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Controlling Menus Programmatically in ASP.NET and C# (0 Comments)
Admin: Posted Date: April 4, 2010

This tutorial shows how we can use two Menu controls to display the SiteMap in a hierarchical structure. The second menu's display will depend upon the selection of the first menu. C# version.

Controlling Menus Programmatically in ASP.NET and C#


This tutorial shows how we can use two Menu controls to display the SiteMap in a hierarchical structure. The second menu's display will depend upon the selection of the first menu. C# version.

We need to create a Web.sitemap:

<?xml version="1.0" encoding="utf-8" ?>
<siteMap>
<siteMapNode title="Home">
<siteMapNode title="Products">
<siteMapNode title="Hardware" url="Default.aspx?node=hardware">
<siteMapNode title="Monitors"/>
<siteMapNode title="Speakers"/>
<siteMapNode title="Input Devices"/>
<siteMapNode title="Printers"/>
<siteMapNode title="Hard Drives"/>
</siteMapNode>
<siteMapNode title="Software" url="Default.aspx?node=software">
<siteMapNode title="Operating Systems"/>
<siteMapNode title="Email"/>
<siteMapNode title="Internet"/>
<siteMapNode title="Word Processor"/>
<siteMapNode title="Database"/>
</siteMapNode>
<siteMapNode title="How-Tos" url="Default.aspx?node=howtos">
<siteMapNode title="How To Program"/>
<siteMapNode title="How To Debug"/>
<siteMapNode title="How To Test"/>
</siteMapNode>
</siteMapNode>
<siteMapNode title="Services">
<siteMapNode title="Consultation" url="Default.aspx?node=consultation">
<siteMapNode title="Processes"/>
<siteMapNode title="Management"/>
<siteMapNode title="Recruiting"/>
</siteMapNode>
<siteMapNode title="Development" url="Default.aspx?node=development">
<siteMapNode title="Web Apps"/>
<siteMapNode title="Enterprise Apps"/>
<siteMapNode title="Database"/>
</siteMapNode>
</siteMapNode>
<siteMapNode title="Support">
<siteMapNode title="Downloads" url="Default.aspx?node=downloads">
<siteMapNode title="Audio Drivers"/>
<siteMapNode title="Network Adapter Drivers"/>
<siteMapNode title="Printer Drivers"/>
<siteMapNode title="Graphics Drivers"/>
</siteMapNode>
<siteMapNode title="Manuals" url="Default.aspx?node=manuals">
<siteMapNode title="Applications"/>
<siteMapNode title="Troubleshooting"/>
<siteMapNode title="Installation"/>
<siteMapNode title="Internet"/>
</siteMapNode>
</siteMapNode>
</siteMapNode>
</siteMap>


 

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There are two SiteMapDataSources; one for the first menu, and one for the second menu. The second SiteMapDataSource has the StartingNodeUrl set to
Default.aspx?node=hardware
The ASPX code:

<form id="form1" runat="server">
<div>
<asp:Menu ID="Menu1" runat="server" DataSourceID="SiteMapDataSource1" MaximumDynamicDisplayLevels="0" OnMenuItemClick="Menu1_MenuItemClick" Orientation="Horizontal">
<DataBindings>
<asp:MenuItemBinding DataMember="SiteMapNode" TextField="Title" />
</DataBindings>
</asp:Menu>
<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" ShowStartingNode="False" />
<br />
<asp:Menu ID="Menu2" runat="server" DataSourceID="SiteMapDataSource2" Orientation="Horizontal">
</asp:Menu>
<asp:SiteMapDataSource ID="SiteMapDataSource2" runat="server" ShowStartingNode="False" StartingNodeOffset="-1" StartingNodeUrl="Default.aspx?node=hardware" />
<br />
<br />
</div>
</form>

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The C# code for the Click event for the first menu should look something like this:



protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
{
switch(e.Item.Value)
{
case "Products":
SiteMapDataSource2.StartingNodeUrl = "Default.aspx?node=hardware";
return;
case "Services":
SiteMapDataSource2.StartingNodeUrl = "Default.aspx?node=consultation";
return;
case "Support":
SiteMapDataSource2.StartingNodeUrl = "Default.aspx?node=downloads";
return;
}
}

 

 

 
 
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