在按钮的onclick事件中将字符串传递给JavaScript函数

Question

I want to pass a value on onclick event of a button so that javascript may update the value of hidden field. But I am unable to pass string to js function

JS

<script>
   function sethdnfiletype(filetype)
   {
       $("#hdnfiletype").val(filetype);
   }
</script>

HTML

<asp:ImageButton ID="btn1" runat="server" ToolTip="Upload Report"  OnClick="sethdnfiletype(// here I want to send a number like 1 or 2 or 3 //);" href="#uploadTOEFilePopup" data-toggle="modal" ClientIDMode="Static">

Answer 1

You can send values to a function using onclick, just pass them in as you would call a function usually.

 function clickHandler(amount) { alert('Clicked with ' + amount); } 

 <button type="button" onclick="clickHandler(123);">Click me</button> 

Answer 2

You can use bind . Bind allows you to set some default parameters and the this context. So you could do this: sethdnfiletype.bind(this, 1); which would pass in the value 1 to your function as the first parameter and the event as the second parameter.