(PowerBuilder) JSON Date Parsing

Demonstrates how to parse date/time strings from JSON.

Note: This example uses the DtOf and DateOf methods introduced in Chilkat v9.5.0.73

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
integer li_Success
oleobject loo_Json
oleobject loo_DateTime
oleobject loo_Dt
integer li_GetAsLocal



loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_Json
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Json.EmitCompact = 0

// First, let's create JSON containing some date/time strings.
loo_Json.UpdateString("test.timestamp","2018-01-30T20:35:00Z")
loo_Json.UpdateString("test.rfc822","Tue, 24 Apr 2018 08:47:03 -0500")
loo_Json.UpdateString("test.dateStrings[0]","2018-01-30T20:35:00Z")
loo_Json.UpdateString("test.dateStrings[1]","Tue, 24 Apr 2018 08:47:03 -0500")
loo_Json.UpdateNumber("test.StartLoggingTime","1446834998.695")
loo_Json.UpdateNumber("test.Expiration","1442877512.0")
loo_Json.UpdateInt("test.StartTime",1518867432)

Write-Debug loo_Json.Emit()

// We've built the following JSON:

// {
//   "test": {
//     "timestamp": "2018-01-30T20:35:00Z",
//     "rfc822": "Tue, 24 Apr 2018 08:47:03 -0500",
//     "dateStrings": [
//       "2018-01-30T20:35:00Z",
//       "Tue, 24 Apr 2018 08:47:03 -0500"
//     ],
//     "StartLoggingTime": 1446834998.695,
//     "Expiration": 1442877512.0,
//     "StartTime": 1518867432
//   }
// }

// Use the DateOf and DtOf methods to load Chilkat date/time objects with the date/time values.
// The CkDateTime object is primarily for loading a date/time from numerous formats, and then getting
// the date/time in various formats.  Thus, it's primarly for date/time format conversion.
// The DtObj object holds a date/time where the individual components (day, month, year, hour, minutes, etc.) are 
// immediately accessible as integers.
loo_DateTime = create oleobject
// Use "Chilkat_9_5_0.CkDateTime" for versions of Chilkat < 10.0.0
li_rc = loo_DateTime.ConnectToNewObject("Chilkat.CkDateTime")

loo_Dt = create oleobject
// Use "Chilkat_9_5_0.DtObj" for versions of Chilkat < 10.0.0
li_rc = loo_Dt.ConnectToNewObject("Chilkat.DtObj")

li_GetAsLocal = 0

// Load the date/time at test.timestamp into the dateTime object.
li_Success = loo_Json.DateOf("test.timestamp",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)
Write-Debug string(loo_DateTime.GetAsUnixTime(0))
Write-Debug loo_DateTime.GetAsRfc822(li_GetAsLocal)

li_Success = loo_Json.DateOf("test.rfc822",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

loo_Json.I = 0
li_Success = loo_Json.DateOf("test.dateStrings[i]",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

loo_Json.I = 1
li_Success = loo_Json.DateOf("test.dateStrings[i]",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

li_Success = loo_Json.DateOf("test.StartLoggingTime",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

li_Success = loo_Json.DateOf("test.Expiration",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

li_Success = loo_Json.DateOf("test.StartTime",loo_DateTime)
Write-Debug loo_DateTime.GetAsTimestamp(li_GetAsLocal)

// Output so far:

// 	2018-01-30T20:35:00Z
// 	1517344500
// 	Tue, 30 Jan 2018 20:35:00 GMT
// 	2018-04-24T13:47:03Z
// 	2018-01-30T20:35:00Z
// 	2018-04-24T13:47:03Z
// 	2015-11-07T00:36:38Z
// 	2015-09-22T04:18:32Z
// 	2018-02-17T17:37:12Z

// Now load the date/time strings into the dt object:
li_Success = loo_Json.DtOf("test.timestamp",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

li_Success = loo_Json.DtOf("test.rfc822",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

loo_Json.I = 0
li_Success = loo_Json.DtOf("test.dateStrings[i]",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

loo_Json.I = 1
li_Success = loo_Json.DtOf("test.dateStrings[i]",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

li_Success = loo_Json.DtOf("test.StartLoggingTime",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

li_Success = loo_Json.DtOf("test.Expiration",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

li_Success = loo_Json.DtOf("test.StartTime",li_GetAsLocal,loo_Dt)
Write-Debug "month=" + string(loo_Dt.Month) + ", day=" + string(loo_Dt.Day) + ", year=" + string(loo_Dt.Year) + ", hour=" + string(loo_Dt.Hour) + ", minute=" + string(loo_Dt.Minute)

// Output:

// month=1, day=30, year=2018, hour=20, minute=35
// month=4, day=24, year=2018, hour=13, minute=47
// month=1, day=30, year=2018, hour=20, minute=35
// month=4, day=24, year=2018, hour=13, minute=47
// month=11, day=6, year=2015, hour=18, minute=36
// month=9, day=21, year=2015, hour=23, minute=18
// month=2, day=17, year=2018, hour=11, minute=37


destroy loo_Json
destroy loo_DateTime
destroy loo_Dt