// FhirPath toDecimal() function
public static decimal?ToDecimal(this IElementNavigator focus)
{
var val = focus.getValue <object>("focus");
if (val is decimal)
{
return((decimal)val);
}
else if (val is string)
{
try
{
return(XmlConvert.ToDecimal((string)val));
}
catch
{
return(null);
}
}
else if (val is bool)
{
return((bool)val ? 1m : 0m);
}
return(null);
}
// FhirPath toString() function
public static string ToStringRepresentation(this IElementNavigator focus)
{
var val = focus.getValue <object>("focus");
if (val is string)
{
return((string)val);
}
else if (val is long)
{
return(XmlConvert.ToString((long)val));
}
else if (val is decimal)
{
return(XmlConvert.ToString((decimal)val));
}
else if (val is bool)
{
return((bool)val ? "true" : "false");
}
else if (val is Time)
{
return(((Time)val).ToString());
}
else if (val is PartialDateTime)
{
return(((PartialDateTime)val).ToString());
}
return(null);
}
// FhirPath toInteger() function
public static long?ToInteger(this IElementNavigator focus)
{
var val = focus.getValue <object>("focus");
if (val is long)
{
return((long)val);
}
else if (val is string)
{
try
{
return(XmlConvert.ToInt64((string)val));
}
catch
{
return(null);
}
}
else if (val is bool)
{
return((bool)val ? 1L : 0L);
}
return(null);
}