从后面的代码创建HTML隐藏控件

Question

I have a Masterpage application where I want to create a hidden field
<asp:HiddenField ID="hdnField" runat="server" Value=""/>

in order to get the client-side time, so I am following an option suggested "How can i get timezone of the client machine?" . However, since my application is a Masterpage app, my question is: where should I create the hidden control in the aspx file (in the .master file... or in the child aspx page or should I create it on the page_load event on the .cs page) ?

Answer 1

Just add the markup that you have in your question in your .master page. Make sure that it is located inside the <form> tag.

Your script (also in the masterpage) would look like this:

document.getElementById("<%=this.hdnField.ClientID%>").value = "...";