SharePoint - Check File Name in Upload form in Document Library con Javascript

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Se si desidera controllare il nome del file di un nuovo documento in un Upload form, possiamo farlo con del buon Javascript !

Ho creato una funzione che controlla il nome del file e poi disattiva il bottone OK se la condizione non è verificata


Ho eseguito un override della funzione CheckAssetLibMediaExtension sull'evento "onchange" del controllo input file nel file Upload.aspx.

Se vediamo il codice HTML del file Upload.aspx (da browser), troviamo:

<input name="ctl00$PlaceHolderMain$UploadDocumentSection$ctl05$InputFile" type="file" id="ctl00_PlaceHolderMain_UploadDocumentSection_ctl05_InputFile" class="ms-fileinput ms-fullWidth" size="35" onfocus="ResetSpFormOnSubmitCalled();" onchange="CheckAssetLibMediaExtension()" title="Scegliere un file" />

Cercando la funzione, troviamo:

function CheckAssetLibMediaExtension()
{

}

Così, possiamo farne l'override!

Creiamo nella masterpage la referenza al jQuery e aggiungiamo la funzione seguente:

function CheckAssetLibMediaExtension(){
var inputFile = $("input[name$='InputFile']");
var nomeFile = inputFile.val().split('\\').pop();
if(!(nomeFile.indexOf('STRINGTOAVOID')>-1)){
           alert('Warning: file name not must contains "STRINGTOAVOID"!!');
   $("input[name$='btnOK']").attr('disabled','disabled');
   return;
}
        $("input[name$='btnOK']").removeAttr('disabled');
}

Quando l'utente seleziona un file, l'Input File cambia e la funzione viene chiamata.
La funzione mostra un alert se nel nome file c'è la stringa "STRINGTOAVOID".
Quindi, disabilita il bottone OK, e l'utente è obbligato a cambiare il nome del file prima di selezionarlo.

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