Silverlight 4.0 FileStream [英] Silverlight 4.0 FileStream

问题描述

FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);

参数:<<路径>>调试资源 字符串不可用.通常是钥匙 和论点提供足够的 诊断问题的信息. 看 http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.41108.0&File=mscorlib.dll&Key=FileSecurityState_OperationNotPermitted

Arguments: << path >> Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.41108.0&File=mscorlib.dll&Key=FileSecurityState_OperationNotPermitted

上面的代码行有一个错误[FileSecurityState_OperationNotPermitted]

The line of code above has an error [FileSecurityState_OperationNotPermitted]

推荐答案

听起来您的应用程序正在部分信任状态下运行.要使用FileStream，您需要请求升高信任:

It sounds like your application is running in partial trust. To use a FileStream, you'll need to request elevated trust:

默认情况下，基于Silverlight 应用程序以部分信任的方式运行， 这意味着它们在安全范围内运行 沙箱.沙盒应用程序有 限制访问本地 电脑，并受制于其他 防止恶意的方法 行为.

By default, Silverlight-based applications run in partial trust, which means they run within a security sandbox. Sandboxed applications have restricted access to the local computer and are constrained in other ways that help prevent malicious behavior.

从Silverlight 4 FileStream文档(重点是我的):

From the Silverlight 4 FileStream documentation (emphasis mine):

由高信任度调用时 应用程序，公开了一个流 一个文件，同时支持同步 和异步读写 操作.

When it is called by an elevated-trust application, exposes a Stream around a file, supporting both synchronous and asynchronous read and write operations.

您可以通过在Silverlight项目设置中设置在浏览器外运行时要求提升的信任度"来将应用程序设置为要求提升的信任度.

You can set an application to require elevated trust by setting the "Require elevated trust when running outside the browser" in your Silverlight project settings.

这篇关于Silverlight 4.0 FileStream的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！