/// <summary>
/// Gets the value of a properties property.
/// </summary>
/// <param name="setting"></param>
/// <param name="value">The value of the specified profile property, typed as <see cref="System.Object"/>.</param>
/// <returns>The result segnaled.</returns>
protected virtual bool GetPropertyValue(SiteSettingsProperty setting, out object value)
{
Initialize();
if (!values.Contains(setting))
{
value = null;
return false;
}
value = values[setting].Value;
return true;
}
protected virtual bool SetPropertyValue(SiteSettingsProperty setting, object value)
{
Initialize();
var property = values[setting];
if (property == null)
{
property = new SiteSettingsPropertyValue(setting);
values.Add(property);
}
property.Value = value;
return true;
}
private MethodBuilder CreateGetter(SiteSettingsProperty setting, PropertyInfo property, FieldInfo backingField)
{
var methodBuilder = proxy
.DefineMethod("get_" + property.Name,
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName,
property.PropertyType,
Type.EmptyTypes);
var generator = methodBuilder.GetILGenerator();
var result = generator.DeclareLocal(typeof(Object));
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldfld, backingField);
generator.Emit(OpCodes.Ldloca_S, result);
generator.EmitCall(OpCodes.Callvirt, getPropertyMethod, Type.EmptyTypes);
var label = generator.DefineLabel();
generator.Emit(OpCodes.Brtrue_S, label);
if (setting.DefaultValue != null)
{
var defaultValueMethod = typeof (SiteSettingsProperty)
.GetProperty("DefaultValue")
.GetGetMethod();
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldfld, backingField);
generator.Emit(OpCodes.Callvirt, defaultValueMethod);
generator.Emit(OpCodes.Stloc_0);
}
else
{
generator.Emit(OpCodes.Newobj, typeof (Exception).GetConstructor(Type.EmptyTypes));
generator.Emit(OpCodes.Throw);
}
generator.MarkLabel(label);
generator.Emit(OpCodes.Ldloc_0);
generator.Emit(property.PropertyType.IsValueType
? OpCodes.Unbox_Any
: OpCodes.Castclass,
property.PropertyType);
generator.Emit(OpCodes.Ret);
return methodBuilder;
}
private static void GenerateDefaultValue(ILGenerator generator, SiteSettingsProperty setting)
{
if (setting.DefaultValue == null)
{
generator.Emit(OpCodes.Ldnull);
return;
}
var tc = Type.GetTypeCode(setting.PropertyType);
switch (tc)
{
case TypeCode.Byte:
{
generator.Emit(OpCodes.Ldc_I4_S, (byte)setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.Char:
{
generator.Emit(OpCodes.Ldc_I4_S, (char)setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.UInt16:
{
generator.Emit(OpCodes.Ldc_I4, (ushort)setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.Int32:
{
generator.Emit(OpCodes.Ldc_I4_S, (int) setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.UInt64:
{
generator.Emit(OpCodes.Ldc_I8, (ulong) setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.Int64:
{
generator.Emit(OpCodes.Ldc_I8, (long) setting.DefaultValue);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
case TypeCode.String:
{
generator.Emit(OpCodes.Ldstr, (string)setting.DefaultValue);
}
break;
case TypeCode.Boolean:
{
generator.Emit((bool)setting.DefaultValue ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0);
generator.Emit(OpCodes.Box, setting.PropertyType);
}
break;
default:
throw new NotSupportedException();
}
}