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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / DynamicDataRoute.cs / 1305376 / DynamicDataRoute.cs
using System.Web.Routing; using System.Diagnostics; namespace System.Web.DynamicData { ////// Route used by Dynamic Data /// public class DynamicDataRoute : Route { internal const string ActionToken = "Action"; internal const string TableToken = "Table"; internal const string ModelToken = "__Model"; private MetaModel _model; private bool _initialized; private object _initializationLock = new object(); ////// Construct a DynamicDataRoute /// /// url passed to the base ctor [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "This is a URL template with special characters, not just a regular valid URL.")] public DynamicDataRoute(string url) : base(url, new DynamicDataRouteHandler()) { } ////// Name of the table that this route applies to. Can be omitted. /// public string Table { get; set; } ////// Action that this route applies to. Can be omitted. /// public string Action { get; set; } ////// The ViewName is the name of the page used to handle the request. If omitted, it defaults to the Action name. /// public string ViewName { get; set; } ////// The MetaModel that this route applies to /// public MetaModel Model { get { return _model ?? MetaModel.Default; } set { _model = value; } } // Make sure that if the Table or Action properties were used, they get added to // the Defaults dictionary private void EnsureRouteInitialize() { if (!_initialized) { lock (_initializationLock) { if (!_initialized) { _initialized = true; // Give the model to the handler Debug.Assert(Model != null); RouteHandler.Model = Model; // If neither was specified, we don't need to do anything if (Table == null && Action == null) return; // If we don't already have a Defaults dictionary, create one if (Defaults == null) Defaults = new RouteValueDictionary(); if (Table != null) { // Try to get the table just to cause a failure if it doesn't exist var metaTable = Model.GetTable(Table); Defaults[TableToken] = Table; } if (Action != null) Defaults[ActionToken] = Action; } } } } ////// See base class documentation /// public override RouteData GetRouteData(HttpContextBase httpContext) { EnsureRouteInitialize(); // Try to get the route data for this route RouteData routeData = base.GetRouteData(httpContext); // If not, we're done if (routeData == null) { return null; } // Add all the query string values to the RouteData // AddQueryStringParamsToRouteData(httpContext, routeData); // Check if the route values match an existing table and if they can be served by a scaffolded or custom page if (!VerifyRouteValues(routeData.Values)) return null; return routeData; } internal static void AddQueryStringParamsToRouteData(HttpContextBase httpContext, RouteData routeData) { foreach (string key in httpContext.Request.QueryString) { // Don't overwrite existing items if (!routeData.Values.ContainsKey(key)) { routeData.Values[key] = httpContext.Request.QueryString[key]; } } } ////// See base class documentation /// public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values) { EnsureRouteInitialize(); // Check if the route values include a MetaModel object modelObject; if (values.TryGetValue(ModelToken, out modelObject)) { var model = modelObject as MetaModel; if (model != null) { // If it's different from the one for this route, fail the route matching if (modelObject != Model) return null; // It has the right model, so we want to continue. But we first need to // remove this token so it doesn't affect the path values.Remove(ModelToken); } } // Call the base to try to generate a path from this route VirtualPathData virtualPathData = base.GetVirtualPath(requestContext, values); // If not, we're done if (virtualPathData == null) return null; // Check if the route values match an existing table and if they can be served by a scaffolded or custom page if (VerifyRouteValues(values)) { return virtualPathData; } else { return null; } } private bool VerifyRouteValues(RouteValueDictionary values) { // Get the MetaTable and action. If either is missing, return false to skip this route object tableNameObject, actionObject; if (!values.TryGetValue(TableToken, out tableNameObject) || !values.TryGetValue(ActionToken, out actionObject)) { return false; } MetaTable table; // If no table by such name is available, return false to move on to next route. if (!Model.TryGetTable((string)tableNameObject, out table)) { return false; } // Check if n Page can be accessed for the table/action (either scaffold or custom). // If not, return false so that this route is not used and the search goes on. return RouteHandler.CreateHandler(this, table, (string)actionObject) != null; } ////// Extract the MetaTable from the RouteData. Fails if it can't find it /// /// The route data ///The found MetaTable public MetaTable GetTableFromRouteData(RouteData routeData) { string tableName = routeData.GetRequiredString(TableToken); return Model.GetTable(tableName); } ////// Extract the Action from the RouteData. Fails if it can't find it /// /// The route data ///The found Action public string GetActionFromRouteData(RouteData routeData) { return routeData.GetRequiredString(ActionToken); } ////// Strongly typed version of Route.RouteHandler for convenience /// public new DynamicDataRouteHandler RouteHandler { get { return (DynamicDataRouteHandler)base.RouteHandler; } set { base.RouteHandler = value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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