Description
Gets the child item count in a JSON parser object.
Applies to
JSONParser objects
Syntax
objectname.GetChildCount ( ParentItemHandle )
|
Argument |
Description |
|---|---|
|
objectname |
The name of the JSONParser object whose item count you want to obtain. |
|
ParentItemHandle |
A long whose value is the handle of the parent item of JsonObjectItem or JsonArrayItem type. |
Return value
Long.
Returns the child item count if it succeeds and -1 if an error occurs. If any argument's value is null, the method returns null.
Example 1
This example gets the total number of child items and then gets the values of child items in a loop:
JsonParser lnv_JsonParser
Long ll_RootObject, ll_ChildCount, ll_Index
String ls_Json, ls_key
lnv_JsonParser = Create JsonParser
ls_Json = '{"id":1001, "name":"evan", "active":true}'
// Loads a JSON string
lnv_JsonParser.LoadString(ls_Json)
ll_RootObject = lnv_JsonParser.GetRootItem()
ll_ChildCount = lnv_JsonParser.GetChildCount(ll_RootObject)
// Obtains the values of child items
for ll_Index = 1 to ll_ChildCount
ls_key = lnv_JsonParser.GetChildKey(ll_RootObject, ll_Index)
next
Example 2
This example gets the total number of child items and then gets the value of every array item in a loop:
String ls_Json, ls_Name
Long ll_ChildCount, ll_Index, ll_Id
Datetime ldt_Birthday
JsonParser lnv_JsonParser
lnv_JsonParser = Create JsonParser
ls_Json = '[{"id":1, "name":"evan1", "birthday":2340323884}, {"id":2, "name":"evan2", "birthday":5340324801}]'
// Loads a JSON string
lnv_JsonParser.LoadString(ls_Json)
Long ll_ArrayItem = lnv_JsonParser.GetRootItem() // Root item is JsonArrayItem!
ll_ChildCount = lnv_JsonParser.GetChildCount(ll_ArrayItem)
// Get array item in a loop
for ll_Index = 1 to ll_ChildCount
// Get array item
Long ll_ObjectItem = lnv_JsonParser.GetChildItem(ll_ArrayItem, ll_Index)
// Array item is JsonObjectItem!
if lnv_JsonParser.GetItemType(ll_ObjectItem) = JsonObjectItem! then
ll_Id = lnv_JsonParser.GetItemNumber(ll_ObjectItem, "id")
ls_Name = lnv_JsonParser.GetItemString(ll_ObjectItem, "name")
ldt_Birthday = lnv_JsonParser.GetItemDateTime(ll_ObjectItem, "birthday")
end if
...
next
See also
