = ReportBooks.Open(localFilename) Dim ReportSheet As Excel.Worksheet = ReportBook.Sheets(“Report”)”# Retreive data from sheetReleaseCOM(ReportSheet) ReportBook.Close(True) ”# Error raised here ReleaseCOM(ReportBook) ReleaseCOM(ReportBooks)ERROR: COMException was unhandled The object invoked has disco
Patrick
multithreading excel-interop
I’m working on an application that has to make specific decisions based on files that are placed into a folder being watched by a file watcher.Part of this decision making process involves renaming files before moving them off to another folder to be processed.Since I’m working with files of all different sizes I created an object that checks the file in a seperate thread to verify that it is “available” and when it is it fires an event.When I run the rename code from inside this available event
Maya
visual-studio-2010 excel excel-interop
I am using C# with Selenium for my tests, and Excel Interop for reporting test results.When I run my test in Visual Studio, it shows the following error:Clicking on Debug, opens the Visual Studio Just-In-Time Debugger, and when I debug, I get the following messages:When unhandled exception at 0x7c812afb in excel.exe: 0xe0000002: 0xe0000002.An unhandled win32 exception occurred in excel.exe[3920].Has anyone experienced such error? Can anyone suggest me anything to resolve this? Thanks in advance.
sm1
c# excel-interop
I’m new to C# and trying to accomplish some simple excel manipulation through the interop library.I’d like to delete a text value which always appears as a separate line below the actual data table (with a blank row between the table and the text). It’s a ‘rows selected.’ count which prints out in an automated report. It always appears in the first column.The error “COMexception unhandled – Cannot access read-only document – test1.xlsx” appears after the row is deleted and I try to Close() the
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