Next: I show some benchmarks I took comparing the various techniques of Excel interop. There are benefits to reducing calls to Excel Interop. Once you get the objects, you don't need to do any more Interop. In this example, the object array is directly usable in the C# language. Do something with the data in the array with a custom method. XlRangeValueDataType.xlRangeValueDefault) Object valueArray = (object)excelRange.get_Value( of the cells in the sheet (their values). Worksheet sheet = (Worksheet)workBookIn.Sheets They are indexed starting at 1.įor (int sheetNum = 1 sheetNum < numSheets + 1 sheetNum++) Get sheet Count and store the number of sheets. Private void ExcelScanIntenal(Workbook workBookIn) / for this workbook in an object array. / Scan the selected Excel workbook and store the information in the cells This is similar to Visual Basic but not the C# language. Tip: In Excel Interop, sheets are indexed starting at 1. In Excel, you can switch between sheets by clicking on the tabs on the bottom. An Excel workbook has one or more sheets. To get data from workbooks, you will need to loop over the sheets. Note: I don't have the information about all the detailed exceptions that can be thrown. You will need to deal with exceptions in the catch block. Close the workbook and release all the memory. Send the workbook we open to another function called ExcelScanInternal. Next, open a workbook with Workbooks.Open. And don't panic over those Type.Missing arguments. Open excel on mac and java code#This is probably the result of legacy code at Microsoft. I apologize for the mess that is Workbooks.Open. WorkBook.Close(false, thisFileName, null) will iterate through the worksheets in the workbook. Pass the workbook to a separate function. Type.Missing, Type.Missing, Type.Missing, Type.Missing, those arguments do, but they can be changed to influence behavior. This mess of code opens an Excel workbook. Public void ExcelOpenSpreadsheets(string thisFileName) Will throw an exception if a file cannot be found or opened. Send the workbook to the next function, the internal scan / Open the file path received in Excel. Method that opens Excel workbooks: C# /// The following code uses the Workbooks.Open method. ![]() Put a public function on the class, and it can use the _excelApp we already have. To open Excel files, you must call Workbooks.Open. In the constructor, make the _excelApp a new Application object. Put an Application object called _excelApp as a member. We need a place to store our Excel information, so we use our special class. / Store the Application object we can use in the member functions. / It can be shared in many places to avoid duplication. / This class contains the Excel Interop code we need. You will only need to use a few-unless you have complex requirements. If you look at various Excel interop objects in IntelliSense, you will see hundreds of undocumented functions. Tip: Add the using line to your class file-this will make the Excel namespace handy.Įxcel interop methods. Open excel on mac and java free#We use that name in the examples, but you are free to use something more familiar or standard. Namespace containing Excel interop methodsįirst, we make a new C# class file in Visual Studio and you can call it something like ExcelInterop. You have to use Visual Studio's GUI to add an assembly to your program to use Excel interop. You must include a namespace to use Excel in your C# program. Tip: Add the assembly by going to Project -> Add Reference. This assembly sometimes creates performance issues. These files are hard to read in C# programs. It applies to read XLS files.Įxcel creates XLS and XLSX files. This C# tutorial handles Microsoft Excel files.
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