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Home Backend Development C++ How to Download an Excel File Generated from an MVC Form using AJAX?

How to Download an Excel File Generated from an MVC Form using AJAX?

Jan 29, 2025 am 12:15 AM

How to Download an Excel File Generated from an MVC Form using AJAX?

Download Excel file

When processing large forms in MVC, a Excel file may need to be generated, which contains data from a specific subset of the form without affecting the rest. AJAX provides a solution by allowing you to send some requests to the server.

Can't download the Excel file directly

Unfortunately, you cannot return the files you want to download directly through AJAX. Instead, please explore the replacement method of using AJAX to publish related data to the server.

The generating and response of the server -side file

On your server, you can use the server code to generate excel files. For this reason, please consider using libraries such as Epplus or NPOI. You can pass the path or file name of the created file as the return value to your Ajax call. Reset to the file to download

In the client's JavaScript, you can use

to set the position of the JavaScript window to the URL of the file to indicate the browser to download it. Seamless user experience

window.location = '/Reports/Download?file=' returnValue This method provides seamless user experience because the file download operation will not leave the source page.

AJAX call example

The following is an example of AJAX call that achieves this purpose:

The controller method used for file download

The corresponding controller method of the download operation may be shown below:

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