Question

Extract information from XML file

Asked by: noobe1

Hi Experts,
I loaded an XML file from URL and extract information from it.

1)The code that I currently using works but I'm wondering if there is a better way to do it.
2) How do I get "edition_info" from the "Details" tag?

Thanks.

Dim doc As New XmlDocument
        doc.Load("http://isbndb.com/api/books.xml?access_key=N6XI6S3K&results=details&index1=isbn&value1=0062059262")
        Dim list As XmlNodeList = doc.GetElementsByTagName("Title")
        For Each n As XmlNode In list
            TextBox1.Text = n.InnerText
        Next
 
        list = doc.GetElementsByTagName("AuthorsText")
        For Each n As XmlNode In list
            TextBox2.Text = n.InnerText
        Next

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Asked On: 2009-09-04 at 02:49:14ID24707171
Topic: Programming for ASP.NET
Participating Experts: 3
Points: 500
Comments: 12

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Answers

by: jpaulinoPosted on 2009-09-04 at 03:02:49ID: 25258018

What versions of Visual Studio do you use ?

by: ajaysharmaapjsPosted on 2009-09-04 at 03:29:23ID: 25258139

Here are some links to help:

http://support.microsoft.com/kb/307548

http://www.developer.com/net/cplus/article.php/3504981

http://www.dotnetspider.com/resources/5761-Read-Write-XML-files-using-VB-NET.aspx

http://www.c-sharpcorner.com/UploadFile/mahesh/ReadingXmlFile11142005002137AM/ReadingXmlFile.aspx

by: abhigyanPosted on 2009-09-04 at 04:15:22ID: 25258367

Yes there s definetly a better way. Please use dataset. The code would be something like this:

Dim dsPubs As New DataSet()

' Read in XML from file
dsPubs.ReadXml("Pubs.xml") - //Give the url in place of pubs.xml

Now you can use a for loop and get all the elements by using dsPub.Tables(0).Items or dsPub.Tables(0).Rows

by: noobe1Posted on 2009-09-05 at 06:30:41ID: 25266210

jpaulino,
I'm using VS2008.

ajaysharmaapjs,
Will look over those.

abhigyan,
I used your code and the dataset has 5 tables and all tables have the same name ISBNdb. In order to retrive the AuthorsText, I have to loop through each table to find a column that has that column name and then extract the value. This is not much better than what I already have.

Thanks

by: abhigyanPosted on 2009-09-05 at 06:51:25ID: 25266281

You forgot to clear the dataset it seems. Why dont you post the entire scenario here and I'll see what possible way we can achieve it with least amount of pain.

by: noobe1Posted on 2009-09-05 at 07:06:32ID: 25266332

abhigyan,
I didn't clear the dataset because the dataset is empty when it reads the XML file. The 5 tables contains data from the loaded XML doc.

Anyway, I think I found the easiest way. It's actually a modification of my original code:

        Dim doc As New XmlDocument
        doc.Load("http://isbndb.com/api/books.xml?access_key=N6XI6S3K&results=details&index1=isbn&value1=0062059262")
        MsgBox(doc.GetElementsByTagName("BookData").Item(0).Attributes("isbn").InnerText)
        MsgBox(doc.GetElementsByTagName("BookData").Item(0).Attributes("isbn13").InnerText)
        MsgBox(doc.GetElementsByTagName("Title").Item(0).InnerText)
        MsgBox(doc.GetElementsByTagName("TitleLong").Item(0).InnerText)
        MsgBox(doc.GetElementsByTagName("AuthorsText").Item(0).InnerText)
        MsgBox(doc.GetElementsByTagName("PublisherText").Item(0).InnerText)
        MsgBox(doc.GetElementsByTagName("Details").Item(0).Attributes("edition_info").InnerText)

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by: abhigyanPosted on 2009-09-05 at 07:12:33ID: 25266345

Good. As long as it works.

by: jpaulinoPosted on 2009-09-05 at 07:15:06ID: 25266355

You could use XML Literals that it's very easy to work with. Do you want an example ?

by: jpaulinoPosted on 2009-09-05 at 08:56:59ID: 25266640

Here's an easy example how you can do that:

        Dim xmlFile = XDocument.Load("http://isbndb.com/api/books.xml?access_key=N6XI6S3K&results=details&index1=isbn&value1=0062059262")
        MessageBox.Show(xmlFile...<BookData>.@isbn)
        MessageBox.Show(xmlFile...<BookData>.@isbn13)
        MessageBox.Show(xmlFile...<Title>.Value)
        ' ...

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by: noobe1Posted on 2009-09-05 at 22:29:27ID: 25268800

jpaulino,
Could you please provide the code between xmlFile and <BookData>. I'm kinda new to this.

Thanks

by: noobe1Posted on 2009-09-05 at 23:08:11ID: 25268853

jpaulino,
Nvm. I figured it out.

Thanks

by: jpaulinoPosted on 2009-09-06 at 02:07:52ID: 25269226

Glad I could help!

20120131-EE-VQP-002

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Question

Extract information from XML file

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Programming for ASP.NET

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