Multiple sitemaps in an ASP.NET project

Creating a sinle sitemap is easy. Just follow these steps:-
1) Write click on Project->Add New Item - >Select Sitemap
2) Default name is Web.sitemap (you can change the name if you want)
3) Click Ok

A web.sitemap is added to your solution
Now you can simply add SiteMapNodes.
1) All sitemapnodes should be under one sitemap Eg, "Home"
2) You can do nesting by adding one sitemap under another as per the flow of your website

Example,
<siteMapNode url ="~/Home.aspx" title="Home" description="">


     <siteMapNode url="~/Company.aspx" title="Companies" description="" >
      </siteMapNode>

    </siteMapNode>
    <siteMapNode url="~/Products.aspx" title="Services" description="" >
              <siteMapNode url="~/ProductsDetails.aspx" title="Product Details"/>
   </siteMapNode>

   <siteMapNode title="Categories" url="~/Category.aspx">
        <siteMapNode url="~/Electronics.aspx" title="Electronics">
        <siteMapNode url="~/Food.aspx" title="Food"/>
        <siteMapNode url="~/AutoMobiles.aspx" title="AutoMobiles"/>
        <siteMapNode url="~/Clothes.aspx" title="Clothes"/>
   </siteMapNode>
</siteMapNode>


Now your sitemap is created. To display it, add a new aspx page to your project. Add an asp control SiteMapDataSource and give it an ID. Drag a tree view control on it and set its DataSourceID to ID of the SitemapDataSource. Example,

<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" ShowStartingNode="false"  />
<asp:treeview ID="Treeview1" runat="server" DataSourceID="SiteMapDataSource1" >


But what if you want to add multiple sitemaps into your project???
Well the steps are simple again. Just keep on adding sitemaps to your project in the same way. But you need to make few changes in web.config.
In <system.web> add a tag <siteMap> and add Providers in it as shown:-

<siteMap>
<providers>

<add name="Components" type="System.Web.XmlSiteMapProvider" siteMapFile="~/Components.sitemap" />
<add name="AboutUs" type="System.Web.XmlSiteMapProvider" siteMapFile="~/AboutUs.sitemap" />
<add name="AboutYou" type="System.Web.XmlSiteMapProvider" siteMapFile="~/AboutYou.sitemap" />
</providers>
</siteMap>

In this I have created three SiteMaps -
Components.sitemap, AboutUs.sitemap, AboutYou.sitemap
 
And have specified their type as XmlSiteMapProvider and given them different IDs.
Now on your aspx page when you add asp control SitemapDataSource , add a new attribute to it "SiteMapProvider" and set its value to the ID field mentioned in Web.Config, as follows:-
<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" ShowStartingNode="false" SiteMapProvider="AboutUs" />


Everything else remains same.

I hope it helped you.
Cheers
Esha