{"id":3470,"date":"2014-03-25T13:11:03","date_gmt":"2014-03-25T13:11:03","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/25\/problem-about-excel-interop-collection-of-common-programming-errors\/"},"modified":"2014-03-25T13:11:03","modified_gmt":"2014-03-25T13:11:03","slug":"problem-about-excel-interop-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/25\/problem-about-excel-interop-collection-of-common-programming-errors\/","title":{"rendered":"problem about excel-interop-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/c9bcbbf79cd59b469f0a7c0a2a4c1060?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ndownwitch<br \/>\nc# excel vsto excel-interop<br \/>\nNew to VSTO, know Excel&#8217;s model very well&#8230; 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&#8217;Microsoft.Office.Interop.Excel.WorksheetFunction&#8217; does not contain adefinition for &#8216;CountA&#8217;about which I can find little further information. What am I missing?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/171ecd85df0aa3c863e5e37ef4012310?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRichardTheKiwi<br \/>\nc# .net visual-studio interop excel-interop<br \/>\n&#8230;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] = &#8220;Value&#8221;;&#8230;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/8STFD.jpg?s=32&amp;g=1\" \/><br \/>\nRazor Storm<br \/>\nc# excel excel-interop<br \/>\nI 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(&#8220;C4&#8221;).Value = &#8220;test Ribbon complete&#8221;; }In the ribbon I added a button that when pressed will call testRibbon in a thread:private void process_Click(object sender, Ribbo<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/0ec0f5be7749c8cc8ccda4a809103f36?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsvick<br \/>\nc# excel-interop<br \/>\nI 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?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/1aa48f7606f5b08595b0a0356a61e8b6?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJohn Saunders<br \/>\nc# excel interop excel-interop<br \/>\nI&#8217;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/518a0a70ab074772981ebd8414e819ba?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1546315<br \/>\nc# excel excel-interop<br \/>\nI have a C# program that is creating, writing, and saving an excel file using the Excel Interop. The problem is that if I don&#8217;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/518a0a70ab074772981ebd8414e819ba?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1546315<br \/>\nc# excel excel-interop<br \/>\nI 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&#8217;m a beginner to intermediate level C# programmer and an advanced solution will likely be out of my scope of knowledge.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/sJa0E.png?s=32&amp;g=1\" \/><br \/>\nD_Bester<br \/>\nc# .net vb.net excel excel-interop<br \/>\nI&#8217;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&#8217;t stay alive. Here is a knowledge Base article describing the problem and Microsoft&#8217;s recommended solution. Essentially:&#8217;close files&#8217;Quit Excel xlApp.quit()&#8217;Release and collect garbage System.Runtime.InteropServices.Marshal.FinalReleaseComObject(xlApp) GC.Collect() GC.WaitForPendingFinalizers()Many people don&#8217;t recommend killing the process; See How to properly clea<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/GCbQR.png?s=32&amp;g=1\" \/><br \/>\nReynier<br \/>\nc# interop excel-interop<br \/>\nI 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] = &#8220;http:\/\/csharp.net-informations.com&#8221;;xlWorkBook.SaveAs(&#8220;csharp-Excel.xls&#8221;, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/5cbd5a420fd6f4fe3aa0b4e684185f7a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1067334<br \/>\nc# asp.net excel impersonation excel-interop<br \/>\nI 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 = &#8220;Worksheet1&#8221;; excel.Visib<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/8STFD.jpg?s=32&amp;g=1\" \/><br \/>\nRazor Storm<br \/>\nc# excel-interop<br \/>\nExcel.SeriesCollection seriesCollection = chartPage.SeriesCollection(); Excel.Series series1 = seriesCollection.NewSeries(); series1.XValues = activeSheet.Range[&#8220;E1&#8221;, &#8220;E3&#8221;]; series1.Values = activeSheet.Range[&#8220;F1&#8221;, &#8220;F3&#8221;];series1.Points(0).Format.Fill.ForeColor.RGB = Color.Green.ToArgb();Gives a invalid parameter exception. Here&#8217;s the details:System.Runtime.InteropServices.COMException was unhandled by user codeHResult=-2146827284Message=Invalid ParameterSource=SErrorCode=-2146827284StackTrace:at<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/518a0a70ab074772981ebd8414e819ba?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1546315<br \/>\nc# excel excel-interop<br \/>\nIs 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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/518a0a70ab074772981ebd8414e819ba?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1546315<br \/>\nc# excel excel-interop<br \/>\nI 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 &#8216;ExcelApi, Version=1.5.1.2, Culture=neutral, PublicKeyToken=9084b9221296229e&#8217; or one of its dependencies. The system cannot find the<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/O5CjM.png?s=32&amp;g=1\" \/><br \/>\njth41<br \/>\nc# visual-studio-2010 excel excel-interop<br \/>\nFor 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 = &#8220;Failed to Load Workbook&#8221;;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/a7702f74f3814b23e7aa6040a211f487?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nTodd Main<br \/>\nvb.net excel interop com-interop excel-interop<br \/>\nWhen I run the following code, I get the exception below:&#8221;# 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(&#8220;Report&#8221;)&#8221;# Retreive data from sheetReleaseCOM(ReportSheet) ReportBook.Close(True) &#8221;# Error raised here ReleaseCOM(ReportBook) ReleaseCOM(ReportBooks)ERROR: COMException was unhandled The object invoked has disco<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/dbb19915c39391b3ce5ba7a81e694dc9?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nPatrick<br \/>\nmultithreading excel-interop<br \/>\nI&#8217;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&#8217;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 &#8220;available&#8221; and when it is it fires an event.When I run the rename code from inside this available event<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e68e4bb44a3adc96ea93049bbddf0558?s=128&amp;d=identicon&amp;r=PG\" \/><br \/>\nMaya<br \/>\nvisual-studio-2010 excel excel-interop<br \/>\nI 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.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/faf842a58302272c0835f78e783097e3?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsm1<br \/>\nc# excel-interop<br \/>\nI&#8217;m new to C# and trying to accomplish some simple excel manipulation through the interop library.I&#8217;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&#8217;s a &#8216;rows selected.&#8217; count which prints out in an automated report. It always appears in the first column.The error &#8220;COMexception unhandled &#8211; Cannot access read-only document &#8211; test1.xlsx&#8221; appears after the row is deleted and I try to Close() the<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>downwitch c# excel vsto excel-interop New to VSTO, know Excel&#8217;s model very well&#8230; 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&#8217;Microsoft.Office.Interop.Excel.WorksheetFunction&#8217; does not contain adefinition for &#8216;CountA&#8217;about which I [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3470","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3470"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3470\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}