[CLOSED] Download File via DirectEvent

[plok77]

How would a file download that is initiated via a DirectEvent work in Ext.NET v7?

This forum post (https://forums.ext.net/showthread.php?27575-Download-File-using-DirectEvent) explains how it worked in a previous version. I can't find any 'IsUpload' property for a click event handler in v7 though. I assume things have changed somewhat in the framework since that post was written.

In the code-behind of a Razor page, I want to create a button that, when clicked, will invoke a Direct Event for the page. Something like this:


new Button
{
Text = "Export",
DirectEvents =
{
new ClickDirectEventHandler
{
Url = "ExportToExcel", // How to set page handler instead?
ExtraParams =
{
new DirectEventParameter
{
Key = "TabName",
Value = tabName
}
}
}
}
}

The handler for the Direct Event looks something like this:


[Direct]
public async Task<IActionResult> OnPostExportToExcelAsync([FromBody] ExcelExportData request)
{
byte[] fileContents = DoWorkToCreateExcelFile();

return File(
fileContents,
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"MyFile.xslx");
}

Thanks

Paul

[fabricio.murta]

Hello Paul!

You probably want to check this forum thread: Download File using DirectEvent (https://forums.ext.net/showthread.php?63101)

We answered that very similar question some time ago and we still didn't receive a feedback from the one asking it, so it'd be appreciated if you can let us know if that helps or not, so we could improve the answer.

Hope this helps!

[plok77]

Fabricio

Yes, it did help. I ended up attaching a JavaScript listener to the button click event, and using the listener to trigger the submission of a HTML form element on the page that invoked the file download action of my Razor page. This worked OK, so no need to use a DirectEvent.

Regards

Paul

[fabricio.murta]

Thanks for the feedback, Paul, glad it helped you find the best approach to solve the file download functionality!