public static bool TryGetGuidValue(this IPortableDeviceValues values, PropertyKey key, out Guid value)
{
if (values.HasKeyValue(key))
{
values.GetGuidValue(ref key, out value);
return(true);
}
value = Guid.Empty;
return(false);
}
public static bool TryGetIUnknownValue(this IPortableDeviceValues values, PropertyKey key, out object value)
{
if (values.HasKeyValue(key))
{
values.GetIUnknownValue(ref key, out value);
return(true);
}
value = null;
return(false);
}
public static bool TryGetSignedIntegerValue(this IPortableDeviceValues values, PropertyKey key, out int value)
{
if (values.HasKeyValue(key))
{
values.GetSignedIntegerValue(ref key, out value);
return(true);
}
value = 0;
return(false);
}
public static bool TryGetBoolValue(this IPortableDeviceValues values, PropertyKey key, out bool value)
{
if (values.HasKeyValue(key))
{
int val;
values.GetBoolValue(ref key, out val);
value = val != 0;
return(true);
}
value = false;
return(false);
}
internal static bool TryGetValue(this IPortableDeviceValues values, PropertyKey key, out PropVariantFacade value)
{
if (values.HasKeyValue(key))
{
PropVariantFacade val = new PropVariantFacade();
values.GetValue(ref key, out val.Value);
value = val;
return(true);
}
value = null;
return(false);
}
public static bool TryGetDateTimeValue(this IPortableDeviceValues values, PropertyKey key, out DateTime?value)
{
if (values.HasKeyValue(key))
{
using (PropVariantFacade val = new PropVariantFacade())
{
values.GetValue(ref key, out val.Value);
value = val.ToDate();
}
return(true);
}
value = null;
return(false);
}