Silverlight提供了两种方式实现不同域之间的访问。分别是

（1）Silverlight 客户端访问策略文件 (clientaccesspolicy.xml), 

 

<?xml version="1.0" encoding="utf-8"?>

  <access-policy>
    <cross-domain-access>
      <policy>
        <allow-from http-request-headers="SOAPAction">
          <domain uri="*"/>
        </allow-from>
        <grant-to>
          <resource path="/Resource/" include-subpaths="true"/>
        </grant-to>
     </policy>
      <policy >
        <allow-from http-methods="*">
          <domain uri="www.XX.com"/>
        </allow-from>
        <grant-to>
          <resource path="/Resource/" include-subpaths="true"/>
        </grant-to>
     </policy>
    </cross-domain-access>
  </access-policy>

 

 

        跨域策略文件格式
    <?xml version="1.0"?>
    <!DOCTYPE cross-domain-policy SYSTEM
     "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
    <cross-domain-policy>
       <allow-access-from domain="*"/ headers="SOAPAction" 
         secure="true">
    </cross-domain-policy>
需要特别注意的是clientaccesspolicy.xml需要放在服务器的根目录下。