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WebForms使用System.Web.Routing

www.jz123.cn  2009-12-28   来源:   中国建站    责任编辑(袁袁)    我要投递新闻

  在Web应用程序开发过程中利用ASP.NET MVC框架的实战技巧 ,Routing现在可以作为URLRewriting技术的替代者,出现在asp.net mvc框架中,将它应用于WebForms上也是很简单的,可以到codeplex上下载ASP.NET MVC WebFormRouting Demo 。

  实现的原理也是很简单的:

  1、创建一个自定义的实例化你的页面的 IRouteHandler

  1: public class WebFormRouteHandler : IRouteHandler {

  2:

  public

  WebFormRouteHandler(string

  virtualPath) 3:

  : this

  (virtualPath, true

  ) { 4:

  } 5:

  6:

  public

  WebFormRouteHandler(string

  virtualPath, bool

  checkPhysicalUrlAccess) { 7:

  if

  (virtualPath == null

  ) { 8:

  throw

  new

  ArgumentNullException("virtualPath"

  ); 9:

  } 10:

  11:

  if

  (!virtualPath.StartsWith("~/"

  )) { 12:

  throw

  new

  ArgumentException("virtualPath must start with a tilde slash: "~/""

  , "virtualPath"

  ); 13:

  } 14:

  15:

  this

  .VirtualPath = virtualPath; 16:

  this

  .CheckPhysicalUrlAccess = checkPhysicalUrlAccess; 17:

  } 18:

  19:

  /// <summary>

  20:

  /// This is the full virtual path (using tilde syntax) to the WebForm page.

  21:

  /// </summary>

  22:

  /// <remarks>

  23:

  /// Needs to be thread safe so this is only settable via ctor.

  24:

  /// </remarks>

  25:

  public

  string

  VirtualPath { get; private

  set; } 26:

  27:

  /// <summary>

  28:

  /// Because we're not actually rewriting the URL, ASP.NET's URL Auth will apply

  29:

  /// to the incoming request URL and not the URL of the physical WebForm page.

  30:

  /// Setting this to true (default) will apply URL access rules against the

  31:

  /// physical file.

  32:

  /// </summary>

  33:

  /// <value>True by default</value>

  34:

  public

  bool

  CheckPhysicalUrlAccess { get; set; } 35:

  36:

  public

  IHttpHandler GetHttpHandler(RequestContext requestContext) { 37:

  string

  virtualPath = GetSubstitutedVirtualPath(requestContext); 38:

  if

  (this

  .CheckPhysicalUrlAccess && !UrlAuthorizationModule.CheckUrlAccessForPrincipal(virtualPath, requestContext.HttpContext.User, requestContext.HttpContext.Request.HttpMethod)) 39:

  throw

  new

  SecurityException(); 40:

  41:

  var page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof

  (Page)) as

  IHttpHandler; 42:

  if

  (page != null

  ) { 43:

  //Pages that don't implement IRoutablePage won't have the RequestContext

  44:

  //available to them. Can't generate outgoing routing URLs without that context.

  45:

  var routablePage = page as

  IRoutablePage; 46:

  if

  (routablePage != null

  ) 47:

  routablePage.RequestContext = requestContext; 48:

  } 49:

  return

  page; 50:

  } 51:

  52:

  /// <summary>

  53:

  /// Gets the virtual path to the resource after applying substitutions based on route data.

  54:

  /// </summary>

  55:

  /// <param name="requestContext"></param>

  56:

  /// <returns></returns>

  57:

  public

  string

  GetSubstitutedVirtualPath(RequestContext requestContext) { 58:

  if

  (!VirtualPath.Contains("{"

  )) 59:

  return

  VirtualPath; 60:

  61:

  //Trim off ~/

  62:

  string

  virtualPath = VirtualPath.Substring(2); 63:

  64:

  Route route = new

  Route(virtualPath, this

  ); 65:

  VirtualPathData vpd = route.GetVirtualPath(requestContext, requestContext.RouteData.Values); 66:

  if

  (vpd == null

  ) 67:

  return

  VirtualPath; 68:

  return

  "~/"

  + vpd.VirtualPath; 69:

  } 70:

  }2、使用自定义的 IRouteHandler注册一个新的Routes

  1:

  public

  class

  Global : System.Web.HttpApplication 2:

  { 3:

  4:

  protected

  void

  Application_Start(object

  sender, EventArgs e) 5:

  { 6:

  RegisterRoutes(RouteTable.Routes); 7:

  } 8:

  9:

  public

  static

  void

  RegisterRoutes(RouteCollection routes) 10:

  { 11:

  //We are intentionally creating this backdoor as a demonstration of

  12:

  //bad security practices.

  13:

  routes.MapWebFormRoute("Secret"

  , "BackDoor"

  , "~/Admin/SecretPage.aspx"

  , false

  ); 14:

  routes.MapWebFormRoute("Blocked"

  , "FrontDoor"

  , "~/Admin/SecretPage.aspx"

  , true

  ); 15:

  16:

  //Even though we are not checking physical url access in this route, it should still block because the incoming

  17:

  //request url would start with /Admin.

  18:

  routes.MapWebFormRoute("Admin"

  , "Admin/{*anything}"

  , "~/Admin/SecretPage.aspx"

  , false

  ); 19:

  20:

  routes.MapWebFormRoute("Named"

  , "foo/bar"

  , "~/forms/blech.aspx"

  ); 21:

  routes.MapWebFormRoute("Numbers"

  , "one/two/three"

  , "~/forms/haha.aspx"

  ); 22:

  23:

  //Maps any requests for /haha/*.aspx to /forms/hahah.aspx

  24:

  routes.MapWebFormRoute("Substitution"

  , "haha/{filename}"

  , "~/forms/haha.aspx"

  ); 25:

  } 26:

  }相关文章:

  <span id="ctl00_ArticleTopHeader_ArticleTitle" class="ArticleTopTitle">Fight 404 errors with ASP.NET Routing :<a href="http://www.codeproject.com/KB/aspnet/routing404.aspx">http://www.codeproject.com/KB/aspnet/routing404.aspx</a></span>

  msdn杂志文章:

  使用 ASP.NET Web 窗体路由:http://msdn.microsoft.com/zh-cn/magazine/2009.01.extremeaspnet.aspx

  本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/dz45693/archive/2009/12/22/5058018.aspx

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