I have like 10 aspx pages (junior_class_students1.aspx-...10.aspx). They all have the same master page in the back (class_students.master). Everytime i load a page i want the master page background-color to change, to the one that i can specify per page. so ...students1.aspx then .master ...students2.aspx then .master ...students3.aspx then .master
how can this be achieved?
CSS classes.
You could place a div that fills the body inside on body and contentplaceholder.
Master Page
<body>
<asp:ContentPlaceHolder id="cph" runat="server" />
</body>
That div could have a uniuqe ID per page.
Cntent page
<asp:Content id="cnt" ContentPlaceHolderID="cph">
<div id="Page1" class="container">
<!--Page Content-->
</div>
</asp:Content>
Then CSS could be something like:
div.container
{
width: 100%;
height: 100%;
}
div#Page1
{
background-color: green;
}
div#Page2
{
background-color: blue;
}
...
Keep in mind that content holders can go anywhere in the page. It's possible to do something like this:
<div style="background-color:<asp:ContentPlaceHolder id="divColor" runat="server" />"></div>
And then in your page have this:
<asp:Content ID="divColorContent" ContentPlaceHolderID="divColor" Runat="Server">green</asp:Content>