Question

135

Accessing controls in Master page from content page

rated 0 times [ 136] [ 1] / answers: 1 / hits: 15360 / 10 Years ago, wed, march 12, 2014, 12:00:00

I am trying to access control in Master page from Content page(Asp.net) using javascript like this

alert(document.getElementById('<%=((Label)Master.FindControl(lbl)).ClientID %>').value);

control in Master page is as follow,

 <asp:Label ID=lbl runat=server Text=one></asp:Label>

But unfortunately it is not working. I am getting undefined value

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dillionsalvadorg

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3 Years ago

answered 10 Years ago malkajillc · Accepted Answer

I noticed that you are actually accessing the .value field of the element that the <asp:Label /> control generates, which is a <span></span>. This type of element won't return anything for the .value attribute. If you are actually trying to access its text then use:

alert(document.getElementById('<%=((Label)Master.FindControl(lbl)).ClientID %>').innerText);

or

alert(document.getElementById('<%=((Label)Master.FindControl(lbl)).ClientID %>').innerHTML);