I am using following code to find control id.
alert(document.getElementById("<%# TextBox1.ClientId %>").value )
but this code is giving error "object required". Please help me.
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1Do you have a control with that name...?gdoron– gdoron2012-05-16 12:10:51 +00:00Commented May 16, 2012 at 12:10
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5 Answers
You need to use '=', not '#'
alert(document.getElementById("<%= TextBox1.ClientId %>").value );
The "<%#" symbol is an inline expression used for databinding.
The "<%=" symbol there is used for display / translation purposes. It basically does a Response.Write of just the value of the .ClientID property of your server control.
See this article on inline expressions in asp.net for more info.
Comments
replace # with = in the given statement updated statement is
alert(document.getElementById("<%= TextBox1.ClientId %>").value);
Comments
Either use
alert(document.getElementById("<%= TextBox1.ClientId %>").value )
or set ClientIDMode="Static" for textbox and then
alert(document.getElementById("<%= TextBox1 %>").value )
1 Comment
vikas
should be
"<%= TextBox1.ClientID %>"alert(document.getElementById('Id of control').value )
You can get the exact id of control by view source.
1 Comment
Josh Mein
This is correct but with MasterPage ID mangling this can be a pain and make your code look horrible.
In the context of JavaScript, which is on the client side "<%# TextBox1.ClientId %>" has no meaning because this will be translated by ASP into to a different ID based on how you configure TextBox1.ClientIDMode for which you have 4 modes described here Control.ClientIDMode
