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Proper way to use JQuery when using MasterPages in ASP.NET?

I have no issues when doing using JQuery in a aspx page without a masterpage, but when I try to use it in pages that have a masterpage, it doesn't work, so I end up putting the jquery files and other script files in the page instead of the master. Now if I have 10 pages, I am doing this for all 10, which I know is incorrect. In the sample masterpage below, where would I put my script files.

<html>
<head runat="server">
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <asp:ContentPlaceHolder ID="ContentPanel" runat="server">
    </asp:ContentPlaceHolder>            
</body>
</html>

I recently used the fancybox plugin and what I did was instead of putting the jquery script and fancybox scripts in the masterpage because I got frustrated on getting it to work, I just put it in the page where I wanted the script to run, specifically at the bottom, right before the closing asp:Content. Of course, now I have the issue of, if I wanted to use the fancybox plugin in other pages, I would put the jquery script and fancybox script on all 5 pages instead of just the masterpage. When dealing with masterpages, where does everything go using my example above?

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1 Answer

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You would declare your main jQuery scripts within the master page, as you would normally:

<head runat="server">
  <link href="/Content/Interlude.css" rel="Stylesheet" type="text/css" />
  <script type="text/javascript" src="/Scripts/jquery-1.3.2.min.js"></script>
  <asp:ContentPlaceHolder ID="head" runat="server">
  </asp:ContentPlaceHolder>
</head>

And then any page specific JS files could be loaded within the Content controls that reference the Head ContentPlaceholder.

However, a better option would be to look into the ScriptManager and ScriptManagerProxy controls - these can provide you with a lot more control over the way your JS files are served to the client.

So you would place a ScriptManager control in you master page, and add a reference to the jQuery core code in that:

<body>
  <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
      <Scripts>
        <asp:ScriptReference Path="/Scripts/jquery-1.3.2.min.js" />
      </Scripts>
    </asp:ScriptManager>

Then, in your page that requires some custom JS files, or a jQuery plugin, you can have:

<asp:Content ID="bodyContent" ContentPlaceholderID="body">
  <asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
      <Scripts>
        <asp:ScriptReference Path="/Scripts/jquery.fancybox-1.2.1.pack.js" />
      </Scripts>
  </asp:ScriptManagerProxy>

The ScriptManager allows you to do things like control where on the page scripts are rendered with LoadScriptsBeforeUI (or better yet, after by setting it to False).


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