ComArray.Item
Returns an item by index or by key from an Array, List or Dictionary collection.
This works on (keytype):
- Array (int)
- Array List (int)
- IList (int)
- ICollection (any type)
- HashSet (any type)
- IDictionary (key type) (or int for index)
You can specify either an integer for list types or any type for collections. int keys are 0 based.
For dictionaries
intvalues retrieve the item at the specified indexed location, unless the Dictionary key type isint.If the key type is
int(or a FoxPro number) theintkey is treated as a key value, rather than an index. For all other key types, the key is treated as an index.
public object Item(object indexOrKey)
matching item or null
Parameters
indexOrKey
int 0 based key for lists or any value for collections/dicionaries
Remarks
Dictionaries can use an int value to return a value out of the collection by its index **if the key type is not of System.Int. This is a special case and allows you to iterate a dictionary which otherwise would not be possible.
Example
foxpro
foxpro
*** Access generic list through indirect access through Proxy and get ComArray
loList = loBridge.InvokeMethod(loNet,"GetGenericList")
? loBridge.ToString(loList) && System.Collections.Generic.List...
? loList.Count && 2
*** Grab an item by index
loCust = loList.Item(0)
? loCust.Company
*** Iterate the list
FOR lnX = 0 TO loList.Count -1
loItem = lolist.Item(lnX)
? loItem.Company
ENDFOR
foxpro
foxpro
*** Retrieve a generic dictionary
loList = loBridge.InvokeMethod(loNet,"GetDictionary")
? loList.Count && 2
*** Return Item by Key
loCust = loList.Item("Item1") && Retrieve item by Key
? loCust.Company
*** This works as long as the key type is not int
loCust = loList.Item(0) && Retrieve item by Index
? loCust.Company
*** This allows iterating a dictionary
FOR lnX = 0 TO loList.Count -1
loItem = lolist.Item(lnX)
? loItem.Company
ENDFOR
See also
Class ComArray
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