Silverlight使用HttpWebRequest和HttpWebResponse时发生System.Security.SecurityException: 安全性错误

大佬教程收集整理的这篇文章主要介绍了Silverlight使用HttpWebRequest和HttpWebResponse时发生System.Security.SecurityException: 安全性错误，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

概述

异常代码发生在第二句 httpWebrequest request = result.AsyncState as httpWebrequest; WebResponse response = request.EndGetResponse(result); 提示信息： System.Security.SecurityException ---> System.Security.SecurityExc @H_616_14@

异常代码发生在第二句

httpWebrequest request = result.AsyncState as httpWebrequest;

WebResponse response = request.EndGetResponse(result);

提示信息：

System.Security.SecurityException ---> System.Security.SecurityException: 安全性错误。

   位于 System.Net.browser.browserhttpWebrequest.InternalEndGetResponse(IAsyncResult asyncResult)
   位于 System.Net.browser.browserhttpWebrequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendStatE)
   位于 System.Net.browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendStatE)
   --- 内部异常堆栈跟踪的结尾 ---
   位于 System.Net.browser.AsyncHelper.beginOnUI(SendOrPostCallBACk beginMethod,Object statE)
   位于 System.Net.browser.browserhttpWebrequest.EndGetResponse(IAsyncResult asyncResult)

   位于 SilverlightApplication2.MainPage.ResponseCallBACk(IAsyncResult result)

解决：

   在\webapps\ROOT\下增加两个文件：

   crossdomain.xml和clientaccesspolicy.xml

------------------------------------------------------------------------

--crossdomain.xml--

------------------------------------------------------------------------

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYstem " http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<site-control permitted-cross-domain-policies="all" />
<allow-access-from domain="*"/>
<allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

------------------------------------------------------------------------

--clientaccesspolicy.xml--

------------------------------------------------------------------------

<?xml version="1.0" encoding="utf-8"?>             <access-policy> @R_262_1748@ <cross-domain-access> @R_262_1748@   <policy> @R_262_1748@     <allow-from http-request-headers="*"> @R_262_1748@       <domain uri="*"/> @R_262_1748@     </allow-from> @R_262_1748@     <grant-to> @R_262_1748@       <resource path="/" include-subpaths="true"/> @R_262_1748@     </grant-to> @R_262_1748@   </policy> @R_262_1748@ </cross-domain-access>             </access-policy>