I have a select list like this
<select asp-for="FileTypeIndex" class="form-control" id="FileTypeIndex" asp-items="Html.GetEnumSelectList<FileTypeIndex>()"></select> <input type="file" class="form-control " accept="*.*" id="productfile" name="productfile">
I want to change the accept attribute of file input according to the selected FileTypeIndex by JQuery
$('#FileTypeIndex').on('change',function() { var filytypeIndex=$('#FileTypeIndex').val(); switch(filytypeIndex) { case 1: $('#productfile').attr("accept", ".pdf"); break; case 2: case 5: $('#productfile').attr("accept", ".mp4,.avi"); break; case 3: $('#productfile').attr("accept", ".mp3"); break; case 4: $('#productfile').attr("accept", ".jpg"); break; default: } });
But it is always “.“, and it won’t change
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Answer
You just need to change the datatype of filytypeIndex
variable to number using Number()
function of javascript.
Because in switch case gives 1,2,3 … it is numbers
Your final code like below
$('#FileTypeIndex').on('change', function () { var filytypeIndex = Number($('#FileTypeIndex').val()); switch (filytypeIndex) { case 1: $('#productfile').attr("accept", ".pdf"); break; case 2: case 5: $('#productfile').attr("accept", ".mp4,.avi"); break; case 3: $('#productfile').attr("accept", ".mp3"); break; case 4: $('#productfile').attr("accept", ".jpg"); break; default: } });
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <select asp-for="FileTypeIndex" class="form-control" id="FileTypeIndex" asp-items="Html.GetEnumSelectList<FileTypeIndex>()"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> <input type="file" class="form-control " accept="*.*" id="productfile" name="productfile">