Want to access literal value into javascript

问题

I have got a literal control on page (with some data on it). i want to access it in javascript and want to put some text on it. please tell me how can i access literal control in JavaScript. I was trying with following code-

<asp:Literal  ID="lblPerInstanceListing" runat="server"></asp:Literal>

Javascript:

 var value= document.getElementById('<%=lblPerInstanceListing.ClientID %>')

I am getting null value return by this.

回答1:

An ASP.NET Literal control does not by itself insert any HTML into a webpage. Your Literal control is a placeholder for text or HTML you will set in your code behind.

You should wrap your literal in a DIV or SPAN and give that an ID and reference that DIV or SPAN in the JavaScript

WebForm:

<span id="yourId"><asp:Literal  ID="lblPerInstanceListing" runat="server"></asp:Literal></span>

JavaScript: Solved by this code.

var value= document.getElementById('yourId').innerText;

回答2:

<span id="yourId" runat="server"></span>

js :

var value= document.getElementById('yourId');

It is not better then use this code?? You can put in span enableviewstate to false if You need.

回答3:

It's a Literal. It renders literal HTML to the page. It doesn't render any container matching the ClientID that you can access on the client side.

Either put a div or span in the literal with an ID you can use, or use e.g. a Label or Panel control that does render a wrapping span or div you can use.

来源：https://stackoverflow.com/questions/15023975/want-to-access-literal-value-into-javascript