javascript - asp.net button - JS click does not work -

javascript - asp.net button - JS click does not work -

i trying phone call js c# function. can not utilize ajax. have tried create asp.net button when clicked calls c# function , phone call click function js:

on html:

<asp:button runat="server" id="uploadbutton" onclick="upload_click" />

js:

alert("before click"); document.getelementbyid("uploadbutton").click(); alert("after click");

asp.net:

protected void upload_click(object sender, eventargs e) { //code }

the problem click event js not working. have tried write after first line of js code alert see if code rich line can see "after click".

i have seen answer: button's .click() command not working in chrome did not quite this.

you should set clientidmode static

<asp:button runat="server" id="uploadbutton" clientidmode="static" onclick="upload_click" />

otherwise, have randomized id, generated asp.net, setting clientidmode static, you're saying asp.net not meddle ids , maintain them intact.

other alternative utilize clientid property have value of automatically generated id like

document.getelementbyid('<%= uploadbutton.clientid %>').click();

javascript c# html asp.net click