Hello, I tried to make a multipart request with an `Upload` form control but when I want to get my f...

# kvision

[Jamy]

Hello, I tried to make a multipart request with an Upload form control but when I want to get my file from my form, It always return null on upload field even if I used your sample on your doc: Client side file handling

val pictureForm = formPanel<Request> {
    add(Request::upload,
        Upload(multiple = false, label = "Upload files (images only)").apply {
            showUpload = false
            showCancel = false
            explorerTheme = true
            dropZoneEnabled = true
            allowedFileTypes = setOf("image")
        })
}
button("Submit").onClick {
    GlobalScope.launch {
        val fdata = pictureForm.getDataWithFileContent()
        val firstImage = fdata.upload?.firstOrNull()?.content
        if (firstImage != null) {
            Alert.show("Image", "<img src=\"$firstImage\">", rich = true)
        }
        console.log(firstImage)
    }
}

[Robert Jaros]

You need to set uploadUrl parameter

[Robert Jaros]

The documentation uses / value

[Robert Jaros]

It's important, because if you omit this parameter, the component works in standard form submission mode (https://kvision.gitbook.io/kvision-guide/part-2-advanced-features/form-controls-guide#standard-html-form-submission).

[Robert Jaros]

If the parameter is set you can use two other modes.

[Robert Jaros]

I've added a note in the documetation.

[Jamy]

Ahh sorry I bad, I didn't see your note 😶
Thank you !

[Jamy]

Did you just add the note ? Or was it there before ?

[Robert Jaros]

I've added the note just now.

[Robert Jaros]

The example code has "/" parameter, but it wasn't clear enough.