65 lines
2.1 KiB
C#
65 lines
2.1 KiB
C#
|
//-----------------------------------------------------------------------------
|
|||
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|||
|
|
//-----------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
namespace System.Activities.XamlIntegration
|
|||
|
|
{
|
|||
|
|
using System;
|
|||
|
|
using System.ComponentModel;
|
|||
|
|
using System.Windows.Markup;
|
|||
|
|
using System.Xaml;
|
|||
|
|
|
|||
|
|
public sealed class ActivityWithResultValueSerializer : ValueSerializer
|
|||
|
|
{
|
|||
|
|
static ActivityWithResultValueSerializer valueSerializer;
|
|||
|
|
|
|||
|
|
public override bool CanConvertToString(object value, IValueSerializerContext context)
|
|||
|
|
{
|
|||
|
|
if (AttachablePropertyServices.GetAttachedPropertyCount(value) > 0)
|
|||
|
|
{
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
else if (value != null &&
|
|||
|
|
value is IValueSerializableExpression &&
|
|||
|
|
((IValueSerializableExpression)value).CanConvertToString(context))
|
|||
|
|
{
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override string ConvertToString(object value, IValueSerializerContext context)
|
|||
|
|
{
|
|||
|
|
IValueSerializableExpression ivsExpr;
|
|||
|
|
|
|||
|
|
ivsExpr = value as IValueSerializableExpression;
|
|||
|
|
if (ivsExpr == null)
|
|||
|
|
{
|
|||
|
|
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CannotSerializeExpression(value.GetType())));
|
|||
|
|
}
|
|||
|
|
return ivsExpr.ConvertToString(context);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
internal static bool CanConvertToStringWrapper(object value, IValueSerializerContext context)
|
|||
|
|
{
|
|||
|
|
if (valueSerializer == null)
|
|||
|
|
{
|
|||
|
|
valueSerializer = new ActivityWithResultValueSerializer();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return valueSerializer.CanConvertToString(value, context);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
internal static string ConvertToStringWrapper(object value, IValueSerializerContext context)
|
|||
|
|
{
|
|||
|
|
if (valueSerializer == null)
|
|||
|
|
{
|
|||
|
|
valueSerializer = new ActivityWithResultValueSerializer();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return valueSerializer.ConvertToString(value, context);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|