public static bool IsExistsIndexedValue(Object value, int index)
{
if (value == null)
{
return(false);
}
var asArray = value as Array;
if (asArray != null)
{
return(asArray.Length > index);
}
var asString = value as string;
if (asString != null)
{
return(asString.Length > index);
}
var asType = value.GetType();
var asGenericList = asType.FindGenericInterface(typeof(IList <>));
if (asGenericList != null)
{
var asList = MagicMarker.GetListFactory(value.GetType()).Invoke(value);
return(asList.Count > index);
}
return(false);
}
public static Object GetIndexedValue(Object value, int index)
{
if (value == null)
{
return(null);
}
var asArray = value as Array;
if (asArray != null)
{
if (asArray.Length <= index)
{
return(null);
}
return(asArray.GetValue(index));
}
var asString = value as string;
if (asString != null)
{
if (asString.Length <= index)
{
return(null);
}
return(asString[index]);
}
var asType = value.GetType();
var asGenericList = asType.FindGenericInterface(typeof(IList <>));
if (asGenericList != null)
{
var asList = MagicMarker.GetListFactory(value.GetType()).Invoke(value);
if (asList.Count <= index)
{
return(null);
}
return(asList[index]);
}
return(null);
}
public static IList <object> AsObjectList(this object value)
{
if (value == null)
{
return(null);
}
else if (value is IList <object> asList)
{
return(asList);
}
else if (value.GetType().IsGenericList())
{
return(MagicMarker
.GetListFactory(value.GetType())
.Invoke(value));
}
throw new ArgumentException("invalid value for object list");
}
