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