In the ASP.NET MVC application, realize the excel file that supports Ajax
Introduction
In web applications, you may need to generate an Excel file containing form data, but you do not want to affect the rest of the UI. At this time, AJAX (asynchronous JavaScript and XML) came in handy, which allowed you to interact with the server without re -loading the entire page. This article discusses how to download the AJAX -based Excel file download in ASP.NET MVC applications.
The server -side file generates
Since the AJAX cannot be directly downloaded to download the files, you can use AJAX to send the relevant data to the server's replacement method. The server will then use the Epplus or NPOI and other libraries to create an excel file.
After generating files, you can return the file path or file name as AJAX response. The Ajax function will use this path or file name to redo the corresponding operation of the processing file download.
ajax calls
The client AJAX call will publish the form data to the server -side operation. After success, it will receive the file path or file name as a response, and redirect the user to the download operation.
Download operation
The download operation searches files from the specified position on the server and returns it to the browser for download. <code class="language-javascript">$.ajax({
type: 'POST',
url: '/Reports/ExportMyData',
contentType: 'application/json; charset=utf-8',
dataType: 'json',
success: function (returnValue) {
window.location = '/Reports/Download?file=' + returnValue;
}
});</code>
The advantages of downloading based on AJAX
Seamless user experience: <code class="language-csharp">[HttpGet]
public virtual ActionResult Download(string file)
{
string fullPath = Path.Combine(Server.MapPath("~/MyFiles"), file);
return File(fullPath, "application/vnd.ms-excel", file);
}</code> File download process is transparent for users because they don't have to leave the current page.
Optimized server resources: By storing files in Tempdata instead of physical storage, you can save server memory and eliminate the demand for cleaning routine.
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