SiteMapPath控件不显示结点内容
先新建了一个Web.sitemap文件，代码如下：

<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
  <siteMapNode url="Default.aspx" title="Home" description="Home Page">
  <siteMapNode url="News.aspx" title="News" description="The Latest News"/>
  <siteMapNode url="News.aspx?cat=us" title="U.S" description="U.S. News"/>
  <siteMapNode title ="World" description="World News" url="News.aspx?cat=world"/>
  <siteMapNode title="Technology" description="Technology News" url="News.aspx?cat=tech"/>
  <siteMapNode title="Sports" description="Sports News" url="News.aspx?cat=sport"/>  
  </siteMapNode>
  <siteMapNode title="Finance" description="The Latest Financial Information" url="Finance.aspx">
  <siteMapNode title="Quotes" description="Get the Latest Quotes" url="Quotes.aspx">
  <siteMapNode title="Markets" description="The Latest Market Information" url="Markets.aspx">
  <siteMapNode title="U.S. Market Report" description="Looking at the U.S. Market" url="MarketsUS.aspx"/>
  <siteMapNode title="NYSE" description="The New York Stock Exchange" url="NYSE.aspx"/>
  </siteMapNode>
  <siteMapNode title="Funds" description="Mutual Funds" url="Funds.aspx"/>
  </siteMapNode>
  <siteMapNode title="Weather" description="The Latest Weather" url="Weather.aspx"/>
  </siteMapNode>
</siteMap>

然后建了一个Web窗体，拖了一个SiteMapPath控件，代码如下：
<asp:SiteMapPath ID="SiteMapPath1" runat="server"/>
  </asp:SiteMapPath>

在浏览器中查看，为什么什么都没有呢？定义在Web.sitemap中的结点都没有显示。

------解决方案--------------------
先在Web.config文件中配置,然后设置SiteMapPath 控件中的SiteMapProvider属性