.click at code behind

Question

1.00/5 (1 vote)

See more:

.aspx

C#

<asp:HyperLink ID="leftMenu" runat="server">HyperLink</asp:HyperLink>

.aspx.cs

1.

C#

protected void Page_Load(object sender, EventArgs e)
{

   ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "", "document.getElementById('leftMenu').click();", true);
}

2.

C#

protected void Page_Load(object sender, EventArgs e)
        {
            Response.Write("<script>document.getElementById('leftMenu').click();</script>");
        }

Error: Uncaught TypeError: Cannot call method 'click' of null

I tried a lot of example, same error message. Please advice, what i missed? it's working if i put the script under .aspx javascript

Posted 10-Jun-13 14:16pm

melvintcs

Updated 10-Jun-13 15:53pm

v2

Add a Solution

Comments

Sergey Alexandrovich Kryukov 10-Jun-13 21:12pm

ASP.NET? Tag it!
—SA

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2013-06-10T15:10:00

The problem is: document.getElementById('leftMenu') is null (undefined). Apparently, you simply don't have an element with id="leftMenu". Check it up and make sure you have it.

Also, this method simulates the click, which is perhaps not the best way of having the same functionality on page load and on menu (button, or whatever else) click. Isn't it much easier to develop some function which you simply call from two places: when the form is loaded and from the control's event handler? If you do such thing, you won't loose anything at all but can save yourself from some annoying redundancies.

[EDIT]

Here is the problem: what is your "ID"? In your "asp" element, you should use ClientID instead. Please learn about its usage:
http://msdn.microsoft.com/en-us/library/system.web.ui.control.clientid.aspx[^].

—SA