NET and provides sample code to automate Excel. On the File menu, click New, and then click Project. Form1 is created by default. Scroll to the top of the code window. Add the following line to the end of the list of using directives:. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. The following code adds two new records to a table in Book7. The table in this case is Sheet When you add records with ADO.
NET as shown in this example, the formatting in the workbook is maintained. Each record that is added to a row borrows the format from the row before it. For additional information about using ADO. NET and Visual C. Excel and can open any XML file that is well-formed. If you create XML files for use in Excel, you can also create style sheets to format the data. The sample program will store Excel workbooks in this folder. On the File menu, point to New, and then click Project.
By default, Form1 is created. To do this, follow these steps:. Note In Visual Studio , you do not have to click Select. The handler for the Form's Load event is created and appears in Form1.
On the View menu, click Designer to switch to design view. Double-click Button1. Note You must change the code in Visual Studio By default, Visual C adds one form to the project when you create a Windows Forms project. The form is named Form1. The two files that represent the form are named Form1. You write the code in Form1. The Form1. Microsoft Office Development with Visual Studio.
Skip to main content. Works only on Windows operating systems. With support for. NET Standard 2. NET Core 2. When using automation, Excel is loaded in the background, using a lot of MB and loading a large number of files and DLLs. Spreadsheet is a single component that uses only 5 MB. Additional memory is allocated only when needed to perform certain operations. Generating a single worksheet with rows and columns takes seconds on our test machine. Spreadsheet is designed for processing large numbers of Excel files.
The same test took 0. This results in the same disadvantages as with calling any COM object from the managed code type conversions, need for COM wrapper, bad integration with.
NET Framework, etc. Spreadsheet is a pure. NET component, designed and developed to conform to Microsoft standards for. NET libraries. You can use our component for an unlimited number of projects you don't need to purchase additional "OEM licenses" and we don't force you to purchase subscription packages.
Our licensing is very simple: every developer working with our component needs to have a developer license. We don't care if it is a Windows or web application, how many servers you use, or if you have just one customer or millions of customers. Performance In the case of a desktop application, you don't want your users to wait 20 seconds for every single report.
In the case of a web application, you want your server to simultaneously support as many users as possible. Our test programs generate a single XLS file with rows and columns of tabular data.
These were the results on our test machine: Microsoft Excel automation takes seconds to generate the file. Spreadsheet takes 0. The performance example is included here , so you are free to do the test yourself and see how our component performs with the tabular data that you require. Spreadsheet is designed and developed to conform to Microsoft's standards for. Caching also enables you to access the worksheet in a more natural way.
For example, changing cell text orientation would be one line in GemBox. Spreadsheet: ws. Cells[6, 0].
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