You have to use Visual Studios GUI to add an assembly to your program to use Excel interop.
Microsoft Office Interop Excel Missing Free To UseWe use that name in the examples, but you are free to use something more familiar or standard.If you look at various Excel interop objects in IntelliSense, you will see hundreds of undocumented functions.
You will only need to use a fewunless you have complex requirements. In the constructor, make the excelApp a new Application object. ![]() There are many Type.Missing arguments. ![]() You dont need to know what they do. In Excel, you can switch between sheets by clicking on the tabs on the bottom. Once you get the objects, you dont need to do any more Interop. Using the Cells indexer on a range, or getting the range with the Range property or getRange() is slow. Microsoft Office Interop Excel Missing Code Above ShowsThe code above shows one solution, which is to use getValue() instead of Value2. Also, you can use new features from the.NET Framework 4.0 to simplify how you use Excel. The range of the data we want to chart is encoded in the topLeft and bottomRight constants. You can see we use the ChartObjects property and then Add a Chart. We use the XlChartType.xlLine enumerated constant and call ChartWizard(). The program, upon execution, will create a chart based on those four values. It is confusing to call the complicated Open method with Type.Missing in more places than necessary.
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