FileUpLoad控件上传大容量文件

在Web.Config文件中设置

<system.web>
  <httpRuntime executionTimeout="240" maxRequestLength="20480" />
</system.web>

在运行时取得WebConfig文件中的最大文件配置信息

WebConfigurationManager(命名控件：System.Web.Configuration)

System.Configuration.Configuration config = WebConfigurationManager.OpenWebConfiguration("~");
HttpRuntimeSection section = config.GetSection("system.web/httpRuntime") as HttpRuntimeSection;
double maxFileSize = Math.Round(section.MaxRequestLength / 1024.0, 1);
FileSizeLimit.Text = string.Format("Make sure your file is under {0:0.#} MB.", maxFileSize);

参考资料：http://www.infoq.com/cn/news/2008/01/handling-large-uploads

         http://aspnetresources.com/articles/dark_side_of_file_uploads.aspx

         http://www.aspnetresources.com/articles/CustomErrorPages.aspx

外文博客：http://weblogs.asp.net/jgalloway/