PowerBuilder

Serialize / Deserialize Hashtable to/from XML

Demonstrates how to seralize / deserialize a Hashtable to/from XML.

Note: This example requires Chilkat v9.5.0.64 or later.

PowerBuilder

integer li_rc
oleobject loo_HashTab
oleobject loo_Sb
oleobject loo_HashTab2
oleobject loo_STable
integer i
integer li_NumKeys
string ls_Key

// Note: This example requires Chilkat v9.5.0.64 or later.

// Add some entries to a hashtable.
loo_HashTab = create oleobject
li_rc = loo_HashTab.ConnectToNewObject("Chilkat.Hashtable")
if li_rc < 0 then
    destroy loo_HashTab
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_HashTab.AddStr("aaa","111")
loo_HashTab.AddStr("bbb","222")
loo_HashTab.AddStr("ccc","333")

// Serialize to XML
loo_Sb = create oleobject
li_rc = loo_Sb.ConnectToNewObject("Chilkat.StringBuilder")

loo_HashTab.ToXmlSb(loo_Sb)
Write-Debug loo_Sb.GetAsString()
Write-Debug "---"

// The output is as follows.  Each hash table entry
// is contained in an "e" node.  The entry's key
// is in the "k" node, and the value in the "v" node.

// <?xml version="1.0" encoding="utf8-8"?>
// <hashtable>
// <e><k>aaa</k><v>111</v></e>
// <e><k>bbb</k><v>222</v></e>
// <e><k>ccc</k><v>333</v></e>
// </hashtable>
// 

// Now load (deserialize) into a new hash table.
loo_HashTab2 = create oleobject
li_rc = loo_HashTab2.ConnectToNewObject("Chilkat.Hashtable")

loo_HashTab2.AddFromXmlSb(loo_Sb)

// Get the hash table keys, and lookup each (to show 
// that the hash table was correctly deserialized).
// The GetKeys method can return the keys in any order.
loo_STable = create oleobject
li_rc = loo_STable.ConnectToNewObject("Chilkat.StringTable")

loo_HashTab2.GetKeys(loo_STable)

i = 0
li_NumKeys = loo_STable.Count
do while i < li_NumKeys
    ls_Key = loo_STable.StringAt(i)
    Write-Debug ls_Key + ": " + loo_HashTab2.LookupStr(ls_Key)
    i = i + 1
loop


destroy loo_HashTab
destroy loo_Sb
destroy loo_HashTab2
destroy loo_STable