'this' keyword causing some problem (ASP.NET and Javascript)

[btreddy]

In my web page I have a linkbutton with onClientClick event as show below.

<asp:LinkButton ID="lnkbtn" Text="Click" runat="server" OnClientClick="dosomething(this.Text)"></asp:LinkButton>
 

And I've defined the function as shown below in the head section of the webpage

function dosomething(ObjCntxt) 
{ 
  var textval = ObjCntxt;
  alert(textval); 
} 
 

When I run the page and click on the LinkButton I'm getting the message 'undefined'.

I request you all kindly solve my problem.

Thanks & Regards,

BTR.

[Frinavale]

In JavaScript, there is no "Text" property for a hyperlink (which is what a LinkButton rendered as).

For example, your LinkButton:
<asp:LinkButton ID="lnkbtn" Text="Click" runat="server" OnClientClick="dosomething(this.Text)"></asp:LinkButton>

Will be rendered as this in HTML:
<a id="lnkbtn" name="lnkbtn" href="javascript:__doPostback('lnkbtn','');" onclick="dosomething(this.Text)">Click</a>

Since there is no "Text" property for a hyperlink, pass this.innerHTML to the JavaScript method "dosoemthing" instead. The innerHTML property will pass whatever is within the opening <a> and closing </a> tags....which is your Text.

Like this:
<asp:LinkButton ID="lnkbtn" Text="Click" runat="server" OnClientClick="dosomething(this.innerHTML)"></asp:LinkButton>

-Frinny