Here is another way to access master page controls. This way has a bit less coding then my previous post on the subject. The scenario would be that you have a master page with a few navigation
buttons at the top for users to navigate the app. After a button is clicked the corresponding aspx page would load in the ContentPlaceHolder. To make it easier for the users to see what page they are on I wanted the clicked navigation button to change color. This would be a quick visual for the user and is useful when inevitably they are interrupted with something else and cannot get back to what they were doing for a little while. Anyway the code is something like this.
Master page:
<body>
<form id="form1" runat="server">
<div id="header">
<asp:Panel ID="Panel1" runat="server" CssClass="panelHeader" Width="100%">
<center>
<label style="font-size: large; color: White;">Test Application</label>
</center>
<asp:Button ID="btnPage1" runat="server" Text="Page1" PostBackUrl="~/Page1.aspx" CssClass="navButton"/>
<asp:Button ID="btnPage2" runat="server" Text="Page2" PostBackUrl="~/Page2.aspx" CssClass="navButton"/>
<br />
</asp:Panel>
<br />
</div>
<div>
<asp:scriptmanager ID="Scriptmanager1" runat="server"></asp:scriptmanager>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
Page 1:
VB
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim clickedButton As Button = Master.FindControl("btnPage1")
clickedButton.CssClass = "navButtonClicked"
End Sub
CSharp
protected void Page_Load(object sender, EventArgs e)
{
Button clickedButton;
clickedButton = (Button)Master.FindControl("btnPage1");
clickedButton.CssClass = "navButtonClicked";
}
CSS:
.navButton
{
background-color: White;
border: 1px #4e667d solid;
color: #2275a7;
display: inline;
line-height: 1.35em;
text-decoration: none;
white-space: nowrap;
width: 100px;
text-align: center;
margin-bottom: 10px;
margin-left: 5px;
height: 30px;
}
.navButtonClicked
{
background-color:#FFFF86;
border: 1px #4e667d solid;
color: #2275a7;
display: inline;
line-height: 1.35em;
text-decoration: none;
white-space: nowrap;
width: 100px;
text-align: center;
margin-bottom: 10px;
margin-left: 5px;
height: 30px;
}
The idea is pretty simple, use FindControl for the master page in the page load of your aspx page. In the example I changed the CssClass for the aspx page's corresponding button to navButtonClicked which has a different background-color and makes the clicked button stand out.
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