104 lines
3.7 KiB
C#
104 lines
3.7 KiB
C#
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//
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// RouteValueExpressionBuilder.cs
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//
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// Authors:
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// Marek Habersack (mhabersack@novell.com)
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//
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// (C) 2010 Novell, Inc (http://novell.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.CodeDom;
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using System.ComponentModel;
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using System.Reflection;
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using System.Web.UI;
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using System.Web.Routing;
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namespace System.Web.Compilation
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{
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[ExpressionEditor ("System.Web.UI.Design.RouteValueExpressionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
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[ExpressionPrefix ("Routes")]
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public class RouteValueExpressionBuilder : ExpressionBuilder
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{
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public override bool SupportsEvaluate { get { return true; } }
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public RouteValueExpressionBuilder ()
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{
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}
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// This method is used only from within pages that aren't compiled
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public override object EvaluateExpression (object target, BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context)
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{
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// Mono doesn't use this, so let's leave it like that for now
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throw new NotImplementedException ();
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}
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public override CodeExpression GetCodeExpression (BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context)
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{
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if (entry == null)
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throw new NullReferenceException (".NET emulation (entry == null)");
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var ret = new CodeMethodInvokeExpression ();
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ret.Method = new CodeMethodReferenceExpression (new CodeTypeReferenceExpression (typeof (RouteValueExpressionBuilder)), "GetRouteValue");
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var thisref = new CodeThisReferenceExpression ();
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CodeExpressionCollection parameters = ret.Parameters;
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parameters.Add (new CodePropertyReferenceExpression (thisref, "Page"));
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parameters.Add (new CodePrimitiveExpression (entry.Expression));
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parameters.Add (new CodeTypeOfExpression (new CodeTypeReference (entry.DeclaringType)));
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parameters.Add (new CodePrimitiveExpression (entry.Name));
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return ret;
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}
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public static object GetRouteValue (Page page, string key, Type controlType, string propertyName)
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{
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RouteData rd = page != null ? page.RouteData : null;
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if (rd == null || String.IsNullOrEmpty (key))
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return null;
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object value = rd.Values [key];
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if (value == null)
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return null;
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if (controlType == null || String.IsNullOrEmpty (propertyName) || !(value is string))
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return value;
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PropertyDescriptorCollection pcoll = TypeDescriptor.GetProperties (controlType);
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if (pcoll == null || pcoll.Count == 0)
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return value;
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PropertyDescriptor pdesc = pcoll [propertyName];
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if (pdesc == null)
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return value;
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TypeConverter cvt = pdesc.Converter;
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if (cvt == null || !cvt.CanConvertFrom (typeof (string)))
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return value;
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return cvt.ConvertFrom (value);
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}
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}
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}
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