Solved

How to rewrite a XML vb.NET

Posted on 2004-08-04
5
556 Views
Last Modified: 2008-03-03
Hi Guys I have this function for write a XML file but I dont know how to rewrite the same file could anybody show me how to do this

Private Sub createXML_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ensalada_btn.Click
        Try
            'Initialize a XmlTextWrite Object
            Dim xmlDoc As XmlDocument
            'Instantiate an xmlDocument
            xmlDoc = New XmlDocument
            'Create a XmlDeclaration & append Declaration
            Dim xmlDec As XmlDeclaration = xmlDoc.CreateXmlDeclaration("1.0", Nothing, "no")
            xmlDoc.AppendChild(xmlDec)
            'Create a root Element
            Dim rootElement As XmlElement = xmlDoc.CreateElement("Transaccion_Temp", Nothing)
            'Create First Level
            Dim elementLevelOne As XmlElement = xmlDoc.CreateElement("Order", Nothing)
            elementLevelOne.SetAttribute("id", "1")
            Dim hsAttr As New Hashtable
            hsAttr.Add("badge", "1235")
            hsAttr.Add("date", "2004/08/03")
            elementLevelOne.AppendChild(myElement(xmlDoc, "Worker", "595893", hsAttr))
            rootElement.AppendChild(elementLevelOne)
            xmlDoc.AppendChild(rootElement)
            xmlDoc.Save("c:/test1.xml")

        Catch ex As XmlException
            MsgBox(ex.Message)
        End Try


     
    End Sub

    Function myElement(ByVal xmlDocument As XmlDocument, ByVal ElementName As String, ByVal elementString As String, ByVal htAttr As Hashtable) As XmlElement
        'Add Element & Attributes to a XML Element
        Dim objElement As XmlElement = xmlDocument.CreateElement(ElementName)
        Dim enumAttr As IDictionaryEnumerator
        If Not htAttr Is Nothing And htAttr.Count <> 0 Then
            enumAttr = htAttr.GetEnumerator
            While enumAttr.MoveNext
                objElement.SetAttribute(enumAttr.Key.ToString(), enumAttr.Value.ToString())
            End While
        End If
        objElement.AppendChild(xmlDocument.CreateTextNode(elementString))
        Return objElement

    End Function
0
Comment
Question by:Jose_Cabrero
  • 2
  • 2
5 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 11722499
What do you mean by "rewrite the same file"?

Bob
0
 

Author Comment

by:Jose_Cabrero
ID: 11725481
Add more nodes to the same root for example

<root>
     <node>Example1 </node>
     <node>Example2 </node>
</root>

<root>
     <node>Example1 </node>
     <node>Example2 </node>
     <node>Example3</node>
</root>

Something like insert a new record in the DB
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 11725914
Are you using XML as a database?

Bob
0
 

Author Comment

by:Jose_Cabrero
ID: 11743928
Yes I'm but now I have another question for you guys do you know how to delete a specific childNode on the XML database

for example

<root>
     <node key=1>Example1 </node>
     <node key=2>Example2 </node>
     <node key=3>Example3</node>
</root>


how can I delete the key 2 from the roop parent

(I'm using VB.NET and XML db)
0
 

Accepted Solution

by:
garyolliffe earned 500 total points
ID: 12026581
Just had to translate this from C# in place, so Apologies if there is a type or two...

Gary.....

Public Function DoAdd(doc as XmlDocument, keyVal as String, value as String) as XmlDocument
    Dim element as XmlElement = doc.CreateElement("node")
    element.InnerText = value
    element.SetAttribute("key", keyVal)
    Dim node as XmlNode  = doc.SelectSingleNode("root")
    If not IsNothing(node) Then
      node.AppendChild(element)
    End If
    Return doc
End Function

Public Function RemoveByKey(doc as XmlDocument, keyVal as String) as XmlDocument
     Dim removeNode as XmlNode = doc.SelectSingleNode("root/node[@key='" & keyVal & "']")
     If Not IsNothing( removeNode ) Then
          removeNode.ParentNode.RemoveChild(removeNode)
     End If
     Return doc
End Function
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to join on ID, with prefix? 15 60
C# bracket error 3 33
C# Gridview 1 33
How do you pull mopre then 1000 records using VB.NET Directory Services namespace 2 21
IP addresses can be stored in a database in any of several ways.  These ways may vary based on the volume of the data.  I was dealing with quite a large amount of data for user authentication purpose, and needed a way to minimize the storage.   …
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
In a recent question (https://www.experts-exchange.com/questions/28997919/Pagination-in-Adobe-Acrobat.html) here at Experts Exchange, a member asked how to add page numbers to a PDF file using Adobe Acrobat XI Pro. This short video Micro Tutorial sh…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question