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(Visual Basic 6.0) Fetch ISBN XML from isbndb.com and Parse

Demonstrates sending a query to isbndb.com and parsing the XML response.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim http As New ChilkatHttp

'  Any string unlocks the component for the 1st 30-days.
Dim success As Long
success = http.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    Text1.Text = Text1.Text & http.LastErrorText & vbCrLf
    Exit Sub
End If

'  The access_key in this URL is a valid access key, but limited to 100 queries per day.
'  If the key does not work, it may be that others were testing and exhausted the limit.
Dim strXml As String
strXml = http.QuickGetStr("http://isbndb.com/api/books.xml?access_key=OV8L2Y9I&results=details&index1=isbn&value1=0443074348")
If (http.LastMethodSuccess <> 1) Then
    Text1.Text = Text1.Text & http.LastErrorText & vbCrLf
    Exit Sub
End If

Dim xml As New ChilkatXml
success = xml.LoadXml(strXml)

'  The XML returned for this URL is the following:

'  <?xml version="1.0" encoding="UTF-8" ?>

'  <ISBNdb server_time="2007-10-25T14:07:25Z">
'      <BookList total_results="1" page_size="10" page_number="1" shown_results="1">
'          <BookData book_id="diagnostic_histopathology_of_tumors_2_volume_set_with_cd_rom" isbn="0443074348">
'              <Title>Diagnostic Histopathology of Tumors: 2-Volume Set with CD-ROMs</Title>
'              <TitleLong>Diagnostic Histopathology of Tumors: 2-Volume Set with CD-ROMs (Diagnostic Histopathology of Tumors (Fletcher))</TitleLong>
'              <AuthorsText>Christopher D. M. Fletcher (Editor)</AuthorsText>
'              <PublisherText publisher_id="churchill_livingstone">Churchill Livingstone</PublisherText>
'              <Details dewey_decimal="616" physical_description_text="2166 pages" language="" edition_info="Hardcover; 2007-03-13" dewey_decimal_normalized="616" lcc_number="" change_time="2006-12-13T14:53:42Z" price_time="2007-10-25T01:12:13Z" />
'          </BookData>
'      </BookList>
'  </ISBNdb>

'  First, navigate to the BookData node:
success = xml.FirstChild2()
success = xml.FirstChild2()

'  Show the Title and AuthorsText:
Text1.Text = Text1.Text & xml.GetChildContent("Title") & vbCrLf
Text1.Text = Text1.Text & xml.GetChildContent("AuthorsText") & vbCrLf

'  Show the publisher_id attribute of the PublisherText node:
Dim xml2 As ChilkatXml
Set xml2 = xml.FindChild("PublisherText")
Text1.Text = Text1.Text & xml2.GetAttrValue("publisher_id") & vbCrLf

'  Save the XML to a file:
success = xml.SaveXml("book.xml")

 

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